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Lightstat TG Series Installation And Operation Manual

Thermostats for heat/cool applications
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Lightstat Installation and Operation Manual
TG Series Thermostats for Heat/Cool Applications
24 Volt A.C. Power Robbing, Temperature Limiting Thermostat with
Optional Automatic Temperature Setback
No Common Wire Needed.
Read instructions carefully before attempting to install, operate or service the Lightstat
electronic setback thermostat. Failure to comply with instructions could result in personal
injury and/or property damage. Retain instructions for future reference.
Description
The Lightstat thermostat saves energy and
operating costs by using Owner specified factory
limited temperature ranges which prevent excessive
use of heating or cooling equipment. These limits
cannot be changed by the user. The unit requires no
batteries and no programming or reset in the event of
a power failure. Optionally, the Lightstat thermostat
can set back the temperature based on light level in
the space. A dark space is considered unoccupied
and will turn the heating and cooling setpoints back
for better savings.
Thermostats described are available in Heat/Cool
(TGHC) and Heat Pump (TGHP) models.
Specifications
Construction.............................Electronic (solid state)
Electrical Requirements............24-30 VAC
Anti-Cycle Time Delay...............45 seconds ON and OFF
Switching Current.......................0.2 to 1.0 AMP (max) per output
Heating Temperature control range (typical)............55°F to 78°F (on models with heating)
Cooling Temperature control range (typical)...........85°F to 70°F (on models with cooling)
Operating temperature differential minimum 0.5°F
Dimensions 3.6"W x 5.0"H x 1.3"D
Weight 8.0 oz
Function switches: Cool/Off/Heat & Fan On/Auto

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Summary of Contents for Lightstat TG Series

  • Page 1 Optional Automatic Temperature Setback No Common Wire Needed. Read instructions carefully before attempting to install, operate or service the Lightstat electronic setback thermostat. Failure to comply with instructions could result in personal injury and/or property damage. Retain instructions for future reference.

  • Page 2: General Safety Information

    Warning: Read these instructions carefully! Failure to follow them could cause damage to the product or cause a hazardous condition. General Safety Information: Do not use this product on circuits exceeding 30 VAC. Higher voltage will damage this control and could cause electrical shock or personal injury. Installer must be a trained, experienced service technician familiar with the system this product will control.

  • Page 3: Installation

    Turn the system power ON and the thermostat switch to the ON position as desired. Note: Your Lightstat may come from the factory with fixed light sensitivity. This means that under normal lighting, the thermostat will heat/cool your space to the comfort slide setting. Under low light conditions, the thermostat will set the temperature back.

  • Page 4: Adjusting The Temperature Setting

    Adjusting (optional) night setback setting: Your Lightstat may come from the factory with a fixed night setback. That means when your Lightstat thermostat is in the Setback mode, it will automatically set the heating/cooling back a predetermined number of degrees from the comfort slide setting. If your model has setback options, there will be a night setback switch on the back or in the lower right hand corner of the thermostat.

  • Page 5: Basic Operation

    Check the inside cover for your model’s temperature range and setback. Application Notes: When connecting the TG series (power robbing) thermostats to a furnace control board or electronic ignition model, one of (3) potential issues may occur. 1. When not calling for heat, the furnace falsely starts its heating cycle.

  • Page 6: Thermostat Layout

    Note: TGHP models do not have Never connect a common or lock on/lock off timers for backup heating. neutral wire to the Lightstat. Operation is strictly temperature dependent. This will cause damage to the Note: This model may be powered at all Lightstat.

  • Page 7: Setting The Dip Switches

    Setting the DIP switches: Your thermostat may have up to (7) configurable DIP switches depending on the features specified for your application. DIP switches may be configured in accordance with the following table. For TGHC Models, switch positions 1 through 5 should be set. Positions 6 and 7 have no function.
  • Page 8 1. No power to the stat or sys- 1. Check the system low light up. tem equipment. voltage power. 2. Lightstat switch in OFF 2. Check the system ON/OFF position. switch. 3. Check the circuit breaker. The display works but the...

  • Page 9: Warranty

    Warranty Lightstat Inc. warrants each product manufactured by it to be free from defects in workmanship under normal use and service; its obligation under this warranty, at its option, being limited to repair or replace the product if found defective, provided that it is removed by...

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