Raypak 503-2003 manual Controls, Outdoor Installation, Freeze Protection

SECTION C: Installation

Outdoor Installation

Outdoor models are self-venting when installed with the optional factory-supplied outdoor vent kit. Addi- tional vent materials are required as outlined in the Outdoor Vent Kit instructions. A special vent cap and air intake elbow are offered in accordance with CSA requirements. These must be installed directly on the vent pipe as illustrated in Fig. 26.

Care must be taken when locating the heater 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. They must use the outdoor vent cap and air intake elbow available from the manufacturer (sales order op- tion D-11).

2.Periodically check the venting system. The heater’s venting areas must never be obstructed in any way and minimum clearances must be ob- served to prevent restriction of combustion and ventilation air. Keep area clear and free of com- bustible 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.

NOTICE: Condensate can freeze on the vent cap. Fro- zen condensate on the vent cap can result in a blocked flue condition.

NOTICE: The vent cap and air intake hood must be furnished by the heater manufacturer in accordance with its listing (sales order option D-11).

Fig. 26: Outdoor Venting

Freeze Protection

When installing this heater in an outdoor location that is susceptible to freezing, sales option B-22 should be installed to energize the heater pump at a present out- door air temperature and circulate water to reduce the possibility of freezing and damage to the heat ex- changer or headers.

Controls

WARNING: Installation, adjustment and service of heater controls, including timing of various operating functions, must be performed by a qualified installer, service agency or the gas supplier. Failure to do so may result in control damage, heater malfunction, property damage, personal injury, or death.

WARNING: Turn off the power to the heater before installation, adjustment or service of any heater con- trols. Failure to do so may result in heater malfunction, property damage, personal injury, or death.

CAUTION: This appliance has provisions to be con- nected to more than one supply source. To reduce the risk of electric shock, disconnect all such connections before servicing.

CAUTION: Risk of electric shock: More than one disconnect switch may be required to de-energize the equipment before servicing.

28