Shutdown; Temporary Shutdown And Restart; Extended Shutdown Procedure - Trane R Series Installation, Operation And Maintenance Manual

Shutdown

Temporary Shutdown And
Restart
To shut the unit down for a short time, use the following
procedure:
1. Press the STOP key on the CH530.The compressors
will continue to operate and, after an unloading period
(which may be followed by pumpdown cycle in
outdoor ambients below 50
compressor contactors de-energize.
2. CH530 pump control will turn off the pump (after a
minimum 1 min. delay) when the STOP key is pressed
and automatically restart the pump when the unit
starts normally.
3. The unit will start normally, provided the following
conditions exist:
a. The CH530 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 Shutdown Procedure

The following procedure is to be followed if the system is
to be taken out of service for an extended period of time,
e.g. seasonal shutdown:
1. Test the unit for refrigerant leaks and repair as
necessary.
2. Open the electrical disconnect switches for the chilled
water pump. Lock the switches in the "OPEN" position.
NOTICE:
Equipment Damage!
To prevent pump damage, lock the chilled water pump
disconnects open.
3. Close all chilled water supply valves. Drain the water
from the evaporator.
4. With the water drained from evaporator, the "customer
provided" power for the 120-volt evaporator heaters
(terminated at 1TB4...terminals 1 & 2) must be must
disconnect.
These heaters consist of 1 well heater in each
evaporator end (or water box), and the heat tape, which
is wrapped around the bundle itself.They are
energized by a klixon temperature control mounted on
the side of the evaporator, which energizes at or below
o
37 F . outside air temp. If there is no liquid in the
evaporator and the temp drops below 37 degrees, both
of the well heaters will burn up because they have no
liquid to transfer their heat into.
5. Open the unit main electrical disconnect and unit-
mounted disconnect (if installed) and lock on the
136
o
F), will stop when the
"OPEN" position. If the optional control power
transformer is not installed, open and lock the 115V
disconnect.
NOTICE:
Equipment Damage!
If insufficient concentration or no glycol is used, the
evaporator water pumps must be controlled by the
CH530 to avoid severe damage to the evaporator due to
freezing. A power loss of 15 minutes during freezing
can damage the evaporator. It is the responsibility of
the installing contractor and/or the customer to ensure
that a pump will start when called upon by the chiller
controls.
Please consult Table 27, p. 54
of glycol.
The warranty will be void, in case of freezing due to the
lack of use of either of these protections
NOTICE:
Equipment Damage!
Lock the disconnects in the "OPEN" position to
prevent accidental start-up and damage to the system
when it has been setup for extended shutdown.
6. At least every three months (quarterly), check the
refrigerant pressure in the unit to verify that the
refrigerant charge is intact.
for correct concentration
RTAC-SVX01J-EN