High Limit Controller - Honeywell W180 User Manual

W180 ZONE CONTROL SYSTEM
— Drywall without junction box (Fig. 30):
a. Make sure that the location chosen is clear of
studs and other possible obstructions behind the
drywall.
b. Place the back of the Touchpad on the wall at the
selected location and use it as a stencil to outline
the area of drywall to be cut out
c. Cut the opening for the S321A Touchpad.
d. Place the Touchpad in the opening and mark the
locations for the four mounting screws using the
outer four mounting holes.
e. Use a 3/16 in. [5 mm] drill bit to drill the four
starter holes for the plastic screw anchors.
f. Install the four plastic screw anchors in the starter
holes.
g. Run the 6-wire connecting cable from the drywall
cutout to the advance zoning controller, leaving a
minimum of 3 in. [76 mm] of wire exposed in the
cutout for connection to the Touchpad.
h. Connect the four Touchpad signal and power
wires to the 6-wire connecting cable (red wire for
input power, black wire for common, green and
yellow wires for signals) using wire nuts (Figs. 26
and 27). If more than three Touchpads are being
wired to the W180A Controller, see Fig. 28 for
auxiliary power wiring. If required, connect the
wiring between TotalHome
System (Fig. 29).
i. Mount the Touchpad in the drywall, using the
screws provided.
j. Position the trim ring on the Touchpad (note the
UP reference on the rear surface of the trim ring)
and snap it onto the Touchpad.
4. Wire the Touchpad as shown in the job drawings and
Fig. 47.
Fig. 30—Mounting S321A Touchpad in
drywall.
6 WIRE
CABLE
68-0139
®
System and W180
HOLE IN DRYWALL
PLASTIC SCREW
ANCHORS (4)
M3506
32

HIGH LIMIT CONTROLLER

NOTES:
1. Locate the high limit controller where it will be ex-
posed to average air temperature in the duct.
2. Do not locate the high limit controller near hot pipes
and cooling coils.
3. To support the bulb in the duct, use Bulb Holder
No. 107324A (supplied with the adjustable differen-
tial model; order separately for the fixed differential
model).
Install and wire the T675A Temperature Controller as
follows:
1. Mount the controller case as follows:
a. Remove the cover.
b. Use the case as a template and mark three screw-
hole locations on the mounting surface.
c. Punch or drill the holes.
d. Secure the T675A to the mounting surface with
the screws provided.
2. Install the sensing bulb in the duct as follows:
a. Drill a hole in the duct wall large enough to admit
the sensing bulb in the holder.
b. Using the holder as a template, mark and drill holes
for the bulb holder mounting screws (Fig. 31).
c. Break off the bulb holder to the desired length
Fig. 32).
NOTE: The holder should be long enough to hold
the sensing bulb in freely circulating air, away
from the duct wall.
d. Neatly coil any excess capillary tubing at the con-
troller or bulb holder.
e. Place the capillary tubing in the bulb holder chan-
nel and pinch together the top edges of the holder
at each segment (Fig. 33).
f. Insert the bulb and bulb holder into the duct
through the drilled hole (Fig. 31).
g. Secure the bulb holder to the duct wall with the
screws provided.
Wire the T675A according to the instructions provided
with the heating or cooling system and Fig. 34.
Fig. 31—T675A Temperature Controller
mounting.
CONTROLLED
AREA
SCREW
HOLES (2)
IN DUCT WALL
MOUNTING
SCREWS (2)
M8332