Honeywell T874 Benutzerhandbuch

7

60-2485—8

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 

the Honeywell Customer Response Center at 

1-800-468-1502.

1. Read these instructions carefully. Failure to follow them 

could damage the product or cause a hazardous condi-

tion.

2. Check the ratings given on the product to make sure the 

product is suitable for your application.

3. Installer must be a trained, experienced service techni-

cian.

4. After installation is complete, check out product opera-

tion as provided in these instructions.

1.

Disconnect power supply before beginning instal-

lation to prevent electrical shock or equipment 

damage.

2.

Do not short across coil terminals on relay. This 

can burn out thermostat heat anticipator.

3.

To prevent interference with the thermostat link-

age, keep wire length to a minimum and run wires 

as close as possible to the subbase. 

4.

Do not overtighten thermostat captive mounting 

screws because damage to subbase threads can 

result.

Install the 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 can be affected by:

— drafts or dead spots behind doors, in corners or under 

cabinets.

— hot or cold air from ducts.

— radiant heat from the sun, fireplace, or appliances.

— concealed pipes and chimneys.

— unheated (uncooled) areas such as an outside wall behind 

the thermostat.

The subbase can be mounted on a vertical outlet box, 

horizontal outlet box or directly on the wall.

1. If the subbase is mounted on a vertical outlet box, order 

Honeywell part no. 193121A Adapter Assembly. See 

Fig. 4. The assembly includes an adapter ring, two 

screws and a cover plate to cover marks on the wall. 

Install the ring and cover plate on the vertical outlet box.

NOTE: For a wall installation, hold subbase in position and 

mark holes for anchors. See Fig. 5. Wall anchors 

must be obtained from local hardware store. Be care-

ful that the wires do not fall back into the wall open-

ing. Set aside subbase. Drill four 

3/16 in. (4.8 mm) holes and gently tap anchors into 

the holes until flush with the wall.

2. Pull wires through the cover plate (if used) and subbase 

cable opening. See Fig. 6.

3. Secure the cover plate (if used) and subbase with the 

screws provided. Do not fully tighten the subbase 

screws.

Level the subbase using a spirit level, see Fig. 7, and firmly 

tighten subbase mounting screws. The subbase mounting 

holes provide for minor out-of-level adjustments.

M6009

VERTICAL 
OUTLET
BOX

ADAPTER
RING

COVER 
PLATE

MOUNTING
SCREWS (2)

1

SUBBASE

SUBBASE
MOUNTING  SCREWS (2) 

HORIZONTAL
OUTLET
BOX

1

2

2

1    NOT INCLUDED WITH UNIT.

2    ACCESSORY PART AVAILABLE (193121A).

THERMOSTAT

CAPTIVE
MOUNTING SCREWS (2)

50    60    70    80

50    60    70    80

HEAT

COOL

THERMOSTAT 
COVER

50    60    70    80