Heatcraft Refrigeration Products H-IM-FL1A - Manual (Page 4)

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Figure 2. Solid Mount for Mobile or Deep
Sump Application.
Condensing Unit Rigging and Mounting
Rigging holes are provided on all units. Caution should be
exercised when moving these units. To prevent damage to the
unit housing during rigging, cables or chains used must be held
apart by spacer bars. The mounting platform or base should be
level and located so as to permit free access of supply air.
Ground Mounting
Concrete slab raised six inches above ground level provides a
suitable base. Raising the base above ground level provides
some protection from ground water and wind blown matter.
Before tightening mounting bolts, recheck level of unit. The unit
should in all cases be located with a clear space in all directions
that is at a minimum, equal to the height of the unit above
the mounting surface. A condensing unit mounted in a corner
formed by two walls, may result in discharge air recirculation
with resulting loss of capacity.
Roof Mounting
Due to the weight of the units, a structural analysis by a
qualified engineer may be required before mounting. Roof
mounted units should be installed level on steel channels or
an I-beam frame capable of supporting the weight of the unit.
Vibration absorbing pads or springs should be installed between
the condensing unit legs or frame and the roof mounting
assembly.
Access
Provide adequate space at the compressor end of the unit for
servicing. Provide adequate space on the connection side to
permit service of components.
Spring Mounted Compressor
Compressors are secured rigidly to make sure there is no transit
damage. Before operating the unit, it is necessary to follow
these steps:
a. Remove the upper nuts and washers.
b. Discard the shipping spacers.
c. Install the neoprene spacers. (Spacers located
in the electrical panel or tied to compressor.)
d. Replace the upper mounting nuts and washers.
e. Allow 1/16 inch space between the mounting nut/
washer and the neoprene spacer.
Rigid Mounted Compressor
Some products use rigid mounted compressors. Check the
compressor mounting bolts to insure they have not vibrated
loose during shipment.
Ambient Fan Cycle Control
This is an automatic winter control method which will maintain
a condensing pressure within reasonable limits by cycling
fan motors in response to outside air temperature. The
thermostat(s) should be field adjusted to shut off the fan when
the condensing temperature is reduced to approximately 90 ˚ F.
Table 2 on page 5 lists approximate settings for several system
T.D.ʼs. These settings are approximate as they do not take into
account variations in load.
CAUTION: Under no circumstance should all
condenser motors be allowed to cycle
off on one control. At least one motor
shall be wired to operate at all times.
Under most circumstances, the
condenser motor nearest the inlet
header should remain on whenever the
compressor is operating.