Carrier Bryant Payne day and night 585A/YAC - Low-Voltage Wiring; Unit Startup Preparation; Pre-Startup Inspection and Checks

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HINGED
RETURN
AIR
GRILLE
\
* 5
WEATHERPROOF FLASHING
PARALLEL FLOW TRANSITION
AND FI L TER P LENUM (FIELD-
SUPPLIED)
7
FILTER ACCESS PANEL
(FIELD-SUPPLIED)
HOUSE FLOOR SLAB
Figure 10—Typical Ground Level.lnstallation Through Single Closet
A7631 2
See Figure 2 for location of panel and hole.
NOTE: A suitable conduit fitting should be mounted to the
unit at this hole.
NOTE: The fused disconnect may be mounted directly on
the control corner panel. Tb mount the disconnect on this
panel, align one of the disconnect box knockouts with the
unit high-voltage inlet hole and secure the box to the panel.
Route the wiring from the disconnect through the aligned
knockout and unit inlet.
WARNING: Ensure that the drill does not damage any com¬
ponents when drilling through the panel.
2. Run high-voltage leads to unit control box and connect
leads to contactor. See unit wiring label and Figure 11.
NOTE: On 3-phase units, the third power lead is connected
to the brown high-voltage pigtail lead. See unit wiring label
and Figure 11.
When the 018050-size unit is to be operated at 208 volts, it
must be rewired at the Molex plug connector of both the
evaporator and condenser motor, and at the unit trans¬
former.
WARNING: Make sure the power supply to the unit is
switched OFF before making any wiring changes.
NOTE: Molex plug connector leads may be disconnected by
inserting a small screwdriver, or similar bladed tool, into the
connector and depressing the catch on the terminal. When
inserting a lead, be sure the catch on the terminal is seated
into the connector.
The 018050-size unit evaporator motor leads are wired at the
connector as shown in Figure 12. The yellow and orange
leads are interchanged when operating at 208 volts. See unit
wiring label. See Figure 7 for connector location.
The 018050-size unit condenser motor must have the red and
black motor leads changed at the plug connector when
operating at 208 volts. See the unit wiring label. On the
018050-size unit, the orange lead running to the primary
side of the unit transformer must be connected to the red
transformer tap when operating at 208 volts. See the unit
wiring label.
B. Low-Voltage Connections
CAUTION: When thermostat leads are run in the satt; con¬
duit with the high-voltage leads, they must be insulated for
the highest voltage"contained with the conduit. ijgs
If the low-voltage leads from the thermostat are run sepa¬
rately, enter the unit through the grommeted hole provided
in the control comer panel. See Figure 2 for the hole loca¬
tion.
Connect the low-voltage thermostat leads to the flagged
pigtail leads that run through a hole in the bottom of the
unit control box. See Figures 7 and 11.
NOTE: Connect thermostat to unit using NO. 18 AWG “col¬
or-coded” insulated wires. If thermostat is located more than
50 feet from unit, use No. 16 AWG wire.
Use thermostats and subbases shown in Figure 11. Set heat
anticipator to 0.8 amps.
VI. PREPARING UNIT FOR STARTUP
Proceed as follows to prepare the unit for startup:
1. Remove all service access panels and check for shipping
damages, such as broken lines, loose parts, disconnected
wires, etc.
2. Read and follow instructions on all WARNING, CAU¬
TION, AND INFORMATION labels and tags attached
to unit; such as motor rotation labels, blower rotation
labels, and vent instruction tag.
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