Determine Location; Foundation Requirements; Clearance Requirements; Rig Unit To Final Location - York YMC 2 Manual

Section 2 - Installation
The rigging, operating weights, and over-
all dimensions are provided in Section
3 - Dimensions, nozzle arrangements,
and weights to help you determine the
clearances required for rigging. Add 6
in. (15 cm) to overall height for optional
skidded unit.

Determine location

YMC chillers are furnished with vibration isolator
2
mounts for basement or ground level installations.
Units may be located on upper floor levels providing
the floor is capable of supporting the total unit operat-
ing weight and optional spring isolators are used.
Sufficient clearance to facilitate normal
service and maintenance work must be
provided around and above the unit and
particularly space provided at either
end to permit cleaning or replacement
of evaporator and condenser tubes. See
Clearance requirements. A doorway or
other sufficiently large opening properly
located may be used.
The chiller should be located in an indoor
location where temperatures range from
40°F to 110°F (4.4°C to 43.3°C).
The chiller control panel location must be
a physically secured area that only grants
authorized personnel access. To further
harden security, the control panel must
be mechanically locked. The key(s) to the
control panel must be removed and stored
in a secure location.

Foundation requirements

A level floor, mounting pad or foundation must be pro-
vided by others, capable of supporting the operating
weight of the unit.

Clearance requirements

Use the following clearances:
Rear and above unit
Front of unit
Tube removal
* 10 ft (3 m): 2110 and 2510 shell codes
14 ft (4.3 m): 2514 shell codes
14
2 ft (61 cm)
3 ft (91 cm)
14 ft* (4.3 m) either end

Rig unit to final location

Rig the unit to its final location on the floor or mount-
ing pad, lift the unit (or shell assembly) by means of an
overhead lift and lower the unit to its mounting posi-
tion. If optional shipping skids are used, remove them
before lowering the chiller to its mounting position.
At this point units shipped dismantled
should be assembled under the supervi-
sion of a Johnson Controls representative.
If evaporator is to be field insulated, the insulation
should be applied to the evaporator before the unit is
placed in position while the unit is in the lift position.
Be sure unit is properly supported. See Apply insula-
tion and Figure 9 for further information.

Install isolators

Neoprene isolator pads

Locate and place isolator pads
The isolator pad mounts are to be located and placed
rubber-side down as shown in Figure 3 and Figure 4.
After the isolator pads have been placed into position
on the floor, lower the chiller onto the pads. When the
unit is in place, remove the rigging equipment and
check that the unit is level.
Level the unit
The longitudinal alignment of the unit should be
checked by placing a level on the top center of the
evaporator shell under the compressor/motor assem-
bly. Transverse alignment should be checked by plac-
ing a level on top of the shell end sheets.
The unit should be level within 1/4 in. (6 mm) from
one end to the other end and from front to the rear. If
the chiller is not level within the amount specified, lift
it and place shims between the isolation pad and the
chiller tube sheets. Shims are provided by the installer.
Lower unit again and recheck to see that it is level
Checking the isolation pad deflection
Check all isolation pads for the proper deflection while
checking to see if the unit is level. Each pad should be
deflected approximately 0.10 in. (2.5 mm) to 0.20 in.
(5 mm). If an isolation pad is under-deflected, place
shims between the unit tube sheet and the top of the
pad to equally deflect all pads.
Form 160.78-N1
Issue date: 2/02/2022
JOHNSON CONTROLS