Raypak HD101, HD401 Appendix, Inside Combustion Air Contamination, Daily, Monthly, Quarterly

2.Visually check top of vent for soot. Call service person to clean. Some sediment at bottom of vent is normal.

3.Visually inspect venting system for proper func- tion, deterioration or leakage.

4.Check that heater area is free from combustible materials, gasoline, and other flammable vapors and liquids.

5.Check for and remove any obstruction to the flow of combustion or ventilation air to heater.

6.Follow pre-start-up check in the Initial Start-up section.

7.Visually inspect burner flame. Should see light blue flame. Visually inspect hot surface igniter for damage, cracking or debris build-up.

8.Check operation of safety devices. Refer to manu- facturer’s instructions.

9.Follow oil-lubricating instructions on circulator (if required). Over-oiling will damage circulator. Water-lubricated circulators do not need oiling.

10.To avoid potential of severe burn, DO NOT REST HANDS ON OR GRASP PIPES. Use a light touch - return piping will heat up quickly.

11.Check blower and blower motor. Clean and oil as necessary.

12.Check for piping leaks around circulators, relief valves and other fittings. Repair, if found. DO NOT use petroleum based stop leak.

13.Check air filter and replace if necessary.

Daily:

1.Check that heater area is free from combustible materials, gasoline, and other flammable vapors and liquids.

2.Check for and remove any obstruction to the flow of combustion or ventilation air to heater.

Monthly:

1.Check for piping leaks around circulators, mixing valves, relief valves, and other fittings. If found, repair at once. DO NOT use petroleum-based stop leak compounds.

2.Visually inspect burner flame.

3.Visually inspect venting system for proper func- tion, deterioration or leakage.

4.Check air vents for leakage.

Quarterly:

1. Check relief valve. Refer to manufacturer’s instructions on valve.

2. Test low water cut-off, if used. Refer to manufac- turer’s instructions.

3. Check the air filter; replace if necessary.

APPENDIX

Inside Combustion Air

Contamination:

All heaters experience some condensation during start-up. The condensate from flue gas is slightly acidic. In most cases the pH level is not harmful to vents or drains. When combustion air is contaminated by vapors from products in areas listed below, the acidic levels in the condensate increase. Higher acidic levels attack many materials, including stainless steel commonly used in high efficiency systems.

The heater can use special corrosion-resistant non- metallic intake vent material. You may, however, choose to use outside combustion air for one or more of these reasons:

•installation is in an area containing contaminants listed below which will induce acidic condensation.

•you want to reduce infiltration into your building through openings around windows and doors.

•you are using AL29-4C stainless steel vent pipe, which is more corrosion-resistant than standard metallic vent pipe. In extremely contaminated areas, this may also experience deterioration.

Products causing contaminated combustion air:

• spray cans containing chloro/fluorocarbons

• permanent wave solutions

• chlorinated waxes/cleaners

• chlorine-based swimming pool chemicals

• calcium chloride used for thawing

• sodium chloride used for water softening

• refrigerant leaks

43 • paint or varnish removers