Instruction manual
CAUTION: Failure to follow these precautions could
result in damage to the unit being installed:
1. Make all electrical connections in accordance with
NEC ANSI/NFPA (latest edition) and local electrical
codes governing such wiring. In Canada, all electrical
connections must be in accordance with CSA standard
C22.1 Canadian Electrical Code Part 1 and applicable
local codes. Refer to unit wiring diagram.
2. Use only copper conductor for connections between
field-supplied electrical disconnect switch and unit.
DO NOT USE ALUMINUM WIRE.
3. Be sure that high-voltage power to unit is within
operating voltage range indicated on unit rating plate.
On 3-phase units, ensure phases are balanced within 2
percent. Consult local power company for correction
of improper voltage and/or phase imbalance.
4. Insulate low-voltage wires for highest voltage con-
tained within conduit when low-voltage control wires
are in same conduit as high-voltage wires.
5. Do not damage internal components when drilling
through any panel to mount electrical hardware, con-
duit, etc.
A. HIGH-VOLTAGE CONNECTIONS
The unit must have a separate electrical service with a field-
supplied, waterproof disconnect switch mounted at, or within sight
from the unit. Refer to the unit rating plate, NEC and local codes
for maximum fuse/circuit breaker size and minimum circuit amps
(ampacity) for wire sizing (See Table 3 for electrical data).
The field-supplied disconnect may be mounted on the unit over the
high-voltage inlet hole (See Figs. 2 and 3).
If the unit has an electric heater, a second disconnect may be
required. Consult the Installation, Start-Up, and Service Instruc-
tions provided with the accessory for electrical service connec-
tions.
Operation of unit on improper line voltage constitutes abuse and
may cause unit damage that could affect warranty.
B. ROUTING POWER LEADS INTO UNIT
Use only copper wire between disconnect and unit. The high-
voltage leads should be in a conduit until they enter the duct panel;
conduit termination at the duct panel must be watertight. Run the
high-voltage leads through the power entry knockout on the power
entry side panel. (See Fig. 2 and 3 for location and size) When the
leads are inside the unit, run leads up the high-voltage raceway to
the line wiring splice box. (See Fig. 13 through 15) For single-
TABLE 1—PHYSICAL DATA—UNIT 602B
UNIT SIZE 602B024 602B030 602B036 602B042 602B048 602B060
NOMINAL CAPACITY (ton) 2 2-1/2 3 3-1/2 4 5
OPERATING WEIGHT (lb.) 299 320 328 350 355 428
COMPRESSOR QUANTITY 1
TYPE SCROLL COMPRESSOR
REFRIGERANT R-410A
REFRIGERANT METERING DEVICE Accurater
Refrigerant (R-410A) Quantity (lb.) 7.0 8.9 9.3 9.5 10.6 12.4
ORIFICE ID (in.) 0.061 0.061 0.067 0.073 0.076 0.088
ORIFICE OD (in.) 0.032 (2) 0.040 (2) 0.040 (2) 0.038 (2) 0.046 (2) 0.052 (2)
OUTDOOR COIL
Rows... Fins/in.
face area (sq. ft.)
2...17
8.5
2...17
10.3
2...17
10.3
2...17
13.5
2...17
13.5
2...17
15.4
OUTDOOR FAN
Nominal Airflow (CFM)
Diameter
Motor HP (RPM)
2350
22
1/8 (825)
2350
22
1/8 (825)
2800
22
1/4 (1100)
2500
22
1/8 (825)
3300
22
1/4 (1100)
3300
22
1/4 (1100)
INDOOR COIL
Rows... Fins/in.
face area (sq. ft.)
3...15
3.7
3...15
3.7
4...15
3.7
3...15
4.7
4...15
4.7
4...15
5.7
INDOOR BLOWER
Nominal Airflow (CFM)
Size (in.)
Motor (HP)
800
10x10
1/4
1000
10x10
1/4
1200
10x10
1/2
1400
11x10
1/2
1600
11x10
1/2
1750
11x10
1
HIGH-PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
610±15
420±25
LOSS-OF-CHARGE/LOW-PRESSURE SWITCH
(Liquid Line) (psig)
Cutout
Reset (Auto)
20±5
45±10
RETURN-AIR FILTERS (in.)*
throwaway
20x20x1 20x20x1 20x24x1 24x30x1 24x30x1 24x30x1
* Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300
ft/minute for throwaway type or 450 ft/minute for high-capacity type. Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg.
TABLE 2—MINIMUM AIRFLOW FOR RELIABLE ELECTRIC HEATER OPERATION (CFM)
SIZE 602B024 602B030 602B036 602B042 602B048 602B060
AIRFLOW (CFM) 800 1000* 1200 1400 1600 2000
* The 030 size models must be run on medium or high speed when used in conjunction with 15 kw electric heat accessory
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