Raypak C-R185B User Manual Page 16

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16
SPECIFICATIONS AND DIMENSIONS
*Electrical Connection On Left Side is 19-1/8".
a. All Air From Inside The Building:
Each opening shall have a minimum net free square
inches as noted:
Model Square Inches Model Square Inches
185 181 335 333
265 264 405 399
b. All Air From Outdoors:
When air is supplied directly from outside of building,
each opening shall have a minimum net free square
inches as noted:
Model Square Inches
185 46
265 66
335 84
405 100
COMBUSTION AND VENTILATION AIR
(Indoor Units Only)
The heater must have both combustion and ventilation air.
Minimum requirements for net free air supply openings,
one opening that is 12 inches from the ceiling for
ventilation and one opening that is 12 inches from the floor
for combustion air as outlined in the latest edition of the
National Fuel Gas Code, ANSI Z2231(Canada-CAN/
CGA-B149.1 and B149.2) and any local codes that may
have jurisdiction.
*Designation for Propane is "EP", Natural gas is "EN". Prefix "C" is for Cast Iron (ASME) Headers; "P" is for Plastic (Polymer)
Headers. Atmospheric heaters: reduce input 4% for each 1000 ft. above sea level when installed above 2000 ft. elevation.
Low NOx heaters: for elevations above 5,000 feet consult factory. For Canada, no de-rating is required for elevations up to
4500 feet. Manufactured under Patent No. 3,623,458. Note: Plastic (Polymer) headers cannot be used for ASME installations.
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B581R181"4/1-81"6"8/5-26"61/1-21"4/3"219127121
B562R462"8/3-22"7"8/7-26"8/1-11"4/3"241259151
B533R433"4/3-52"8"4/3-36"4/3-01"4/3"243251271
B504R993"4/1-92"9"8/3-56"2/1-21"4/3"235243202
CAUTION: Combustion air must not be contaminated
by corrosive chemical fumes which can damage the
heater and void the warranty.
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