Trane Agility HDWA - Start-up and Shut-down Procedures; Unit Start-up Procedures

HDWA-SVX001D-EN
61
Unit Start-up and Shut-down
Procedures
WWAARRNNIINNGG
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tthheessee ttaasskkss..
WWAARRNNIINNGG
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((22006688..44 kkPPaaGG)) oonn tthhee ccoonnddeennsseerr..
Unit Start-up
NNOOTTIICCEE
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((UUPPSS)) hhaass bbeeeenn ooppeerraattiinngg pprrooppeerrllyy ffoorr aa mmiinniimmuumm
ooff 1100 hhoouurrss bbeeffoorree ssttaarrttiinngg..
If required, after the system has been operating for
approximately 30 minutes and has become stabilized,
complete the remaining start-up procedure, as follows:
1. Check evaporator and condenser refrigerant
pressures under Condenser and Evaporator Reports
on the Tracer® AdaptiView™. The pressures are
referenced to sea level (14.6960 psia [101.3254
kPaA]).
Temporary Shut-down and Restart
To shut down for a short time, use the following
procedure:
1. Press the STOP key on the Tracer® AdaptiView™.
2. UC800 pump control will turn off the pump (after a
optional water pump delay time) when the STOP
key is pressed and automatically restart the pump
when the “Auto” key is pressed.
3. The unit will start normally, provided the following
conditions exist:
a. The UC800 receives a call for cooling and the
differential-to-start is above the setpoint.
b. All system operating interlocks and safety
circuits are satisfied.
Extended Unit Shut-down
1. Perform the normal unit stop sequence using the
STOP key.
NNoottee:: Unless the water bundles are valved off and
drained, chiller power should remain ON at
all times to allow the magnetic bearings to
levitate the rotor in case water flow-driven
rotation should occur. Trane recommends
leaving the power on to maintain the
Uninterruptible Power Supply (UPS) battery.
2. Verify the chilled water and condenser water
pumps are cycled off. If desired, open disconnect
switches to the pumps.
3. Drain the condenser piping and cooling tower.
4. Remove the drain and vent plugs from the
condenser headers to drain the condenser.
5. After the unit is secured, perform the maintenance
identified in the following sections.
Seasonal Unit Start-up
1. Close all drain valves and reinstall 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 chilled water
circuits.
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. After all
air is removed from the system (including each
pass), install the vent plugs in the evaporator
waterboxes.
SSttaarrtt--uupp aanndd SShhuutt--ddoowwnn