DVP-120 Installation & Operating Instructions
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Figure 3-4 Normal System Display..................................................................................................................... 17
Figure 3-5 Sensor prompt.................................................................................................................................... 17
Figure 3-6 Alarm display..................................................................................................................................... 17
Figure 3-7 Alarm Silenced message .................................................................................................................... 18
Figure 3-8 Warning display................................................................................................................................. 18
Figure 3-9 Warning Silenced message ................................................................................................................ 18
Figure 3-10 Trouble display ................................................................................................................................ 18
Figure 3-11 Trouble Silenced message................................................................................................................ 19
Figure 3-12 Zone Signal display.......................................................................................................................... 19
Figure 3-13 Zone Signal Silenced message......................................................................................................... 19
Figure 3-14 Hardware Summary ......................................................................................................................... 20
Figure 3-15 Save Configuration? Prompt............................................................................................................ 20
Figure 3-16 Set Time of Day............................................................................................................................... 21
Figure 3-17 Enter Hours...................................................................................................................................... 21
Figure 3-18 Enter Minutes................................................................................................................................... 21
Figure 3-19 Set Day of the week ......................................................................................................................... 22
Figure 3-20 Load Default Configuration............................................................................................................. 22
Figure 3-21 Enter Password................................................................................................................................. 23
Figure 3-22 Password Prompt ............................................................................................................................. 23
Figure 3-23 Wrong Password Prompt ................................................................................................................. 23
Figure 3-24 Sensor Summary.............................................................................................................................. 24
Figure 3-25 Sensor Type ..................................................................................................................................... 24
Figure 3-26 Sensor’s Alarm Level ...................................................................................................................... 24
Figure 3-27 Sensor’s Warning Level................................................................................................................... 25
Figure 3-28 Sensor’s Range................................................................................................................................. 25
Figure 3-29 Relay Summary................................................................................................................................ 26
Figure 3-30 Relay Mode...................................................................................................................................... 26
Figure 3-31 Turn On Delay ................................................................................................................................. 26
Figure 3-32 Minimum on time ............................................................................................................................ 26
Figure 3-33 Horn Summary................................................................................................................................. 27
Figure 3-34 Horn Mode....................................................................................................................................... 27
Figure 3-35 Horn Turn On Delay........................................................................................................................ 27
Figure 3-36 Horn Minimum on time ................................................................................................................... 27
Figure 3-37 Strobe Summary............................................................................................................................... 28
Figure 3-38 Strobe Mode..................................................................................................................................... 28
Figure 3-39 Strobe Turn On Delay...................................................................................................................... 28
Figure 3-40 Strobe Minimum on time ................................................................................................................. 28
Figure 3-41 Zone Controls................................................................................................................................... 29
Figure 3-42 Zone Group Type............................................................................................................................. 29
Figure 3-43 Timer Days Selection....................................................................................................................... 30
Figure 3-44 Start Time Selection......................................................................................................................... 30
Figure 3-45 Stop Time Selection......................................................................................................................... 30
Figure 3-46 Sensor Selection............................................................................................................................... 30
Figure 3-47 Add/Remove sensor prompt............................................................................................................. 30
Figure 3-48 Rising Trip Point Entry.................................................................................................................... 31
Figure 3-49 Falling Trip Point Entry................................................................................................................... 31
Figure 3-50 Sensor Mode Selection..................................................................................................................... 31
Figure 3-51 Quorum Entry .................................................................................................................................. 31
Figure 3-52 Alarm Signals................................................................................................................................... 32
Figure 3-53 Buzzer Alarm Signal........................................................................................................................ 32
Figure 3-54 Horn Alarm Signal........................................................................................................................... 32
Figure 3-55 Strobe Alarm Signal......................................................................................................................... 33
Figure 3-56 Warning Signals............................................................................................................................... 33
Figure 3-57 Buzzer Warning Signal .................................................................................................................... 33
Figure 3-58 Horn Warning Signal ....................................................................................................................... 33
Figure 3-59 Strobe Warning Signal..................................................................................................................... 34
Figure 3-60 Trouble Signals ................................................................................................................................ 34
Figure 3-61 Buzzer Trouble Signal ..................................................................................................................... 34
Figure 3-62 Horn Trouble Signal ........................................................................................................................ 34
Figure 3-63 Strobe Trouble Signal ...................................................................................................................... 35
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LIST OF TABLES
Table 2-1 Main Power Connections .................................................................................................................... 10
Table 2-2 Recommended Wire Gauge................................................................................................................. 10
Table 2-3 Connector to Sensor Channel Mapping............................................................................................... 11
Table 2-4 Sensor Connectors: Channel and Pin Assignments............................................................................. 11
Table 2-5 Relay Interface Signals and Connector Assignments.......................................................................... 12
Table 2-6 Horn & Strobe signals and Connector Assignments ........................................................................... 13
Table 2-7 Wire gauge for Horn & Strobe functions ............................................................................................ 13
Table 2-8 Macurco Transducers.......................................................................................................................... 14
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1 INTRODUCTION
1.1 General Information
The DVP-120 Gas Detection and Ventilation Control Panel is a microcomputer based control panel used to
operate ventilation fans based on the inputs from remotely mounted gas transducers. The unit is fully tested
prior to leaving the factory, and is ready for operation after the wiring is complete and the user system
configuration is entered.
System wiring includes the main power connection for the DVP-120, current loop and power connections
between the remote sensors and the DVP-120, the fan control connections and/or alarm connections from the
DVP-120 to the building ventilation and automation systems. Refer to Figure 1-1 for a representative system-
wiring diagram.
The system configuration is entered by the user through the LCD display and keypad. Refer to Figure 1-2 for
equipment locations. The system display provides the user with the system status, and the status of each
configured sensor. In addition, all control functions of the DVP-120 may be accessed through the system
display and keypad.
1.2 Features
– Twelve analog (current loop) input channels
– Three 16A, 240 VAC SPDT fan/alarm relays
– Drivers for external Horn and Strobe
– Externally visible system, alarm and relay status indicators
– Externally visible LCD display showing the status of each transducer and relay
– External keypad for user selection of the transducer/alarm display and setting the configuration
(password protected)
– Up to three ventilation control zones can be defined
– Each zone can be controlled based on transducer signals and/or time of day
– Each relay is configurable for delay before activation and minimum on time
– Fail safe operation can be implemented
– Lockable Nema 1 type enclosure
– Modular input and output connectors
1.3 Compatible Macurco Transducers
Carbon Monoxide (CO):
– CM-2B – Solid State sensor with local concentration display (ppm)
– CM-3 – Electrochemical sensor with local concentration display (ppm)
Nitrogen Dioxide (NO):
– ND-2 – Electrochemical sensor with local concentration display (ppm)
Combustible Gasses (EX):
– GT-11A – Solid State Sensor
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NOTE:
ENGINEER AND ARCHITECT SPECIFICATIONS
1. Power connections at the sensor are non-polarized.
Gas detection and exhaust fan control is provided by a Macurco DVP-120
system. This System will use CM-2B or CM-3 Carbon Monoxide (CO) to
current transducers, ND-2 Nitrogen Dioxide to current transducers or GT-
11A Combustible Gas to current transducers. Each transducer will measure
the level of the target gas and provide this information to the DVP-120 over
a 4-to-20 mA current loop. The Transducers are mounted in a standard 6"
x 6" electrical enclosure, and operate on low voltage (24 VDC).
2. DVP-120 connections are representative of J7, J8, J10, J11, J13 and J14.
CM-2B
GT-11A
output
mA
V
output
power
power
output
B
-
A
+
D
C
D
C
-
-
+
+
All power and signal connections for the transducers are provided from the
DVP-120 control panel, via unshielded four conductor cable. The DVP-120
control panel provides three relays which can be used for ventilation fan
control or alarm signaling . These relays (SPDT - Form C) are for pilot duty
only, capable of switching 10 amp loads up to 240 VAC .
J7, J8,
J10, J11,
J13, L14
8
7
6
5
4
3
2
1
Main Fan Power
J2
- Strobe
+ Strobe
- Horn
4
MACURCO DVP-120
GAS DETECTION AND
VENTILATION CONTROL PANEL
coil
3
2
1
Exhaust Fans
+ Horn
Relay 1
Relay 2
Relay 3
coil
Panel Power
120/250 VAC
Gnd
120 VAC
ALARM
N
L
STARTER RELAYS
120 VAC COILS
1
2
3
4
5
6
7
8
9
J4
1
3
J2
120 VAC
Power
NOTE
1. Typical coverage for a CO sensor is 5000 sq. ft., 900 sq. ft. for combustible gasses.
Extra sensors may be needed near areas where people work, such as toll booths.
2. Macurco provides only the control panels and sensors. Fans, relays, and other devices are provided by the contractor.
3. See the appropriate building code for the size of fans and air changes per unit of time.
Typical layout in Parking Garage
exhaust fan
Air inlet:
door, damper,
louvier
DVP-120
panel
CM-2B,
CM-3 or
SS102HC-1
CM-2B,
CM-3 or
SS102HC-1
CM-2B,
CM-3 or
SS102HC-1
space sensors equally,
mount 5 feet above floor
Air inlet:
door, damper,
louvier
exhaust fan
Figure 1-1 System Wiring Diagram
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Figure 1-2 DVP-120 Internal View
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1.4 Specifications1
– Size:
10” x 12” x 2” (254 mm x 305 mm x 51 mm)
TBD
– Weight:
– Enclosure:
Nema 1 equivalent steel
– Operating Temperature:
0° to 50 °C (-32 to 122 °F)
– Operating Humidity:
– Power Input:
0% to 95% RH non-condensing
100 – 240 VAC, 1 Amp, 47 – 63 Hz, single phase
SPDT, 120/240 VAC, 16 A resistive
2 rows of 16 characters with backlight
Power, ALARM/warning, Silenced, Relay 1, Relay 2 & Relay 3
Internal buzzer, 90 dbA at 1ft
24VDC, maximum 250 mA
– Relay Rating (3):
– LCD Display:
– Status Indicators (LED):
– Audible indicator:
– External Drivers (2):
– CO Transducer Range:
– NO Transducer Range:
– EX Transducer Range:
– Relay On Delay:
0 – 250PPM
0 – 9.0 PPM
0 – 10,000 PPM
0 – 15 minutes in 1 second increments
0 – 15 minutes in 1 second increments
– Relay Off Delay:
1.5 Warranty
The DVP-120 Gas Detection and Ventilation Control Panel is warranted to be free from defective material and
workmanship for a period of two (2) years from the date of manufacture (stamped on the unit). If any
component becomes defective during the warranty period, it will be replaced or repaired free of charge, if the
unit is returned in accordance with the instructions below. This warranty does not apply to units that have been
altered or had repair attempted, or that have been subjected to abuse, accidental or otherwise. The above
warranty is in lieu of all other express warranties, obligations, or liabilities.
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE
ARE LIMITED TO A PERIOD OF TWO (2) YEARS FROM THE PURCHASE DATE.
Macurco shall not be liable for any incidental or consequential damages for breach of this or any other warranty
express or implied, arising out of or related to the use of the control panel. Manufacturer or its agent’s liability
shall be limited to replacement or repair as set forth above. Buyer’s sole and exclusive remedies are return of
the goods and repayment of the price, or repair and replacement of non-conforming goods or parts. (The
Uniform Commercial Code applicable in the State of Colorado shall govern)
1.6 Return Instructions
Call (303) 781-4062 for a Return Authorization form. Then carefully pack the control panel with a written
description of the nature of the return. Send the unit to the following address:
Aerion Technologies Inc.
6555 S. Kenton St., Ste 304
Centennial, CO
USA 80111
1
Macurco reserves the right to modify or change the specifications of all products without prior
notification to the user.
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2 Installation & Connection
2.1 Mounting the DVP-120
Mounting holes are provided in the DVP-120 case at the four corners. The top two are keyhole shaped so that
the panel can be hung and then the two bottom screws driven to hold the panel. Conduit entry holes are
provided on the top, bottom and right side of the panel. The panel should be mounted with sufficient space all
around, depending on the complexity of the installation.
Main power wiring should conform to national and local electrical codes, and may require separate inspections
and certification. Contact your local building authority for further details. If safety certification is required to
obtain your occupancy certificate, Macurco can contract to provide testing services to obtain certification (such
as the ETL label) by a national testing laboratory. Contact the Macurco Sales Department for further details.
2.2 General Wiring Information
WARNING
High voltage terminals (120/240 VAC) are located within the
DVP-120, presenting a hazard to service technicians. Only
qualified technicians should open the DVP-120 case and
service the internal circuits. Ensure power is removed from the
DVP-120 prior to servicing the unit.
With the exception of the safety ground, all field wiring is done via modular connectors (provided) so that the
wiring can be done easily and then simply plugging the modular connectors into the matching connectors on the
PCB.
The power and signal connections to the remote mounted sensors should be size AWG18 (minimum) for short
runs. Refer to Table 2-2 for recommended wire gauges. Four conductor cables may be used in all cases since
the DVP-120 employs DC power for remote sensors to prevent electrical noise from interfering with the sensor
output signal.
Do not bundle sensor power and/or signal connections with other AC power cables to prevent electrical
interference. If other AC power connections must be bundled with the DVP-120 sensor cables, Macurco
recommends that the sensor connections be made with two twisted pairs of the appropriate gauge, with an
overall foil and braid shield. All shields should be terminated at the DVP-120 end of the cable only. A ground
stud is provided near the bottom left corner of the panel.
Typical part numbers for AWG18 are:
–
–
Alphawire 55132
Belden TBD
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2.3 Main power Connection
The main power cable should be routed into the bottom left conduit entry.
Macurco recommends a minimum wire size of AWG18. The modular connector will accept wire from 12 to 24
AWG.
The safety ground wire should be secured to the ground stud at the bottom left of the cabinet with the lock
washer and nut supplied. Macurco recommends the use of a ring terminal for the ground connection.
Refer to Table 2-1 for DVP-120 power connections.
The line and neutral wires should be stripped 1/4 in. (6.5 mm), insert the wire into the wire cavity of the
modular connector and tighten the screw clamp. Ensure that the wire cannot be easily pulled from the
connector. Plug the modular connector into J4 on the PCB and ensure that it latches into the header properly.
Signal
Line (120/220/240/250 VAC)
Neutral
Terminal Connection
J4-3
J4-1
Ground
Ground Stud
Table 2-1 Main Power Connections
2.4 Remote Sensor Connection
Each remote sensor is connected by a four-wire connection – two wires for DC power and two wires for the 4 –
20 mA loop connection. The sensors are connected to the control panel PCB with modular connectors, two
sensors per connector. See Figure 2-1 for a view of a typical sensor connector. Refer to Table 2-2 for wire size
recommendations.
1
8
Insert this face of connector
into mating connector on
control circuit board.
Figure 2-1 Sensor Interface Connector
Wire gauge
Maximum Run Length (ft.)
(feet)
500
800
(meters)
152
244
18
16
14
1250
381
Table 2-2 Recommended Wire Gauge
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Each 8-terminal sensor modular connector may be disconnected from the PCB connector to ease wire
installation. The terminals will accept wire from 16 to 28 AWG. To install a wire, strip back approximately 0.25
in. (6 mm) of insulation, and insert the bare wire into the terminal. Tighten the screw clamp and ensure that the
wire cannot be easily pulled from the connector. Table 2-3 lists the connector to sensor channel correspondence.
While Table 2-4 lists channel signals, connector and terminal assignments for all 12 input channels.
Control Board Connector
Sensor Channels
J7
1, 2
3, 4
5, 6
J10
J13
J8
7, 8
J11
J14
9, 10
11, 12
Table 2-3 Connector to Sensor Channel Mapping
Signal Name
Connector Signal Name
-Pin
Connector Signal Name
-Pin
Connector
-Pin
Number
J7-5
J7-6
J7-7
J7-8
J7-1
J7-2
J7-3
Number
J13-5
J13-6
J13-7
J13-8
J13-1
J13-2
J13-3
J13-4
J8-5
J8-6
J8-7
J8-8
J8-1
J8-2
J8-3
J8-4
Number
J11-5
J11-6
J11-7
J11-8
J11-1
J11-2
J11-3
J11-4
J14-5
J14-6
J14-7
J14-8
J14-1
J14-2
J14-3
J14-4
CH 1 +24 Vdc
CH 1 +I loop
CH 1 -I loop
CH 1 24Vdc Ret
CH 2 +24 Vdc
CH 2 +I loop
CH 2 -I loop
CH 2 24Vdc Ret
CH 3 +24 Vdc
CH 3 +I loop
CH 3 -I loop
CH 3 24Vdc Ret
CH 4 +24 Vdc
CH 4 +I loop
CH 4 -I loop
CH 5 +24 Vdc
CH 5 +I loop
CH 5 -I loop
CH 5 24Vdc Ret
CH 6 +24 Vdc
CH 6 +I loop
CH 6 -I loop
CH 6 24Vdc Ret
CH 7 +24 Vdc
CH 7 +I loop
CH 7 -I loop
CH 7 24Vdc Ret
CH 8 +24 Vdc
CH 8 +I loop
CH 8 -I loop
CH 9 +24 Vdc
CH 9 +I loop
CH 9 -I loop
CH 9 24Vdc Ret
CH 10 +24 Vdc
CH 10 +I loop
CH 10 -I loop
CH 10 24Vdc Ret
CH 11 +24 Vdc
CH 11 +I loop
CH 11 -I loop
CH 11 24Vdc Ret
CH 12 +24 Vdc
CH 12 +I loop
CH 12 -I loop
CH 12 24Vdc Ret
J7-4
J10-5
J10-6
J10-7
J10-8
J10-1
J10-2
J10-3
J10-4
CH 4 24Vdc Ret
CH 8 24Vdc Ret
Table 2-4 Sensor Connectors: Channel and Pin Assignments
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2.5 Relay Connection
All poles of the three relays are available at the modular connector J2 (see Figure 2-2 for details). J2 is a 9-
position variant of the high voltage modular connector used for power input. Each terminal can accommodate a
wire size 12 to 24 AWG.
1
9
Insert this face of connector
into mating connector on
control circuit board.
Figure 2-2 Relay Connector
To install the wiring for the relays, disconnect the connector from the header on the PCB. Strip the insulation of
each wire back approximately 1/4 in. (6.5 mm), insert the bare wire into the terminal and tighten the screw
clamp. Ensure that the wire cannot easily be pulled from the connector.
Note that the panel configuration can designate Relay-1 as an ALARM signal relay. Relay-2 and Relay 3 are
general purpose in function.
Refer to Table 2-5 for output signals, connector and terminal assignment for all three relays.
Signal Name
Connector-
Pin Number
J2-1
Signal Name
Connector-
Pin Number
J2-4
Signal Name
Connector-
Pin Number
J2-7
Relay 1 NC
Relay 2 NC
Relay 2 NC
Relay 1 NO
J2-2
Relay 2 NO
J2-5
Relay 2 NO
J2-8
Relay 1 Common
J2-3
Relay 2 Common
J2-6
Relay 2 Common
J2-9
Table 2-5 Relay Interface Signals and Connector Assignments
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2.6 Horn & Strobe Connection
The external horn and strobe connections are available at the modular connector J5 (see Figure 2-3 for details).
J5 as a 4-position connector, similar to the sensor interface connectors.
1
4
Insert this face of connector
into mating connector on
control circuit board.
Figure 2-3 Horn & Strobe Connector
To install the wiring for the horn or strobe, disconnect the connector from the header on the PCB. Strip the
insulation of each wire back approximately 0.25 in. (6 mm), insert the bare wire into the terminal and tighten
the screw clamp. Ensure that the wire cannot easily be pulled from the connector.
When all wires are connected, seat the modular connector into the PCB header; ensure that the latch engages.
Refer to Table 2-6 for signals, connector and terminal assignment for the horn and strobe.
Signal Name
Connector-Pin
Number
J5-1
Signal Name
Connector-Pin
Number
J5-3
Horn +
Horn -
Strobe +
Strobe -
J5-2
J5-4
Table 2-6 Horn & Strobe signals and Connector Assignments
Refer to Table 2-7 for recommended wire gauge vs. run length for the horn & strobe functions (maximum 2.5
volt drop in the wire).
Maximum Run Length (ft.)
Wire gauge
(feet)
200
340
480
850
(meters)
61
103
147
215
24
22
20
18
Table 2-7 Wire gauge for Horn & Strobe functions
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2.7 Interfacing Macurco Sensors
All Macurco CO, NO2 and combustible gas sensors with current loop outputs may be used with the DVP-120.
Data sheets for the Macurco sensors listed in Table 2-8 are provided as an appendix to this manual.
Power connections to Macurco sensors used with the DVP-120 are polarity-insensitive, since a bridge rectifier
is connected to the power input terminals. All sensors used with the DVP-120 panel employ screw clamp
terminal blocks for power and signal connections.
Polarity of the current loop connections is marked on the printed circuit board of the sensor.
Description
Order Part Number
CM-2B
Carbon Monoxide Transducer with solid-
state sensor
Carbon Monoxide Transducer with
Electro-chemical sensor
CM-3
Nitrogen Dioxide Transducer with a 5A
relay
ND-2
Combustible Gas Transducer
GT-11A
Table 2-8 Macurco Transducers
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3 Operation
3.1 Initial Operating Mode
When power is first applied to the DVP-120, a few simple tests will be performed, e.g. cycle through all status
lights, and display the system name and model # (Figure 3-1). The system will then proceed to normal mode, if
the operating parameters have been entered.
DVP - 1 2 0 Ve r 1 . 0 1
Figure 3-1 Model Display
If the user has not entered any parameters, the system WILL NOT be monitoring the sensors or controlling the
ventilation system. The relays will be in the not actuated state and the horn and strobe outputs will be off. The
power status light will show NORMAL (steady green) and the system will immediately enter the
CONFIGURATION mode, see section 3.2 for details to set the configuration parameters.
If a valid set of configuration parameters have been entered the panel will wait for all sensors to warm up.
During this time, the display will show a count down, minutes and seconds, until the end of the warm-up period,
Figure 3-2.
D V P - 1 2 0 V e r . 1 . 0 1
W a r m - u p
2 : 3 0
Figure 3-2 Warm-Up display
During the warm-up period, the keypad will be locked. When the warm-up period ends, the LCD will start
showing the normal display, Figure 3-4.
3.1.1 Status Light Display
The POWER, ALARM/WARNING, SILENCE, RELAY 1, RELAY 2 and RELAY 3 status lights indicate the
system status and provide the following data:
?
?
POWER
?Green (steady) – Power is good and there are no trouble indications
?Yellow (steady) – Trouble is indicated by a transducer or the panel itself
ALARM/WARNING
?Off
?Red (steady)
– All indicated gas levels are below the warning level
– One or more gas levels is at or above the alarm level
?Amber (steady) – One or more gas levels is at or above the warning level
SILENCE
?Off
?
–There are no silenced alarms or warnings
?Red (flashing) –There are alarms and/or warnings that have been silenced (gas levels may
or may not still be at alarm or warning levels)
?
?
?
RELAY 1
?Off
?Green (steady) – Relay 1 is on
RELAY 2
?Off
?Green (steady) – Relay 2 is on
RELAY 3
?Off
?Green (steady) – Relay 3 is on
– Relay 1 is not on
– Relay 2 is not on
– Relay 3 is not on
The overall system status is visible at a distance via the status lights as described above. More detailed system
information is displayed on the LCD, which can show the status of each relay and sensor. A typical status
display is shown in Figure 3-4.
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3.1.2 User Interface
The LCD display is used to show detailed information about the status of the control system and the
configuration parameters to the user. The keypad (Figure 3-3) is used to select the information displayed and to
enter the configuration parameters, which are stored in the DVP-120 non-volatile memory. The keypad consists
of the usual ten digit keys, the normal four direction keys, plus a MENU key that is used to access the
configuration menu and a HUSH key that will silence the audible alarm indicators.
Figure 3-3 Keypad layout
In normal mode, no warnings or alarms that have not been silenced, the up and down cursor keys will scroll the
display to any configured sensors’ status.
In normal mode, the left and right cursor keys will scroll through all relays’ status. When the left (or right) key
is used to scroll to another relay the display will remove the underlining under the sensor number and underline
the relay number, this indicates that the digit keys can be used to jump directly to a particular relay’s status.
When the up or down key is again used the display will switch back to the digit keys jumping to a particular
sensor.
The MENU key has three functions. First, when the system is presenting the normal display, pressing the
MENU key will cause the system to shift to the Configuration Menu. The second function of the MENU key is
to return to the next-higher menu level, e.g. from the sensor configuration menu to the system menu, or from the
system menu out to normal mode. When the MENU key is used to return to normal mode, any changed
configuration parameters are saved in the DVP-120’s non-volatile memory. The third function of the MENU
key is to change the LCD contrast by holding the MENU key for five (5) seconds, at which point the LCD will
prompt for further activities, see sections 4.4 for more detail..
The HUSH key is only used to silence the audible indicators (internal buzzer and possible external Horn and
Strobe devices). Pressing and releasing the button will silence the internal buzzer. The HUSH button must be
held for 3 seconds to silence the Horn and Strobe devices. See sections 3.1.4, 3.1.5 and 3.1.6 for more detail.
In normal mode, holding the zero key for three (3) seconds can be used to lock the keypad against accidental (or
unauthorized) use. See section 4.5 for details.
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3.1.3 Normal Status Display
MO N 1 0 : 2 3 R 1 O F F
S 0 1 C O 5 P P M
Figure 3-4 Normal System Display
The display shows the day of the week and the time of day, in 24-hour format. It also shows the status of one of
the relays, R1 in this example, and the type and indicated gas concentration of one of the configured sensors,
S01 is a CO sensor indicating 5 ppm in this example.
Notice in Figure 3-4 that the digits 01 are underlined, this indicates that the digit keys can be used to jump
directly to another sensor’s status. When the first digit is pressed, the display will prompt for the sensor to
display.
S h o w S e n s o r _ 1
Figure 3-5 Sensor prompt
In this example, the first digit entered was 1. Since the DVP-120 can handle 12 sensors, the first digit for a
sensor number is either 0 or 1. The leading zero must be entered when selecting a sensor less than ten. When the
second digit is entered, the normal display will be restored; showing the type and value for the selected sensor.
As mentioned above, the left and right scroll keys will display the next (previous) relay’s status. The display
will also change the underline to indicate that the digit keys (zero, one and two) can be used to jump directly to
a particular relay. Since only one digit is needed to select a relay, the system does it immediately rather than
prompting to show the relay.
If the sensor is indicating a gas level that is greater than the alarm or warning levels the gas reading will
alternate with the words ALARM or WARNING as appropriate. If the sensor is indicating a trouble condition
the gas reading will be replaced by the word TROUBLE.
3.1.4 ALARM Status Display
When any sensor indicates a gas level that is at or above the configured alarm level for the sensor, the panel will
enter ALARM mode, during which the internal buzzer will sound, the alarm lamp will be red and the LCD will
show the sensor type and channel number.
A L A RM
C O S E N S O R 0 2
Figure 3-6 Alarm display
The display will cycle through all sensors that are signaling alarm levels, at five seconds per display. Pressing
any key (except HUSH) will advance the display to the next sensor that is signaling an alarm level.
If an external horn and/or strobe are connected and configured to signal an alarm condition, they will also sound
when an alarm condition occurs, after a delay if that configuration option is used.
When the HUSH key is pressed, the internal buzzer will be silenced for five (5) minutes. If the horn or strobe
turn on delays have not finished then they will also be silenced. If the delays have finished the HUSH key must
be held for three (3) seconds in order to silence the horn and strobe.
When all indicators have been silenced, the display will show that alarms have been silenced for five minutes.
After any key press (or five seconds), the display will return to normal mode.
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A L A RM S I L E N C E D
F O R 5 M I N U T E S
Figure 3-7 Alarm Silenced message
If Relay 1 has be configured as an ALARM relay it will be turned on when an alarm condition is recognized
and will be turned off when all audio indicators have been silenced.
Silencing applies to the cause(s) of the alarm when the HUSH key is pressed.
3.1.5 Warning Status Display
When any sensor indicates a gas level that is at or above the configured warning level for the sensor, the panel
will enter WARNING mode during which the internal buzzer will sound, the alarm/warning lamp will be amber
and the LCD will show the sensor type and channel number.
WA R N I NG
C O S E N S O R 0 2
Figure 3-8 Warning display
The display will cycle through all sensors that are signaling warning levels, at five seconds per display. Pressing
any key (except HUSH) will advance the display to the next sensor that is signaling a warning level.
If the buzzer and/or an external horn and/or external strobe are connected and configured to signal a warning
condition, they will also sound when a warning condition occurs. There is a configurable delay for the horn or
strobe will sound, see sections 3.3.5.3 and 3.3.6.3.
When the HUSH key is pressed, the internal buzzer will be silenced for fifteen (15) minutes. If the horn or
strobe turn on delays have not finished then they will also be silence. If the delays have finished, the HUSH key
must be held for three (3) seconds in order to silence the horn and strobe.
When all indicators have been silenced, the display will show that warnings have been silenced for fifteen
minutes. After any key is pressed (or five seconds) the display will return to normal mode.
WA R N I NG S I L E N C E D
F O R 1 5 M I N U T E S
Figure 3-9 Warning Silenced message
3.1.6 Trouble Status Display
If a sensor indicates a trouble, or the panel detects an internal fault, the panel will enter TROUBLE mode during
which the internal buzzer will sound, the power lamp will be yellow and the LCD will show the problem.
T R O U B L E
C O S E N S O R 0 2
Figure 3-10 Trouble display
The display will cycle through all trouble indications, at five seconds per display. Pressing any key (except
HUSH) will advance the display to the next trouble indicator.
If an external horn and/or strobe are connected and configured to signal a trouble condition, they will also sound
when a trouble condition occurs, after a delay if that configuration option is used.
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When the HUSH key is pressed, the internal buzzer will be silenced for eight (8) hours. If the horn or strobe
turn on delays have not finished then they will also be silence. If the delays have finished, the HUSH key must
be held for three (3) seconds in order to silence the horn and strobe.
When all indicators have been silenced, the display will show that trouble indications have been silenced for
eight hours. After five seconds (or any key press), the display will return to normal mode.
T R O U B L E S I L E N C E D
F O R 8 H O U R S
Figure 3-11 Trouble Silenced message
3.2 Ventilation control
The ventilation control function operates independently from the alarm function. It provides the ability to
configure the DVP-120 for control of one to three zones. Each zone can respond to gas levels indicated by one
or more of the three types of sensors, with configurable turn on and turn off concentrations for each gas type.
Each zone can also be controlled based on the time of day and/or two of the sensor types.
Each zone can be configured to control one, two or all three of the relays and the external horn and strobe if
desired. When more than one zone is controlling a relay it only takes one zone to activate the relay, but all
controlling zones must release the relay before it will turn off.
Each of the relays, horn and strobe have independent turn on delays (to ignore short duration transients) and
turn off delays (to ensure minimum run times for fans that must run for internal cooling).
3.2.1 Zone Signal Display
When a zone is controlling the horn or strobe and they turn them on, the panel will enter ZONE SIGNAL mode
during which the horn and/or strobe will be turned on and the LCD will show the zone that is signaling.
Z O N E S I G N A L
Z O N E 1
Figure 3-12 Zone Signal display
The display will cycle through all zones that are controlling the horn or strobe and are signaling, at five seconds
per display. Pressing any key (except HUSH) will advance the display to the next zone that is signaling.
When the HUSH key is held for three (3) seconds, the horn and/or strobe will be silenced for fifteen (15)
minutes. When silenced, the display will show that zone signals have been silenced for fifteen minutes. After
any key is pressed (or five seconds) the display will return to normal mode.
Z O N E S I L E N C E D
F O R 1 5 M I N U T E S
Figure 3-13 Zone Signal Silenced message
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3.3 Setting the System Configuration
The configuration menus can be entered from normal mode by pressing the MENU key. While in configuration
mode, the user can review all configuration parameters to check the current operating conditions.
As an aid when configuring the control panel, the first entry in the top menu summarizes the number of sensors
and relays that the panel is currently recognizing.
5 S E N S O R S F O U N D
3 R E L A Y S F O U N D
Figure 3-14 Hardware Summary
The MENU key is also used to return to a higher-level menu and finally exit the configuration menus back to
normal mode.
When exiting from the menu system to normal mode, if any configuration changes have been made, the panel
will ask whether changes are to be saved,
S a v e C o n f i g . ?
( 0 = N O , 1 = Y E S )
Figure 3-15 Save Configuration? Prompt
Pressing the zero (0) key at this point will cancel all changes except time and day of week. Pressing the one (1)
will save all changes to non-volatile memory, and the changes will then become effective in controlling the
ventilation system.
While the DVP-120 is in the configuration mode, alarm and ventilation control functions continue in the
background with the previously set configuration values. In particular, if an alarm condition is detected the
alarm lamp, the buzzer, the horn and the strobe will operate as configured but the LCD will not display the
detailed information. The HUSH key can be used to silence any alarm, warning or trouble indicators without
having to exit the configuration mode. If the MENU key is used to exit the configuration mode before using the
HUSH key, the LCD will display the cause of the audible indicator.
The numeric keys are used to change the particular parameter displayed. The underlined character, or space, on
each display indicates what will be changed by the digit keys.
The left and right cursor keys will enter the particular submenu and scroll through the items of the same type
where appropriate, e.g. enter the Configure Sensors submenu and scroll through the parameter lists for the
existing sensors.
The up cursor key scrolls through the menu entries in the order listed here, while the down cursor key scrolls in
the reverse order.
Changing the configuration parameters requires the entry of a password before changes can be made. The
password is 1234. See Figure 3-22 for an example of the password prompt.
In many cases the parameter is entered as a string of digits, but some parameters are selected by pressing a
single key, e.g. pressing 1 selects Monday, 2 selects Tuesday, etc.
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3.3.1 System Menu
The top menu level allows the user to select:
–
–
–
–
–
Configure System
Configure Sensors
Configure Relays, Horn & Strobe
Configure Zones
Configure Signals
The up and down cursor keys can be used to scroll through the entries in the list, while the left or right key will
enter the particular submenu.
The MENU key will return to normal mode, at which time the changes are saved in non-volatile memory
and become effective in controlling the ventilation system and for alarm level detection.
3.3.2 Configure System Submenu
The system configuration submenu provides entries to:
–
–
–
Set the time of day, 24 hour format
Set the day of the week, day 1 is Monday
Load Default Configuration
3.3.2.1 Set Time of Day
T i m e : 2 2 : 5 5
D a y : T u e s d a y
Figure 3-16 Set Time of Day
This display example shows that the time is 22:55 (10:55 PM). The underlined characters indicate that the
numeric keys can be used to set the current time of day. When the first digit is entered (and after the password is
entred if required), the display will change to show that the hours portion of the time is currently being entered.
T i m e : 0 1 : 5 5
D a y : T u e s d a y
Figure 3-17 Enter Hours
In this example the first digit entered was 1 (one), and the panel is waiting for the second digit of hours to be
entered. If the second digit is not entered within five seconds, the time will revert to the previous value. After
the second digit of the hours is entered, the display will prompt for the minutes entry:
T i m e : 1 6 : 5 5
D a y : T u e s d a y
Figure 3-18 Enter Minutes
In this example, the hours (16) have been accepted and the panel is waiting for the minutes to be entered. If no
digits are entered for 5 seconds the entry will be finished without changing the minutes, however the hours will
be changed to the value entered.
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3.3.2.2 Set Day of Week
T i m e : 2 2 : 5 5
D a y : 2 T u e s d a y
Figure 3-19 Set Day of the week
This display example shows that Tuesday is the current day of the week. The underline character indicates that
the day can be changed by entering the corresponding digit:
–
–
–
–
–
–
–
1
2
3
4
5
6
7
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
3.3.2.3 Load Default Configuration
1 L o a d D e f a u l t
C o n f i g u r a t i o n
Figure 3-20 Load Default Configuration
When the one (1) digit is pressed, the panel will prompt for the password, even if it has been entered previously.
If the password is entered correctly, the panel will overwrite the existing configuration with the default
configuration. This operation is intended to restore the panel to a known basic condition if it is removed from
one installation and installed in another.
The default configuration is:
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
Password
Sensors
1234
Undefined
Alarm levels
Alarm signals
Warning signals
Trouble signals
Warning Levels
Sensor Range
Relay 1
Relay 2
Relay 3
Horn
Strobe
CO = 200 ppm, HS = 5.0ppm, EX = 4,000 ppm
Buzzer = Intermittent, Horn = Intermittent, Strobe = Continuous
Buzzer = Double Tap, Horn = Off, Strobe = Off
Buzzer = Triple Tap, Horn = Off, Strobe = Off
CO = 200 ppm, HS = 5.0 ppm, EX = 4,000 ppm
CO = 200ppm, HS = 6.0 ppm, EX = 10,000 ppm
Normally off, 1 minute turn on delay, 1 minute minimum on time
Normally off, 1 minute turn on delay, 1 minute minimum on time
Normally off, 1 minute turn on delay, 1 minute minimum on time
Normally off, 1 minute turn on delay, 0 (zero) minimum on time
Normally off, 1 minute turn on delay, 0 (zero) minimum on time
Controls nothing, no sensors assigned, Voting mode, Quorum = 1
Controls nothing, no sensors assigned, Voting mode, Quorum = 1
Controls nothing, no sensors assigned, Voting mode, Quorum = 1
Zone1
Zone2
Zone3
Rising Trip Levels CO = 100 ppm, HS = 2.5ppm, EX = 2,000 ppm
Falling Trip Levels CO = 50 ppm, HS = 1.2 ppm, EX = 1,000 ppm
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3.3.2.4 Enter Password
P a s s w o r d
* * * *
Figure 3-21 Enter Password
?
This display shows that the password is 4 digits long. When the first digit is entered, the panel will
show.
P a s s w o r d
_ _ _ 1
Figure 3-22 Password Prompt
?
?
If the password is not entered correctly the panel will display
W r o n g P a s s w o r d
Figure 3-23 Wrong Password Prompt
Once the current password has been entered, the panel will prompt for the configuration parameter
being changed.
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3.3.3 Configure Sensors Submenu
There is a list of parameters for each sensor in the system, either currently wired or configured but presently
disconnected. The left and right cursor keys can be used to move from one sensor to another; doing so always
goes to the first display (summary). The up and down keys will scroll through the parameters for the particular
sensor.
3.3.3.1 Sensor Summary
S e n s o r 0 1
A : 2 0 0 W :
C O
5 0
Figure 3-24 Sensor Summary
This display example shows that the sensor on channel 01 has been configured as a Carbon Monoxide sensor
with an Alarm level of 200 ppm and a Warning level of 50 ppm.
Notice that the sensor number, 01 in this example, is underlined. This indicates that the digit keys can be used to
jump to a particular channel, even if there is no sensor connected to the channel. When the first digit is entered,
the display will prompt for the sensor to show.
3.3.3.2 Sensor Type
S e n s o r 0 1
T y p e : 1
C O
Figure 3-25 Sensor Type
This display example shows that the sensor on channel 01 has been configured as a Carbon Monoxide sensor.
The valid entries for the sensor type are:
–
–
–
–
1
2
3
0
Carbon Monoxide
Nitrogen Dioxide
Combustible
None
(CO)
(NO2)
(EX)
(---)
Setting the sensor type to 0 (zero) will cause the display to ask if the user wants to DELETE the sensor. If the
answer is yes, the configuration record for this sensor channel will be deleted and the channel will no longer be
used to control the ventilation system. If a sensor indicates trouble (or there are wiring problems on a channel),
this will stop any annoying trouble signals for this channel.
When a sensor’s type is changed, the alarm level, warning level and range will be set to the default for the
sensor type.
The following three parameters are not accessible until a sensor type of 1, 2 or 3 is selected.
3.3.3.3 Alarm Set Point
S e n s o r 0 1
A l a r m :
C O
_ 2 0 0 p p m
Figure 3-26 Sensor’s Alarm Level
The default alarm levels for the sensors are:
–
–
–
Carbon Monoxide
Nitrogen Dioxide
Combustible
200 ppm
5.0 ppm
4,000 ppm (10% LEL for methane)
Setting an alarm level of 0 (zero) will disable alarm detection for this particular sensor.
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3.3.3.4 Warning Set Point
S e n s o r 0 1
C O
W a r n i n g : _ _ 5 0 p p m
Figure 3-27 Sensor’s Warning Level
The default warning levels for the sensors are:
–
–
–
Carbon Monoxide
Nitrogen Dioxide
Combustible
50 ppm
3.0 ppm
2,000 ppm (5% LEL for methane)
Setting a warning level of 0 (zero) will disable warning detection for this particular sensor.
3.3.3.5 Range
S e n s o r 0 1
R a n g e :
C O
_ 2 0 0 p p m
Figure 3-28 Sensor’s Range
The range for each sensor is the gas concentration that corresponds to the 20 mA signal level.
The default range values for the sensors are:
–
–
–
Carbon Monoxide
Nitrogen Dioxide
Combustible
200 ppm
6.0 ppm
10,000 ppm (25% LEL for methane)
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3.3.4 Configure Relays, Horn & Strobe Submenu
There is a list of parameters for each relay in the system. The left and right cursor keys can be used to move
from one relay, horn or strobe to another. Doing so always goes to the first (summary) display. The up and
down keys will scroll through the parameters for the particular relay, horn or strobe.
3.3.4.1 Relay Summary
R e l a y 1 N o r m . O f f
D e l a y O n , M i n . O n
Figure 3-29 Relay Summary
This display example shows that Relay 1 is configured to operate Normally Off, with a turn on delay and a
minimum on time.
Notice that the relay number, 1 in this example, is underlined. This indicates that the digit keys can be used to
jump to a particular relay, horn or strobe. The relays are numbers 1, 2 and 3; the horn is number 4 and the strobe
is 5.
3.3.4.2 Relay Mode
R e l a y 1 N o r m . O f f
M o d e : 2
Figure 3-30 Relay Mode
This display example shows that relay 1 is configured to operate in the Normally Off mode. The relay modes
are:
–
–
–
1
2
3
ALARM
Normally Off (default)
Normally On
Relay mode 1 is a special case. This mode is only available on relay 1 and dedicates the relay to function as an
alarm signal to a subsequent alarm or monitoring panel. This mode forces the relay to normally off mode with
no turn on delay or minimum on time. See section 3.1.4 for more detail regarding alarms
Fail Safe operation can be implemented by configuring a relay to operate Normally On, and wiring the circuit
using the NC (normally closed) contact. In this way, if the control panel looses power the relay will turn on the
controlled device if it still has power.
3.3.4.3 Relay Turn On Delay
R e l a y 1 D e l a y O n
( mm : s s ) 0 1 : 0 0
Figure 3-31 Turn On Delay
The default turn on delay is one minute and the maximum allowed value is fifteen minutes. The value is entered
in two groups, 2 digits for the minutes and then 2 digits for the seconds. A leading zero must be entered for each
group if applicable.
3.3.4.4 Relay Minimum On Time
R e l a y 1
M i n . O n
( mm : s s ) 0 1 : 0 0
Figure 3-32 Minimum on time
The default minimum on time is one minute and the maximum allowed value is fifteen minutes.
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3.3.5 Configure Horn Submenu
The configuration parameters for the horn are the same as those for relays. A horn would not normally require a
minimum on time but this parameter allows a more versatile configuration.
3.3.5.1 Horn Summary
H o r n 4
N o r m . O f f
D e l a y O n
Figure 3-33 Horn Summary
This display example shows that the horn has been configured to operate Normally Off, with a turn on delay
and no minimum on time.
Notice that the horn number, 4, is underlined. This indicates that the digit keys can be used to jump to a
particular relay, horn or strobe. The relays are numbers 1, 2 and 3; the horn is number 4 and the strobe is 5.
3.3.5.2 Horn Mode
H o r n
N o r m . O f f
M o d e : 2
Figure 3-34 Horn Mode
This display example shows that the horn is configured to operate in the Normally Off mode. The valid modes
are:
–
–
2
3
Normally Off (default)
Normally On
3.3.5.3 Horn Turn On Delay
H o r n
D e l a y O n
( mm : s s ) 0 1 : 0 0
Figure 3-35 Horn Turn On Delay
The default turn on delay is one minute and the maximum allowed value is fifteen minutes.
3.3.5.4 Horn Minimum On Time
H o r n
M i n . O n
( mm : s s ) 0 0 : 0 0
Figure 3-36 Horn Minimum on time
The default minimum on time is zero and the maximum allowed value is fifteen minutes.
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3.3.6 Configure Strobe Submenu
The configuration parameters for the strobe are the same as those for relays. A strobe would not normally
require a minimum on time but this parameter allows a more versatile configuration.
3.3.6.1 Strobe Summary
S t r o b e 5 N o r m . O f f
D e l a y O n
Figure 3-37 Strobe Summary
This display example shows that the strobe has been configured to operate Normally Off, with a turn on delay
and no minimum on time.
Notice that the strobe number, 5, is underlined. This indicates that the digit keys can be used to jump to a
particular relay, horn or strobe. The relays are numbers 1, 2 and 3; the horn is number 4 and the strobe is 5.
3.3.6.2 Strobe Mode
S t r o b e
M o d e : 2
N o r m . O f f
Figure 3-38 Strobe Mode
This display example shows that the strobe is configured to operate in the Normally Off mode. The valid modes
are:
–
–
2
3
Normally Off (default)
Normally On
3.3.6.3 Strobe Turn On Delay
S t r o b e
D e l a y O n
( mm : s s ) 0 1 : 0 0
Figure 3-39 Strobe Turn On Delay
The default turn on delay is one minute and the maximum allowed value is fifteen minutes.
3.3.6.4 Strobe Minimum On Time
S t r o b e
M i n . O n
( mm : s s ) 0 0 : 0 0
Figure 3-40 Strobe Minimum on time
The default minimum on time is zero and the maximum allowed value is fifteen minutes.
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3.3.7 Configure Zones Submenu
The DVP-120 ventilation control can support up to three zones. The zone functionality makes the DVP-120
very flexible. For example, each zone can be configured to monitor a separate set of 4 sensors and control a
single relay.
Another control scheme uses one zone to monitor all sensors and turn one relay on at a relatively low gas
concentration. A second zone monitors the same sensors and turns on a second relay if the gas concentration
reaches a higher level. The third zone can also monitor the same relays turning the last relay on as a signaling
device to a live monitor station, as well as turning on the external horn and strobe, under the assumption that the
ventilation system is not working.
In addition to controlling the relays based on the gas concentration, each zone can have a timed function, e.g.
turn on low volume ventilation fans at 7:00 AM and turn them off at 8:00 PM.
3.3.7.1 Zone Controls
Z o n e 1 C o n t r o l s
R 1 R 2 R 3 H 4 S 5
Figure 3-41 Zone Controls
This display example shows that Zone 1 is configured to control all of the relays plus the horn and the strobe.
Each of the relays, the horn and the strobe can be removed from (or added to) the zones control by pressing the
indicated digit key. By default, all three zones are configured not to control any devices. When a new panel is
first powered up this display will not show the digits, only the underlined positions.
The digit controls are:
–
–
–
–
–
1
2
3
4
5
Relay 1 added/removed form the zone’s control
Relay 2 added/removed form the zone’s control
Relay 3 added/removed form the zone’s control
Horn added/removed form the zone’s control
Strobe added/removed form the zone’s control
When controlled by a zone the default horn pattern is the Triple Tap pattern, see 3.3.8.7 and the strobe will turn
on continuously when a zone is controlling them.
Each zone can have up to three control groups defined. Each group either monitors a sensor type or implements
a timer function.
3.3.7.2 Zone Group Mode
Z 1 G r o u p 1
S e n s o r T y p e : 2
Figure 3-42 Zone Group Type
N O 2
This display example shows that group 1 in zone 1 will be monitoring Nitrogen Dioxide sensors. The valid
Modes are:
–
–
–
–
0
1
2
3
Timed
Carbon Monoxide (CO)
Nitrogen Dioxide (NO2)
Combustible (EX)
Timed mode turns the zone’s outputs on at the START TIME if the current day is a weekday (or a weekend)
and turns them off at the next occurrence of STOP TIME. The other three modes turn the outputs on if the gas
concentration indicated by that type of sensor is at or above the Rising Trip Point and turns the outputs off if the
concentration is less than or equal to the Falling Trip Point.
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3.3.7.3 Timed Day Selection
Z 1 G r o u p 1 T i m e d
D a y s : 1 W e e k d a y s
Figure 3-43 Timer Days Selection
Valid entries are:
–
–
1 Weekdays, Monday thru Friday, (default)
2 Weekends, Saturday and Sunday
3.3.7.4 Start Time
Z 1 G r o u p 1 T i m e d
S t a r t T i m e : 0 7 : 0 0
Figure 3-44 Start Time Selection
The start time is entered in 24-hour format and the default value is 07:00 (7:00 AM).
3.3.7.5 Stop Time
Z 1 G r o u p 1 T i m e d
S t o p T i m e : 1 8 : 0 0
Figure 3-45 Stop Time Selection
The stop time is entered in 24-hour format and the default value is 18:00 (7:00 PM).
3.3.7.6 Sensor Selection
Z 1 G r o u p 1
N O 2
S e n s o r s : 0 2 , 0 4 , 1 1
Figure 3-46 Sensor Selection
Sensors are included or removed from the group by entering the two-digit channel number. After a sensor is
added or removed the list will be re-sorted so it does not matter in which order the sensors are added or
removed. The default is to include all sensors of the specified type.
When the first digit of a sensor number is entered (a leading zero must be entered if the number is less than ten),
the display will prompt to Add or Remove a sensor from the group.
Z 1 G r o u p 1
N O 2
A d d / R e m o v e : _ 0
Figure 3-47 Add/Remove sensor prompt
When the second digit is entered, the sensor will be added or removed from the control group, provided the
sensor is of the proper type, NO2 in this example. If the sensor is of the wrong type, or an invalid sensor
channel number is entered the request will be simply ignored.
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3.3.7.7 Rising Trip Point
Z 1 G r o u p 1
R i s i n g :
N O 2
2 . 5 p p m
Figure 3-48 Rising Trip Point Entry
The default rising trip points are:
–
–
–
Carbon Monoxide 100 ppm
Nitrogen Dioxide
Combustible
2.5ppm
2,000 ppm
3.3.7.8 Falling Trip Point
Z 1 G r o u p 1
F a l l i n g :
N O 2
1 . 0 p p m
Figure 3-49 Falling Trip Point Entry
The default falling trip points are:
–
–
–
Carbon Monoxide
Nitrogen Dioxide
Combustible
50 ppm
1.2 ppm
1,000 ppm
3.3.7.9 Multiple Sensor Mode
Z 1 G r o u p 1
N O 2
M o d e :
2
V o t i n g
Figure 3-50 Sensor Mode Selection
When multiple sensors are being monitored by a group the output decision can be based on either voting, as
shown here, or the average of all sensors in the group. Valid modes are:
–
–
1
2
Average
Voting
When the configuration is Average, the gas concentrations from all sensors in the group are averaged and if the
average is greater than or equal to the rising trip point the zone outputs(s) are activated. When the average is
less than or equal to the falling trip point the zone output(s) are de-activated. If the average is between the two
trip points, the outputs remain in there previous state.
When the configuration is Voting, the number of sensors in the group indicating a value greater than or equal to
the rising trip point is counted. If the count is greater than or equal to the quorum then the zone output(s) are
activated. If the count of sensors indicating less than or equal to the falling trip point is greater than or equal to
the quorum the zone output(s) are de-activated. Activating the output(s) is given priority if a group has an equal
number of sensors with gas readings ? the rising trip point and sensors with readings ? the falling trip point.
3.3.7.10 Multiple Sensor Quorum
Z 1 G r o u p 1
Q u o r u m : _ 2
N O 2
Figure 3-51 Quorum Entry
It is up to the installer to ensure that the quorum entry is appropriate for the configuration. Valid entries are one
to twelve, but a value greater than the number of sensors being monitored by the group, stops the group from
controlling the outputs.
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3.3.8 Configure Signals Submenu
The DVP-120 can drive the buzzer, horn and strobe with different sound patterns to indicate the severity of the
current conditions. These patterns are selectable by the installer using this group of submenus. Once again, the
left and right keys will scroll through the signal types and the up and down keys will scroll to the signal sources.
3.3.8.1 Alarm Signal Summary
The alarm signals are in response to one or more sensors indicating gas levels at or above the sensors’
configured alarm level.
A l a r m S i g n a l s
B u z z , H o r n , S t r o b e
Figure 3-52 Alarm Signals
This display example shows that alarms are signaled by the internal Buzzer, the external horn and the strobe.
3.3.8.2 Alarm Buzzer Signal
A l a r m S i g n a l s
B u z z : 2 I n t e r m i t .
Figure 3-53 Buzzer Alarm Signal
This display example shows that the buzzer will signal an alarm condition with an intermittent signal. The
signal definitions are:
–
–
–
–
–
1
2
3
4
5
Continuous
Intermittent, one second on at two second intervals (default)
Double Tap, two beeps at 5 second intervals
Triple Tap, three short beeps at 15 second intervals
Off, buzzer will not sound
3.3.8.3 Alarm Horn Signal
A l a r m S i g n a l s
H o r n : 2 I n t e r m i t .
Figure 3-54 Horn Alarm Signal
This display example shows that the buzzer will signal an alarm condition with an intermittent signal. The
signal definitions are:
–
–
–
–
–
1
2
3
4
5
Continuous
Intermittent, one second on at two second intervals (default)
Double Tap, two beeps at 5 second intervals
Triple Tap, three short beeps at 15 second intervals
Off, horn will not sound
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3.3.8.4 Alarm Strobe Signal
A l a r m S i g n a l s
S t r o b e : 1 C o n t i n .
Figure 3-55 Strobe Alarm Signal
This display example shows that the strobe will signal an alarm condition with a continuous signal. The signal
definitions are:
–
–
–
–
–
1
2
3
4
5
Continuous (default)
Intermittent, one second on at two second intervals
Double Tap, two beeps at 5 second intervals
Triple Tap, three short beeps at 15 second intervals
Off, strobe will not flash
3.3.8.5 Warning Signal Summary
The warning signals are in response to one or more sensors indicating gas levels at or above the sensors’
configured warning level.
W a r n i n g S i g n a l s
B u z z
Figure 3-56 Warning Signals
This display example shows that warnings are signaled by the internal Buzzer only.
3.3.8.6 Warning Buzzer Signal
W a r n i n g S i g n a l s
B u z z : 5
O F F
Figure 3-57 Buzzer Warning Signal
This display example shows that the buzzer will not signal a warning condition. The signal definitions are:
–
–
–
–
–
1
2
3
4
5
Continuous
Intermittent, one second on at two second intervals
Double Tap, two beeps at 5 second intervals
Triple Tap, three short beeps at 15 second intervals
Off, buzzer will not sound (default)
3.3.8.7 Warning Horn Signal
W a r n i n g S i g n a l s
H o r n : 5
O F F
Figure 3-58 Horn Warning Signal
This display example shows that the horn will not signal a warning condition. The signal definitions are:
–
–
–
–
–
1
2
3
4
5
Continuous
Intermittent, one second on at two second intervals
Double Tap, two beeps at 5 second intervals
Triple Tap, three short beeps at 15 second intervals
Off, horn will not sound (default)
3.3.8.8 Warning Strobe Signal
W a r n i n g S i g n a l s
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S t r o b e : 5
O F F
Figure 3-59 Strobe Warning Signal
This display example shows that the strobe will not signal a warning condition. The signal definitions are:
–
–
–
–
–
1
2
3
4
5
Continuous
Intermittent, one second on at two second intervals
Double Tap, two beeps at 5 second intervals
Triple Tap, three short beeps at 15 second intervals
Off, strobe will not flash (default)
3.3.8.9 Trouble Signal Summary
The trouble signals are in response to one or more sensor faults, either as a defined current level, or because of
wiring problems
T r o u b l e S i g n a l s
B u z z
Figure 3-60 Trouble Signals
This display example shows that troubles are signaled by the internal Buzzer only.
3.3.8.10 Trouble Buzzer Signal
T r o u b l e S i g n a l s
B u z z : 4
T r i p l e
Figure 3-61 Buzzer Trouble Signal
This display example shows that the buzzer will signal a trouble condition with a triple tap signal. The signal
definitions are:
–
–
–
–
–
1
2
3
4
5
Continuous
Intermittent, one second on at two second intervals
Double Tap, two beeps at 5 second intervals
Triple Tap, three short beeps at 15 second intervals (default)
Off, buzzer will not sound
3.3.8.11 Trouble Horn Signal
T r o u b l e S i g n a l s
H o r n : 5
O F F
Figure 3-62 Horn Trouble Signal
This display example shows that the horn will not signal a trouble condition. The signal definitions are:
–
–
–
–
–
1
2
3
4
5
Continuous
Intermittent, one second on at two second intervals
Double Tap, two beeps at 5 second intervals
Triple Tap, three short beeps at 15 second intervals
Off, horn will not sound (default)
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3.3.8.12 Trouble Strobe Signal
T r o u b l e S i g n a l s
S t r o b e : 5 O F F
Figure 3-63 Strobe Trouble Signal
This display example shows that the strobe will not signal a trouble condition. The signal definitions are:
–
–
–
–
–
1
2
3
4
5
Continuous
Intermittent, one second on at two second intervals
Double Tap, two beeps at 5 second intervals
Triple Tap, three short beeps at 15 second intervals
Off, strobe will not flash (default)
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4 Troubleshooting
The DVP-120 is extensively tested at the factory to ensure reliable operation. Most problems can be traced to
the set-up of configurable features and modes, system wiring or trouble with the sensors.
4.1 System Status Light Flashing
The system status light (section 3.1.1) is normally green indicating power is present, but will change to yellow
whenever the controlling firmware detects a trouble condition. Possible trouble conditions are
–
–
–
–
Any configured channel has less than 4 mA flowing in the current loop
A sensor is reporting a trouble condition
Any configured channel wiring is open.
Internal controller board problems are detected.
4.1.1 Input Channel Trouble
Any time the POWER light is yellow, the first thing the technician should consider is that one of the input
channels is in trouble. Reviewing the Sensor Status displays (using the up and down keys), should reveal which
channel has a problem since the gas reading will be replaced with the word TROUBLE.
A common source of trouble is an input channel that is configured for a sensor that does not exist. In this case,
the system expects to see current flowing within the current loop, but there cannot be current if there is no
sensor connected. Either fix the miss-wired sensor, or change the sensor type to NONE, section 3.3.3.2. After
returning to normal mode (using the MENU key), the power light should return to steady green.
If all channels are configured properly, another source of trouble could be the type of sensor attached to an input
channel. Macurco Toxic sensors can indicated high gas concentrations with signals of up to 24 mA in the
current loop. However, the combustible sensor (GT-11A) can indicate trouble with a 21 mA signal. Therefore, a
Toxic sensor connected to channel which is configured for a combustible sensor can cause a fault indication if
the gas concentration is high enough.
All Macurco sensors are either supplied with a STATUS lamp that will indicate the health of the device, or will
display a trouble message on the digital display. Macurco sensors may be tested by depressing the TEST button
on the sensor printed circuit board, or (depending on the type of sensor), the button on the interior front panel of
the unit. Macurco sensors will step the output current level from 4 mA to 20 mA over the course of the warm-up
period, allowing the technician to determine where the trouble exists. If the sensor is still in trouble, resetting
the power may clear the trouble. Remove one of the power wires from the sensor terminal strip causing the
sensor to go through a power-up reboot.
Finally, the wiring between the DVP-120 and the sensor should be investigated. The power input to the sensor
should be investigated at the sensor. Since Macurco sensors are rated for operation between 12 and 24 VDC or
VAC, the voltage drop between the DVP-120 and the sensor should not be an issue if the wiring guidelines in
Table 2-2 are followed. A multimeter can be inserted to check the current flow within the loop, or a continuity
test can be performed on all four wires between the DVP-120 and the sensor. Ensure power is removed from the
DVP-120 prior to removing the input or output connectors from the DVP-120 controller board.
Each sensor channel is provided with a PTC-resettable fuse internal to the DVP-120 to protect against over
current situations. To reset a sensor channel, power should be removed from the channel. This can be
accomplished by removing power from the sensor – causing the loop current to go to zero, or by completely
removing power from the DVP-120.
4.1.2 Internal Controller Board Trouble
If the sensor status display and investigative efforts reveal no problems with the input channel current loops and
channel configuration, the most likely trouble is an internal problem detected by the DVP-120 controller. In this
case, contact the Macurco Technical Department for advice and help.
4.2 Timed ventilation problem
When using the timed ventilation mode the system clock should be checked regularly (at least twice a year).
The battery backed real time clock in the DVP-120 does not adjust for daylight saving time so the spring and
fall switch over points are good choices to check the system clock.
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4.3 No Power
WARNING
120/240 VAC terminals are located within the DVP-120,
presenting a hazard to service technicians. Only qualified
technicians should open the DVP-120 case and service the
internal circuits. Ensure power is removed from the DVP-120
prior to servicing the unit.
The DVP-120 starts up as soon as power is applied to the microcontroller, and the DVP-120 is designed to have
power continuously applied to the unit. An external indication of successful power application to the unit is the
immediate operation of the Status Lamps grouped around the LCD. If the operator does not see immediate
response from the status lamps, power should be checked at J4 (refer to Figure 1-2 for connector locations).
If the correct voltage is noted at J4, then the internal fuse of the DVP-120 should be investigated. The DVP-120
is protected from over-current and transient situations by the fuse at F3. AFTER removing power from the
DVP-120, F3 can be checked by removing the safety cover. If necessary, replace F3 with a 5x20 mm SLO-BLO
fuse with a rating of 1 Amp 250V, e.g. Littlefuse P/N 218001. Be sure to REPLACE THE SAFETY COVER on
F3 before re-applying power to the DVP-120.
4.4 LCD Display unreadable
It is possible that the LCD is unreadable due to temperature or aging of the control panel. If this is the case the
following steps should rectify the problem:
4.4.1 Hold the MENU key for three (3) seconds.
After three seconds, the power led will turn red. After a further two seconds, the LCD backlight will also be
turned off.
4.4.2 Press the UP and DOWN cursor keys to change the LCD contrast.
Each press of the UP or DOWN cursor key will change the contrast by a step in that direction. Adjust the
contrast for best viewing.
4.4.3 Press any other key to exit the contrast-setting mode.
4.5 The Keypad does not respond (LCD shows KEYS LOCKED)
The keypad can be unlocked by holding the zero (0) key for three seconds. At which time the backlight will turn
on and the display will return to normal mode..
The keypad can again be locked by holding the zero key for three seconds, until the display shows KEYS
LOCKED.
4.6 After a power failure
After any power failure, the user should check the system clock. While system parameters are maintained in
non-volatile memory, the system clock is backed-up by a limited-capacity button cell battery. Even though the
button cell can run the clock for several years, it will eventually wear out.
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