Proper operation of the water heater requires air for combustion and ventilation. Provisions for combustion and ventilation air must comply with referenced codes and standards.

Combustion and Ventilation Air (Indoor Water Heater Only)

Air openings minimum 1 in2 (6.5 cm2) per 1000 Btuh of total input

Min. 3” (7.6 cm)

DANGER: OUTDOOR water heaters must not be installed indoors or in a confined space. Install outdoor water heaters outdoors only.

NOTICE: If the water heater is installed in an unconfined space within a building of conventional frame, masonry or metal construction, infiltration air is normally adequate for proper combustion and ventilation. If the water heater is installed in a confined space, provisions for combustion and ventilation air must be made.

A confined space is one having a volume of less than 50 cubic feet (1.4 m3) per 1000 Btuh (0.3 kw) of the aggregate input of all appliances within that space.

The air must be supplied through two permanent openings of equal area. One is to be located within 12” (30 cm) above the floor and the other is to be located within 12” (30 cm) below the ceiling.

The minimum net free area of each opening must not be less than one square inch (6.5 cm2) per 1000 Btuh (0.3 kw) of the total input rating of all the appliances in the enclosure (but not less than 100 square inches [650 cm2]) if each opening communicates with other unconfined areas inside the building. The above requirements shall be used unless: national, provincial, or local codes govern the requirement for these air openings.

Buildings of unusually tight construction shall have the combustion and ventilation air supplied from outdoors, or a freely ventilated attic or crawl space.

If air is supplied from outdoors, directly or through vertical ducts, there must be two openings located as specified above and each must have a minimum net free area of not less than one square inch

(6.5 cm2) per 4000 Btuh (1.2 kw) of the total input rating of all the appliances in the enclosure.

If horizontal ducts are used to communicate with the outdoors, each opening must have a minimum net free area of not less than one square inch (6.5 cm2) per 2000 Btuh (0.6 kw) of the total input rating of all the appliances in the enclosure. If ducts are used, the minimum dimensions of rectangular air ducts shall not be less than 3” (7.6 cm).

NOTICE: If the duct openings which supply combustion and ventilation air are to be covered with a protective screen or grille, the net free area (openings in the material) of the covering material must be used in determining the size of the openings. Protective screening for the openings MUST NOT be smaller than 1/4” (0.64 cm) mesh to prevent clogging by lint or other debris.

NOTICE: The water heater should not be installed near an air supply containing halogenated hydrocarbons.

Corrosive Atmospheres

The air in beauty shops, dry cleaning establishments, photo processing labs, and storage areas for liquid and powdered bleaches or swimming pool chemicals often contains such halogenated hydrocarbons.

An air supply containing halogenated hydrocarbons may be safe to breathe, but when it passes through a gas flame, corrosive elements are released that will shorten the life of any gas burning appliance.

Propellants from common spray cans or gas leaks from A/C and refrigeration equipment are highly corrosive after passing through a flame.

The water heater warranty is voided when failure of the heater is due to operation in a corrosive atmosphere.

Inspect Shipment

Inspect the water heater for possible damage. Check the markings on the rating plate of the water heater to be certain the type of gas supplied corresponds to the water heater requirements. Verify all included parts are present (see below).

 

 

Certificate of

Use & Care Manual

 

 

Residential Gas

 

 

Warranty

Tankless Water Heaters

 

 

Limited

 

 

PRIORITY

 

 

 

°F

Wood Screw x 5pcs.

 

 

 

!

 

 

 

!

 

POWER

 

!

 

 

 

 

ON/OFF

 

 

Drain Tubing

 

Warranty

 

Remote Control

Washer x 4 pcs.

 

(Indoor models only)

 

 

Assembly Kit

 

Use & Care Manual

 

 

 

Manual Appliance

9

Gas Shut-off Valve

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Rheem RUTG2-53(PVN)(PVP)(XN)(XP) warranty Combustion and Ventilation Air Indoor Water Heater Only, Corrosive Atmospheres
Page 8 Page 10

RMTG2-53(PVN)(PVP)(XN)(XP), RTG2-53(PVN)(PVP)(XN)(XP), RUTG2-53(PVN)(PVP)(XN)(XP), PTG53-(PVN)(PVP)(XN)(XP) specifications

Rheem PTG53-(PVN)(PVP)(XN)(XP), RUTG2-53(PVN)(PVP)(XN)(XP), RTG2-53(PVN)(PVP)(XN)(XP), and RMTG2-53(PVN)(PVP)(XN)(XP) are an impressive lineup of tankless water heaters that exemplify efficiency, technology, and convenience. These models represent Rheem's commitment to innovation in water heating solutions, appealing to both residential and commercial users.

At the core of these models is their ability to deliver continuous hot water on demand, which eliminates the need for large storage tanks. The compact design allows for flexible installation options, saving valuable space and making them suitable for varied settings, including tight spaces. The units are designed to provide an endless supply of hot water, making them ideal for families with high hot water needs.

Advanced heating technology is another hallmark of the Rheem PTG53 and its counterparts. These models typically feature high-efficiency condensing design, which captures and reuses exhaust heat to enhance overall efficiency. This means users can enjoy lower energy bills while also contributing to a reduced environmental footprint.

The Rheem Tankless Water Heaters come equipped with smart functionalities, including digital displays for easy temperature settings and monitoring. Some models are compatible with Wi-Fi connectivity, enabling users to control and monitor their water heating systems remotely through a smartphone app. This feature adds an extra layer of convenience, particularly for tech-savvy homeowners seeking seamless integration into their smart home ecosystems.

Safety features are also well-considered in these models, with automatic shut-off mechanisms and overheating protection ensuring safe operation. Additionally, they boast impressive flow rates, providing sufficient hot water for multiple fixtures simultaneously, thus meeting the demands of larger households or commercial establishments.

Finally, Rheem stands behind its products with robust warranties, showcasing confidence in their durability. The PTG53, RUTG2, RTG2, and RMTG2 models are constructed to offer longevity and reliability, ensuring peace of mind for users.

In summary, Rheem's PTG53-(PVN)(PVP)(XN)(XP), RUTG2-53(PVN)(PVP)(XN)(XP), RTG2-53(PVN)(PVP)(XN)(XP), and RMTG2-53(PVN)(PVP)(XN)(XP) represent the pinnacle of tankless water heating technology. With their efficient, space-saving design, advanced features, and emphasis on safety, these units are well suited for modern living, providing endless hot water and comfort to users.
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