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 P/N 900261-00 Rev. A                                      REV 3/18/14   Page 1 of 5 

IHP: WS-S-TSTAT 

 

 
 

 

                             

Cat. No. H8864

    Model: WS-S-TSTAT 

INSTALLATION AND OPERATION INSTRUCTIONS 

 
 
 
 

INTRODUCTION

 

This WS-S-TSTAT wired wall thermostat was developed to provide a safe, reliable control system for gas heating appliances.  The 
system can be operated thermostatically or manually from the wall unit.  

 
WALL MOUNT THERMOSTAT

 

 
 

The WS-S-TSTAT wired thermostat operates on (2) 3V Button Cell (Included) which powers the 
LCD screen and circuit board. Before using the WS-S-TSTAT wall thermostat the 3V batteries must 
be installed into the battery compartments.   
 
 
 
It is recommended that CR2032 lithium batteries always be used for longer battery life and 
maximum operational performance. If the LCD screen will not come on, check the 3V Button Cell 
battery. 

 

 
 

 

 

TO INSTALL BATTERIES IN THE THERMOSTAT 

1.  Remove face from backing wall plate this is done by sliding the face up about 1/2” then pull the face off the base plate. As 

shown in Figure #1 

2.  Locate the (2) holders for the 3V button cell batteries. 
3.  Slide the button cell batteries into the battery holders. (Make sure that the batteries are installed with the (+) plus side facing 

you or up. 

4.  Reinstall the face to the backing plate this is done by sliding the face in and down about 1/2” then check that the (2) male     

terminal connectors on the face are engaged in the female terminal connectors on the backing plate.  As show in Figure #1 

 

TO REMOVE THE BATTERIES FROM THE THERMOSTAT 

1.  Remove face from backing plate

 

this is done by sliding the face up about 1/2” then pull the face off the base plate. As shown in 

Figure #1

 

2.  Locate the (2) holders for the 3V button cell batteries. 

3. 

Insert a small screwdriver into the slot above the button cell battery and push the battery out. As shown in 

Figure #2 

4.  Reinstall the face to the backing plate this is done by sliding the face in and down about 1/2” then check that the (2) male     

terminal connectors on the face are engaged in the female terminal connectors on the backing plate. As show in Figure #1 

 

 

 

 

Figure #2 

 
 

 

 

 

 

 

 

 

 

 
 
 
 
 
 

IF YOU CANNOT READ OR UNDERSTAND THESE INSTALLATION INSTRUCTIONS DO NOT 

ATTEMPT TO INSTALL OR OPERATE  

ON

OFF

SET

°

)

ROOM “SET” TEMP

LCD 

Display

Thermo

Mode

SET Button

ON/UP

Button

DOWN/OFF

Button

 

(2) 3 Volt Button
Cell Batteries

Battery Removal
Slots

  +
Plus
Side

  +
Plus
Side

 

Figure #1 

Summary of Contents for H8864

Page 1: ...r the 3V button cell batteries 3 Slide the button cell batteries into the battery holders Make sure that the batteries are installed with the plus side facing you or up 4 Reinstall the face to the backing plate this is done by sliding the face in and down about 1 2 then check that the 2 male terminal connectors on the face are engaged in the female terminal connectors on the backing plate As show ...

Page 2: ... and the word SET will appear on the LCD screen and now the thermostat will automatically send an ON or OFF signal to the appliance 5 To disengage the thermostat mode push the OFF button or push and hold the SET button until 2 dashes appear on the LCD screen When you release the SET button this will disengage the thermostat mode and the word SET will disappear from the LCD screen SETTING 0 F 0 C S...

Page 3: ...efore attempting installation Follow instructions carefully during installation Any modifications of the WS S TSTAT or any of its components will void the warranty and may be pose a fire hazard Do not connect any gas valve or electronic module directly to 110 120VAC power Consult gas appliance manufacturer s instructions and wiring schematics for proper placement of all wires All electronic module...

Page 4: ...to set the temperature on the WS S TSTAT to a temperature of a least 2 0 F 1 0 C above the ROOM temperature displayed on the LCD screen With this manual setting the normal thermostatic cycle is overridden and the system flame will ignite Set the SET temperature to at least 2 0 F 1 0 C below the room temperature and the system flame will extinguish in a few seconds Thereafter it should continue to ...

Page 5: ... wall thermostat Review the appliance manufacturer s operation manual to make sure all connections are properly made Then check the operation of the WS S TSTAT in the following manner 1 Be sure the batteries are properly installed and that the battery output is 2 4 volts on each battery or more If one battery is installed backward the wired wall thermostat will not operate 2 The WS S TSTAT has 2 3...

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