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This manual covers the following models:

• T955W Master Thermostat
• Base Module

INSTALLATION MANUAL

A trained, experienced technician 
must install this product.

Carefully read these instructions. You 
could damage this product or cause a 
hazardous condition if you fail to follow 
these instructions.

Need Help?

 

For assistance with this product please 

visit http://www.pro1iaq.com or call Pro1 

Customer Care toll-free at 888-Pro1iaq 

(776-1427) during normal business hours 

(Mon-Fri 9 AM - 6 PM Eastern)

Table of Contents

Thermostat Applications Guide

Page

Battery Power

*

Hardwire (Common Wire)
Hardwire (Common Wire) with Battery Backup

*

 If using remote sensors the thermostat 

  must be hardwired.

Power Type

1

Gas or Oil Heat
Electric Furnace
Heat Pump (No Aux. or Emergency Heat)
Heat Pump (with Aux. or Emergency Heat)
Multi-stage Systems
Heat Only Systems
Cool Only Systems
Dual Fuel Systems
Millivolt 

Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

No

Rev. 0950

Una versión española de este 
manual puede ser descargada 
en www.pro1iaq.com

® U.S. Registered Trademark. Patents pending.
Copyright © 2010 PRO1 IAQ, Inc. All rights reserved.

Thermostat Quick Reference
Installation Tips
Subbase Installation
Wiring
Establishing Communication
Technician Setup Menu 
Mounting & Battery Installation
Programming The Thermostat
Specifications & Contact Info

2

3-5
6-7

8
9

10-13

14

15-18

19

Description

This manual covers TopTech models:

TT-S-955W and T955W

Summary of Contents for truecomfort iii

Page 1: ...with Battery Backup If using remote sensors the thermostat must be hardwired Power Type 1 Gas or Oil Heat Electric Furnace Heat Pump No Aux or Emergency Heat Heat Pump with Aux or Emergency Heat Multi...

Page 2: ...hermostat becomes inoperable The batteries are located on the back of the thermostat Clean Display Pressing CLEAN DISPLAY will allow 30 seconds to clean the display The keys will be inoperable during...

Page 3: ...are in direct sunlight With an outside wall behind the thermostat In areas that do not require conditioning Where there are dead spots or drafts in corners or behind doors Where there might be conceal...

Page 4: ...NOT weatherproof Base Module Basement Installation 4 PRO1 Tip Wireless Range Range between the T955W and the base module is up to 100 feet with no obstructions and up to 50 feet in standard residenti...

Page 5: ...rproof Base Module Attic Installation 5 PRO1 Tip When performing an attic installation instead of placing the base module in the attic locate the closet nearest to the air conditioning unit Then mount...

Page 6: ...ose of it properly Your local waste management authority can give you instructions on recycling and proper disposal For vertical mount put one screw top and one screw bottom For horizontal mount put o...

Page 7: ...ule s subbase the same way you would wire a hardwired thermostat subbase For vertical mount put one screw top and one screw bottom For horizontal mount put one screw left and one screw right Horizonta...

Page 8: ...factory to operate a conventional heating and cooling system This thermostat will also operate a heat pump system See the heat pump configuration step on page 12 of this manual to configure the thermo...

Page 9: ...is reestablished The Blue LED on the base module will also turn off to show communication has been lost Note The Blue LED on the base module will be on when power is present The Blue LED will flash 3...

Page 10: ...on The heating swing setting is adjustable from 0 2 F to 2 F For Example A swing setting of 0 5 F will turn the heating on at approximately 0 5 F below the setpoint and turn the heating off at approxi...

Page 11: ...r nonprogrammable Program Options Select F for Fahrenheit temperature read out or select C for Celsius read out F for Fahrenheit C for Celsius F F or C The second stage will turn on at 2x the swing se...

Page 12: ...enable the balance point tech setup option The cooling fan delay setting will delay the fan from coming on in cool mode and keep running after the compressor shuts off for a short time to save energy...

Page 13: ...ep Then hold down the light button on the R251W until it beeps while in ZONE technician setup step on R251W To connect a second R251W change the T955W to read 2 and change the R251W to zone 2 The zone...

Page 14: ...the thermostat or base module snaps in place On the back of the thermostat insert 2 AA Alkaline batteries included Battery installation is optional if there are no remotes connected to the Master Ther...

Page 15: ...low to set the day of the week and current time Press MENU Press SET TIME Day of the week will be flashing Use the or key to select the current day of the week Press NEXT STEP The current hour is flas...

Page 16: ...customized program schedule if using 5 1 1 Wake Leave Return Sleep Wake Leave Return Sleep Wake Leave Return Sleep Weekday Customize Your Program Saturday Sunday Day of the Week Setpoint Temperature...

Page 17: ...period Repeat steps 4 through 7 for Saturday WAKE time period for Saturday LEAVE time period for Saturday RETURN time period and for Saturday SLEEP time period 1 2 3 4 5 6 7 8 9 Sunday Repeat steps 4...

Page 18: ...as needed It is very important to make sure the cooling setpoint temperature is at least 3 above the heating setpoint temperature and that the heating setpoint temperature is at least 3 below the cool...

Page 19: ...e Battery power from 2 AA Alkaline batteries 32 F to 105 F 0 to 41 C 90 non condensing maximum 4 7 W x 4 4 H x 1 1 D 916 MHz 19 SPECIFICATIONS CONTACT INFORMATION Specifications Pro1 IAQ Inc 1111 S Gl...

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