York YLAA0195HE, Manual

Page: 37 / 206

37
JOHNSON CONTROLS
FORM 150.72-NM3 (1020)
ISSUE DATE 10/05/2020
4
To ensure warranty coverage, this
equipment must be commissioned and
serviced by an authorized Johnson
Controls service mechanic or a quali -
fied service person experienced in
chiller installation. Installation must
comply with all applicable codes, par -
ticularly in regard to electrical wiring
and other safety elements such as re -
lief valves, HP cutout settings, design
working pressures, and ventilation re -
quirements 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
before 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 system.
Do not remove protective covers from water con-
nections 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
inspected 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 inspection by the carrier’s agent should be made at
once. See “Instruction” manual, Form 50.15-NM for
more information and details.
LOCATION AND CLEARANCES
The YLAA chillers are designed for outdoor installation.
When selecting a site for installation, be guided by the
following conditions:
1. For outdoor locations of the unit, select a place
having an adequate supply of fresh air for the con-
denser.
2. Avoid locations beneath windows or between
structures where normal operating sounds may be
objectionable.
3. Installation sites may be either on a roof, or at
ground level.
(See “Foundation” within this section
of the IOM .)
4. The condenser fans are the propeller-type, and are
not recommended for use with duct work in the
condenser air stream.
5. When it is desirable to surround the unit(s), it is
recommended that the screening be able to pass
the required chiller l/s (CFM) without exceeding
0.1" of water external static pressure.
6. Protection against corrosive environments is avail-
able by supplying the units with either copper fin,
cured phenolic, or epoxy coating on the condenser
coils. The phenolic or epoxy coils should be offered
with any units being installed at the seashore or
where salt spray may hit the unit.
In installations where winter operation is intended and
snow accumulations are expected, additional height must
be provided to ensure normal condenser air flow.
Recommended clearances for units are listed under
“Notes” in the “Dimensions” section of this IOM.
When the available space is less, the unit(s) must be
equipped with the discharge pressure transducer option
to permit high pressure unloading in the event that air
recirculation were to occur.