In addition, the heater shall be installed such that the gas ignition system components are protected from water (dripping, spraying, rain, etc.) during appliance operation or service (circulator replacement, control replacement, etc.).

Clearances

Indoor Installations

Heater

Minimum Clearance

Recommended

from Combustible

Service

Side

Surfaces

Clearance

 

 

 

 

Floor*

0”

0”

 

 

 

Rear

1”

6”

 

 

 

Water Side

12”

24”

 

 

 

Other Side

1”

24”

 

 

 

Top

1”

6”

 

 

 

Front

Open

24”

 

 

 

Vent

2”

2”

 

 

 

* DO NOT install on carpeting.

Table E: Clearances – Indoor Installations

TOP VIEW

FRONT VIEW

Venting not shown for clarity. Heater must be vented

per instructions in this manual

Fig. 6: Minimum Clearances from Combustible

Surfaces – Indoor Installations

When installed according to the listed minimum clear- ances from combustible construction, these heaters can still be serviced without removing permanent structural construction around the heater. However, for ease of servicing, we recommend a clearance of at least 24 in. in front, and at least 12 in. on the water connection side. This will allow the heater to be serv- iced in its installed location without movement or removal of the heater.

Service clearances less than the minimums may require removal of the heater to service either the heat exchanger or the burner tray. 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 that is less than 3 ft from the top of the heater. Three sides must be open in the area under the overhang. Roof water drainage must be diverted away from heaters installed under overhangs.

Heater

Min. Clearance

Recommended

from Combustible

Service

Side

Surfaces

Clearance

 

 

 

 

Front

Open

24”

 

 

 

Rear

12”

24”

 

 

 

Water Side

36”

36”

 

 

 

Other Side

36”

36”

 

 

 

Top

Unobstructed

Unobstructed

 

 

 

Vent

N/A

N/A

 

 

 

Table F: Clearances – Outdoor Installations

These clearances are required when the outdoor vent cap is used. If installing the heater outdoors with a vent stack, the indoor clearances may be utilized.

The combustion air intake hood MUST be used for outdoor installations. The hood is shipped loose and installed on the side of the heater over the filter box at the jobsite.

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Raypak 902B, 302B manual Clearances, Indoor Installations, Outdoor Installations

302B, 902B specifications

Raypak is a prominent name in the heating industry, particularly known for its advanced technology and robust design in residential and commercial heating solutions. Two of their notable models, the Raypak 302B and 402B, exemplify innovation and efficiency in hydronic heating systems, designed to meet diverse needs while ensuring optimal performance.

The Raypak 302B and 402B are high-efficiency boilers that utilize gas-fueled systems. The 302B model has a heating capacity of 302,000 BTU/h, while the 402B boasts a maximum capacity of 402,000 BTU/h. This range of heating output makes these models suitable for a variety of applications, from residential heating needs to larger commercial spaces that require a reliable heat source.

One of the standout features of the Raypak 302B and 402B is their use of fire-tube heat exchanger technology. This design promotes efficient heat transfer and allows for lower emissions, thus minimizing the environmental impact. The fire-tube design also contributes to a longer lifespan and reduced maintenance costs, making these boilers a cost-effective solution over time.

Equipped with advanced control systems, the Raypak 302B and 402B ensure precise temperature regulation and improved energy usage. The digital display provides real-time feedback and diagnostics, enhancing user experience and simplifying troubleshooting. These models are also compatible with various building management systems, providing users with versatility in integration to optimize building performance.

In addition to their technological advancements, these boilers are designed with user safety and convenience in mind. They include features such as built-in safety controls, easy access for service and maintenance, and a compact footprint to fit into tight spaces. Their robust construction ensures durability, which is crucial for systems that operate under high demand.

Moreover, both models have been engineered to succeed in various climates, making them reliable choices for users in diverse geographical locations. With their energy-efficient operation, reliable performance, and advanced features, the Raypak 302B and 402B embody quality and innovation in the heating market, ensuring comfortable environments while lowering energy costs and environmental footprints.