Step 5 - Make Electrical Connections - Payne PA1R Series Installation, Start-Up And Service Instructions Manual

A. Positioning
Maintain clearance around and above unit to provide proper
airflow and service access. See Fig. 7. A properly positioned
unit will have the following clearances:
tween roof curb and base rails on each side and front of unit;
1 5 ⁄ -in. clearance between roof curb and rear of unit. (See
32
Fig. 2, section C-C.)
Do not install unit in an indoor location. Do not locate unit
air inlets near exhaust vents or other sources of contam-
inated air.
Although unit is weatherproof, guard against water from higher
level runoff and overhangs.
After unit is in position, remove shipping materials and top
crating.
V. STEP 5 — MAKE ELECTRICAL CONNECTIONS
WARNING: Unit cabinet must have an uninterrupted,
unbroken electrical ground to minimize the possibility
of personal injury if an electrical fault should occur. This
ground may consist of electrical wire connected to
unit ground lug in control compartment, or conduit
approved for electrical ground when installed in
accordance with NEC, ANSI (American National
Standards Institute)/NFPA, latest edition (in Canada,
Canadian Electrical Code CSA [Canadian Standards
Association] C22.1), and local electrical codes. Failure
to follow this warning could result in the installer
being liable for personal injury of others.
A. Disconnect Box Location
The field-supplied disconnect box may be mounted on the unit's
end panel or the corner post. Mount disconnect box on the
left side of the rating plate when mounting on the unit's end
panel. Do not mount the disconnect box over the unit rating
plate. When mounting disconnect box on corner post, secure
disconnect box to corner post and condenser coil top cover.
A disconnect box mounting space is available when an
optional or accessory condenser coil grille is used. Mount the
disconnect on the sheet metal provided with the condenser
coil grille. The sheet metal is located adjacent to the corner
post on the left side of the power wiring access panel.
B. Field Power Supply
All units except 208/230-v units are factory wired for the volt-
age shown on the nameplate. If the 208/230-v unit is to be
connected to a 208-v power supply, the transformer must be
rewired by moving the black wire from the 230-v orange wire
on the transformer and connecting it to the 200-v red wire
from the transformer. The end of the orange wire must then
be insulated.
Refer to unit label diagram for additional information. Leads
are provided for field wire connections. Use copper conduc-
tors only when splice connectors are used.
When installing units, provide a disconnect per NEC.
All field wiring must comply with NEC and local
requirements.
Install field wiring as follows:
1. Install conduit between disconnect and power wiring
access panel. See Fig. 8.
2. Install power lines to power wiring leads as shown in
Fig. 9.
3. Power wiring leads are located inside power wiring
access panel.
1 ⁄ -in. clearance be-
4
OUTDOOR AIR
OPENING PANEL
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate (see
Table 2). On 3-phase units, voltages between phases must be
balanced within 2% and the current within 10%. Use the for-
mula shown in the legend for Table 2, Note 2 to determine
the percent of voltage imbalance. Operation on improper line
voltage or excessive phase imbalance constitutes abuse and
may cause damage to electrical components. Such operation
would invalidate any applicable warranty.
—7—
CONTROL BOX
UNIT DISCONNECT ACCESS PANEL
LOCATION
(DISCONNECT
NOT SHOWN)
FIELD CONTROL
WIRING RACEWAY POWER WIRING
(HIDDEN) SIDE PANEL
REFRIGERANT SERVICE
FILTER PORT ACCESS PANEL
ACCESS PANEL (NOT SHOWN)
COMPRESSOR
CONDENSER
(COMPRESSOR COIL
ACCESS PANEL
NOT SHOWN)
Fig. 8 — Typical Component Location
LOW-VOLTAGE EVAPORATOR
ACCESS PANEL FAN ACCESS
PANEL
END PANEL
(HIDDEN)
KNOCKOUT
OPENING
POWER WIRING
ACCESS PANEL
CONTROL BOX
ACCESS COVER
CONDENSER COIL
TOP COVER
LEFT RIGHT
CORNER
CORNER
POST POST
CONTROL BOX
CONDENSER
COIL