Trane R Series Installation Operation & Maintenance page 99

Unit Start-Up Procedures
– 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. sea-
sonal shutdown:
1. Test the unit for refrigerant leaks and
repair as necessary.
2. Open the electrical disconnect switch-
es for the chilled water pump. Lock the
switches in the "OPEN" position.
CAUTION
Chilled Water Pump!
Lock the chilled water pump discon-
nects open, to prevent pump damage.
3. Close all chilled water supply valves.
Drain the water from the evaporator.
4. With the water drained from evapora-
tor, the "customer provided" power for
the 120-volt evaporator heaters (termi-
nated 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 tempera-
ture control mounted on the side of the
evaporator, which energizes at or below
37oF. outside air temp. If there is no liq-
uid in the evaporator and the temp drops
below 37 degrees, both of the well heat-
ers will burn up because they have no
liquid to transfer their heat into.
5. Open the unit main electrical discon-
nect and unit-mounted disconnect (if in-
stalled) and lock on the "OPEN" position.
If the optional control power transformer
is not installed, open and lock the 115V
disconnect.
CAUTION
Disconnect Power!
Lock the disconnects in the "OPEN"
position to prevent accidental start-
up and damage to the system when
it has been setup for extended shut-
down.
6. At least every three months (quarter-
ly), check the refrigerant pressure in the
unit to verify that the refrigerant charge
is intact.
99 RTAC-SVX002A-EN