Honeywell PC8900A Manual page 19

3. Remove the PC8900A from the wiring wallplate by
pulling 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
properly 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.
WALL
ANCHORS
(3)
1
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.
WIRES THROUGH
WALL OPENING
CHOOSE THREE MOUNTING HOLES
THAT BEST FIT APPLICATION.
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
application.
8. Tighten the mounting screws.
9. Reinstall the PC8900A on the wallplate by pressing the
PC8900A directly onto the wallplate.
205224A
WALL COVER PLATE
PC8900 WIRING
PLATE
1
PC8900
COMFORT
CENTER
CONTROL
PANEL
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
operation. 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
dimming circuits, electric motors or welding
equipment.
— Avoid poor wiring connections.
— Avoid intermittent or missing building earth ground.
19
MOUNTING
SCREWS (3)
M7512A
68-0173—3