Raypak 300, 850 operating instructions Outdoor Installation, Freeze Protection

This type of installation can cause non-warrantable problems with components and poor operation of the boiler due to the recirculation of flue products. Multi- ple vent caps installed in the same horizontal plane must have a 4 ft clearance from the side of one vent cap to the side of the adjacent vent cap(s).

Combustion air supplied from outdoors must be free of particulate and chemical contaminants. To avoid a blocked flue condition, keep the vent cap clear of snow, ice, leaves, debris, etc.

WARNING: No substitutions of flue pipe or vent cap material are allowed. Such substitutions would jeopardize the safety and health of inhabitants.

The stainless steel flue direct vent cap must be fur- nished by the boiler manufacturer in accordance with its listing (sales order option D-15).

Outdoor Installation

Outdoor models must be vented with listed vent mate- rial per the following instructions and installed with the optional factory-supplied outdoor vent kit. A special vent terminal is provided in accordance with CSA requirements. These must be installed as illustrated in Fig. 25.

Care must be taken when locating the unit outdoors, because the flue gases discharged from the vent cap can condense as they leave the cap. Improper location can result in damage to adjacent structures or building finish. For maximum efficiency and safety, the follow- ing precautions must be observed:

1.Outdoor models must be installed outdoors and must use the outdoor vent cap available from the manufacturer (sales order option D-11).

2.Periodically check venting system. The unit’s venting areas must never be obstructed in any way and minimum clearances must be observed to prevent restriction of combustion and ventilation air. Keep area clear and free of combustible and flammable materials.

3.Do not locate adjacent to any window, door, walk- way, or gravity air intake. The vent must be located a minimum of 4 ft horizontally from such areas.

4.Install above grade level and above normal snow levels.

5.Vent terminal must be at least 3 ft above any forced air inlet located within 10 ft.

6.Adjacent brick or masonry surfaces must be pro- tected with a rust-resistant sheet metal plate.

Freeze Protection

NOTE: The vent cap must be furnished by the boiler manufacturer in accordance with its listing (sales order option D-11).

NOTE: Condensate can freeze on the vent terminal. Frozen condensate on the vent terminal can result in a blocked flue condition.

		Fig. 25: Outdoor Venting
Model	Size	Approved	Approved SS
		Plastic
No.	(in.)	Terminals	Terminals
300	4	PVC Tee,	FasNSeal FSTT4,
		Sch 40*	Z-Vent 2SVSTTF04
500
850	6	PVC Tee,	FasNSeal FSTT6, Heat
		Sch 40*	Fab 9690TEE

*Must be ULC-S636 materials in Canada.

The Raypak electronic temperature control includes a freeze protection feature. In the event the temperature drops below 40°F at any of the temperature sensors, the pump is turned on and will remain on until the tem- peratures at all sensors rise to 45°F.

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