heatcraft-refrigeration-p h-im-fl1a User Manual

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. 

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.

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. 

 

Provide adequate space at the compressor end of the unit for 

servicing. Provide adequate space on the connection side to 

permit service of components. 

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.

Some products use rigid mounted compressors. Check the 

compressor mounting bolts to insure they have not vibrated 

loose during shipment.

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.