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CVHE-SVU01E-EN
86
When the cooling requirement is
satisfied, the UCP originates a
“Shutting down” signal. The inlet
guide vanes are driven closed for 50
seconds, and the unit enters a 3-
minute post-lube period. The
compressor motor and condenser
water pump starter are de-energized
immediately, but the oil pump
continues to run during this 3-minute
interval; the evaporator pump will
continue to run.
Once the post-lube cycle is done, the
unit returns to auto mode.
Seasonal Unit Start-Up
1. Close all drain valves, and re-
install the drain plugs in the
evaporator and condenser
headers.
2. Service the auxiliary equipment
according to the start-up and
maintenance instructions provided
by the respective equipment
manufacturers.
3. Vent and fill the cooling tower, if
used, as well as the condenser
and piping. At this point, all air
must be removed from the system
(including each pass). Then close
the vents in the condenser water
boxes.
Unit Startup
4. Open all of the valves in the
evaporator chilled water circuit.
5. If the evaporator was previously
drained, vent and fill the evaporator
and chilled water circuit. When all
air is removed from the system
(Including each pass), close the
vent valves in the evaporator water
boxes.
6. Lubricate the external vane control
linkage as needed.
7. Check the adjustment and
operation of each safety and
operating control.
8. Close all disconnect switches.
9. Perform instructions listed in
“Daily Unit Start-up” section.
ƽƽ
ƽƽ
ƽ WARNING
Live Electrical
Components!
During installation, testing, servicing
and troubleshooting of this product,
it may be necessary to work with
live electrical components. Have a
qualified licensed electrician or other
individual who has been properly
trained in handling live electrical
components perform these tasks.
Failure to follow all electrical safety
precautions when exposed to live
electrical components could result in
death or serious injury.
ƽƽ
ƽƽ
ƽ WARNING
Toxic Hazards!
• Do not run evaporator water pump
longer than 30 minutes after the
chiller is shutdown.
• Ensure that the evaporator is
isolated from the hot water loop
before changeover to heating
mode.
Do not allow the chiller to increase
above 110°F in temperature while
unit is off. Failure to prevent high
chiller temperature will cause the
inside pressure to rise. The rupture
disk is designed to relieve and
discharge the refrigerant from the
unit if the pressure in the evaporator
exceeds 15 PSIG (103.4 Kpa). A
significant release of refrigerant into
a confined space due to a rupture
disk failure could displace available
oxygen to breathe and cause
possible asphyxiation. Should a
rupture disk fail, evacuate the area
immediately and contact the
appropriate rescue or response
authority. Failure to take appropriate
precautions or react properly to a
potential hazard could result in
death or serious injury.