Specifications

Page 8 of 32 / IM 1060
Two 90° Turns Prior to the Intake
(DuctworkSizedBasedonAirow)
Flexible Connector
Acoustic/Thermal
Lining10ft.(3meters)
Ductwork Supported
Independent of Unit
Acoustic/Thermal
Lining
Figure 8: Suggested Return Ducting per ASHRAE and SMACNA Publications
Acoustic/Thermal
Lining
Return Air Intake
Located
Away from the
Unit Blower
Flexible Connector
Ventilation Air
Ventilation may require outside air. The temperature of
the ventilation air must be controlled so that mixture
of outside air and return air entering the conditioner
does not exceed conditioner application limits. It is also
typical to close off the ventilation air system during
unoccupied periods (night setback).
The ventilation air system is generally a separate build-
ing subsystem with distribution ductwork. Simple
introduction of the outside air into each return air
plenum chamber reasonably close to the conditioner air
inlet is not only adequate, but recommended. Do not
duct outside air directly to the conditioner inlet. Provide
sufcientdistanceforthoroughmixingofoutsideand
return air. See Operating Limits on page 11.
Electrical Data
General
1. Verify the compatibility between the voltage and
phase of the available power and that shown on the
unit serial plate. Line and low voltage wiring must
comply with local codes or the National Electrical
Code, whichever applies.
2. Applycorrectlinevoltagetotheunit.A7⁄8"(22mm)
holeand/ora1-1⁄8"(29mm)knockoutissupplied
on the side of the unit. A disconnect switch near the
unit is required by code. Power to the unit must be
sized correctly and have dual element (Class RK5)
fuses or an HACR circuit breaker for branch circuit
overcurrent protection. See the nameplate for correct
ratings.
3. Three phase 50 cycle units, 380/50-3, require a
neutral wire for 230/50-1 power to the fan circuit.
4. Connect the thermostat/subbase wiring with the
power “off ” to the unit.
5. Field supplied relays installed on the input
terminals W1, W2, Y1, Y2 or G may introduce
electrical noise. Never install relay coils in series
with the inputs.
230-Volt Operation
All 208/230-volt three-phase units are factory wired
for 208-volt operation. For 230-volt operation, the line
voltage tap on the 24-volt transformer must be changed.
Disconnect and cap the red lead wire and interchange it
with the orange lead wire on the primary of the 24-volt
transformer.
14.7
6.6
6.6
15.3
6.9
5.4
6.8
17.4
8.6
6.5
8.6
14.7
6.6
6.6
15.3
6.9
5.4
6.8
17.4
8.6
6.5
8.6
88.0
44.0
46.0
83.1
41.0
33.0
43.0
110.0
52.0
38.9
51.5
Unit Size Voltage/Hz/Phase
Fan
Compressor 1 Compressor 2
Fan Motor Total Unit
Minimum
Minimum
Maximum
Motor (HP)
RLA LRA RLA LRA
FLA FLA Voltage Circuit Amps Fuse Size
208/230-60-3
460-60-3
380-50-3
208/230-60-3
460-60-3
575-60-3
380-50-3
208/230-60-3
460-60-3
575-60-3
380-50-3
072
096
120
1.5
1.5
1.5
1.5
1.5
1.5
1.5
3
3
3
3
Table 4: Electrical Data
88.0
44.0
46.0
83.1
41.0
33.0
43.0
110.0
52.0
38.9
51.5
5.6
2.8
3.4
5.6
2.8
2.0
3.4
9.5
4.5
3.4
4.8
35.0
16.0
16.6
36.2
16.6
12.8
17.0
44.3
21.7
16.4
22.0
187.0
416.0
342.0
187.0
416.0
520.0
342.0
187.0
416.0
520.0
342.0
38.7
17.7
18.3
40.0
18.3
14.2
18.7
48.7
23.9
18.0
24.2
50
20
20
50
25
15
25
60
30
20
30