Carrier Gemini 38AU 07 Series Installation, Start-Up And Service Instructions Manual page 16

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 CONNECT
VOLTAGE AS
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. 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.
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or
death.
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.
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
1. Bussmann and Fusetron are trademarks of Cooper Technologies
Company.
PRIMARY TRANSFORMER
CONNECTIONS TERMINALS
H1 + H3
H2 + H4
H1
H2 + H3
H4
H1
H2
"Fusetron"
1
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 CONVE-
NIENCE OUTLET.
Remove the blank cover plate at the convenience outlet; discard
the blank cover.
Loosen the two screws at the GFCI duplex outlet, until approxi-
mately / -in. (13 mm) under screw heads are exposed. Press the
1
2
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 overtighten).
Mount the weatherproof cover to the backing plate as shown in
Fig. 16. Remove two slot fillers in the bottom of the cover to per-
mit service tool cords to exit the cover. Check for full closing and
latching.
COVER - WHILE-IN-USE
WEATHERPROOF
Fig. 16 — Weatherproof Cover Installation
ALL UNITS
Voltage to compressor terminals during operation must be within
voltage range indicated on unit nameplate. See Tables 14-17 (on
pages 18-19). On 3-phase units, voltages between phases must be
balanced within 2% and the current within 10%. Use the formula
shown in the legend for Tables 14-17, Note 4 (see page 19) to de-
termine 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 Carrier warranty.
FIELD CONTROL WIRING
The 38AU unit control voltage is 24 v. See Appendix B Wiring
Diagrams (on pages 38-49) for typical field control connections
and the unit's label diagram for field-supplied wiring details.
Route control wires to the 38AU unit through the opening in unit's
end panel to the connections terminal board in the unit's control
box.
Remainder of the system controls connection will vary accord-
ing to the specific construction details of the indoor section (air
handler or packaged fan coil). Figures 17 (38AUZ) and 18
(38AUD) depict typical connections to a Carrier 40RU fan coil
unit. Plan for field connections carefully and install control wir-
ing correctly per the project plan. Additional components and
supplemental transformer accessory may be required.
The 38AU unit requires an external temperature control device.
This device can be a thermostat (field-supplied) or a PremierLink
controller (available as a field-installed accessory, for use on a
Carrier Comfort Network or as a stand alone control).
®
16
GFCI RECEPTACLE
NOT INCLUDED
GASKET
BASEPLATE FOR
GFCI RECEPTACLE