Raypak 5042004 Combustion and Ventilation Air, Heater, Min. Clearance, Minimum, from Combustible

Venting not shown for clarity. Heater must be vented per instruc-

tions in this manual

Fig. 6: Minimum Clearances from Combustible Surfaces – Indoor and Outdoor Installations

serviced in its installed location without movement or removal of the heater.

Service clearances less than the minimum may require removal of the heater to service either the heat exchanger or the burner components. In either case, the heater must be installed in a manner that will enable the heater to be serviced without removing any structure around the heater.

Outdoor Installations

These heaters are design-certified for outdoor installa- tion. Heaters must not be installed under an overhang unless they are in accordance with local installation

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codes and the requirments of the gas supplier. Three sides must be open in the area under the overhang. Roof water drainage must be diverted away from heaters installed under overhangs.

The combustion air intake terminal MUST be used for outdoor installations. The elbow is shipped loose to be installed on the rear of the heater at the job site.

Heater	Min. Clearance	Minimum
	from Combustible	Service
Side	Surfaces	Clearance
Rear	12”	24”
Front	Open	24”
Right Side	1”	1”
Left Side	1”	1”
Top	Unobstructed	10”
Vent	12”	12”
Termination

Table D: Clearances – Outdoor Installations

Combustion and Ventilation Air

NOTE: Use of this heater in construction areas where fine particulate matter, such as concrete or dry-wall dust, is present may result in damage to the heater 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 heater.

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 heater and void the warranty. (See the Appendix.)

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