60
Combustion Chamber Cleaning
Instructions
Before beginning this procedure, you must have on
hand the following items:
– a nylon, stainless steel or brass brush (not steel)
– “Rydlyme” (recommended for best results) or
“CLR”
– Gloves, eye protection
1. Shut down the XPak FT boiler by using the follow-
ing steps:
a. Close the gas valve, shut down the unit and
wait for the unit to be cool to the touch.
b. Disconnect the condensate piping from the out-
side connection, (not from the XPak FT boiler
side), so the flow from condensate reservoir
can be observed.
c. Disconnect electrical connections from the gas
valve, spark electrode and flame rectification
probe and combustion blower.
d. Disconnect the gas line by loosening union
above the shut-off valve.
e. Disconnect the wiring connected to the com-
bustion blower motor.
f. Remove the 10mm nuts from the burner plate
assembly.
g. Remove the valve/blower/burner assembly
with refractory from the heat exchanger.
2. Using a spray bottle filled with the recommended
product “RYDLYME” or “CLR”, spray liberally on the
heat exchanger, making sure the solution pene-
trates and funnels down through the condensate
system. If the condensate system is blocked, let the
chemical penetrate for at least 15 minutes or until it
drains.
3. Use the nylon, stainless steel or brass brush (do not
use steel) to scrub heat exchanger to remove any
buildup, then vacuum the debris from the heat
exchanger.
4. Spray the heat exchanger with clear water, making
sure to confine the spray to the area being cleaned.
Flush the combustion chamber with fresh water
until clear water runs from the condensate drain. At
this point, the XPak FT should be ready to be re-
assembled.
a. Inspect gaskets.
b. Re-install the burner assembly.
WARNING:
The combustion chamber insulation in this product
contains ceramic fiber material. Ceramic fibers can
be converted to cristobalite in very high temperature
applications. The International Agency for Research
on Cancer (IARC) has concluded that “Crystalline
silica inhaled in the form of quartz or cristobalite from
occupational sources is carcinogenic to humans
(Group1).”:
Avoid breathing dust and contact with skin and
•
eyes.
Use NIOSH certified dust respirator (N95).
•
This type of respirator is based on the OSHA
requirements for cristobalite at the time this
document was written. Other types of respirators
may be needed depending on the job site
conditions. Current NIOSH recommendations
can be found on the NIOSH website at
http://www.cdc.gov/niosh/homepage.html.
NIOSH approved respirators, manufacturers,
and phone numbers are also listed on this
website.
Wear long-sleeved, loose fitting clothing, gloves,
•
and eye protection.
Apply enough water to the combustion chamber
•
lining to prevent dust.
Wash potentially contaminated clothes
•
separately from other clothing. Rinse clothes
washer thoroughly.
NIOSH stated First Aid:
Eye: Irrigate immediately
Breathing: Fresh air.
Summary of Contents for 88AR-398A
Page 18: ...18 Fig 13 MODE 1 Single Boiler Primary Secondary Piping...
Page 19: ...19 Fig 14 MODE 2 Single Boiler Primary Secondary Piping with Indirect DHW on System Loop...
Page 20: ...20 Fig 15 MODE 3 Single Boiler Primary Secondary Piping with Indirect DHW on Boiler Loop...
Page 47: ...47 WIRING DIAGRAM Fig 46 Wiring Diagram...
Page 54: ...54 Fig 55 Boiler Lighting Shut Off Instructions...
Page 65: ...65 ILLUSTRATED PARTS LIST...
Page 66: ...66...
Page 67: ...67...
