ritetemp 8050C User manual

1-405-061
Made in China
Install guide 8050C
Customer Support: 888-515-2585 or
Visit our website www.ritetemp-thermostats.com
HEAT COOL AUTO ON
OFF FAN
HEATCOOLAUTOON
OFFF
AN
ENGLISH

Install guide 8050C
1 Location
Caution
Tools
To avoid electrical shock and to prevent damage to the furnace, air conditioner,
and thermostat, disconnect the power supply before beginning work.
This can be done at the circuit breaker, or at the appliance.
C A U T I O N
ï Your thermostat is a precise instrument.
ï Please handle it with care.
ï Turn off electricity to the appliance before installing or 
servicing thermostat or any part of the system. Do not 
turn electricity back on until work is completed.
ï Do not short (jumper) across electric terminals at control 
on furnace or air conditioner to test the system.
ï This will damage the thermostat and void your warranty.
ï All wiring must conform to local codes and ordinances.
ï This thermostat is designed for use with 24 volt AC and
millivolt systems. The thermostat should be limited to a
maximum of 1.0 amps; higher amperage may cause
damage to the thermostat.
.On replacement installations, mount the new thermostat in place of the  
old one if possible.
.On new Installations, follow the guidelines listed below.
.Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the floor, 
and in a room that is used often.
.Do not install it where there are unusual heating conditions, such as: in  
direct sunlight; near a lamp, radio, television, radiator register, or fireplace;
near hot water pipes in a wall; near a stove on the other side of a wall.
.Do not locate in unusual cooling conditions, such as: on a wall separating 
 an unheated room; or in a draft from a stairwell, door, or window.
.Do not locate in a damp area. This can lead to corrosion that will shorten 
thermostat life.
.Do not locate where air circulation is poor, such as: in a corner or an   
alcove; or behind an open door.
.Do not install the unit until all construction work and painting has been  
completed.
.This thermostat does not require leveling.
You will need #1 Phillips screwdriver (small) and
Drill with 3/16-in. (4.8mm) bit for this installation.
Good
5ft.
(1.5m)
PG 1
PG 2

3 Remove old unit
2 Label Wires from Old Unit
4 Mount the 8050C
.
Separate front from back of unit. Press up on the
catch on the bottom of the thermostat and swing the
body away from the base, lift up to remove the body
from the base.
.
Hold the base against the wall, with the wires coming
through the opening below the terminal block.
.
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.)
.
Attach the base to the wall with the two 
screws provided.
.
If you are mounting the base to sheet 
rock or if you are using the old    
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.
PG 3
PG 4
.
Switch electricity to the furnace and air conditioner OFF;
then proceed with the following steps.
.
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.
.
Note the letters printed near the terminals.
.
Carefully attach labels (enclosed) to each wire. Label the wires one at a time.
You must have all the wires labeled before you proceed.
Remove the wires from the terminals of the old thermostat.
.Make sure the wires do not fall back inside the wall.
.Wind them around a pencil to keep them from falling.
.Remove the old thermostat from the wall. Fill wall
opening with fiber glass insulation to prevent drafts.
Caution
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.
B
G
W
C
RC
W2
OB
RH
WYG
HEATCOOLAUTOON
OFFF
AN
Terminal
Block
Wall Plate
Thermostat Base
A
W2
C
RC
OB
RH
WYG

PG 5
7 Install Batteries
The 8050C requires batteries to operate your system
and retain its programming in memory.
.
Switch MODE switch to OFF and the FAN switch to
AUTO.
.
Insert 2 AA alkaline batteries according to the
polarity noted in the compartment.
.
Press the RESET button to clear the transient
program memory. Initially, LCD display will go off.
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.
5 Gas-Electric Selection
8 Power Options
PG 6
I           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).
If you have a HEAT PUMP:
.
Change the NORMAL/PUMP
 switch on the back of the unit
 to PUMP.
.
I 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)
 The unit must be reset when a
 jumper is changed.
SETCLOCKSDP
FILTER
REVIEW
HOME
TEMPHOLD
COPY
PROGRAM
TIMESLOT
EMERGENCY
TIMESET
RESET
NEXT
P
TIME
TIME
DAY
MODEFAN
AA
AA
BATTERY
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.
AC
W2
RC
O
B
RH
W
Y
G
SHORT C
ON F
SHORT24
OPEN12
NORMAL PUMP
2 3 4
GAS
ELECT
Gas / Electric
jumper Circuit
Board
Differential
jumper
oC -oF
jumper
Normal/Heat Pump
switch
12/24hr
jumper
6 Heat Pump Switch

PG 8
PG 7
Please refer back to these guidelines for safe and secure wire connections.
.
Take care not to damage the labels for each wire in handling.
.
Strip insulation 3/8 in. (9.5mm) from wire ends.
.
Connect labeled wires only to a terminal with corresponding letter.
.
Bend the wire slightly, insert the wire under the contact plate and tighten
the screw down onto the wire.
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.
Before you Connect Wires
What Wires Do You Have?
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
website at www.ritetemp-thermostats.com for installation notes or call 1-888-515-2585.
Caution
Do not allow
wires to touch
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 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 RH (remove jumper) Power Heat
RC or R RC (remove jumper) Power cool
W or H W Heat return
Y or M Y Cool return (compressor)
G or F G Fan return
C or X C AC source for thermostat
W2 or H2 W2 2nd stage of heat
Y2 do not connect 2nd stage of cool (n/a)
W2 W2 Heat pump Aux heat
E Do not connect
O (see note below) O Dmpr/Chg-over (pwr in cool)
B (see note below) B Dmpr/Chg-over (pwr in heat)
5 or R RH Power wire (pwr)
4 or W W Turn Valve on
6 or Y or B A Turn Valve off
R RH Power wire (pwr)
Y or B W Turn Valve off
W A Turn Valve on
ONE Power Wire
TWO Power Wires
ZONED MOTOR VALVES
ZONED SOLENOID VALVES
HEAT PUMPS
Note: On a heat pump, if O and B are both present, connect O to O and tape off B.
For wiring support call 1-888-515-2585 or visit our website at www.ritetemp-thermostats.com
Control wires

PG 10
PG 9
RH
G
Y
W
C
From Furnace
And AC unit
R
or
RC
G
Y
W
C
From Furnace
And AC unit
RH
Go To Page 13 Go To Page 14
Go To Page 12
RH
W
C
From Furnace
G
Go To Page 17
Go To Page 15 Go To Page 16
W
RH
R
or
From Furnace
Go To Page 11
C
or R
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.
C
RC
W2
O B
RH
WYG
HEAT COOLAUTOON
OFFF
AN
10 Check Unit
Follow these procedures to verify you
have correctly installed the unit.
To check HEAT mode:
.
Set the mode switch to HEAT. Set the fan switch AUTO.
.
Using the TEMP UP button raise the set point to 90deg.
.
Allow the system 5 min to respond.
.
Verify that heat is blowing from the system.
.
Set the mode switch to OFF.
To check COOL mode:
.
Set the mode switch to COOL.
.
Press the TEMP DOWN button to a temp 5o below room   
       temperature.
.
Allow the system 5 min to respond.
.
Verify that cool air is blowing from the system.
.
Set the mode switch to OFF.
To check Fan:
.
Switch mode to OFF during fan test.
.
Switch the FAN switch to the ON position. Verify air is blowing from vents.
.
After test, return fan switch to AUTO, and mode to HEAT or COOL.
Congratulations, you have successfully installed your unit. Please proceed to the OPERATING GUIDE
to initialize the new thermostat. REMEMBER, Mode switch must be in HEAT or COOL to operate.
HEATCOOLAUTOON
OFFFAN
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. 
W
G
W2
R
C
From Normal
two stage system
B
G
Y
R
C
From heatpump
with outAux heat
O
or
B
G
Y
R
C
From heat pump
with Aux heat
O or
W or W2
TEMP UP
arrow
Mode Switch Fan Switch
TEMP DOWN
arrow
NOTE: Wires marked with dotted line are optional.

PG 11
PG 12
Go To Page 10
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 Wwire to the Wterminal on the thermostat. This
connects the heater control line to the thermostat.
Your heater is now connected to the thermostat.
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 Wwire to the Wterminal on the thermostat.
This connects the heater control line to the thermostat.
STEP 3 - Connect the Gwire to the Gterminal on the thermostat.
This connects the Fan to the thermostat.
Your system is now connected to the thermostat.
Go To Page 10
NOTE: Wires marked with
the dotted line are optional.
NOTE: Wires marked with
the dotted line are optional.
W
RH
R
or
From Furnace
C
RH
W
C
From Furnace
G
or R
2 WIRE
jumper
wire
FURNACE
HEAT
Thermostat
R W C
HEAT
Power
3 WIRE
FURNACE
jumper
wire
Heat
Power Heat
W G RH C
FAN
Thermostat

PG 14
PG 13
R
G
Y
W
C
RH
or
From Furnace
and AC unit
STEP 1 - Connect the Y wire
to the Yterminal on the
thermostat. This connects to
the Cooler compressor.
STEP 2 - Connect the RH or Rwire to the RH
terminal on the thermostat.
This connects the Heater/Cooler Power.
STEP 3 - Connect the Wwire to the Wterminal
on the thermostat.
This connects to the heater control line.
STEP 4 - Connect the G wire to the Gterminal on the Thermostat.
This connects to the Fan.
Your HVAC system is now connected to the thermostat.
Go To Page 10
4 WIRE NON-HEAT PUMP
NOTE: Wires marked with
the dotted line are optional.
HVAC SYSTEM
jumper
wire
Heat
Power Heat
WG RH
C
FAN
Y
Cool
Comp
Thermostat
From Furnace
and AC unit
G
W
Y
RH
RC
C
STEP 1 - Remove the Jumper wire.
STEP 2 - Connect the Y wire
to the Yterminal on the
thermostat. This connects to
the Cooler compressor.
STEP 3 - Connect the RH wire to the RH terminal
on the thermostat. This connects to the Heater
Power.
STEP 4 - Connect the RC wire to the RC terminal
on the thermostat. This connects to the Cooling
Power.
STEP 5 - Connect the Wwire to the Wterminal on the thermostat.
This connects to the heater control line.
STEP 6 - Connect the G wire to the Gterminal on the Thermostat.
This connects to the Fan.
Your HVAC system is now connected to the thermostat.
Go To Page 10
5 WIRE NON-HEAT PUMP
NOTE: Wires marked with
the dotted line are optional.
HVAC SYSTEM
Remove
jumper
wire
HEAT
Power
Heat
WG RHRC
C
FAN
Y
Cool
Comp
COOL
Power
Thermostat

PG 16
PG 15
Go To Page 10
Go To Page 10
NOTE: Wires marked with
the dotted line are optional.
STEP 1 - Connect the G wire to
the Gterminal on the thermostat.
This connects the Fan.
STEP 2 - Add a jumper wire
between Wand Y.
STEP 3 - Connect the Ywire to
the Y terminal on the thermostat.
This connects the Compressor.
STEP 4 - Connect the O or B wire to the O or B
terminal on the thermostat. (If you have both Oand 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.
Your HVAC system is now connected to the
thermostat.
HEAT PUMP
w/o Auxiliary Heat
O or B
Single Stage HEAT PUMP
Change
Over
G
O or B
R
C
FAN
Y
Comp
24VAC
Power
jumper
wire
jumper
wire
Thermostat
B
G
Y
R
C
From heat pump
w/o Aux heat
O
or
NOTE: Wires marked with
the dotted line are optional.
STEP 1 - Connect the G wire to
the Gterminal on the thermostat.
This connects the Fan.
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.
Your HVAC system is now connected to the
thermostat. (If the system also has AC, connect the Y
wire to the Yterminal 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.)
NORMAL 2 Stage 
Heat System
Two Stage Heat System
G
RW2
C
FAN
W
Two Stage
Furnace
jumper
wire
Thermostat
W
G
W2
R
C
From Normal
two stage system

8050C Features
PG 17
PG 18
STEP 1 - Connect the G wire to
the Gterminal on the thermostat.
This connects the Fan.
STEP 2 - Add a jumper wire
between Wand Y.
STEP 3 - Connect the Ywire to
the Y terminal on the thermostat.
This connects the Compressor.
STEP 4 - Connect the O or B wire to the
O or B terminal on the thermostat. (If you have both
Oand B wires, use the Oand 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.
Your HVAC system is now connected to the thermostat.
Go To Page 10
HEAT PUMP
with Auxiliary Heat
NOTE: Wires marked with
the dotted line are optional.
O or B
(not both)
HEAT PUMP
Change
Over
AUX
Heat
G
O or B
R
C
FAN
Y
Comp
24VAC
Power
jumper
wire
jumper
wire
Thermostat
B
G
Y
R
C
From heat pump
with Aux heat
O
or
W
or
W2
HEAT COOLAUTO ON
OFF F
AN
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
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.