Startup And Shutdown - McQuay seasoncon ALP-067A Installation And Maintenance Data

Pre Start--Up
1. With all electric disconnects open, check all screw or lug type
electrical connections to be sure they are tight for good elec-
trical contact.
fore shipment,
vibration.
a) On chilled water installations, check to see that all water
2 .
piping is properly connected.
b) Open all water flow valves and start the chilled water pump.
Check all piping for leaks and vent the air from the evaporator
and system piping to obtain clean, non-corrosive water in the
evaporator circuit.
Check the compressor oil level.
3 .
should cover at least l/2 of the oil sight glass.
Remove the
4 . (8)
compressor rails and the base of the unit.
do not have shipping blocks.
Check the voltage of the unit power supply and see that it is
5 .
within the + 10% tolerance that is allowed.
ance must be within t
6. Check the unit power supply wiring for adequte ampacity and a
minimum insulation temperature rating of 75C.
7 . Verify that all mechanical and electrical inspections have been
completed per local codes.
8 . See that all auxiliary control equipment is operative and that
an adequate cooling load is available for initial start up.
Initial Start-Up
1. Open the compressor suction and discharge shutoff valves until
back seated.
2. Open the manual liquid line shutoff valve at the outlet of the
subcooler.
Check to see that pumpdown switches (PSl &
3 .
pumpdown" position and the control stop switch (Sl) is in the
4. Adjust the dial on the temperature controller to the desired
chilled water or leaving air temperature.
Throw the main power and control circuit disconnects to the "on"
5 .
position.
CAUTION:
Most relays and terminals in the unit control center are
hot with Sl and the control circuit disconnect on.
Allow the crankcase heaters to operate for at least 8 hours prior
6 .
to start-up.
Start the auxiliary equipment for the installation.
7 .
8. Start the system by moving pumpdown switches (PSl & PS2) to the
"auto. pumpdown" position.
After system performance has stabilized, it is necessary that the
9.
"Compressorized Equipment Warranty Form" (form no. 206036A) be
completed to obtain full warranty benefits.
with the unit and after completion should be returned to McQuay's
Service Department through your sales representative.
START-UP AND SHUT-DOWN
Although all factory connections are tight be-
some loosening may have resulted from shipping
compressor shipping blocks that are attached to the
2%.
Always replace valve seal caps.
Prior to start-up, the oil level
The ALP 067 and 078
Phase voltage unbal-
are in the Isman.
PS2)
This form is shipped
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