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577C--(E, F) Ultra Low NOx: Installation Instructions
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.
b. Relieve and reclaim 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 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.
4. Verify the following conditions:
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig.
22).
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.
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 testing or operating refrigerant compressors.
Pressurized mixtures of air or gases containing
oxygen can lead to an explosion.
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 both high- and low-pressure ports.
2. Repair leak following accepted practices.
NOTE: Install a filter drier whenever the system has been opened for
repair.
3. Add a small charge of Puron (R-410A) refrigerant vapor to system
and leak-test unit.
4. Recover refrigerant from refrigerant system and evacuate to 500
microns if no additional leaks are found.
5. Charge unit with Puron (R-410A) refrigerant, using an accurate
scale. Refer to unit rating plate for required charge.
Step 2 – Start-up Heating and Make Adjustments
Complete the required procedures given in the Pre-Start-Up section
before starting the unit. Do not jumper any safety devices when
operating the unit. Make sure that burner orifices are properly aligned.
Unstable operation my occur when the burner orifices in the manifold
are misaligned.
Follow the lighting instructions on the heating section operation label
(located on the inside of the control access panel) to start the heating
section.
NOTE: Make sure that gas supply has been purged, and that all gas
piping has been checked for leaks.
13
Start-up
WARNING
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