Operation; Unit Operation; Weekly Start Up And Week-End Shutdown; Seasonal Start-Up And Shutdown - Trane CGCL 200 Installation Operation & Maintenance

16

Operation

Control System
The control is through the CH530
control module.

Unit operation

- Check the chilled water pump(s)
operates
- Start up unit using CH530. 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 CH530
control module setpoint.
Weekly start up
- Check the chilled water pump(s)
operates
- Start the unit through the control
module.
Week end shutdown
- If the unit needs to be shut down
for a short period of time, stop the
unit through the control module.
- If the unit is shut down for a
longer period, see under
"Seasonal shutdown", below.
- Insure that all safeties are taken to
prevent frost damages during
negative ambient temperature.
(see page 5)
- 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 through the control
module.
- Insure that all safeties are taken to
prevent frost damages during
negative ambient temperature.
(see page 5)
- 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
CGCL-SVX01B-E4