Raypak 300, 850 Combustion Chamber Coil Cleaning Instructions, NIOSH stated First Aid

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.

Combustion Chamber Coil 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 XFyre boiler by using the following 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 XFyre 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.Remove the (4) screws on the aluminum ¾” NPT connector on the right side of the gas valve.

e.Disconnect the wiring connected to the com- bustion blower motor.

f.Remove the (6) 10mm nuts from the burner plate assembly.

g.Pull the entire burner plate assembly (with blower still attached) towards you, while removing or pushing aside any wiring to allow the removal of the assembly.

2.Using a spray bottle filled with the recommended product “RYDLYME” or “CLR”, spray liberally on the coils, making sure the solution penetrates and fun- nels 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 coils to remove any buildup, then vacuum the debris from the coils. Be sure to fol- low the precautions listed for working with ceramic fibers.

4.Spray the coils with clear water, making sure to con- fine the spray to the area being cleaned (Try to avoid getting the back ceramic wall of the unit wet). Flush the combustion chamber with fresh water until clear water runs from the condensate drain. At this point, the XFyre should be ready to be re- assembled.

a. Inspect gaskets.

b. Re-install the burner assembly.

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