®
A MIDDLEBY COMPANY
Digital Temperature Controller
(KIT P/N 36939)
Installation, Programming
and Troubleshooting
Instructions
HEAT ON
SET PT
500 F
ACTUAL
TEMP
SP LOCK
OVER TEMP
Kit Contents
Description
On/Off-PID Digital Temperature Controller w/brackets
Installation, Programming, and Troubleshooting Instructions
Operators Instructions
Qty
1
1
Part Number
36056
36622
1
36940
Middleby Marshall Inc. • 1400 Toastmaster Drive • Elgin, IL 60120 • (847) 741-3300 • FAX (847) 741-4406
Middleby Corporation 24 Hour Service Hotline 1-800-238-8444
©1997 Middleby Marshall Inc.
Part # 36622
P 9/97, Rev. B
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Unpacking
The Digital Temperature Controller was checked before leaving the factory. Inspect the shipping container
carefully for evidence of improper handling during shipment. In case of damage, make an immediate claim
to the parts distributor from whom the unit was purchased. If the Digital Temperature Controller was shipped to
you, notify the carrier without delay and file a claim.
The installation process consists of:
• Disconnecting the existing wiring and and removing the existing Temperature Controller.
• Mechanically installing the replacement Digital Temperature Controller.
• Making the appropriate electrical connections.
When the installation is completed, check the Digital Temperature Controller for the desired oven operation. Also,
demonstrate the use of the Digital Temperature Controller for the owner (operator) and leave a copy of the Operating
Instructions (PN 36940).
Disconnecting Existing Wires / Mechanical Installation
The following provides mechanical installation instructions for the Digital Temperature Controller.
WARNING
To avoid electrical shock hazard, shut OFF all
electrical power to the oven at the disconnect
switch or circuit breaker before installing the
Digital Temperature Controller.
To remove the Existing Temperature Controller and to install the latest Digital Temperature Controller, proceed as fol-
lows:
Replacing an Analog Temperature Controller with the latest Digital Controller
Step
1.
Procedure
Disconnect all associated wiring from the terminals located on the rear of the Temperature Controller.
Disconnect and retain any jumper wires. Be sure to tag the ends of controller wires with the number
terminal they connect to. These old numbers will be used later to match them with the new Digital
control terminal numbers as referenced in Table 1.
2.
3.
Unscrew the two bracket screws and remove the bracket securing the control to the oven. Slide the
bracket away from the controller. Remove the controller by pulling it out through the front of the panel.
Go to “Installing the Digital Controller” on next page.
Replacing any Digital Temperature Controller with the latest Digital Controller
Step
1.
Procedure
When converting a Digital Temperature Controller, PN 28071-0027, PN 28071-0028, PN 30871, or PN
36021, to the latest digital controller, tag the wires and replace wire for wire since the terminal connec-
tions are exactly the same. If replacing an existing 360EWB temperature controller, PN 32571, be sure
to tag the mA output terminal wires for proper cross reference to the new controller as called out in
step 4 under “Electrical Connections”.
2.
Remove the two clip style brackets on the top and bottom of the control. Remove the controller by
pulling it out through the front of the panel. See Figure 1.
2
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Installing the Digital Controller
Step
1.
Procedure
Insert the Digital Temperature Controller into the same panel slot making sure the face of the controller
is upright with the display on top and the push buttons on the bottom.
2..
3..
Identify the two rectangular holes on top and bottom of the control case. Attach the two panel mounting
brackets with the clips of the brackets and the heads of the screws pointing towards the rear of the new
controller into these rectangular holes. See Figure 1.
Tighten both screws evenly against the back side of control panel until the controller seats securely.
SIDE VIEW
Electrical Connections
All electrical connections on the Digital Temperature Controller are made on two terminal strips located on the rear of the
controller case. The existing oven wires are connected to the new terminal positions indicated in the analog to digital ter-
minal cross reference in Figure 2.
Proceed as follows to make electrical connections:
1.
2.
Use Figure 2 and Table 1 to identify the electrical connections. Also refer to step 4 if installing the latest
Temperature Controller for the Modulating Configuration used in a 360EWB oven.
If you are replacing an Analog Controller, refer to the discontinued Analog Temperature Controller terminal num-
bers which are shown in brackets ([ ]) next to the matching Digital Controller terminal. NOTE: All wires,
including jumpers, will be reused from the existing temperature controller (analog or digital) with the new
replacement digital temperature controller. CAUTION: DO NOT USE TERMINALS 15 & 16 ON THE “DIGITAL”
TEMPERATURE CONTROLLER OR DAMAGE TO THE CONTROL WILL RESULT!
3.
If you are replacing an existing Digital Temperature Controller with the latest Digital Temperature Controller, PN
36056, then simply ignore the bracketed terminal numbers which pertain to the Analog Controllers only and
reconnect the same wires.
4.
If you are replacing a Modulating Digital Temperature Controller, PN 32571, with the latest digital tempera-
ture control, PN 36056, be aware that the mA output terminals of the Temperature Controller, which feed the
Amplifier Board, change from 4 & 5 to 15 & 16. See Figure 3.
3
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Table 1 - Terminal Cross Reference
TERMINAL ON
NEW MODULE:
TERMINAL ON
OLD MODULE:
500
DESCRIPTION OF TERMINAL
1
2
5
+ T/C
- T/C
8
7
5
500
Input to Temperature
Control Relay
Remove
From
Remove
From
Connect
To
Connect
To
6
Output to High Flame
Solenoid or Heater
Contactors
4
[13]
[14]
[15]
8
9
[1]
[2]
Not used on
certain model
gas and electric
ovens.
7
6
5
4
10
L2
L1
G
Neutral
Power
Ground
L2
L1
11
12
13
14
15
16
NO CONNECTION
}
[16]
[5]
Standard On/Off output
terminals for all models
except 360EWB.
13
Input to Cool-Down
Relay
9
}
[6]
NO CONNECTION
}
}
[L2]
[L1]
[G]
L2
L1
14
Output from Cool-Down
Relay
10
11
12
P.I.D. Output used only
when the temperature controller
is programmed for a model
360EWB with the modulating
gas control system.
15
Input to High-Limit
Relay
16
Output from High-Limit
Relay
Figure 2 - Analog to Digital Terminal
N/A
Modulating Valve Output
Terminals (360EWB ONLY)
15
16
Cross Reference
4-20 Milliamp Connection
Output From Terminals 15 &16
Move wires
at terminals
4 & 5 to 15 & 16
for the model
360EWB only
8
9
10
11
12
13
14
15
7
6
0-24 VDC
4-20 milliamps
5
+
6
5
4
3
4
-
L2
L1
G
Purple
+
- 16
2
1
Purple/White
24V AC
Input
Temperature Controller
Amplifier Board
Modulating Valve
PN 36056
(Kit PN 36939)
Figure 3 - Modulating Control Circuit
4
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5.
Check to be sure the oven’s thermocouple is the latest version flange mount style verses the obsolete version.
See Figure 4 below.
Flange
Current Thermocouple
cable
PS360 (6.00”)
PS200 (13.38”)
Clip
Obsolete Thermocouple
Figure 4 - Current & Obsolete
Thermocouple Comparison.
The obsolete thermocouple is not compatible with the latest temperature controller, p/n 36056, and must be
replaced with the latest thermocouple, kit p/n 33984 (300 Series ovens), and kit p/n 33985 (200 Series ovens).
The obsolete thermocouples leads are grounded to the protective sheathing which causes an error signal with
the latest controller’s thermocouple circuit.
6.
After becoming familiar with the various electrical connections pertaining to the specific model oven and its
temperature controller, refer to table 2 for specific wiring instructions for all wires and any jumpers to be
reinstalled.
NOTES:
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
5
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NOTE
Be sure to replace any jumper wire specified
in the wiring diagram.
Table 2 - Wiring Configurations
Oven Model Number
Related Figure
PS200 Gas Oven, 208-240V, 50/60Hz, 1 Ph, 3W...............................................................Figure 5
PS200 Gas Oven, 200V, 50/60Hz,1 Ph, 2W (Export Only)................................................Figure 5
PS200 Gas Oven, 208V, 50/60Hz,1 Ph, 2W (Export Only)................................................Figure 5
PS200 Gas Oven, 220-240V, 50/60Hz, 1 Ph, 2W (Export Only)........................................Figure 5
PS200 Electric Oven, 208-240V, 50/60Hz 3Ph, 4W
(for models built before December 1996)..................................................Figure 8
(for models built in December 1996 and later)..........................................Figure 9
PS200 Electric Oven, 380V, 50/60Hz, 3Ph, 4W (Export Only)
(for models built before December 1996)...................................................Figure 8
(for models built in December 1996 and later)...........................................Figure 9
PS200 Electric Oven, 400-416V, 50/60Hz, 3Ph, 4W (Export Only)
(for models built before December 1996)..................................................Figure 8
(for models built in December 1996 and later)..........................................Figure 9
PS250 Gas and Electric Ovens with early style..................................................................Figure 7
Analog Controller Part Number 28071-0009
PS250 Gas and Electric Ovens with later style...................................................................Figure 6
Analog Controller Part Number 28071 -0012
PS300/304/350 (All Gas and Electric Ovens are the same)................................................Figure 6
PS310/314/360, 360WB Gas Oven, 208-240V, 50/60Hz,1Ph, 3W......................................Figure 5
PS310/314/360, 360WB Gas Oven, 208-240V, 50/60Hz,1 Ph, 2W (Export Only)..............Figure 5
PS310/314/360, 360WB Gas Oven, 190-380V, 50/60Hz,1Ph, 2W (Export Only)...............Figure 5
PS310/314/360, Electric Oven, 200-220V, 50/60Hz, 3Ph, 3W (Export Only)......................Figure 6
PS310/314/360, Electric Oven, 208-240V, 50/60Hz, 3Ph, 4W.............................................Figure 6
(with Single Phase Blower Motors)
(with 3 Phase Blower Motors)....................................................................Figure 6
PS310/314/360, Electric Oven, 240V, 50/60Hz, 3Ph, 3W....................................................Figure 6
PS310/314/360, Electric Oven, 380V, 50/60Hz, 3Ph, 3W (Export Only).............................Figure 5
PS310/314/360, Electric Oven, 480V, 50/60Hz, 3Ph, 3W....................................................Figure 5
PS310/314/360, Electric Oven, 400-440V, 50/60Hz, 3Ph, 3W (Export Only)......................Figure 5
PS360WB-70 Gas Oven, 208-240V, 50/60HZ, 1Ph, 3W......................................................Figure 10
PS360EWB Gas Oven, 208-240V, 50/60HZ, 1Ph, 3W.........................................................Figure 11
PS570 Gas Oven, All Units.................................................................................................. Figure 9
PS200 Gas CE Oven, All Units.............................................................................................Figure 12
PS200 Electric CE Oven, All Units....................................................................................... Figure 13
PS360/360WB Gas CE Oven, All Units................................................................................Figure 12
PS360/360WB Electric CE Oven, All Units...........................................................................Figure 13
6
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Figure 5 - Wiring Diagram Showing Electrical Connections
(Refer to Table 2)
Figure 6 - Wiring Diagram Showing Electrical Connections
(Refer to Table 2)
Figure 7 - Wiring Diagram Showing Electrical Connections
(Refer to Table 2)
Figure 8 - Wiring Diagram Showing Electrical Connections
(Refer to Table 2)
Figure 9 - Wiring Diagram Showing Electrical Connections
(Refer to Table 2)
Figure 10 - Wiring Diagram Showing Electrical Connections
(Refer to Table 2)
7
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Purple
Purple/White
Figure 11 - Wiring Diagram Showing Electrical Connections
(Refer to Table 2)
Figure 12 - Wiring Diagram Showing Electrical Connections
(Refer to Table 2)
Figure 13
Programming
After the Digital Temperature Control has been properly installed and wired, it is ready to be programmed for either the
standard on/off cycling gas solenoid/electric heating system, or the modulating gas valve system. Then, as requested by
the customer, the controller can be set for set lock configuration, F or C operation, and the display type. This function is
to be done by the authorized technician. See Figure14 Service Instructions for details. NOTE: The temperature con-
troller is pre-programmed for On/Off operation, open set lock, and set point display.
Once the Digital Temperature Control has been service programmed, it then can be operator programmed for set point.
See Figure 15 Operator Instructions for details.
Be sure to thoroughly go over the Operator Instructions with the customer to be sure they are familiar with the new con-
trol. Leave the spare copy of the Operator Instructions, PN 36940, with the customer for their future reference.
A copy is enclosed with the new temperature control.
8
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Digital Temperature Controller
PN 36056
Service instructions
Push the lock key and the service key together to reach SP LOK,
Indicator flashing
+
then use the service key to step through the other functions listed
below.
Indicator not flashing
LOCK SERVICE
Use the arrow keys to change the function settings.
KEY
KEY
Factory settings are as shown below.
HEAT ON
SET PT
HEAT ON
SET PT
ACTUAL
TEMP
HEAT ON
SET PT
HEAT ON
g
E
SET = set point display
ACT = actual temperature
display.
68F
5
no
SET PT
ACTUAL
TEMP
d E F
ACTUAL
TEMP
ACTUAL
TEMP
SP LOCK
OVER TEMP
SP LOCK
OVER TEMP
SP LOCK
SP LOCK
OVER TEMP
OVER TEMP
This function will record the
highest ambient temperature of
the temperature controller;
68ºF/20ºC is the original
reading.
NO = set point
F = degrees Fahrenheit
C = degrees Celsius
unlocked
YES = set point
locked
If the “On/Of” setting is chosen, the
“LyES” display will be bypassed.
This display allows programming the controller for either the
standard ON/OFF mode or the PID (360EWB models) mode for
the modulating gas control system.
or
HEAT ON
y
n F P d
O O
0
SET PT
ACTUAL
TEMP
L E S
b
SP LOCK
OVER TEMP
Confirms that the Pid
(Modulating) setting
has been locked in if
the Pid setting was
chosen.
Push the lock key and the display key to
1)
2)
+
enable the programming function of the
“OnOF or “Pid” temperature control
system.
This display is the BIAS (actual
temperature) adjustment scale
which is Factory set at zero.
The Factory must be consulted
for any adjustments to the
BIAS.
LOCK
KEY
DISPLAY
KEY
OnOF = standard on/off temperature cycling system (gas & electric)
PiD = modulating temperature proportioning system
(gas 360 EWB only)
Figure 14 - Service Instructions
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Digital Temperature Controller
P/N 36056 Operators Instructions
HEAT ON:
Controller calling for heat when lit. High
flame on. Once the oven reaches
temperature the LED will cycle on and
off.
DISPLAY:
Temperature displayed in
degrees Fahrenheit or Celsius
SP LOCK:
HEAT ON
SET PT
N/A to operator
250 F
OVER TEMP
250 F
ACTUAL
TEMP
SET PT: Lit when controller is
displaying set point temperature.
OVER TEMP:
Over Temperature condition when lit.
On above 650ºF(343ºC)
SP LOCK
ACTUAL TEMP: Lit when control is
displaying actual oven temperature
TEMPERATURE KEY:
Use to view actual oven
temperature
SERVICE KEY:
Service use only
UNLOCK KEY:
Used in conjunction with SET POINT
KEY to unlock SET POINT for 60
seconds.
SET POINT KEY:
Used in conjunction with
UNLOCK KEY to unlock SET
POINT for 60 seconds.
UP and DOWN arrow keys:
Used to change the set point.
If SET POINT will not change
and lower display flashes then
see below
+
Press UNLOCK & SET POINT
keys simultaneously to unlock
set point, UP & DOWN keys will
now function for 60 seconds.
Figure 15 - Operators Instructions
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Diagnostic Error Messages
The controller runs background tests during normal operation. If a problem with the background tests occurs, an error
message is shown (flashing) in the Display. These are called Diagnostic Error Messages (Table 3).
Table 3 - Diagnostic Error Messages
Corrective Action
Display
rPLC
Flashes on the display
alternately with
1. Turn Blower Switch OFF for 2
minutes, then Turn Blower Switch
ON.
temperature indicating
that the controller’s
internal diagnostics test
has failed.
2. Replace the controller if the
problem does not clear after repeating
action 1 above three times.
rSET
1. Turn Blower Switch OFF for 2
minutes, then Turn Blower Switch
ON.
Oven temperature has
not reached at least
200˚F(93˚C) within 15
minutes of operation;
2. If problem does not clear, call
the Middleby Cooking Systems
Group (MCSG) for assistance.
usually a result of the
burner not lighting.
1. Check that the thermocouple is
connected to terminals 7 & 8 of the
temperature controller.
2. If connections are good, then check
the continuity of the thermocouple at
room temperature. The resistance
reading should be in the 9 - 20 Ohm
range. Remove & replace an open
thermocouple.
OPEn
Caused by an
open circuit in the
thermocouple circuit.
3. If the thermocouple checks good,
call MCSG for assistance.
1. Check the polarity of the
thermocouple leads; terminal 7 (-)
RED wire & terminal 8 (+) WHITE
wire.
r TC
Reverse polarity of the
thermocouple leads.
2. If polarity connections are
correct replace thermocouple.
Middleby Marshall Inc. • 1400 Toastmaster Drive • Elgin, IL 60120 • (847) 741-3300 • FAX (847) 741-4406
Middleby Corporation 24 Hour Service Hotline 1-800-238-8444
©1997 Middleby Marshall Inc.
Page 11 of 11
Part # 36622
P 9/97, Rev. B
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