Install guide 8050C
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ENGLISH
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Customer Support: 888-515-2585 or
1-405-061
Made in China
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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R
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
A
rock or if you are using the old
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2
W
C
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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5 Gas-Electric Selection
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).
6 Heat Pump Switch
A
G
Y
W
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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B
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Switch MODE switch to OFF and the FAN switch to
A
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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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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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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
o
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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.
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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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
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
C
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.
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