Johnson Controls ZL Series Installation Manual page 19

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 17.
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 in. NPT female
connection on the unit to an open drain.
Figure 17: Condensate drain
Compressors
The compressor used in this product is specifically
designed to operate with R-410A Refrigerant and
cannot be interchanged.
CAUTION
This system uses R-410A Refrigerant which operates
at higher pressures than R-22. No other refrigerant
may be used in this system.
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.
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.
R-410A compressor lubricants are known to cause
long term damage to some synthetic roofing
materials.
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.
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.
Do not loosen compressor mounting bolts.
Filters
Each unit comes with 2 in. filters. 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 correctly 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
Installation Manual ZL Series 7.5- 12.5 Ton 60 Hertz R-410A
Johnson Controls Ducted Systems
CAUTION
CAUTION
CAUTION
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