Seasonal Unit Start-Up Procedure; System Restart After Extended Shutdown - Trane RTAD 085 Installation Operation & Maintenance

RTAD-SVX01F-E4
Unit Start-up Procedures
Seasonal Unit Start-Up
Procedure
1 Close all valves and re-install the
drain plugs in the evaporator.
2 Service the auxiliary equipment
according to the start-
up/maintenance instructions
provided by the respective
equipment manufacturers.
3 Close the vents in the evaporator
chilled water circuits.
4 Open all the valves in the
evaporator chilled water circuits.
5 Open all refrigerant valves to
verify they are in the open
condition.
6 If the evaporator was previously
drained, vent and fill the
evaporator and chilled water
circuit. When all air is removed
from the system , re-install the
vent plugs on top of the
evaporator shell.
CAUTION! Ensure that the
compressor and oil separator
heaters have been operating for a
minimum of 24 hours before
starting. Failure to do so may result
in equipment damage.
7 Check the adjustment and
operation of each safety and
operating control.
8 Close all disconnect switches.
9 Refer to the sequence for daily unit
startup for the remainder of the
seasonal startup.
System Restart After
Extended Shutdown
Follow the procedures below to
restart the unit after extended
shutdown:
1 Verify that the liquid line service
valves, oil line, compressor
discharge service valves (when
supplied) are open (backseated).
CAUTION! To prevent damage to the
compressor, be sure that all
refrigerant valves are open before
starting the unit.
2 Check the oil separator oil level
(see Maintenance Procedures
section).
3 Fill the evaporator water circuit.
Vent the system while it is being
filled. Open the vent on the top of
the evaporator while filling and
close when filling is completed.
CAUTION! Do not used untreated or
improperly treated water.
Equipment damage may occur.
4 Close the fused-disconnect
switches that provides power to
the chilled water pump.
5 Start the evaporator water pump
and, while water is circulating,
inspect all piping for leakage.
Make any necessary repairs before
starting the unit.
6 While the water is circulating,
adjust the water flows and check
the water pressure drops through
the evaporator. Refer to "Water
System Flow Rates" and "Water
System Pressure Drop".
7 Adjust the flow switch on the
evaporator piping for proper
operation.
8 Stop the water pump. The unit is
now ready for start-up as
described in "Start-Up
Procedures".
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