ICM Controls FS1500L - User Manual

To Next Page

Caution

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.

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

General Description

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

To Remove Existing Thermostat

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.

Replacing Wiring Labels

Replacetheoldlabelswiththe

enclosednewlabels.

Old New Type

F,G G Fancontrolrelay

H,W,4 W Heatingcontrol

M,4,RH,RS,R R Transformer,hotside

N/A S1,S2 Optionalremotesensor

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 congurations:1-stageheat,gas,oil,electric

Terminations:R,W,G,S1,S2

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

Manual Changeover

Non-Programmable

Battery

• 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

FS1500L/FS1500VL

GARAGE THERMOSTAT

Non-Programmable Electronic Thermostat

Parts Diagram (Horizontal model shown)

Battery

Compartment

Electric/GasJumper

HighTemperatureSwitch

ModeSwitch

FanSwitch

Thermistor

Note: Mount thermostat about ve feet above the oor. 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.

To Install Thermostat

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.

Installing and Changing Batteries

Package Contents/Tools Required

Package includes: SimpleComfort

FS1500L/FS1500VLthermostatonbase,thermostat

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.

Need help?

Do you have a question about the ICM Controls FS1500L and is the answer not in the manual?

Summary

General Description and Features

General Description

Describes the thermostat as a digital, mercury-free, non-programmable electronic thermostat compatible with single-stage heating.

System Compatibility

Highlights compatibility with single-stage heating, zoned systems, and gas/electric or millivolt systems.

System Customization

Notes the availability of three adjustable temperature differential settings for system control.

Thermostat Installation and Operation

Removing Existing Thermostat

Provides step-by-step instructions for safely removing the old thermostat, including power shutoff and wire labeling.

Replacing Wiring Labels

Guides users on how to replace old wire labels with the new ones provided for correct terminal connections.

Installing New Thermostat

Details the procedure for mounting the new thermostat base, connecting wires, and securing the unit to the wall.

Installing and Changing Batteries

Explains how to install or replace the two 'AA' alkaline batteries for thermostat operation and reset settings.

Advanced Features and Troubleshooting

Remote Sensor Installation

Instructions for optional remote sensor setup, including wiring and disabling the main sensor.

Setting Temperature Differential

Procedure to adjust the temperature differential for more or less frequent system cycling.

Starting the Thermostat Operation

Steps to initiate heating system and fan operation using the thermostat controls.

Quick Test Procedure

Verification steps to confirm proper installation and system response to temperature changes.

Troubleshooting Common Issues

Provides solutions for common symptoms like blank display, LO BAT, or improper fan/heating control.

Wiring Diagrams

Illustrations for various system configurations including single-stage, millivolt, and zone valve/damper systems.

Setting Setpoint Temperature

Guide on how to view and adjust the desired temperature setpoint for the heating system.

Warranty Information

One-Year Limited Warranty

Details the warranty coverage, limitations, and buyer's responsibilities for claims.

The SimpleComfort® FS1500L/FS1500VL is a digital, mercury-free, non-programmable electronic thermostat designed for single-stage heating systems. It is compatible with various heating systems, including millivolt, hydronic (water or steam), gas, and electric systems. The thermostat features a backlit display for easy readability and is environmentally safe.

Function Description:

The primary function of this thermostat is to control single-stage heating systems. It can also be used as a master thermostat in zoned system applications. The device allows for system customization, offering three available temperature differential settings to optimize heating cycles and comfort.

Important Technical Specifications:

Electrical Rating: Millivolt to 30 VAC/VDC.
DC Power: 3.0 VDC (2 "AA" alkaline batteries included).
Current Load: 1 amp maximum per terminal, 2 amp maximum total load.
Temperature Control Range: 35°F to 75°F.
Accuracy: ± 1°F.
Backlight: Not available on some models (note: the general description mentions a backlit display, but this specific specification clarifies it's not available on some models, implying it might be on others or is a general feature of the line).
Differential Range: 1°F to 3°F.
System Configurations: 1-stage heat, gas, oil, electric.
Terminations: R, W, G, S1, S2.
Mounting: Approximately five feet above the floor, avoiding outside walls, direct sunlight, behind doors, or areas affected by vents/ducts.

Usage Features:

Temperature Setting: Users can easily set the desired temperature by pressing the "down" or "up" buttons. The new setpoint is automatically saved in memory after 5 seconds.
Temperature Differential Adjustment: The thermostat allows users to adjust the temperature differential from 1°F (default) to 3°F. This feature helps prevent the system from turning on and off too frequently, enhancing comfort and potentially saving energy. To adjust, batteries must be removed for 10 seconds and reinstalled. During the first 10 seconds of operation, the differential is displayed, and the "down" or "up" buttons can be used to select the desired setting.
Fan Control: The thermostat includes a Fan Auto/On switch. In "Auto" position, the fan operates only when the heating system is active. In "On" position, the fan runs continuously.
System Mode Selection: An Off/Heat switch allows users to select between turning the system off or engaging the heating mode.
Remote Sensor (Optional): The device supports an optional remote sensor (P/N: ACC-RT104) for more flexible temperature sensing. Installation involves connecting two shielded wires between the remote sensor and the thermostat's S1 and S2 terminals. The main sensor on the thermostat's circuit board must be disabled by cutting it when a remote sensor is used.
Wiring Diagrams: Comprehensive wiring diagrams are provided for various setups, including 3-wire single transformer, 2-wire single transformer or millivolt, and 3-wire/2-wire zone valve/damper motor systems.
Quick Test Functionality: A quick test procedure is outlined to verify proper installation. This involves setting the Off/Heat switch to Heat and adjusting the set temperature to 5°F above room temperature to check heating and fan operation, and then setting the Fan Auto/On switch to On and Auto to check fan control.

Maintenance Features:

Battery Replacement: The thermostat operates on two "AA" alkaline batteries. The LCD will display "LO BAT" or go blank when batteries need changing. It is recommended to change batteries at least once a year or when the "LO BAT" warning appears. After battery replacement, the room temperature setting and differential setting must be reset.
Troubleshooting Guide: A troubleshooting section helps diagnose common issues such as the system not turning on, blank LCD/LO BAT display, improper fan control, and frequent on/off cycling. Remedies include checking/replacing batteries, verifying the GAS/ELEC jumper position, and adjusting the temperature differential.

Important Safety Information:

Always turn off power at the main power supply before installing, cleaning, or removing the thermostat to prevent electrical shock.
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, as this will damage the thermostat and void the warranty.
All wiring must conform to local and national electrical and building codes.
Use this thermostat only as described in the manual.

The product comes with a one-year limited warranty covering defects in material or workmanship from the date of manufacture. The warranty specifies conditions for claims and limitations of liability.