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. 11.
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.
Fuse on power type: The factory fuse is a Bussman
"Fusetron" T-15, non-renewable screw-in (Edison base)
type plug fuse.
Using unit-mounted convenience outlets: Units with
unit-mounded 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.
SCHEMATIC - CONVENIENCE OUTLET
•.....
; RED YEL BLU 6RA
_ NOTESLOCAL CODE
TRA_4 RED--m __2FOR 240V SUPPLY
Y_--CONNECI BL TO GRA
REI) YEL BkU GRA
TRA_4
! i i
' RED GRAI X4
' 8kg--_ L--*-- Writ
' SECONDARY
I (H_,._21D) U 2OV GROUND FAULT
• )(4 X1 GFI-CO
I / , 0RNYEL
+
:................ ' T--
C10206
UNIT CONNECT PRIMARY TRANSFORMER
VOLTAGE AS CONNECTIONS TERMINALS
208, 240 LI: RED + YEL H1 + H3
230 L2: BLU + GRA H2 + H4
L1 : RED H1
460 480 Splice BLU + YEL H2 + H3
L2: GRA H4
L1 : RED H1
575 600
L2: GRA H2
Fig. 11 - Powered Convenience Outlet Wiring
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 1/2in (13 mm) under screw heads are
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 overtighten).
Mount the weatherproof cover to the backing plate as
shown in Fig. 12. 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 - WHILEqN=USE RECEPTACLE
WEATHERPROOF NOT INCLUDED
BASE PLATE FOR
GFCIRECEPTACLE
Fig. 12 - Weatherproof Cover Installation
C09022
NOTE: Check all factory and field electrical connections
for tightness.
Field Control Wiring --
38AUQ unit control voltage is 24 v. See Fig. 19 for typical
field control connections and the unit's label diagram for
field-supplied wiring details. Route control wires to the
38AUQ 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
according to the specific construction details of the indoor
section. Fig. 13 depicts typical connections to a Carrier
40RUQ fan coil unit. Plan for field connections carefully
and install control wiring correctly per the project plan.
Additional components and supplemental transformer
accessory may be required.
14
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