RTAD-SVX01F-E4 83
Maintenance Procedures
Evaporator Heat Tape
Checkout Procedure
CAUTION! If the heat tapes wrapped
around the evaporator barrel fail, the
evaporator will freeze causing
catastrophic damage to the entire
unit.
To check the heat tapes wrapped
around the barrel follow the
procedures below.
1 Locate the connection under the
evaporator insulation near the
bottom of the barrel.
CAUTION! Do not cut past the
evaporator insulation. Electrical
damage to the heat tape wires will
occur if cutting of the insulation is
done improperly.
The resistance can be checked with
an ohmmeter to determine if there is
an open or a short. If a heater has
failed, replace as follows:
1 Remove the insulation around the
heater.
2 Remove the old heater.
3 The factory installed heaters have
the wire run under the insulation
of the evaporator. This can be
copied by cutting a small strip of
insulation out and replacing it with
tape.
4 Replace any insulation that was
removed.
5 Wire the heaters into the system
as per the wiring diagram.
6 Recheck the resistance to verify
that they are wired correctly.
Safety recommendations
To avoid accidents and damage, the
following recommendations should
be observed during maintenance
and service visits:
1. The maximum allowable
pressures for system leak testing
on low and high pressure side are
given in the chapter "Installation".
Always provide a pressure
regulator.
2. Disconnect the main supply
before any servicing on the unit.
3. Service work on the refrigeration
system and the electrical system
should be carried out only by
qualified and experienced
personnel.
To Next Page
Loading...
Need help?
General
