Heatcraft Refrigeration Products H-IM-CU warranty Check Out and Start Up

Check Out and Start Up

After the installation has been completed, the following points should be covered before the system is placed in operation:

a)Check all electrical and refrigerant connections. Be sure they are all tight.

b)Observe compressor oil level before start-up. The oil level should be at or slightly above the 1/4 level

of the sight glass. Refer to Table 3 for proper compressor oil.

c)Remove upper mounting nuts on the compressor feet.

Remove the shipping spacers. Install the neoprene washers onto the compressor feet. Replace the upper mounting nuts

and washers, allowing 1/16" space between the mounting nut and the neoprene spacer.

d)Check high and low pressure controls, pressure regulating valves, oil pressure safety controls, and all other safety controls, and adjust if necessary.

e)Check the room thermostat for normal operation and adjust.

f)Wiring diagrams, instruction bulletins, etc. attached to the condensing units should be read and filed for future reference.

g)All fan motors should be checked for proper rotation. Fan motor mounts should be carefully checked for tightness and proper alignment.

h)Electric and hot gas evaporator fan motors should be temporarily wired for continuous operation until the room temperature has stabilized.

i)Observe system pressures during charging and initial operation. Do not add oil while the system is short of refrigerant

unless oil level is dangerously low.

j)Continue charging until system has sufficient refrigerant for proper operation. Do not overcharge.

Remember that bubbles in a sight glass may be caused by a restriction as well as a shortage of refrigerant.

k)Do not leave unit unattended until the system has reached normal operating conditions and the oil charge has been properly adjusted to maintain the oil level between 1/4 and bottom of the sight glass.

l)Make sure all Schrader valve caps are in place and tight.

m)Make sure ALL service valves are properly back-seated and tighten valve packing if necessary.

CAUTION:

Extreme care must be taken in starting compressors for the first time after system charging. At this time, all of the oil and most of the refrigerant might be in the compressor creating a condition which could cause compressor damage due to slugging. Activating the crankcase heater for 24 hours prior to start-up is required. If no crankcase heater is present, then directing a 500 watt heat lamp or other safe heat source on the lower shell of the compressor for approximately thirty minutes will be beneficial in eliminating this condition which might never reoccur.

WARNING:

Scroll compressor is directional dependent. If noisy, change phase of input wiring. 

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