Carrier COBRA 48/50HJ004-014 User Manual
Page 12
12
If the 208/230-v unit is to be connected to a 208-v power sup-
ply, the transformer must be rewired by moving the black wire
with the
1
/
4
-in. female space connector from the 230-volt con-
nection and moving to the 200-volt
1
/
4
-in. male terminal on the
primary side of the transformer.
Refer to unit label diagram for additional information. Pig-
tails are provided for field wire connections. Use factory-
supplied splices or UL (Underwriters’ Laboratories) approved
copper/aluminum connector.
When installing units, provide a disconnect per the NEC.
All field wiring must comply with NEC and local
requirements.
Install field wiring as follows:
1. Install conduit through side panel openings. Install con-
duit between disconnect and control box.
2. Install power lines to terminal connections as shown in
Fig. 7.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate (see
Tables 1A-1H). On 3-phase units, voltages between phases must
be balanced within 2% and the current within 10%. Use the for-
mula shown in the legend for Tables 1A-1H, Note 2 to deter-
mine 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.
FACTORY-SUPPLIED NON-FUSED DISCONNECT — The
factory-supplied disconnect is capable of handling disconnect
amps up to 80 A for a COBRA Energy Recovery unit. For dis-
connect amps greater than 80 A, a field-supplied disconnect is
required.
FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermidistat assembly according to installation
instructions included with the accessory. Locate thermidistat as-
sembly on a solid wall in the conditioned space to sense average
temperature in accordance with thermidistat installation instruc-
tions on page 30. Connect thermidistat wires to terminal board.
Route thermidistat cable or equivalent single leads of col-
ored wire from subbase terminals through connector on unit to
low-voltage connections (shown in Fig. 8). Thermidistat con-
trol wiring is routed to both the rooftop unit control box and the
energy recovery section control box.
If a PremierLink™ control is used, a thermidistat does not
need to be used. A humidistat and a separate room air sensor
are used. Two extra terminal blocks (TB2 and TB3) are provid-
ed in the control box for all units with PremierLink controls.
No wiring should be directly connected to the PremierLink
control. Wire sensors to TB2 or TB3. Humidistat is wired to
TB1 and energy recovery section control box.
Fig. 6B — Rigging Label — COBRA™ Energy Recovery Unit — Sizes 48/50HJ008-014
MAX WEIGHT
A
B
C
lb
kg
in.
mm
in.
mm
in.
mm
48HJ008 w/62AQ200
1310
595
77.42
1966.5
66.50
1689.10
42.12
1070
48HJ008 w/62AQ300
1355
616
77.42
1966.5
66.50
1689.10
42.12
1070
48HJ009 w/62AQ200
1315
597
77.42
1966.5
66.50
1689.10
42.12
1070
48HJ009 w/62AQ300
1360
618
77.42
1966.5
66.50
1689.10
42.12
1070
48HJ012 w/62AQ200
1400
636
77.42
1966.5
66.50
1689.10
50.12
1273
48HJ012 w/62AQ300
1445
657
77.42
1966.5
66.50
1689.10
50.12
1273
48HJ014 w/62AQ200
1440
655
77.42
1966.5
66.50
1689.10
50.12
1273
48HJ014 w/62AQ300
1485
675
77.42
1966.5
66.50
1689.10
50.12
1273
50HJ008 w/62AQ200
1240
564
77.42
1966.5
66.50
1689.10
42.12
1070
50HJ008 w/62AQ300
1285
584
77.42
1966.5
66.50
1689.10
42.12
1070
50HJ009 w/62AQ200
1245
566
77.42
1966.5
66.50
1689.10
42.12
1070
50HJ009 w/62AQ300
1290
586
77.42
1966.5
66.50
1689.10
42.12
1070
50HJ012 w/62AQ200
1325
602
77.42
1966.5
66.50
1689.10
42.12
1070
50HJ012 w/62AQ300
1370
623
77.42
1966.5
66.50
1689.10
42.12
1070
50HJ014 w/62AQ200
1345
620
77.42
1966.5
66.50
1689.10
42.12
1070
50HJ014 w/62AQ300
1410
641
77.42
1966.5
66.50
1689.10
42.12
1070