5
Table 1—Physical Data
UNIT SIZE 024 030 036 042 048 060
NOMINAL CAPACITY (ton) 2 2--1/2 3 3--1/2 4 5
OPERATING WEIGHT (lb.) 268 299 352 364 359 408
COMPRESSOR Scroll UltraTechScroll
REFRIGERANT (R--22)
Quantity (lb.)
6.8 9.5 9.5 11.1 10.7 12.5
REFRIGERANT METERING DEVICE AccuRater
®
TXV
Orifice I D (in.) 0.067 0.067 0.082 0.086 – –
Orifice OD (in.) 0.049 0.057 0.059 0.063 0.070 0.073
CONDENSER COIL Copper Tubes, Aluminum Plate Fins
Rows…Fins/in. 2…21 2…21 2…21 2…21 2…21 2…21
Face Area (sq. ft.) 11.1 12.7 15.8 15.8 13.3 15.8
CONDENSER FAN Propeller
Nominal Cfm 2600 2600 3200 3200 3200 3300
Diameter 20 20 20 20 20 20
Motor HP (RPM) 1/8 (825) 1/8 (825) 1/4 (1100) 1/4 (1100) 1/4 (1100) 1/2 (1100)
EVAPORATOR COIL Copper Tubes, Aluminum Plate Fins
Rows…Fins/in. 3…17 3…17 4…17 4…17 4…17 4…17
Face Area (sq. ft.) 4.3 4.9 4.9 6.1 4.9 6.1
Evaporator blower Direct Drive
Nominal Airflow (Cfm) 800 1000 1200 1400 1600 1875
Size (in.) 10x8 10x8 11x9 11x9 11x10 11x10
Motor HP (RPM) 1/2 (1050) 1/2 (1050) 3/4 (1050) 3/4 (1050) 1 (1050) 1 (1050)
CONNECTING DUCT SIZES Round
Supply Air (in.) 14
Return Air (in.) 14
Return--Air Filters (in.)* Throwaway 24 x 24 24 x 24 24 x 24 24 x 30 30 x 30 30 x 30
*Required filter sizes shown are based on the ARI (Air conditioning & Refrigeration Institute) rated airflow at a velocity of 300 ft/min for throwaway type or 450
ft/min for high capacity type. Recommended filters are 1 ---in. thick.
Table 2—Minimum Airflow for Safe
Electric Heater Operation
Unit Size
Minimum Airflow (CFM)
5kW 7.5kW 10kW 15kW 20kW
024 400 550 650
030 450 600 800 850
036 450 600 800 850 900
042 450 600 800 850 900
048 450 600 800 850 900
060 450 600 800 850 900
Step 7—Install Electrical Connections
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
The unit cabinet must have an uninterrupted, unbroken
electricalground tominimize the possibility of personal injury
if an electrical fault should occur. This ground may consist of
an electrical wire connected to the unit ground screw in the
control compartment, or conduit approved for electrical
ground when installed in accordance with NEC, ANSI/NFPA
American National Standards Institute/National Fire
Protection Association (latest edition) (in Canada, Canadian
Electrical Code CSA C22.1) and local electrical codes.
!
WARNING
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in damage to the unit
being installed.
1. Make all electrical connections in accordance with NEC
ANSI/NFP A (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 surethat high-- voltage power to unit is within operating
voltage range indicated on unit rating plate. On 3 --phase
units,ensure phasesare balanced within 2 percent. Consult
local power company for correction of improper voltage
and/or phase imbalance.
4. Do not damageinternal componentswhen drilling through
any panel to mount electrical hardware, conduit, etc.
!
CAUTION
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 5 for electrical data).
The field-- supplied disconnect may be mounted on the unit over the
high-- voltage inlet hole when the standard power and low-- voltage
entry points are used. See Fig. 6 and 7 for acceptable location.
50ZPA
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