Carrier WeatherMaster Series Installation Instructions Manual page 19

Unit- - powered type: A unit- - mounted transformer is
factory- - installed to stepdown the main power supply
voltage to the unit to 115- - v 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. 22.
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. 23.
UNIT CONNECT
VOLTAGE AS CONNECTIONS
208, L1: RED +YEL
240
230 L2: BLU + GRA
L1: RED
460 480 Splice BLU + YEL
L2: GRA
L1: RED
575 600
L2: GRA
Fig. 23 - - Powered Convenience Outlet Wiring
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).
Test the GFCI receptacle by pressing the TEST button on
the face of the receptacle to trip and open the receptacle.
Check for proper grounding wires and power line phasing
if the GFCI receptacle does not trip as required. Press the
RESET button to clear the tripped condition.
PRIMARY TRANSFORMER
TERMINALS
H1 + H3
H2 + H4
H1
H2 + H3
H4
H1
H2
Fuse on power type: The factory fuse is a Bussman
"Fusetron" T- - 15, non- - renewable screw- - in (Edison base)
type plug fuse.
Installing Weatherproof
while-in-use cover for the factory-installed convenience
outlets is now required by UL standards. This cover
cannot be factory-mounted due to its depth; it must be
installed at
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
CONVENIENCE OUTLET. LOCK- - OUT AND TAG- - OUT
ALL POWER.
Remove the blank cover plate at the convenience outlet;
discard the blank cover.
Loosen the two screws at the GFCI duplex outlet, until
approximately
exposed. Press the gasket over the screw heads. Slip the
backing plate over the screw heads at the keyhole slots
and align with the gasket; tighten the two screws until
snug (do not over-tighten).
Mount the weatherproof cover to the backing plate as
shown in Fig. 24. Remove two slot fillers in the bottom of
the cover to permit service tool cords to exit the cover.
Check for full closing and latching.
COVER – WHILE-IN-USE
WEATHERPROOF
C08283
Fig. 24 - - Weatherproof Cover Installation
Using unit- - mounted convenience outlets: Units with
unit- - mounted convenience outlet circuits will often
require that two disconnects be opened to de- - energize all
power to the unit. Treat all units as electrically energized
until the convenience outlet power is also checked and
de- - energization is confirmed. Observe National Electrical
Code Article 210, Branch Circuits, for use of convenience
outlets.
19
Cover:
A
unit installation. For
ALL POWER TO
1
/ in. (13 mm) under screw heads are
2
RECEPTACLE
NOT INCLUDED
BASE PLATE FOR
GFCI RECEPTACLE
weatherproof
shipment, the
UNIT AND
C09022