Raypak 300, 850 operating instructions Combustion and Ventilation Air, Indoor Units

24”

SERVICE

CLEARANCE

24”

SERVICE

CLEARANCE

Heater	Min. Clearances	Recommended
	from Combustible	Service
Side	Surfaces	Clearances
Rear	24”	24”
Right Side	0”	0”
Left Side	0”	0”
Top	Unobstructed	24”
Front	Open	24”
Vent	12”	12”
Termination

Table E: Clearances — Outdoor Installations

Combustion and Ventilation Air

NOTE: Use of this boiler in construction areas where fine particulate matter, such as concrete or dry-wall dust, is present may result in damage to the boiler that is not covered by the warranty. If operated in a construction environment, a clean source of combustion air must be provided directly to the boiler.

24”

SERVICE

CLEARANCE

Venting not shown for clarity. Heater must be vented per

instructions in this manual

Fig. 4: Minimum Clearances from Combustible Surfaces — Indoor and Outdoor Installations

Indoor Units

This heater must be supplied with sufficient quantities of non-contaminated air to support proper combustion and equipment ventilation. Combustion air can be sup- plied via conventional means where combustion air is drawn from the area immediately surrounding the heater, or via direct vent, where combustion air is drawn directly from outside. All installations must com- ply with the requirements of the NFGC (U.S.) and B149 (Canada), and all local codes.

CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the boiler and void the warranty. (See the Appendix.)

NOTE: It is recommended that the intake vent be insulated in cold climates to minimize sweating.

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