Honeywell T8195B User Manual

T8195B/Q682B,C, Y8224A

M3375

Heating or Cooling and Heating/Cooling

New Construction Thermostat,

Wallplate and Subbase

Installation Instructions for the Trained Service Technician.

Preparation

Recycling Notice

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 most heating, cooling, or heating/cooling systems. Refer to Table 1 for thermostat and system compatibility information.

TABLE 1—THERMOSTAT AND SYSTEM COMPATIBILITY.

Type of Heating System

to be Controlled Conditions/Compatibility

Electric (Line Voltage)—typical baseboard and radiant

Fan Coil Unit • Compatible. Assure correct subbase identity is selected for fan control. Gas—Direct Spark Ignition

(DSI), Intermittent Pilot (IP), and Standing Pilot (SP)

Heat Pump • Compatible. Assure correct subbase identity is selected for fan control and

Hot Water Zone • Honeywell 2-wire valves are compatible.

Oil • Assure that the 24V control transformer common is accessible for connection

Vent Damper • Honeywell damper motors are compatible.

Warm Air Zone • Most are compatible.

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.

Consult manufacturer for installation requirements.

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

• Compatible. 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.

changeover control (O terminal for cool and B terminal for heat). Jumper Y to W for heat pump compressor control.

• 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.

to thermostat cable conductor and power to the transformer is not regularly interrupted by high temperature, purge cycle, or limit operation.

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

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 instructions 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 1-800468-1502.

a, b

D.F. • Rev. 11-94 • • ©Honeywell Inc. 1994 • Form Number 69-0564—3

1 69-0564—3

M3375

Installation

WHEN INSTALLING THIS PRODUCT…

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 op-

eration 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.

Fig. 1—Unpack thermostat.

CAPTIVE MOUNTING SCREWS

1 0

LIFT COVER

THERMOSTAT COVER

CAUTION

1. Disconnect power supply to prevent electrical shock or equipment damage.

2. To prevent interference with the thermostat linkage, keep wire length to a minimum and run wires as close as possible to the subbase.

3. Do not overtighten thermostat captive mounting screws because damage to subbase threads can result.

4. Do not short across coil terminals on relay. This can burn out the thermostat heat anticipator.

LOCATION

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.

IMPORTANT: This control requires an additional con-

ductor to the control transformer common (e.g., a typical 2-wire heating system requires three wires be pulled, a 4-wire heating/cooling requires five wires).

UNPACK THERMOSTAT

Handle your new thermostat carefully; rough handling may interfere with its accuracy. Before unpacking, refer to Fig. 1.

Remove and discard the shipping wrap.

IMPORTANT: Save package of screws and instructions

for the homeowner.

Remove the thermostat cover by lifting from the bottom. Set aside cover until needed later.

Carefully remove the material protecting the mercury switch bulb.

Loosen two captive mounting screws, and separate wallplate (if provided) from back of thermostat base.

MOUNT WALLPLATE OR SUBBASE Wall Mounting (Fig. 2)

Hold the wallplate or subbase in position on wall (Fig. 2).

Mark holes on the wall for anchors. Use spirit level to make sure the wallplate or subbase is level.

THERMOSTAT BASE

REMOVE PACKING MATERIAL

M8605

Drill 3/16-in. holes, and gently tap anchors into holes

until flush with the wall.

Pull wires through the large wiring hole in the wallplate or

subbase.

Loosely fasten the wallplate or subbase to the wall with

the three screws. Do not completely tighten the screws.

Carefully level the wallplate or subbase (Fig. 3), and

firmly tighten the screws.

Fig. 2—Mounting wallplate or subbase to wall.

3 SCREW HOLES WITH PLASTIC ANCHORS

FAN

HEATING/COOLING SUBBASE

3 SCREW HOLES WITH PLASTIC ANCHORS

HEATING-ONLY WALLPLATE

AUTO OFF

HEATON

COOL

M1552A

M857

69-0564—3 2

Fig. 3—Leveling methods for wallplate or subbase.

or heating/cooling equipment manufacturer. If not available, refer to the Typical Wiring Diagrams section at the end of this publication.

WIRE WALLPLATE OR SUBBASE

PLUMB LINE

PLUMB BOB OR WEIGHT

FAN

SPIRIT LEVEL

AUTO OFF

HEATON

COOL

M1555

nections to prevent electrical shock or equipment damage.

NOTE: All wiring must comply with local electrical codes

Wallplate (Heating or Cooling Systems)

necessary.

terminals. For cooling-only systems, connect wires R, Y, and C terminals. Firmly tighten the screws. The system lowvoltage transformer powers the timer (Fig. 11).

or nonflammable insulation to prevent drafts from affecting

Outlet Box Mounting (Fig. 4)

thermostat operation.

Use a horizontally mounted outlet box if possible. If a

vertical outlet box is used, mount the wallplate or subbase on

Subbase (Heating/Cooling Systems)

a 202689A Cover Plate Assembly (ordered separately). Follow the instructions provided with the cover plate assembly.

necessary.

Align the wallplate or subbase mounting holes on the

outlet box and loosely fasten with two screws.

Carefully level the wallplate or subbase (Fig. 3), and

firmly tighten the screws.

Fig. 4—Mounting wallplate or subbase on horizontal outlet box.

subbase. If labels do not agree with your new subbase, refer to Table 2 and the installation instructions furnished with the subbase.

Follow the instructions provided by the heating, cooling

Disconnect the power supply before making wiring con-

and ordinances.

Refer to Fig. 5 and strip the thermostat wire insulation as

For heating-only systems, connect wires to R, W, and C

Push excess wire back into the wall. Plug the hole in the wall with nonhardening caulk, putty,

Refer to Fig. 5, and strip the thermostat wire insulation as

Connect the wires to the corresponding terminals on the

EXISTING HORIZONTAL OUTLET BOX

FAN

AUTO OFF

HEATON

HEATING/ COOLING SUBBASE

COOL

M1553A

VERTICAL OUTLET BOX

NOT INCLUDED WITH UNIT.

ACCESSORY PARTS AVAILABLE.

EXISTING HORIZONTAL OUTLET BOX

WALLPLATE

M856

SUBBASE OR WALLPLATE

ADAPTER RING

MOUNTING SCREWS (2)

COVER PLATE

M1554A

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