Carrier Gemini 38AU Series Installation, Start-Up And Service Instructions Manual page 15

CONVENIENCE OUTLETS
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or
death.
Units with convenience outlet circuits may use multiple dis-
connects. Check convenience outlet for power status before
opening unit for service. Locate its disconnect switch, if appro-
priate, and open it. Lock-out and tag-out this switch, if neces-
sary.
Two types of convenience outlets are offered on 38AU 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. 14.
Non-Powered Type
This type requires the field installation of a general-purpose 125-
volt 15-A 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 125-v power supply conductors into the bottom of the utili-
ty box containing the duplex receptacle. Maximum continuous
current for this type of convenience outlet (non-unit powered)
must not exceed 8 Amps.
Unit-Powered Type
A unit-mounted transformer is factory-installed to step down the
main power supply voltage to the unit to 115-v at the duplex re-
ceptacle. This option also includes a manual switch with fuse, lo-
cated in a utility box and mounted on a bracket behind the conve-
nience outlet; access is through the unit's control box access panel.
See Fig. 14.
Convenience
Outlet
GFCI
Pwd-CO
Fuse
Switch
Control Box
Access Panel
Fig. 14 — Convenience Outlet Location
The primary leads to the convenience outlet transformer are not
factory-connected. Selection of primary power source is a custom-
er-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 ser-
vice power to the unit when the unit disconnect switch or HACR
switch is open. Other connection methods will result in the conve-
nience outlet circuit being de-energized when the unit disconnect
or HACR switch is open. See Fig. 15.
UNIT
VOLTAGE
208,
230
460
575
Fig. 15 — Powered Convenience Outlet Wiring
The unit-powered convenience outlet has a 1000 VA rated trans-
former. Maximum continuous current must not exceed 8 Amps.
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 re-
ceptacle does not trip as required. Press the RESET button to
clear the tripped condition.
Fuse on power type: The factory fuse is a Bussman
T-15, non-renewable screw-in (Edison base) type plug fuse.
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or
Pwd-CO
death.
Transformer
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 Cir-
cuits, for use of convenience outlets.
1. Bussmann and Fusetron are trademarks of Cooper Technologies
Company.
15
CONNECT PRIMARY
AS CONNECTIONS
L1: RED + YEL
240
L2: BLU + GRA
L1: RED
480 Splice BLU + YEL
L2: GRA
L1: RED
600
L2: GRA
WARNING
TRANSFORMER
TERMINALS
H1 + H3
H2 + H4
H1
H2 + H3
H4
H1
H2
1 "Fusetron"