ClimaCool IOM AR2 SERIES - Manual (Page 28)

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PRE-START UP
Before the chiller is started, there are certain essential checks
which must be carried out . Failure to carry out these checks could
result in damage to the chiller voiding the warranty .
Electrical
It is imperative to turn off the main electrical power supply and
follow proper lock-out, tag-out procedures prior to servicing any
of the chiller’s electrical components . The following procedures
can be performed only after the electrical power is confirmed to
be off:
1 . The installation should have been inspected and approved by
the respective agent and found to be in compliance with all
local and national electrical codes .
2 . Check & tighten as required all electrical terminal connections
on each module . Utilize lock-out/tag-out procedures for this
operation . A systematic tightening of all terminals inside the
electrical control panel on each module should be carried
out . This will include the compressor motor terminals, which
would require removal of the compressor terminal cover .
Check connections at each safety and every termination in the
panel .
3 . There are approx . (12) control wires which must be field
connected from each module’s electrical panel back to the
“Master Control Panel” . These control wires should be routed
using a series of twisted pair conductors having #18 AWG
minimum up to 50 ft ., #16 AWG minimum up to 100 ft ., and
#14 AWG min . up to 250 ft . All field wiring must be identified
(tagged) .
4 . All field connections should be checked for tightness .
5 . Check all fuses for proper sizing as indicated on the chiller
data plate and/or the electrical diagram on the inside door of
the electrical panel .
Refrigeration
1 . Remove the front and rear access covers from the top
compressor sound enclosure of each module .
2 . Refrigerant piping and components should be inspected for
damage .
3 . Check all refrigeration and water valves for proper
positioning; once completed mark refrigerant valves with
permanent marker . Make sure all refrigerant valves are fully
opened and there are no visible signs of refrigerant leaks . Pre-
Start Up
4 . Place refrigerant gauges on the discharge and suction access
ports of each refrigerant circuit to ensure a refrigerant charge
is present . Leave the gauges on for compressor rotation check .
5 . Confirm the settings on all pressure switches and thermostats .
Water System
1 . Confirm that leak testing has been carried out .
2 . Confirm that the system is clean .
3 . Confirm that necessary water treatment systems are in place
with both the evaporator and condenser water systems .
4 . Confirm that appropriate water analysis has been conducted
by the end-user .
5 . Confirm that the results of this water analysis does not conflict
with the acceptable constituent ppm levels as indicated in
Table 1, page 16 .
6 . Extract a water sample from both the evaporator and
condenser . Confirm that the sample bottles are filled to the top
leaving no air in the bottles . Both sample bottles must have
labels filled out per instructions included with bottles . Mail
bottles immediately to the appropriate water testing laboratory
as per instructions included with bottles .
7 . Confirm that both the chilled water and condenser water
circulating pumps are operational and water is flowing
through both exchangers .
8 . Shut entering water valve and blow out some water to check
for particles or coloration from suspended particles . Record
the differential pressures across the chiller condenser water
header and across the condenser heat exchanger, measured at
the “Pete’s” ports at each module .
9 . Confirm correct water flow rates through the condenser
and evaporator . Acquire the “predicted” flow rates from
the building’s “hydronics system balancer” . Compare the
measured differential pressures from step 6 above with the
predicted flow rates to ensure proper correlation to the flow
results .
Chiller Pre-Start-Up Procedures
1 . Turn selector switches on module panel off . Fill in circuit
# and power panel identification inside each Module cover
panel .
2 . Ensure the correct fuses are installed in the control
transformer fuse blocks inside each ClimaCool Module . Turn
on the power to each module . The “Power” light should be on .
3 . Override output with DX commissioning program or place
a jumper between compressor 1 start terminals on the “field
wiring” terminal strip (terminals 8 &9) . With jumper in
place, turn on the selector switch marked “compressor #1”
to bump the compressor and check for proper rotation .
Use pressure gauges to verify proper rotation . Once this is
complete and correct rotation is verified, override output
with DX commissioning program or place a jumper between
compressor 2 start terminals on the control terminal strip
(terminals 10 & 11) . Turn on the switch marked “compressor
#2” to bump the compressor and verify that circuit #2
Pre-Start Up