Trane CGWH 115 - Operation; Control and Unit Operation; Weekly Start up and Week-End Shutdown; Seasonal Shutdown and Start-Up

21CGWH-SVX01D-E4
Operation
Control System
The control is through the CH530
control module.
Unit operations
• Check the chilled water pump(s)
operates
• Start the unit with the CH530
by pushing «Auto». The unit
will operate correctly when
there is sufficient water flow.
The compressors will start up
if the evaporator water leaving
temperature is above the control
module setpoint.
Weekly start up
• Check the chilled water pump(s)
operates
• Push «Auto» on the module to
allow chiller operation.
Week end shutdown
• If the unit needs to be shut down
for a short period of time,
• Stop the unit with the CH530 by
pushing «Stop».
• If the unit is shut down
for a longer period, see
under»Seasonal shutdown»,
below.
• nsure that all the safeties are
taken to protect the compressor
against refrigeration migration
• Do not put the general and
control disconnect switches to
off.
Seasonal shutdown
• Check water flows and interlocks.
• Check Ethylene glycol % in the
chilled water circuit if glycol
presence is required
• Carry out leak test.
• Carry out oil analysis
• Record operating pressures,
temperatures, amperages and
voltage.
• Check operation of machines/
compare conditions of operation
against original commissioning
data.
• Stop the unit with the CH530 by
pushing «Stop».
• Insure that all the safeties are
taken to protect the compressor
against refrigeration migration
• Fill out the visit log sheet and
review with the operator
• Do not put the general and
control disconnect switches to
off.
Seasonal start-up
• Check water flows and interlocks.
• Check Ethylene glycol % in the
chilled water circuit if glycol
presence is required
• Check operational set points and
performance.
• Calibrate controls.
• Check operation of all safety
devices.
• Inspect contacts and tighten
terminals.
• Megger the motor compressor
windings.
• Record operating pressures,
temperatures, amperages and
voltage.
• Carry out leak test.
• Check configuration of unit
control module.
• Change the oil as required based
upon results of the oil analysis
made during seasonal shutdown
• Check operation of machines/
compare conditions of operation
against original commissioning
data.
• Fill out the visit log sheet and
review with the operator