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W180 ZONE CONTROL SYSTEM
GENERAL
Check the equipment for damage immediately upon
receipt and note any visible damage with the carrier. Un-
pack the W180A Controller and check to see that nothing
was jarred loose during shipping.
NOTE: The following procedures explain how to install the
hardware in pre-existing buildings. See Fig. 14 and
Table 9 for prewiring information.
W180A CONTROLLER
Fig. 2 shows the W180A Controller enclosure mounting
hole locations. The W180A Controller enclosure can be
surface mounted in any dry, accessible area. Avoid areas of
excessive heat and/or humidity. Mount the W180A Con-
troller enclosure as follows:
CAUTION
Do not allow material from the wall (for example,
wood or metal shavings) to enter the enclosure.
1. If mounting the W180A Controller enclosure on a wall
that does not have studs 16 inches OC, obtain a 3/4-inch
thick piece of plywood and trace the outline of the keyhole
slots and round holes onto the plywood and secure the
plywood to the supporting wall as indicated in the job
drawings. If mounting the W180A Controller enclosure on
a wall with studs 16 inches OC, position the enclosure on
the studs as indicated in the job drawings and trace the
outline of the keyholes on the studs.
2. Start a 3/4-inch wood screw in each of the top
keyholes.
3. Hang the W180A Controller enclosure from the
screws.
4. Start a 3/4-inch wood screw in each of the remaining
holes.
5. Tighten all wood screws.
68-0139
Installation and Wiring
6. Remove all appropriate knockouts and install bush-
ings (obtained locally) to protect the wires entering the
enclosure.
7. Connect the field wiring to the W180A Controller
termination board as shown on the job drawings and Fig. 21.
NOTES:
a. When more than one wire must be connected to a
terminal, use the same gauge wires.
b. See Fig. 22 for terminal designations.
c. See Fig. 23 for proper power supply isolation
when wiring two HVAC systems.
Fig. 21—W180A Controller power source and
ground wiring.
POWER TO
MAIN BOARD
24 VAC TRANSFORMER
40 VA MINIMUM
EARTH GROUND
CAUTION:
1. EARTH GROUND CONNECTION IS MANDATORY.
2. EARTH GROUND MUST BE A RELIABLE CONNECTION:
– COLD WATER PIPE
– GROUNDING ROD
– BUILDING METAL FRAMEWORK
3. THE THIRD WIRE GROUND IN THE ELECTRICAL WIRING OF A
BUILDING SHOULD NOT BE USED BECAUSE IT IS DIFFICULT AND
OFTEN IMPOSSIBLE TO ESTABLISH ITS RELIABILITY
AS AN EARTH GROUND.
4. TO AVOID POSSIBLE DAMAGE TO THE W180 CONTROLLER, DO NOT
CONNECT THE EARTH GROUND TO THE SECONDARY SIDE OF THE
24 VAC TRANSFORMER.
26
24 VAC
EARTH GND
18 AWG SOLID
OR STRANDED
100 FT. [30 M] MAX.
M8166A
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