Raypak P-R185BL to P-R405BL 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.
Fig # 9037.2
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CAUTION: Combustion air must not be contaminated
by corrosive chemical fumes which can damage the
heater and void the warranty.