Honeywell 191108AJ Installation Instructions Manual

T8190A/191108AJ Heating or Cooling

Thermostat/Wallplate; T8190A/Q682B

Heating/Cooling Thermostat/Subbase

Check thermostat and subbase (if used) suitability for the

heating, cooling, or heating/cooling system. Refer to Table 1.

Assemble tools required: flat-bladed screwdriver, hand

or power drill with 3/16-in. drill bit, wire cutter/stripper or

sharp knife, bubble level or plumb bob and line.

Assure power is off to the heating, cooling, or heating/

cooling system at the main fuse panel. Most buildings have

a separate switch box or circuit breaker for disconnecting

power to the heating and cooling (if applicable) equipment.

This thermostat is compatible with all heating, cooling or

heating/cooling systems when thermostat is powered by

batteries. If thermostat is not powered by batteries, refer to

Table 1 for thermostat and system compatibility information.

TABLE 1—SYSTEM COMPATIBILITY FOR NON-BATTERY POWERED THERMOSTATS.

Type of Heating System to be Controlled

Electric (Line Voltage)—typical baseboard

and radiant

Fan Coil Unit

Gas—Direct Spark Ignition (DSI),

Intermittent Pilot (IP), and Standing

Pilot (SP)

Heat Pump

Hot Water Zone

Oil

Vent Damper

Warm Air Zone

a

If thermostat is not compatible with the system being controlled, the system will not operate. No hazard exists. The

thermostat will not be damaged unless it is used to directly control a line voltage system. For proper system operation, a

Honeywell R841 or R8239D1015 Isolating Relay must be added to the thermostat control circuit.

b

Consult manufacturer for installation requirements.

Installation Instructions for the Trained Service Technician.

Preparation

• The R8239D1015 Isolating Relay or R841 Silent Switching Center

must be installed in the thermostat control circuit.

• Compatible. Assure correct subbase identity is selected for fan

control.

• Compatible. If not using battery backup, assure that 24V control

transformer common is accessible for connection to thermostat

cable conductor and power to the transformer is not regularly

interrupted by high temperature or limit operation.

• Compatible. Assure correct subbase identity is selected for

fan control and changeover control (O terminal for cool and

B terminal for heat).

• Honeywell 2-wire valves are compatible.

• Some non-Honeywell 2-wire valves require an R8239D1015

Isolating Relay in the thermostat control circuit.

• Some 3-wire valves require an R8239A1052 Isolating Relay in the

thermostat control circuit.

• If not using battery backup, assure that the 24V control transformer

common is accessible for connection to thermostat cable conductor

and power to the transformer is not regularly interrupted by high

temperature, purge cycle, or limit operation.

• Honeywell damper motors are compatible.

• Some non-Honeywell damper motors require an R8239D1015

Isolating Relay in the thermostat control circuit.

amperage requirement.

• Most are compatible.

1

D.F. • Rev. 12-94 •

NOTE: Order Q682B Subbase separately.

Recycling Notice

M3375

This control contains mercury in a sealed tube. Do not

place control in the trash at the end of its useful life.

If this control is replacing a control that contains mercury

in a sealed tube, do not place your old control in the trash.

Contact your local waste management authority for in-

structions regarding recycling and the proper disposal of this

control, or of an old control containing mercury in a sealed

tube.

If you have questions, call Honeywell Inc. at 1-800-

468-1502.

Conditions/Compatibility

a, b

• ©Honeywell Inc. 1994 • Form Number 69-0642—1

M3375

a

a

a

Check control

69-0642—1