Appendix, Inside Combustion Air Contamination, Daily

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

HD101, HD401 specifications

Raypak is renowned for its commitment to high-quality heating solutions, with the HD101 and HD401 models standing out in their product range. These units are designed specifically for commercial applications, providing reliable and efficient hydronic heating systems. The HD series embodies innovation while addressing the unique demands of larger spaces.

One of the main features of the HD101 and HD401 is their stainless steel construction, which ensures increased durability and resistance to corrosion. This design choice enhances the longevity of the units, making them ideal for various installations in commercial or industrial settings.

Both models are equipped with a high-efficiency heat exchanger that maximizes heat transfer while minimizing energy consumption. This feature is particularly significant in today’s environmentally conscious market, as it contributes to lower operating costs and reduced carbon footprints. The heat exchangers are engineered for easy maintenance, offering simplicity when service is required.

In terms of technology, the HD101 and HD401 include advanced digital controls that allow for precise temperature regulation. This user-friendly interface enables operators to easily manage and monitor heating parameters, facilitating optimal performance and energy management.

The models also feature modulating burners that adjust their output according to the heating demand. This capacity for modulation results in smoother operation and an overall increase in efficiency, as the burners can maintain consistent temperatures without excessive energy use.

Another noteworthy characteristic is their compatibility with various control systems, including BMS (Building Management Systems). This adaptability allows for seamless integration into existing infrastructure, providing users with greater versatility and control over their heating environments.

Both the HD101 and HD401 come with advanced safety features, including flame rollback protection and pressure monitoring, ensuring safe operation even in demanding conditions. Additionally, their compact design allows for easy installation in limited spaces while still providing powerful heating capabilities.

Ultimately, the Raypak HD101 and HD401 are exceptional choices for those in need of high-efficiency commercial heating solutions. With their robust construction, advanced technology, and user-friendly features, these models promise to deliver reliable performance and energy savings for years to come. Whether for a large facility or a specific industrial application, they stand ready to meet the heating challenges of today’s commercial landscape.