Honeywell Y8196A Installation Manual

Honeywell Y8196A Installation Manual

Check thermostat and subbase 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 virtually all heating, cooling or heating/cooling systems. Refer to Table 1 for additional thermostat compatibility information.


Type of Heating System to be Controlled


Electric (Line Voltage)—typical baseboard and radiant

  • The R8239D1015 Isolating Relay or R841 Silent Switching Center must be installed in the thermostat controlcircuit.a

Gas—Direct Spark Ignition (DSI), Intermittent Pilot (IP), and Standing Pilot (SP)

  • Compatible

Heat Pump

  • Compatible. Assure correct subbase identity is selected for control and changeover control (O terminal for cool and B terminal for heat). Jumper Y to W for heat pump compressor control.

Hot Water Zone

  • Honeywell 2-wire valves are compatible.
  • Some non-Honeywell 2-wire valves require an R8239D1015 Isolating Relay in the thermostat controlcircuit.a
  • Some 3-wire valves require an R8239A1052 Isolating in the thermostat control circuit.a, b


  • Compatible

Vent Damper

  • Honeywell damper motors are compatible.
  • Some non-Honeywell damper motors require an R8239D1015 Isolating Relay in the thermostat control circuit.a Check control amperage requirement.

Warm Air Zone

  • Most are compatible.

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. A Honeywell R841 or R8239D1015 Isolating Relay must be added to the thermostat control circuit for proper system operation.
b Consult manufacturer for installation requirements. 

Honeywell Y8196A Installation


  1. Read these instructions carefully. Failure to follow them could cause a hazardous condition.
  2. Installer must be a trained experienced service technician.
  3. After installation is complete, check out product operation as provided in these instructions.

IMPORTANT: An incorrectly leveled subbase will cause the temperature control to deviate from setpoint. It is not a calibration problem.

Locate thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. Do not mount the thermostat where it may be affected by—

  • —drafts, or dead spots behind doors and in corners.
  • —hot or cold air from ducts.
  • —radiant heat from the sun or appliances.
  • —concealed pipes and chimneys.
  • —unheated (uncooled) areas such as an outside wall behind the thermostat.

Run wires from the heating, cooling, or heating/cooling equipment to the new thermostat location.

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Honeywell Y8196A Installation Manual

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