ritetemp Thermostat 8050C User Guide

Install guide 8050C  
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ENGLISH  
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Customer Support: 888-515-2585 or  
1-405-061  
Made in China  
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2 Label Wires from Old Unit  
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Switch electricity to the furnace and air conditioner OFF;  
then proceed with the following steps.  
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Remove cover from old thermostat. Most are snap-on types and simply pull off.  
Some have locking screws on the side or front. These must be loosened.  
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Note the letters printed near the terminals.  
Carefully attach labels (enclosed) to each wire. Label the wires one at a time.  
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You must have all the wires labeled before you proceed.  
Read instructions carefully before removing any wiring from existing thermostat. Wires  
must be labeled before they are removed. THERE IS NO STANDARD COLOR CODE.  
When removing wires from their terminals, ignore the color of the wires since these may  
not comply with the standard.  
Caution  
3 Remove old unit  
Remove the wires from the terminals of the old thermostat.  
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Make sure the wires do not fall back inside the wall.  
Wind them around a pencil to keep them from falling.  
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Remove the old thermostat from the wall. Fill wall  
opening with fiber glass insulation to prevent drafts.  
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4 Mount the 8050C  
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Separate front from back of unit. Press up on the  
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catch on the bottom of the thermostat and swing the  
body away from the base, lift up to remove the body  
from the base.  
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Hold the base against the wall, with the wires coming  
through the opening below the terminal block.  
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Position the base for best appearance (If you choose  
to use the optional wall plate, hold the wall plate  
against the wall with the wires coming through the  
opening.)  
Terminal  
Block  
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Attach the base to the wall with the two  
screws provided.  
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If you are mounting the base to sheet  
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rock or if you are using the old  
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mounting holes, use the plastic anchors  
provided. Drill a 3/16-in. (4.8mm) hole  
for the insert at each screw location,  
and then mount the base.  
Wall Plate  
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PG  
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5 Gas-Electric Selection  
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REFER to the back of the Control Unit:  
If you have Electric Heat or a Heat Pump you must place the Gas/Electric jumper in the ELECT  
position (thermostat controls the Fan).  
If you have Gas Heat the Gas/Electric Jumper should be in the GAS position (furnace controls  
the Fan).  
6 Heat Pump Switch  
A
G
Y
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RH  
B
O
RC W2  
C
If you have a HEAT PUMP:  
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Change the NORMAL/PUMP  
switch on the back of the unit  
to PUMP.  
f your heat pump has auxiliary  
heat, select the DIFFERENTIAL  
jumper. This controls how often  
your auxiliary heat will come on.  
'2' is most comfort (cold climates)  
'4' is most efficient (warm  
climates)  
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C - F  
jumper  
Differential  
jumper  
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3
4
GAS  
ELECT  
Gas / Electric  
jumper  
12/24hr  
jumper  
The unit must be reset when a  
jumper is changed.  
Normal/Heat Pump  
switch  
Circuit  
Board  
PG 5  
7 Install Batteries  
The 8050C requires batteries to operate your system  
and retain its programming in memory.  
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Switch MODE switch to OFF and the FAN switch to  
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AUTO.  
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Insert 2 AA alkaline batteries according to the  
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TP  
polarity noted in the compartment.  
Press the RESET button to clear the transient  
program memory. Initially, LCD display will go off.  
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NOTE: Replace the batteries when this LOW battery  
indicator appears on the display or once a year.  
With batteries removed, you have approximately  
30sec before your custom programming is lost.  
8 Power Options  
Please be aware of the following power options  
1) The 8050C can run on batteries only. (2AA Alkaline)  
The batteries will last well over 1 year. If the batteries are not replaced the thermostat  
will stop working.  
2) The 8050C can run on the C wire if available.  
(24 VAC ONLY)  
As shown in the wiring diagrams, The C wire is the other side of the 24VAC heating transformer.  
If the C wire is used, the batteries are for AC power loss only and are not required.  
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PG 6  
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9 Wire Connections  
Make sure your wires are labeled. This is necessary to determine which step-by-step  
wiring diagram you should use. This may require you to find the 'other end' connection for  
each wire on your heating or air conditioning equipment and read the label there.  
If you have a Zoned Heating/Cooling system with multiple thermostats, please refer to our  
Before you Connect Wires  
Please refer back to these guidelines for safe and secure wire connections.  
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Take care not to damage the labels for each wire in handling.  
Strip insulation 3/8 in. (9.5mm) from wire ends.  
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Connect labeled wires only to a terminal with corresponding letter.  
Bend the wire slightly, insert the wire under the contact plate and tighten  
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the screw down onto the wire.  
Do not allow  
wires to touch  
Caution  
What Wires Do You Have?  
each other or parts on unit.  
Wires must be routed through  
the hole in the back plate, below  
the terminal block, or they will  
hit parts on the cover.  
The Wire chart shows wire labels used on  
Ritetemp thermostats. Please determine what  
wires you have and select the correct wiring  
diagram to "go to" on pages 9.  
The Wire Chart below will help you determine the terminal connections you will use  
on your new thermostat. See chart section that applies to your heat/cool system.  
OLD THERMOSTAT NEW THERMOSTAT  
DESCRIPTION  
R or RH or 4 or V  
RH or RC(leave jumper) Power Wire  
RH or 4 or V  
RC or R  
W or H  
RH (remove jumper)  
RC (remove jumper)  
W
Power Heat  
Power cool  
Heat return  
Y or M  
G or F  
Y
G
Cool return (compressor)  
Fan return  
C or X  
W2 or H2  
Y2  
W2  
E
C
W2  
AC source for thermostat  
2nd stage of heat  
2nd stage of cool (n/a)  
Heat pump Aux heat  
Do not connect  
do not connect  
W2  
O (see note below)  
B (see note below)  
O
B
Dmpr/Chg-over (pwr in cool)  
Dmpr/Chg-over (pwr in heat)  
5 or R  
4 or W  
6 or Y or B  
RH  
W
A
Power wire (pwr)  
Turn Valve on  
Turn Valve off  
R
Y or B  
W
RH  
W
A
Power wire (pwr)  
Turn Valve off  
Turn Valve on  
Note: On a heat pump, if O and B are both present, connect O to O and tape off B.  
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PG  
8
NOTE: Wires marked with dotted line are optional.  
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Go To Page 11  
Go To Page 12  
Go To Page 13  
Go To Page 14  
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Go To Page 15  
Go To Page 17  
Go To Page 16  
If you do not find the wiring information for your system try our website:  
www.ritetemp-thermostats.com for more information or call our  
customer service at 888-515-2585.  
PG 9  
9 Wire Connections cont  
When you have finished connecting the wires attach control unit to wall  
unit. Hook the top of the body onto the base, swing the body down, and  
snap the body onto the base.  
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Follow these procedures to verify you  
10 Check Unit  
have correctly installed the unit.  
To check HEAT mode:  
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Set the mode switch to HEAT. Set the fan switch AUTO.  
Using the TEMP UP button raise the set point to 90deg.  
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Allow the system 5 min to respond.  
Verify that heat is blowing from the system.  
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TEMP UP  
arrow  
Set the mode switch to OFF.  
To check COOL mode:  
Set the mode switch to COOL.  
Press the TEMP DOWN button to a temp 5 below room  
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temperature.  
Allow the system 5 min to respond.  
Verify that cool air is blowing from the system.  
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TEMP DOWN  
arrow  
Mode Switch  
Fan Switch  
to initialize the new thermostat. REMEMBER, Mode switch must be in HEAT or COOL to operate.  
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PG 10  
2 WIRE  
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Thermostat  
jumper  
wire  
NOTE: Wires marked with  
the dotted line are optional.  
C
W
C
R
W
HEAT  
Power  
HEAT  
FURNACE  
STEP 1 - Connect the R (or RH) wire to the RH terminal on the  
thermostat. This connects to the Heater Power.  
STEP 2 - Connect the W wire to the W terminal on the thermostat. This  
connects the heater control line to the thermostat.  
Your heater is now connected to the thermostat.  
Go To Page 10  
PG 11  
3 WIRE  
Thermostat  
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jumper  
wire  
NOTE: Wires marked with  
the dotted line are optional.  
C
RH  
W
G
Heat  
Power  
Heat  
FAN  
FURNACE  
STEP 1 - Connect the R (or RH) wire to the RH terminal on the  
thermostat. This connects to the Heater Power.  
STEP 2 - Connect the W wire to the W terminal on the thermostat.  
This connects the heater control line to the thermostat.  
STEP 3 - Connect the G wire to the G terminal on the thermostat.  
This connects the Fan to the thermostat.  
Your system is now connected to the thermostat.  
Go To Page 10  
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PG 12  
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4 WIRE  
NON-HEAT PUMP  
Thermostat  
STEP 1 - Connect the Y wire  
to the Y terminal on the  
thermostat. This connects to  
the Cooler compressor.  
jumper  
wire  
STEP 2 - Connect the RH or R wire to the RH  
terminal on the thermostat.  
This connects the Heater/Cooler Power.  
G
RH  
W
Y
Cool  
C
Heat  
Power  
Heat  
FAN  
Comp  
HVAC SYSTEM  
STEP 3 - Connect the W wire to the W terminal  
on the thermostat.  
NOTE: Wires marked with  
This connects to the heater control line.  
the dotted line are optional.  
STEP 4 - Connect the G wire to the G terminal on the Thermostat.  
This connects to the Fan.  
Go To Page 10  
Your HVAC system is now connected to the thermostat.  
PG 13  
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STEP 1 - Remove the Jumper wire.  
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5 WIRE  
NON-HEAT PUMP  
d
Thermostat  
H
R
STEP 2 - Connect the Y wire  
to the Y terminal on the  
C
R
thermostat. This connects to  
the Cooler compressor.  
Remove  
jumper  
wire  
G
W
G
RC  
COOL  
RH  
W
Y
Cool  
STEP 3 - Connect the RH wire to the RH terminal  
on the thermostat. This connects to the Heater  
Power.  
Heat  
FAN  
Comp  
Power  
C
HEAT  
Power  
HVAC SYSTEM  
STEP 4 - Connect the RC wire to the RC terminal  
on the thermostat. This connects to the Cooling  
Power.  
NOTE: Wires marked with  
the dotted line are optional.  
STEP 5 - Connect the W wire to the W terminal on the thermostat.  
This connects to the heater control line.  
STEP 6 - Connect the G wire to the G terminal on the Thermostat.  
This connects to the Fan.  
Go To Page 10  
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PG 14  
NORMAL 2 Stage  
Heat System  
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STEP 1 - Connect the G wire to  
the G terminal on the thermostat.  
This connects the Fan.  
jumper  
wire  
Thermostat  
STEP 2 - Connect the W wire  
to the W terminal. This  
connects the 1st stage heat.  
STEP 3 - Connect the W2 wire to the W2  
terminal. This connects the 2nd stage heat.  
STEP 4 - Connect the R wire to the RH terminal  
on the Thermostat. This connects to the 24vac  
power.  
G
W2  
Two Stage  
Furnace  
R
W
C
FAN  
Two Stage Heat System  
NOTE: Wires marked with  
the dotted line are optional.  
Your HVAC system is now connected to the  
thermostat. (If the system also has AC, connect the Y  
wire to the Y terminal on the thermostat. You may also  
have a RC wire if so remove jumper wire between RH  
and RC and connect the RC wire to the RC terminal.)  
Go To Page 10  
PG 15  
HEAT PUMP  
w/o Auxiliary Heat  
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STEP 1 - Connect the G wire to  
the G terminal on the thermostat.  
This connects the Fan.  
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/o  
jumper  
wire  
Thermostat  
STEP 2 - Add a jumper wire  
between W and Y.  
STEP 3 - Connect the Y wire to  
the Y terminal on the thermostat.  
This connects the Compressor.  
jumper  
wire  
O or B  
G
R
O or B  
Y
C
STEP 4 - Connect the O or B wire to the O or B  
terminal on the thermostat. (If you have both O and B  
wires, use the O and tape off the B.) This connects  
the change over valve.  
24VAC  
Power  
Change  
Over  
Comp  
FAN  
Single Stage HEAT PUMP  
STEP 5 - Connect the R wire to the RC terminal on  
the Thermostat. This connects to the 24vac power.  
NOTE: Wires marked with  
the dotted line are optional.  
Your HVAC system is now connected to the  
thermostat.  
Go To Page 10  
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PG 16  
HEAT PUMP  
with Auxiliary Heat  
STEP 1 - Connect the G wire to  
the G terminal on the thermostat.  
This connects the Fan.  
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jumper  
wire  
STEP 2 - Add a jumper wire  
Thermostat  
between W and Y.  
STEP 3 - Connect the Y wire to  
the Y terminal on the thermostat.  
This connects the Compressor.  
STEP 4 - Connect the O or B wire to the  
jumper  
wire  
O or B  
(not both)  
G
R
O or B  
Y
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O or B terminal on the thermostat. (If you have both  
O and B wires, use the O and tape off the B).  
This connects the change over valve.  
STEP 5 - Connect the R wire to the RC terminal on  
the Thermostat. This connects to the 24vac power.  
STEP 6 - Connect W or W2 to W2 on the thermostat.  
This connects the AUX heat.  
AUX  
Heat  
Change  
Over  
Comp  
FAN  
24VAC  
Power  
HEAT PUMP  
NOTE: Wires marked with  
the dotted line are optional.  
Go To Page 10  
Your HVAC system is now connected to the thermostat.  
PG 17  
8050C Features  
The 8050C can be used with most 24-volt gas, oil or electric heating and air  
conditioning systems, all heat pumps, and gas millivolt heating systems. It cannot be  
used with 120 volt heating systems. Ask The Home Depot for other thermostats  
to control line voltage systems.  
The 8050C is programmable. There are 4 programming periods per day. Each period  
can be programmed separately.  
You can use the built-in time/temperature programs, or alter  
them to suit your schedule. The 8050C separately programs  
each day of the week for both heating and cooling. You can  
easily override the programmed temperatures for as little as one  
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programming period or up to an entire vacation.  
The large backlit liquid crystal display shows time, day of the week, room and set  
temperatures. It will also remind you when the filter should be changed in your blower.  
Temperature swing adjustment lets you fine-tune your system for maximum comfort  
and energy efficiency.  
A 5-minute minimum off time protects your compressor system from being damaged.  
Two "AA" batteries are used to retain your time and temperature programs and to run  
the thermostat.  
PG 18  
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