Johnson Controls ZZ Series, Installation Manual

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5834853-YIM-B-0320
16 Johnson Controls Ducted Systems
Condensate Drain
A side condensate drain is provided to facilitate condensate
piping. A condensate drain connection is available through the
base pan for piping inside the roof curb. Trap the connection per
Figure 18. The trap and drain lines should be protected from
freezing.
Plumbing must conform to local codes. Use a sealing compound
on male pipe threads. Install condensate drain line from the 3/4
inch NPT female connection on the unit to an open drain.
Figure 18: Condensate Drain
Compressors
The compressor used in this product is specifically designed to
operate with R-410A Refrigerant and cannot be interchanged.
The compressor also uses a refrigerant oil that is extremely
hygroscopic, meaning it absorbs water readily. They can absorb
15 times as much water as other oils designed for HCFC and
CFC refrigerants. Take all necessary precautions to avoid
exposure of the oil to the atmosphere.
R-410A compressor lubricants are known to cause long term
damage to some synthetic roofing materials.
Procedures which risk oil leakage include, but are not limited to,
compressor replacement, repairing refrigerant leaks, replacing
refrigerant components such as filter drier, pressure switch,
metering device or coil.
Units are shipped with compressor mountings which are
factory-adjusted and ready for operation.
Filters
Two-inch filters are supplied with each unit. Four-inch filters
may be used with no modification to the filter racks. Filters must
always be installed ahead of evaporator coil and must be kept
clean or replaced with same size and type. Dirty filters reduce
the capacity of the unit and result in frosted coils or safety
shutdown. Refer to physical data tables, for the number and
size of filters needed for the unit. The unit should not be
operated without filters properly installed.
Power And Control Wiring
Field wiring to the unit, fuses, and disconnects must conform to
provisions of National Electrical Code (NEC), ANSI/NFPA No.
70 – Latest Edition (in U.S.A.), current Canadian Electrical
Code C221, and/or local ordinances. The unit must be
electrically grounded in accordance with NEC and CEC as
specified above and/or local codes.
Voltage tolerances which must be maintained at the
compressor terminals during starting and running conditions are
indicated on the unit Rating Plate and Table 9.
The internal wiring harnesses furnished with this unit are an
integral part of the design certified unit. Field alteration to
comply with electrical codes should not be required. If any of
the wire supplied with the unit must be replaced, replacement
wire must be of the type shown on the wiring diagram and the
same minimum gauge as the replaced wire.
This system uses R-410A Refrigerant which operates at
higher pressures than R-22. No other refrigerant may be
used in this system.
Do not leave the system open to the atmosphere. Unit
damage could occur due to moisture being absorbed by
the
refrigerant in the system. This type of oil is highly
susceptible to moisture absorption.
3”
Minimum
Exposure, even if immediately cleaned up, may cause
embrittlement (leading to cracking) to occur in one year
or more. When performing any service that may risk
exposure of compressor oil to the roof, take precautions
to protect roofing.
Do not loosen compressor mounting bolts.
208/230-3-60 and 208/230-1-60 units control
transformers are factory wired for 230v. Change tap on
transformer for 208v operation. See unit wiring diagram.