Ingersoll-Rand Trane Ascend ACS, Installation, Operation And Maintenance Manual

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62 AC-SVX002C-EN
Table 29. Freeze protection heater summary
Heater Thermostat
Jumper Heater Description
Heaters
Evap and Water Pipe Heaters
6B52 6X1-2 to 6X1-3
Evaporator
6E50–1
Evap Entering Water
6E50–3
Evap Leaving Water
6E50–2
Pump Package (optional) 6B53
6X2-2 to 6X2-4
6X2–3 to 6x2–5
Water Pump Piping
6E51–1, 6E51–2, 6E51–3,
6E51–4, 6E51–5
Note: Not all heaters are present on all unit configurations. See schematics and component locations in AC-SVE002*-EN.‘
3. Once unit is secured, perform tasks as outlined in
the Maintenance chapter.
Seasonal Unit Start-up
Procedure
1. PRIOR to water being pumped into system, use
gauges to verify positive pressure in the evaporator
and condenser. Lack of pressure could indicate a
system leak. In the event that no pressure is
present, contact local Trane service.
2. Close all drain valves and re-install the drain plugs
in the evaporator.
3. Service the auxiliary equipment according to the
start-up/maintenance instructions provided by the
respective equipment manufacturers.
4. Close the vents in the evaporator chilled water
circuits.
5. Open all the valves in the evaporator chilled water
circuits.
6. Open all refrigerant valves or verify they are in the
open condition.
7. 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), install the vent plugs.
8. Check the adjustment and operation of each safety
and operating control.
9. Refer to the sequence for daily unit startup for the
remainder of the seasonal startup.
System Restart After Extended
Shutdown
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Follow the procedures below to restart the unit after
extended shutdown:
1. Check refrigerant pressure as noted in Seasonal
Unit Start-Up procedure.
2. Verify that the liquid line service valves, oil line,
compressor discharge service valves and suction
service valves are open (backseated).
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3. Check the oil sump level. See instructions in
Maintenance chapter.
4. Fill the evaporator water circuit. Vent the system
while it is being filled. Open the vent on the top of
the evaporator and condenser while filling and
close when filling is completed.
N NO OT TIIC CE E
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5. Close the fused-disconnect switches that provides
power to the chilled water pump.
6. Start the evaporator water pump and, while water
is circulating, inspect all piping for leakage. Make
any necessary repairs before starting the unit.
7. While the water is circulating, adjust the water
flows and check the water pressure drops through
the evaporator. See Evaporator Waterside Pressure
Drop Curves in Installation Mechanical chapter, and
water flow rates in General Data tables..
8. Verify proper operation of flow switch on the
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