39
JOHNSON CONTROLS
FORM 150.67-NM1
ISSUE DATE: 4/28/2017
4
To ensure warranty coverage, this
equipment must be commissioned
and serviced by an authorized John-
son Controls service mechanic or a
qualied service person experienced
in chiller installation. Installation
must comply with all applicable codes,
particularly in regard to electrical
wiring and other safety elements such
as relief valves, HP cutout settings,
design working pressures, and ven-
tilation requirements consistent with
the amount and type of refrigerant
charge.
Lethal voltages exist within the control
panels. Before servicing, open and tag
all disconnect switches.
INSTALLATION CHECKLIST
The following items, 1 through 5, must be checked be-
fore placing the units in operation.
1. Inspect the unit for shipping damage.
2. Rig unit using spreader bars.
3. Open the unit only to install water piping sys-
tem. Do not remove protective covers from water
connections until piping is ready for attachment.
Check water piping to ensure cleanliness.
4. Pipe unit using good piping practice (see ASHRAE
handbook section 215 and 195).
5. Check to see that the unit is installed and operated
within limitations (Refer to LIMITATIONS).
The following pages outline detailed procedures to be
followed to install and start-up the chiller.
HANDLING
These units are shipped as completely assembled units
containing full operating charge, and care should be
taken to avoid damage due to rough handling.
SECTION 4 – INSTALLATION
INSPECTION
Immediately upon receiving the unit, it should be in-
spected for possible damage which may have occurred
during transit. If damage is evident, it should be noted
in the carrier’s freight bill. A written request for inspec-
tion by the carrier’s agent should be made at once. See
“Instruction” manual, Form 50.15-NM for more infor-
mation and details.
LOCATION AND CLEARANCES
These units are designed for outdoor installations on
ground level, rooftop, or beside a building. Location
should be selected for minimum sun exposure and to
insure adequate supply of fresh air for the condenser.
The units must be installed with sufficient clearances
for air entrance to the condenser coil, for air discharge
away from the condenser, and for servicing access.
In installations where winter operation is intended and
snow accumulations are expected, additional height
must be provided to ensure normal condenser air flow.
Clearances are listed on Figure 30.
Foundation
The unit should be mounted on a flat and level foun-
dation, floor, or rooftop capable of supporting the en-
tire operating weight of the equipment. See “Physical
Data” for operating weight. If the unit is elevated be-
yond the normal reach of service personnel, a suitable
catwalk must be capable of supporting service person-
nel, their equipment, and the compressors.
Ground Level Locations
It is important that the units be installed on a sub-
stantial base that will not settle. A one piece concrete
slab with footers extended below the frost line is
highly recommended. Additionally, the slab should
not be tied to the main building foundations as noise
and vibration may be transmitted. Mounting holes are
provided in the steel channel for bolting the unit to its
foundation (see Section 5 “Dimensions”).
For ground level installations, precautions should be
taken to protect the unit from tampering by or injury to
unauthorized persons. Screws and/or latches on access
panels will prevent casual tampering. However, further
safety precautions such as a fenced-in enclosure or
locking devices on the panels may be advisable.
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