Honeywell T8411R User Manual 2

Heat Pump Thermostat

The T8411R Heat Pump Thermostat provides 24V control of two-stage heating and one-stage cooling heat pump system with manual changeover from heat to cool. First stage heating and cooling cycle rates are fixed at 3 cph. Second stage heating cycle rate is selectable at 3, 4, 5, 6, 9 or 12 cph. Temperature indication can be set for °F or °C.

The T8411R Heat Pump Thermostat is powered directly from the system transformer. Batteries are not required because setpoints are held permanently by non-volatile memory.

The T8411R includes a thermostat, wallplate (for wiring and mounting thermostat), and owner’s guide. A 7 3/8 in. x 5 3/4 in. (188mm x146 mm) decorator cover plate (for covering wall marks) is available separately. Order Honeywell part no. 209649A (taupe color).

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.

Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old control containing mercury in a sealed tube.

INSTALLATION

When Installing this Product…

1. Read these instructions carefully. Failure to follow them could 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 installation is complete, check out product operation as provided in these instructions.

T8411R Electronic

INSTALLATION INSTRUCTIONS

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 the sun or appliances. — concealed pipes and chimneys. — unheated (uncooled) areas such as an outside wall

behind the thermostat.

This thermostat is a precision instrument and was carefully adjusted at the factory. Handle it carefully.

Mounting Wallplate to Wall

IMPORTANT

Level only for appearance. The thermostat functions normally even when not level.

Mount wallplate, T8411R and the screws provided (see Fig. 2) as follows:

1. Place the wallplate at the desired location on the wall.

2. Use a pencil to mark the mounting holes.

3. Remove the wallplate from the wall and drill two

3/16 in. holes in the wall (if drywall) or two 7/32 in. holes for firmer material such as plaster or wood.

4. Gently tap the anchors (provided) into the holes until flush with the wall.

5. Position the wallplate over the holes.

6. Pull the thermostat wire through the wallplate

entrance hole.

7. Fasten the wallplate to the wall using the anchors and screws provided.

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T8411R ELECTRONIC HEAT PUMP THERMOSTAT

Fig. 1. Typical location of thermostat.

WALL

MOUNTING SCREWS (2)

WHEN USING WALL ANCHORS, DRILL 3/16 INCH HOLES FOR DRYWALL, 7/32 INCH HOLES FOR PLASTER OR WOOD.

WALL ANCHORS (2)

WALLPLATE

M12202A

Fig. 2. Mounting wallplate to wall.

Wiring

IMPORTANT

Use an 18-gauge maximum wire for wiring the T8411R Thermostat.

All wiring must comply with local electrical codes and ordinances.

CAUTION

Electrical Shock or Equipment Damage Hazard. Can shock individuals or short equipment circuitry.

Disconnect power supply before installation.

YES

5 FEET

[1.5 METERS]

The shape of the terminals permits insertion of straight or wraparound wiring connections; either method is acceptable. See Fig. 3.

TERMINAL SCREW

M11338

FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM)

FOR WRAPAROUND STRIP 7/16 IN. (11 MM)

NOT ALL MODELS HAVE BOTH O AND B TERMINALS.

Fig. 3. Wiring connections.

NOTE: To ensure proper mounting of thermostat,

restrict all wiring to the shaded area. See Fig. 4.

M11334A

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