Carrier WeatherMaster 50HCQ, Руководство по установке

Страница: 18 / 56

18
8. Turn the handle to the OFF position with red arrow
pointing at OFF.
9. Install the handle on to the painted cover horizontally
with the red arrow pointing to the left.
10. Secure the handle to the painted cover with (2) screws
and lock washers supplied.
11. Engaging the shaft into the handle socket, re−install
(3) hex screws on the NFD enclosure.
12. Re−install the unit front panel.
C12279
Fig. 21 − Handle and Shaft Assembly for NFD
Units Without Factory−Installed
Non− Fused Disconnect —
When installing units, provide a disconnect switch per
NEC (National Electrical Code) of adequate size.
Disconnect sizing data is provided on the unit informative
plate. Locate on unit cabinet or within sight of the unit per
national or local codes. Do not cover unit informative
plate if mounting the disconnect on the unit cabinet.
All Units −
All field wiring must comply with NEC and all local
codes. Size wire based on MCA (Minimum Circuit Amps)
on the unit informative plate. See Fig. 18 and the unit
label diagram for power wiring connections to the unit
power terminal blocks and equipment ground. Maximum
wire size is #2 ga AWG per pole.
Provide a ground−fault and short−circuit over−current
protection device (fuse or breaker) per NEC Article 440
(or local codes). Refer to unit informative data plate for
MOCP (Maximum Over−current Protection) device size.
All field wiring must comply with the NEC and local
requirements.
All units except 208/230-v units are factory wired for the
voltage shown on the nameplate. If the 208/230-v unit is
to be connected to a 208-v power supply, the control
transformer must be rewired by moving the black wire
with the
1
/
4
-in. female spade connector from the 230−v
connection and moving it to the 208-v
1
/
4
-in. male
terminal on the primary side of the transformer. Refer to
unit label diagram for additional information. Field power
wires will be connected line−side pressure lugs on the
power terminal block or at factory−installed option
non−fused disconnect.
NOTE: Check all factory and field electrical connections
for tightness.
Convenience Outlets —
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Units with convenience outlet circuits may use
multiple disconnects. Check convenience outlet for
power status before opening unit for service. Locate
its disconnect switch, if appropriate, and open it.
Tag−out this switch, if necessary.
!
WARNING
Two types of convenience outlets are offered on 50HCQ
models: Non−powered and unit−powered. Both types
provide a 125−volt GFCI (ground−fault
circuit−interrupter) duplex receptacle rated at 15−A
behind a hinged waterproof access cover, located on the
end panel of the unit. See Fig. 22.
Convenience
Outlet
GFCI
Pwd-CO
Fuse
Switch
Pwd-CO
Transformer
Control Box
Access Panel
C08128
Fig. 22 − Convenience Outlet Location
Installing Weatherproof Cover: A weatherproof
while-in-use cover for the factory-installed convenience
outlets is now required by UL standards. This cover
cannot be factory-mounted due its depth; it must be
installed at unit installation. For shipment, the
convenience outlet is covered with a blank cover plate.
The weatherproof cover kit is shipped in the unit’s control
box. The kit includes the hinged cover, a backing plate
and gasket.
DISCONNECT ALL POWER TO UNIT AND
CONVENIENCE OUTLET.
Remove the blank cover plate at the convenience outlet;
discard the blank cover.
Loosen the two screws at the GFCI duplex outlet, until
approximately
1
/
2
-in (13 mm) under screw heads are
50HCQ