Operating instructions

TRANSFORMER PROTECTION
The transformer is of the energy-limiting type. It is set to
withstand a 30°sec. overload or shorted secondary condition.
PPdE-START-UP
Failure to observe the following warnings could result in
serious injury:
1. Follow recognized safety practices and wear protective
goggles when checking or servicing refrigerant system.
2. Do not operate compressor or provide any electric power to
unit unless compressor terminal cover is in place and
secured.
3. Do not remove compressor terminal cover until all electri-
cal sources are disconnected.
4. Relieve and recover all refrigerant from system before
touching or disturbing anything inside terminal box ff
refrigerant leak is suspected around compressor terminals.
5. Never attempt to repair soldered connection while refrig-
erant system is under pressure.
6. Do not use torch to remove any componenL System
contains oil and refrigerant under pressure. To remove a
component, wear protective goggles and proceed as fol-
lows:
a. Shut off gas supply and then electrical power to unit.
b. Relieve and recover all refrigerant from system using
both high- and low-pressure ports.
c. Cut component connecting tubing with tubing cutter and
remove component from unit.
d. Carefully unsweat remaining tubing stubs when neces-
sary. Oil can ignite when exposed to torch flame.
Proceed as follows to inspect and prepare the unit for initial
startup:
1. Remove access panel.
2. Read and follow instructions on all WARNING, CAUTION,
and INFORMATION labels attached to, or shipped with, unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages such as broken
lines, loose parle, disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections and on
unit base. Detecting oil generally indicates a refrigerant
leak.
c. Leak test all refrigerant tubing connections using electronic
leak detector, halide torch, or liquid-soap solution. If a
refrigerant leak is detected, see the Check for Refrigerant
Leaks section.
d. Inspect all field- and factery-wirlng connections. Be sure
that connections are completed and tight.
e. Ensure wires do not contact refrigerant tubing or sharp
sheet metal edges.
f. Inspect coil f'ms. If damaged during shipping and handling,
carefully straighten fins with a i'm comb.
4. Verify the following conditions:
a. Make sure gas line is free of air. Before lighting the unit for
the first time, perform the following with the gas valve in
the "OFF" position:
If the gas supply pipe was not purged before connecting
the unit, it will be full of air. It is recommended that the
ground joint union be loosened, and the supply line be
allowed to purge until the odor of gas is detected. Never
purge gas lines into a combustion chamber. Immediately
upon detection of gas odor, retighten the union. Allow 5
minutes to elapse, then light unit.
b. Make sure that condenser-fan blade is correctly positioned
in fan orifice. Leading edge of condenser-fan blade should
be 1/2 in. maximum from fan orifice ventari.
c. Ensure fan hub is 1/8 in. maximum from motor housing
(See Fig. 12).
MOTORAND FANHUB MOTORSHAFT
C99009
Fig. 12--Fan Blade Clearance
15
MANIFOLD
Fig. 13_Burner Assembly
d. Make sure that air falter(s) is in place.
PIPE PLUG
C99019
e. Make sure that condensate drain trap is filled with water to
ensure proper drainage.
f. Make sure that all tools and miscellaneous loose parts have
been removed.
START-UP
Step I_CHECK FOR REFRIGERANT LEAKS
Proceed as follows to locate and repair a refrigerant leak and to
charge the unit:
1. Locate leak and make sure that refrigerant system pressure has
been relieved and reclaimed from beth high- and low-pressure
por_.
2. Repair leak following Refrigerant Service procedures.