X-XX UL
INSTALLATION INSTRUCTIONS
®U.S. Registered Trademark • • All Rights Reserved
Multistage
Electronic Thermostat
TAYSTAT 375
APPLICATION
The TAYSTAT 375 Multistage Electronic Thermostat provides electronic control of 24 Vac two-stage heating and two-
stage cooling systems. Refer to Table 1 for a general description of the thermostat. The thermostat requires a common
wire to supply power.
Table 1. Thermostat Description.
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash. Dispose of properly.
Contact your local waste management authority for
instructions regarding recycling and the proper
disposal of the old control.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
the instructions can damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After completing installation, use these instructions
to check out the product operation.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
Location
Install the thermostat about 5 ft (1.5m) above the floor in
an area with good air circulation at average temperature.
See Fig. 1.
Do not install the thermostat where it can be affected by:
— drafts, or dead spots behind doors and in corners.
— hot or cold air from ducts.
— radiant heat from sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall
behind the thermostat.
Wallplate Installation
Mount the thermostat horizontally on the wall or on a 2 in.
x 4 in. wiring box.
1. Position and level the wallplate (for appearance
only). The thermostat functions properly even when
not level.
Pub. No. 18-HD28D1-1
TAYSTAT System Changeover
System
Selection
Fan
Selection Comments
375 Heat-Cool Automatic Heat-Off-Cool-Auto On-Auto Use keyboard to make system and fan
selections.
69-1592-1
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