74
LP- 293 REV. 9.2.14
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,
“Crystalline silica inhaled in the form of quartz or cristobalite from occupational sources is carcinogenic to humans (Group
1).”
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 job site conditions.
Current NIOSH recommendations can be found on the NIOSH website: 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.
B. COMBUSTION CHAMBER COIL CLEANING INSTRUCTIONS FOR BOILER
*Before beginning this procedure, you must have on hand the following items:
a nylon, stainless steel or brass brush (not steel)
an FDA approved liquid lime scale remover, in a spray bottle
gloves and eye protection
1. Shut down the Boiler by using the following steps:
a. Shut down the appliance. Close the gas valve. Wait for the appliance to be cool to the touch.
b. Disconnect the condensate piping from the outside connection, (not from the Boiler side), so flow from condensate reservoir
can be observed.
c. Remove the front panel of the boiler by firmly pulling the panel toward you until it releases.
d. Open the control door by turning the hand tightened nut counter-clockwise.
e. Disconnect electrical connections from the gas valve, spark electrode, flame rectification probe and combustion blower.
f
. Remove the (4) screws on the aluminum ¾” NPT connector on the right side of the gas valve.
g. Disconnect the wiring connected to the combustion blower motor.
h. Remove the (6) 10MM nuts from the burner plate assembly.
Figure 34
i. Pull the entire burner plate assembly with blower still attached towards you. Remove or push aside any wiring to allow the
removal of the assembly.
2. Using a spray bottle filled with the FDA approved lime scale remover, spray liberally on the coils, making sure the solution penetrates
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) and scrub coils to remove any buildup. Then vacuum the debris from
the coils.
Summary of Contents for EL-110
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