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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).
UNIT
CONNECT
VOLTAGE
AS
L1: RED + YEL
208, 230
240
L2: BLU + GRA
L1: RED
460
480
Splice BLU + YEL
L2: GRA
L1: RED
575
600
L2: GRA
Fig. 11 — Powered Convenience Outlet Wiring
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
™
"
1
T-15, non-renewable screw-in (Edison base)
type plug fuse.
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 Elec-
trical Code Article 210, Branch Circuits, for use of convenience
outlets.
Installing Weatherproof Cover
A weatherproof while-in-use cover for the factory installed conve-
nience outlets is now required by UL standards. This cover cannot
be factory mounted due its depth; it must be installed at unit instal-
lation. 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
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 approxi-
mately 1/2 in. (13 mm) under screw heads are exposed. Press the
1. Third-party trademarks and logos are the property of their respective
owners.
PRIMARY
TRANSFORMER
CONNECTIONS
TERMINALS
H1 + H3
H2 + H4
H1
H2 + H3
H4
H1
H2
POWER
TO
UNIT
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 per-
mit service tool cords to exit the cover. Check for full closing and
latching.
Cover — While-In-Use
Weatherproof
Fig. 12 — Weatherproof Cover Installation
NOTE: Check all factory and field electrical connections for
tightness.
FIELD CONTROL WIRING
38AUQ unit control voltage is 24 v. See Fig. A-G in Appendix B
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 con-
nections 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. Figure 13
depicts typical connections to a Carrier 40RFQ fan coil unit. Plan
for field connections carefully and install control wiring correctly
™1
per the project plan. Additional components and supplemental
transformer accessory may be required.
The 38AUQ unit requires an external temperature control device.
This device can be a field-supplied thermostat (field-supplied) or a
thermostatic emulation device provided as part of a third-party
Building Management System.
THERMOSTAT
Install a Carrier-approved accessory thermostat according to in-
stallation instructions included with the accessory. For complete
economizer function, select a two-stage cooling thermostat.
38AUQ(D/E/M/N) units require a two-stage thermostat.
38AUQ unit control system requires a conventional electric ther-
mostat that will energize the G terminal on a call for Cool and
Heat mode. Do not configure the thermostat a heat pump type;
Heat mode will not work with a thermostat configured for heat
pump.
Locate the thermostat accessory on a solid wall in the conditioned
space to sense average temperature in accordance with the ther-
AND
mostat installation instructions.
If the thermostat contains a logic circuit requiring 24-v power, use
a thermostat cable or equivalent single leads of different colors
with minimum of five leads between the 38AUQ unit's outdoor
unit connection board and the indoor unit connection board. If the
thermostat does not require a 24-v source (no "C" connection re-
quired), use a thermostat cable or equivalent with minimum of
four leads. One additional lead is required between the indoor unit
connection board and the thermostat for terminal G. If the
13
GFCI Receptacle
Not Included
Gasket
Baseplate For
GFCI Receptacle
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