User's Manual

ManualsBrandsHoneywell ManualsDomestic AppliancesThermostat perfect climate comfort center control system

19 68-0173—3

3. Remove the PC8900A from the wiring wallplate by pull-

ing the PC8900A straight off the wallplate.

4. Position the PC8900A Wiring Plate on the wall.

5. Level the wiring plate (for appearance only) using the

posts on top of the wiring plate; device functions prop-

erly even when not level.

6. Remove wiring plate from wall and drill 3/16 in. holes in

wall (if drywall) as marked. For firmer material such as

plaster or wood, drill 7/32 in. holes. Gently tap anchors

(provided) into drilled holes until flush with the wall.

NOTE: When using a wall cover plate, be sure to

place the wall cover plate between the wall

and the wiring plate.

7. Position wiring plate over holes in wall or outlet box,

pulling wires through wiring opening. Loosely insert

three mounting screws into holes that best fit the appli-

cation.

8. Tighten the mounting screws.

9. Reinstall the PC8900A on the wallplate by pressing the

PC8900A directly onto the wallplate.

Fig. 23. Mounting PC8900A Wiring Plate and 205224A Wall Cover Plate to wall.

Wiring the PC8900A

CAUTION

Keep wiring at least one foot away from large

inductive loads such as motors, line starters,

lightning ballasts and large power distribution

panels. Failure to follow these wiring practices can

introduce electrical interference (noise), which can

cause erratic system operation. Use shielded

cable to reduce interference if rerouting of wiring

is not possible. Ground the shielded cable only to

GND terminal on W8900A-C.

IMPORTANT

Erratic temperature readings can occur as a result of

any of the wiring practices described below. These

practices must be avoided to assure proper opera-

tion. Use shielded cable to reduce interference if

rerouting of wiring is not possible.

— Do not route thermostat wiring with building power

wiring, next to control contactors or near light dim-

ming circuits, electric motors or welding equipment.

— Avoid poor wiring connections.

— Avoid intermittent or missing building earth ground.

CHECK

SYST

WIRES THROUGH

WALL OPENING

205224A

WALL COVER PLATE

PC8900 WIRING

PLATE

MOUNTING

SCREWS (3)

PC8900

COMFORT

CENTER

CONTROL

PANEL

M7512A

CHOOSE THREE MOUNTING HOLES

THAT BEST FIT APPLICATION.

WALL

ANCHORS

(3)