Installation, Operation & Application Guide
For more information on our complete range of American-made
products – plus wiring diagrams, troubleshooting tips and more,
visit us at
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SC2000/SC2001
Non-Programmable Electronic Thermostats
• Permanent Memory
• Controls Single Stage Heating/
Cooling Systems
• Single Stage Heat Pump Systems
• Compatible with Gas, Oil or Electric
Systems
• Millivolt and Hydronic (water or
steam) System Compatible
• Mercury-Free, Environmentally Safe
SET
ROOM
LO BAT
DIFF
Low battery signal
Temperature
differential setting
Room temperature
Room temperature
setpoint
Specifications
SC2000
SC2001
Input:
Input:
•
Voltage:
Millivolt to 30 VAC/VDC
•
Voltage:
18-30 VAC
•
DC Power:
3 volts (2 “AA” alkaline batteries included)
Output:
•
Maximum:
1 amp per terminal (3 amp total for all terminals)
•
Temperature control ranges:
45°F to 90°F (7°C to 32°C)
Accuracy:
± 1°F (± 0.5°C)
•
Differential range:
1°F to 3°F (0.5°C to 1.5°C)
•
System configurations:
Single-stage heat, single-stage cool or single-stage heat
pump, gas, oil, electric
•
Compressor delay:
4 minutes
•
Terminations (SC2000):
RC, RH, W, Y, O, B, G
•
Terminations (SC2001):
R, W, Y, O, B, G, C
Important Safety Information
• Always turn off the thermostat before installing, removing, cleaning, or servicing; turn off the power at the main
power source by unscrewing fuse or switching off circuit breaker
• Do not switch to “Cool” if room temperature is below 50°F (10°C); this could damage your A/C system and cause
injury
• Do not install on voltages higher that 30 VAC
• All wiring must conform to local and national building and electrical codes and ordinances
• While cleaning, do not get soap directly on thermostat switches or LCD readout; only use a damp cloth with a mild
soap to wipe outside of thermostat cover
General Description
• The SimpleComfort® thermostat is a
digital, mercury-free, non-programmable, electronic thermostat
• Compatible with single-stage
heating systems, heating/cooling systems
, and
heat pump systems
; works with
gas, oil,
or
electric
systems
• Compatible as a
master thermostat
in zoned system applications
•
Freeze Protection Feature (SC2000 only):
Protects pipes from freezing! If the room temperature drops to 40°F,
the thermostat automatically turns on the heat; the thermostat must be in the Heat position; works even if the
batteries are dead
•
Built-in Compressor Protection for Air Conditioners:
To protect the A/C’s compressor, there is a 4-minute
delay between the system turning off and the A/C starting
•
System Customization:
Choose
Fahrenheit
or
Celsius
display; three available
temperature differential
settings
Package Contents/Tools Required
Package includes:
SimpleComfort
®
non-programmable thermostat on base, thermostat cover, wiring labels, screws
and wall anchors, batteries (if applicable), Installation, Operation and Application Guide.
Tools required for installation:
Drill with 3/16” bit, hammer, screwdriver.
To Remove Existing Thermostat
ELECTRICAL SHOCK HAZARD
– Turn off power at the main service panel by removing the fuse
or switching the appropriate circuit breaker to the OFF position before removing the existing
thermostat.
1. Turn off power to the heating and cooling system by removing the fuse or switching off the appropriate circuit
breaker.
2. Remove cover of old thermostat. This should expose the wires.
3. Label the existing wires with the enclosed wire labels before removing wires.
4. After labeling wires, remove wires from wire terminals.
5. Remove existing thermostat base from wall.
6. Refer to the following section for instructions on how to install this thermostat.
To Install Thermostat
ELECTRICAL SHOCK HAZARD
– Turn off power at the main service panel by removing the fuse
or switching the appropriate circuit breaker to the OFF position before removing the existing
thermostat.
IMPORTANT:
Thermostat installation must conform to local and national building and electrical codes and
ordinances.
Note:
Mount the thermostat about five feet above the floor. Do not mount the thermostat on an outside
wall, in direct sunlight, behind a door, or in an area affected by a vent or duct.
1. Turn off power to the heating and cooling system by removing the fuse or switching off the appropriate circuit
breaker. Move the
Cool/OFF/Heat
switch to
OFF
.
2. Move the
FAN AUTO/ON
switch to
AUTO
.
3. To remove cover, insert and twist a coin or screwdriver in the slots on the top of the thermostat.
4. Put thermostat base against the wall where you plan to mount it (Be sure wires will feed through the wire opening
in the base of the thermostat).
5. Mark the placement of the mounting holes.
6. Set thermostat base and cover away from working area.
7. Using a 3/16” drill bit, drill holes in the places you have marked for mounting.
8. Use a hammer to tap supplied anchors into mounting holes.
9. Align thermostat base with mounting holes and feed the control wires through wire opening.
10. Use supplied screws to mount thermostat base to wall.
CAUTION!
:
Be sure exposed portion of wires does not touch other wires.
11. Tighten screws on terminal block. Gently tug wire to be sure of proper connection. Double check that each wire
is connected to the proper terminal.
CAUTION!
:
Remove RH/RC jumper for 2 transformer system (
SC2000
only).
12. Set the
fan jumper
to
electric
or
gas/oil
.
13. Install two “AA” alkaline batteries (
SC2000
only).
14. Replace cover on thermostat by snapping it in place.
15. Turn on power to the system at the main service panel.
Installing and Changing Batteries (SC2000 only)
If your LCD is blank, or displaying
LO BAT
, the batteries are not installed or need to be changed. We suggest you
change the batteries at least once a year and whenever the
LO BAT
warning displays.
Step 1:
Move the
Cool/Off/Heat
switch into the
Off
position.
Step 2:
Move the
Fan Auto/On
switch into the
Auto
position.
Step 3:
Remove the cover, and install the two “AA” alkaline batteries into the battery compartment. Proper battery
installation is important! Make sure the positive ends of the batteries match the positive terminals in the
battery compartment.
If the display is on, the batteries are installed properly.
Replacing Wiring Labels
Replace the old labels with the enclosed new labels:
Old
New
Type
F, G
G
Fan control relay
O
O
Cool active reversing valve
B
B
Heat active reversing valve
Y, Y6
Y
Cooling control
H, W, 4
W
Heating control
C
Transformer, common side
M, 4, RH, RS, R
R
Transformer, hot side
C
Y or C
If the C terminal is the cooling control, connect to Y terminal; if it is the
common side of the transformer, connect to C terminal
SC2000 –
Zone Valve/Damper Motor Systems
3-Wire, Zone Valve/Damper Motor System
2-Wire, Zone Valve/Damper Motor System
RH RC W Y B O G
RH RC
Y B
G
RH RC
Y B O G
RH RC W Y
O G
RH RC W Y
O G
RH RC W Y B O
Zone 1
Zone 3
Zone 2
Zone 1
Zone 3
Zone 2
24 VAC
*
Use appropriate
size, single pole/
double throw relay
Note:
Differential temperature may need to be increased for zone/damper system
*
*
Wiring Diagrams
4-Wire, Single Transformer
HOT
120 VAC
24 VAC
Transformer
Heating
Control
HOT
RH
RC
W
Y
B
O
G
120 VAC
24 VAC
Remove
Pre-Installed
Jumper
Cooling
Control
Fan
Control
(Cooling)
Transformer
HOT
120 VAC
24 VAC
T
H
E
R
M
O
S
T
A
T
Note:
Both transformers must be in phase
5-Wire, Two Transformer
Pre-Installed Jumper
RH RC
RH RC
Cooling
Control
Fan
Control
SC2000 –
Heating/Cooling
Parts Diagrams
SC2000
SC2001
Electric/Gas
Jumper
Mode
Switch
Fan
Switch
Electric/Gas
Jumper
Mode
Switch
Fan
Switch
Freeze
Switch
RH RC Jumper
SC2001
SC2000
R
W
Y
B
O
G
GAS
ELEC
RC
RH
W
Y
B
O
G
GAS
ELEC
Battery Compartment
For Vertical and Horizontal Models
T
H
E
R
M
O
S
T
A
T
RH
RC
W
Y
B
O
G
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