Raypak B-195 installation instructions Code Requirements, LEG Installation, Clearance Requirements

3. INSTALLATION PROCEDURES.

CODE REQUIREMENTS

Installation must be in accordance with local codes, or in the absence of local codes with the latest edition of the National Fuel Gas Code, ANSI Z223.1, the National Electrical Code, ANSI/NFPA 70. For Canada, CAN/

CGA B149.1 and .2, and CSA C22.2 No. 1.

LEG INSTALLATION

Four (4) legs are supplied loose within the carton for installation at the site. This will provide the required six- inch clearance off the floor. To install the legs, raise one end of the heater just high enough to allow the legs to be screwed into the two corners of that end. Make sure each leg is tightened securely by hand. Lower the heater gently to minimize any undue strain on the two (2) legs. Gently raise the other end, and repeat the same procedure for the other two (2) legs. Rotate the lower section of each leg as necessary to level the heater in place.

Booster water heater should not be located in an area where water leakage will result in damage to the area adjacent to it or to lower floors of the structure. Where such areas cannot be avoided, it is recommended that a suitable catch pan, adequately drained, be installed under this heater. Do not install directly on carpeting.

CLEARANCE REQUIREMENTS

Floor	Top	Left	Right	Front	Back	Vent
		Side	Side
*	0"	6"	6"	Alcove	6"	1"

*Approved for installation on combustible flooring.

A front clearance of at least 24" is recommended for adequate service of burner-tray and controls.

COMBUSTION/VENTILATION AIR

B195 COMBUSTION AIR ADJUSTMENT

This model is equipped with an air adjustment screw on the combustion air blower inlet. For natural gas the opening is factory set at about 2.12" diagonal dimension, for propane gas the opening is 1.875" diagonal dimension, which should be the proper setting for most installations. However, field conditions including unusual gas characteristics may create a need for adjustment to achieve optimum performance. When the combustion air setting is proper, there will be some lifting of the flames on some areas of the burner tile under cold start conditions. After about five minutes of operation, the flames should settle down and blue tips should become visible on some areas and orange glow on other sections of the burner tile. Lifting of flames beyond five minutes would indicate too much combustion air. The adjustment screw should be turned clockwise to reduce the combustion air supply until the lifting settles down. If the blue tips disappear and the entire burner surface becomes radiant white, it indicates that there is not enough combustion air and the adjustment screw should be turned counterclockwise to increase the combustion air opening until the blue tips and orange glow become visible again.

The optimum excess air will result in CO2 levels between 8 and 8.5% for natural gas and 9.2 to 9.7% for propane. If a flue gas analyzing equipment is available, the opening can be adjusted to achieve this CO2 level. Or, if an inclined manometer is available, pressure measured at the combustion air switch pressure tap, can be set at -0.35" W.C. for natural gas and -0.60" W.C. for propane by means of the adjustment screw. Pressure at this level will result in the proper CO2 levels mentioned above.

Again, the factory setting will be adequate for most field conditions and adjustment will not normally be required.

CAUTION: A dusty kitchen environment combined with greasy laden air will clog the combustion air blower wheel and cause premature failure of the heater. Combustion air must not be contaminated by corrosive chemical fumes which can severely damage the heater.

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