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PY5G--B: Installation Instructions
board or Integrated Gas Controller. Replace fuse as required with correct
size and rating.
Pre-Start-up
WARNING
!
ENVIRONMENTAL, FIRE, EXPLOSION, ELECTRICAL
SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
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 plug is in place and secured.
3.
Do not remove compressor plug until all electrical sources are
disconnected and tagged.
4.
Relieve and recover all refrigerant from system before touching
or disturbing compressor plug if refrigerant leak is suspected
around compressor terminals.
5.
Never attempt to repair soldered connection while refrigerant
system is under pressure.
6.
Do not use torch to remove any component. System contains oil
and refrigerant under pressure.
To remove a component, wear protective goggles and proceed
as follows:
a. Shut off electrical power to unit and install lockout tag.
-Relieve and reclaim all refrigerant from system using both
high- and low-pressure ports.
-Cut component connecting tubing with tubing cutter and
remove component from unit.
-Carefully unsweat remaining tubing stubs when necessary. Oil
can ignite when exposed to torch flame.
Use the Start-Up Checklist supplied at the end of this book and proceed
as follows to inspect and prepare the unit for initial start-up:
1. Remove access panels (see
2. Read and follow instructions on all DANGER, WARNING,
CAUTION, and INFORMATION labels attached to, or shipped
with unit.
3. Make the following inspections:
a. Inspect for shipping and handling damage, such as broken lines,
loose parts, disconnected wires, etc.
b. Inspect all field- and factory-wiring connections. Be sure that
connections are completed and tight.
c. Ensure wires do not touch refrigerant tubing or sharp sheet metal
edges.
d. Inspect coil fins. If damaged during shipping and handling,
carefully straighten fins with a fin comb.
WARNING
!
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death or
property damage.
Do not purge gas supply into the combustion chamber. Do not use a
match or other open flame to check for gas leaks.
Use a commercially available soap solution made specifically for the
detection of leaks to check all connections. A fire or explosion may
result causing property damage, personal injury or loss of life.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig.
25).
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:
NOTE: 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. Ensure fan hub is positioned correctly with respect to motor
housing.
c. Make sure that air filter(s) is in place.
d. Make sure that condensate drain trap is filled with water to
ensure proper drainage.
e. Make sure that all tools and miscellaneous loose parts have been
removed.
!
FIRE, INJURY, OR DEATH HAZARD
Failure to follow this warning could result in property damage, personal
injury, or death.
Do not bypass any of the safety controls in the unit, including but not
limited to the main limit switch, rollout or burner rollout switch, and
pressure switch/pressure transducer.
Step 1 – Check for Refrigerant Leaks
!
EXPLOSION HAZARD
Failure to follow this warning could result in
death, serious personal injury, and/or property
damage.
Never use air or gases containing oxygen for
leak
compressors. Pressurized mixtures of air or
gases containing oxygen can lead to an
explosion.
Work procedure for service:
1. All maintenance staff and others working in the local area shall be
instructed on the nature of work being performed. Any nearby
confined space work shall be avoided.
2. If any hot work is to be conducted on the refrigeration system or
associated parts, a fire extinguisher shall be available on hand. A
dry powder or CO2 fire extinguisher shall be located near the
refrigerant charge recovery area.
3. Potential ignition sources, including cigarette smoking, must not be
used by the technician and must be kept far away from the unit site.
4. Ensure that electrical power is available to run recovery equipment
prior moving to the next step.
5. Using a R-454B leak detector, check around the area of the unit for
presence of refrigerant. Note: Leak detector must be non-sparking
and adequately sealed. Under no circumstances shall potential
sources of ignition be used for detection of leaks, including leak
detection equipment. A halide torch (or any other detector using a
naked flame) shall not be used. Electronic leak detectors may be
used to detect refrigerant leaks, but in the case of R-454B, the
sensitivity may not be adequate or may need re-calibration
(Detection equipment shall be calibrated in a refrigerant-free area).
16
Start-up
WARNING
WARNING
testing
or
operating
refrigerant
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