JOHNSON CONTROLS
32
FORM 150.67-NM2
ISSUE DATE: 01/31/2019
SECTION 4 – INSTALLATION
Noise Sensitive Locations
Efforts should be made to assure that the chiller is not
located next to occupied spaces or noise sensitive areas
where chiller noise level would be a problem. Chiller
noise is a result of compressor and fan operation. Con-
siderations should be made utilizing noise levels pub-
lished in the YORK Engineering Guide for the specific
chiller model. Sound blankets for the compressors and
low sound fans are available.
SPRING ISOLATORS (OPTIONAL)
When ordered, four (4) isolators will be furnished.
Identify the isolator, locate at the proper mounting
point, and adjust per instructions.
COMPRESSOR MOUNTING
The compressors are mounted on four (4) rubber iso-
lators. The mounting bolts should not be loosened or
adjusted at installation of the chiller.
REMOTE COOLER OPTION
Not available at this time.
CHILLED LIQUID PIPING
General – When the unit(s) has been located in its fi-
nal position, the unit water piping may be connected.
Normal installation precautions should be observed in
order to receive maximum operating efficiencies. Pip-
ing should be kept free of all foreign matter. All chilled
water evaporator piping must comply in all respects
with local plumbing codes and ordinances.
Since elbows, tees and valves decrease pump capacity,
all piping should be kept as straight and as simple as
possible. All piping must be supported independent
of the chiller.
Consideration should be given to com-
pressor access when laying out water pip-
ing. Routing the water piping too close to
the unit could make compressor servicing/
replacement difcult.
Hand stop valves should be installed in all lines to fa-
cilitate servicing.
Piping to the inlet and outlet connections of the chiller
should include high-pressure rubber hose or piping
loops to ensure against transmission of water pump vi-
bration. The necessary components must be obtained
in the field.
Drain connections should be provided at all low points
to permit complete drainage of the cooler and system
water piping.
A small valve or valves should be installed at the high-
est point or points in the chilled water piping to allow
any trapped air to be purged. Vent and drain connec-
tions should be extended beyond the insulation to make
them accessible.
The piping to and from the cooler must be designed to
suit the individual installation. It is important that the
following considerations be observed:
1. The chilled liquid piping system should be laid
out so that the circulating pump discharges di-
rectly into the cooler. The suction for this pump
should be taken from the piping system return line
and not the cooler. This piping scheme is recom-
mended, but is not mandatory.
2. The inlet and outlet cooler connection sizes are 3”
(YCAL0043 – 0066).
3. A strainer, preferably 40 mesh, must be installed
in the cooler inlet line just ahead of the cooler.
This is important to protect the cooler from en-
trance of large particles which could cause dam-
age to the evaporator.
4. All chilled liquid piping should be thoroughly
ushed to free it from foreign material before
the system is placed into operation. Use care not
to ush any foreign material into or through the
cooler.
5. As an aid to servicing, thermometers and pressure
gauges should be installed in the inlet and outlet
water lines.
6. The chilled water lines that are exposed to outdoor
ambients should be wrapped with supplemen-
tal heater cable and insulated to protect against
freeze-up during low ambient periods, and to pre-
vent formation of condensation on lines in warm
humid locations.
7. A chilled water ow switch, (either by YORK or
others) MUST be installed in the leaving water
piping of the cooler. There should be a straight
horizontal run of at least 5 diameters on each side
of the switch. Adjust the ow switch paddle to
the size of the pipe in which it is to be installed
(see manufacturer’s instructions furnished with
the switch). The switch is to be wired to terminals
13 – 14 of CTB1 located in the control panel, as
shown on the unit wiring diagram.
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