ICM Controls FS1500L Installation, Operation & Application Manual

FS1500L/FS1500VL
GARAGE THERMOSTAT
Non-Programmable Electronic Thermostat
• Controls Single Stage Heating Systems
• Millivolt and Hydronic (water or steam) System Compatible
• Compatible with Gas and Electric Systems
• Backlit Display
• Mercury-Free,
Environmentally Safe
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 www.icmcontrols.com
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.
Parts Diagram
Battery
Compartment
Thermistor
Mode Switch

Specifications

Electrical rating: • Millivolt to 30 VAC/VDC
• DC Power: 3.0 VDC (2 "AA" alkaline batteries included)
• 1 amp maximum per terminal, 2 amp maximum total load
Temperature control range: 35°F to 75°F Accuracy: ± 1°F
Back Light: Not available on some models
Differential Rage: 1°F to 3°F
System configurations: 1-stage heat, gas, oil, electric
Terminations: R, W, G, S1, S2

Important Safety Information

WARNING!: Always turn off power at the main power supply before installing, cleaning,
or removing thermostat.
• This thermostat is for 24 VAC applications only; do not use on voltages over 30 VAC
• Do not short across terminals of gas valve or system control to test operation; this will damage your
thermostat and void your warranty
• All wiring must conform to local and national electrical and building codes
• Use this thermostat only as described in this manual
Manual Changeover
Non-Programmable
Caution
(Horizontal model shown)
Electric/Gas Jumper
High Temperature Switch
Fan Switch
Battery Package includes: SimpleComfort
cover, wiring labels, screws and wall anchors, (2) "AA" alkaline batteries, and
Installation, Operation and Application Guide.
Tools required for installation: Drill with 3/16" bit, hammer, screwdriver.
The SimpleComfort ® FS1500L/FS1500VL thermostat is a digital, mercury-free, non-programmable,
electronic thermostat.
• Compatible with single-stage heating systems
• Compatible as a master thermostat in zoned system applications
• System Customization: Choose three available temperature differential settings
1. Turn off power to the heating 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 sections for instructions on how to install this thermostat.
Replace the old labels with the
enclosed new labels.
Note: Mount 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 system by removing the fuse or switching off the appropriate circuit
breaker.
2. Move the Fan Auto/On switch into Auto position.
3. To remove cover, insert and twist a coin or screwdriver in the slots on the sides 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 in 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.
11. Insert stripped, labeled wires in matching wire terminals. See "Wiring Diagrams" section of this
manual.
CAUTION!: Be sure exposed portion of wires does not touch other wires.
12. 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.
13. Set the GAS/ELEC jumper to Electric or Gas/Oil
14. Insert two fresh "AA" alkaline batteries into thermostat, oriented in the direction shown on the
battery compartment.
15. Replace cover on thermostat by snapping it in place.
16. Turn on power to the system at the main service panel.

Installing and Changing Batteries

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, or whenever the LO BAT warning displays.
Note: After installing new batteries, you have to reset the room temperature setting and the
differential setting.
1. Move the Off/Heat switch into the Off position.
2. Move the Fan Auto/On switch into Auto position.
3. Remove the cover, and install the two "AA" alkaline batteries. 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.
Package Contents/Tools Required
® FS1500L/FS1500VL thermostat on base, thermostat

General Description

To Remove Existing Thermostat

Replacing Wiring Labels

Old
F, G
H, W, 4
M, 4, RH, RS, R
N/A S1, S2

To Install Thermostat

New Type
G Fan control relay
W Heating control
R Transformer, hot side
Optional remote sensor