69
110331-07 - 8/23
PHTM II
Combi Installation, Operating & Service Instructions
18
Service and Maintenance
(continued)
Continuously:
1. Keep area around boiler free of combustible
materials, gasoline and other flammable vapors
and liquids.
2. Keep area around combustion air inlet terminal
free from products containing chlorine, chloride
based salts, chlorofluorocarbons, paint removers,
cleaning solvents, or detergents.
3. Keep the boiler room ventilation openings open
and unobstructed.
WARNING
Asphyxiation Hazard. Fire Hazard. Explosion
Hazard.
•
This boiler requires regular maintenance
and service to operate safely.
•
Improper installation, adjustment, alteration,
service or maintenance could result in severe
personal injury, death or substantial property
damage. Read and understand this entire
manual before attempting installation, start-
up operation, or service. Installation and
service must be performed only by a qualified
installer, service agency or gas supplier.
•
Read all instructions contained in component
manufacturer's manuals before installing,
starting up, operating, maintaining or servicing.
!
DANGER
Explosion Hazard. Electrical Shock Hazard.
Burn Hazard.
This boiler uses flammable gas, high voltage
electricity, moving parts, and very hot water
under high pressure. Assure that all gas
and electric power supplies are off and that
the water temperature is cool and system
is depressurized before attempting any
disassembly or service. Do not rely solely
on temperature/pressure gage to make this
determination.
!
WARNING
Burn Hazard.
•
Never jump out or bypass any safety or
operating control or component of this boiler.
•
All cover plates, enclosures and guards must
be in place when boiler is left in operation.
!
NOTICE:
Warranty does not cover boiler damage
or malfunction if the following steps are not
performed at the intervals specified.
1. Inspect vent piping and air intake piping to
verify it is free from leakage and deterioration.
Also verify vent and air intake terminals are
unobstructed.
2. Inspect condensate drain system to verify it is
water tight, and unobstructed.
3. Inspect water and gas lines to verify they are free
from leaks.
If above inspections reveal potential problems,
contact a service agency immediately to further
inspect and repair if necessary.
Annual Inspections and Service:
In addition to inspections listed above, the following
should be performed by a service technician once
every year.
1.
Before inspecting boiler components
A. Follow procedure for turning boiler off found in
Lighting and Operating Instructions.
(Figure 15-10).
B. Turn off all power to boiler.
C. Inspect wiring to verify conductors are in
good condition and attached securely.
WARNING
Electrical Shock Hazard.
Label all wires prior to disconnection when
servicing controls. Wiring errors could cause
improper and dangerous operation. Verify
proper operation after servicing.
D. Verify gas shutoff valve at boiler is closed.
2.
Before servicing gas train components
A. Disconnect air proving switch tube from gas
valve outlet adapter tap.
B. Unplug power and speed control cables from
blower.
C. Unplug ignition and ground wires from ignitor/
flame sensor.
D. Loosen nut on top of gas valve (1-1/8 in.
wrench).
E. Use a 10 mm wrench to remove four nuts
securing burner door to heat exchanger
(Figure 18-1). Carefully remove door/
blower, being careful not to damage the
refractory insulation on inside of door (see
Refractory warning) or ignitor/flame sensor.
!
Monthly Inspections:
