Carrier WeatherMaster 50HCQA04, Service And Maintenance Instructions, Page: 21 / 98

21
CONVENIENCE OUTLETS
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Units with convenience outlet circuits can use
multiple disconnects. Check convenience outlet for
power status before opening unit for service. Locate
its disconnect switch, if appropriate, and open it.
Apply lockout/tagout to this switch, if necessary.
!
WARNING
Convenience Outlets: Two types of convenience outlets are
offered on 50HCQ models: Non--powered and unit--powered.
Both types provide a 125VAC/15A Ground--Fault Circuit
Interrupter (GFCI) duplex receptacle behind a hinged
waterproof access cover, located on the end panel of the
unit. See Fig. 28.
Convenience
Outlet
GFCI
Pwd-CO
Fuse
Switch
Pwd-CO
Transformer
Control Box
Access Panel
C08128
Fig. 28 -- 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. The cover 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.
NOTE
: DISCONNECT ALL POWER TO UNIT AND
CONVENIENCE OUTLET. Use approved lockout/tagout
procedures.
1. Remove the blank cover plate at the convenience out-
let; discard the blank cover.
2. Loosen the two screws at the GFCI duplex outlet, un-
til approximately
1
/
2
-in (13 mm) under screw heads
are exposed.
3. Press the gasket over the screw heads. Slip the back-
ing plate over the screw heads at the keyhole slots
and align with the gasket; tighten the two screws until
snug (do not over-tighten).
4. Mount the weatherproof cover to the backing plate as
shown in Fig. 29.
5. Remove two slot fillers in the bottom of the cover to
permit service tool cords to exit the cover.
6. Check cover installation for full closing and latching.
TOP
TO
P
TOP
WET LOCATIO
NS
W
ET
L
OC
AT
IO
NS
COVER - WHILE-IN-USE
WEATHERPROOF
BASEPLATE FOR
GFCI RECEPTACLE
GASKET
GFCI RECEPTACLE
NOT INCLUDED
C09022
Fig. 29 -- Weatherproof Cover Installation
Non--powered type — This type requires the field
installation of a general--purpose 125VAC/15AC circuit
powered from a source elsewhere in the building. Observe
national and local codes when selecting wire size, fuse or
breaker requirements and disconnect switch size and
location. Route 125VAC power supply conductors into the
bottom of the utility box containing the duplex receptacle.
Unit--powered type — A unit--mounted transformer is
factory--installed to step--down the main power supply
voltage to the unit to 115VAC at the duplex receptacle.
This option also includes a manual switch with fuse,
located in a utility box and mounted on a bracket behind
the convenience outlet; access is through the unit’s control
box access panel. See Fig. 28.
The primary leads to the convenience outlet transformer
are not factory--connected. Selection of primary power
source is a customer--option. If local codes permit, the
transformer primary leads can be connected at the
line--side terminals on the unit--mounted non--fused
disconnect or HACR breaker switch. This will provide
service power to the unit when the unit disconnect switch
or HACR switch is open. Other connection methods will
result in the convenience outlet circuit being de--energized
when the unit disconnect or HACR switch is open. See
Fig. 30.
Duty Cycle — the unit--powered convenience outlet has a
duty cycle limitation. The transformer is intended to
provide power on an intermittent basis for service tools,
lamps, etc; it is not intended to provide 15 amps loading
for continuous duty loads (such as electric heaters for
overnight use). Observe a 50% limit on circuit loading
above 8 amps (i.e., limit loads exceeding 8 amps to 30
minutes of operation every hour).