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Model 100 T-Stat LLC
User's Manual
COPYRIGHT NOTICE
Copyright © 2018 by Quest Controls Inc. (QUEST).
The material discussed in this publication is the proprietary property of QUEST.
QUEST retains all rights to reproduction and distribution of this publication.
Specifications are subject to change without notice.
Rev 3.2, 04/10/18
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Summary of Contents for Quest Controls 100 T-Stat LLC
- Page 1 Model 100 T-Stat LLC User’s Manual COPYRIGHT NOTICE Copyright © 2018 by Quest Controls Inc. (QUEST). The material discussed in this publication is the proprietary property of QUEST. QUEST retains all rights to reproduction and distribution of this publication. Specifications are subject to change without notice.
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Page 2: Table Of Contents
Table of Contents AT&T “Ask Yourself” Principles and Philosophy ................... 3 1.0 Overview ..............................4 1.2 Features and Benefits ......................... 4 2.0 Installation / Wiring ..........................4 2.1 Installing the mounting plate ......................5 2.2 Wiring ..............................5 3.0 Front Panel Display/Keypad Operation ....................7 3.1 Run Mode ............................ -
Page 3: At&T "Ask Yourself" Principles And Philosophy
AT&T “Ask Yourself” Principles and Philosophy “Ask Yourself” principles are presented in the form of questions. Listed in the table below are the ten “Ask Yourself” questions that you should be able to confidently answer “yes” to before you undertake any task related to the network. If you are unable to answer “yes”... -
Page 4: Overview
1.0 Overview The Quest Controls Lead/Lag control thermostat is designed for controlling two single stage HVAC systems. It is an easy to use thermostat for remote shelters that require a simple to use lead/lag controller with a wide profile operating range for cooling. 1.2 Features and Benefits •... -
Page 5: Installing The Mounting Plate
2.1 Installing the mounting plate 1. Plan the Location –The T-Stat should be mounted away from external sources of heat or cold (doors, HVAC supply grill, exhaust from equipment, radio heads, etc.) and provide a good representation of the shelter’s temperature. 2. -
Page 6: Figure 3 - Typical Wiring Diagram
3. Typical Wiring Diagram HVAC Unit #2 Heating T-Stat Lead/Lag Controller Cooling Supply Fan Back plate mounts to HVAC 2 standard electrical box WIRE CHANNEL HVAC Unit #1 Heating HVAC 1 HVAC 2 Cooling R C G Y W G Y W Supply Fan Figure 3 –... -
Page 7: Front Panel Display/Keypad Operation
3.0 Front Panel Display/Keypad Operation The Quest T-Stat LLC has a 2X16 character backlit LCD display and five buttons for status review and programming. The backlit is normally off but will turn on with a press of any key. The backlight will turn off after a few seconds of no keys being pressed. -
Page 8: T-Stat Settings
3.4 T-Stat Settings The T-stat LLC comes preprogrammed from Quest and cannot be changed in the field. The settings are as follows: Setpoint Name Value Normal mode - Lead unit cooling on Normal mode - Lag unit cooling on Normal mode - All cooling off Normal mode - Lead unit heating on Normal mode - Lag unit heating on Normal mode - All heating off... -
Page 9: Troubleshooting
5.0 Troubleshooting LCD Screen is dark and no characters are Remove cover and verify presence of power on the “R” displayed terminal, check connection of the common on the “C” terminal. Check for presence of 24VAC between R and C. T-Stat mode say Cool1, but compressor Verify connection to HVAC unit.
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