Camus Hydronics MFH060 - 3 Provide Air for Combustion and Ventilation

3
Table 2: Appliance Dimensions, (inches)
B' Dia. Venting E' Dia.
Model 'W'
Water
Connection
Gas
Connection
Outdoor
Sidewall or
Condensing
Standard
Air Inlet
MFNH060 18 3/4 1 1/2 1/2
3
3
3
3
MFNH100 18 3/4 1 1/2 1/2
3
3
4
3
MFNH150 18 3/4 1 1/2 1/2
3
3
4
3
MFNH200 18 3/4 1 1/2 3/4
4
4
5
4
MFNH250 25 1 1/2 3/4
4
4
5
4
MFNH300 25 1 1/2 3/4
5
5
6
5
MFNH400 31 1/2 2 1
5
5
6
5
MFNH500 31 1/2 2 1
6
6
7
6
MFNH600 36 1/2 2 1
6
6
7
6
3 PROVIDE AIR FOR COMBUSTION AND VENTILATION
Provisions for combustion and ventilation air must be in accordance with:
• Section 5.3. Air for combustion and Ventilation, of the latest or current as amended National Fuel
Gas Code, ANSI Z223.1, or;
• Sections 7.2, 7.3 or 7.4 of CAN/CGA B149 Installation Codes, and;
• Applicable provisions of the local building codes.
The operation of exhaust fans, compressors, air handling units etc. can rob air from the room, creating a
negative pressure condition leading to reversal of the natural draft action of the venting system. Under
these circumstances an engineered air supply is necessary.
If the heater is to be installed near a corrosive or potentially corrosive air supply, the heater must be
isolated from it and outside air should be supplied as per code.
Potentially corrosive atmospheres will result from exposure to permanent wave solution, chlorinated
waxes and cleaners, chlorine, water softening chemicals, carbon tetrachloride, halogen based
refrigerants, Freon cleaning solvents, hydrochloric acid, cements and glues, masonry washing materials,
antistatic fabric softeners, dry cleaning solvents, degreasing liquids, printing inks, paint removers, etc.