The temperature of the water in the heater can be reg- ulated by using the temperature controller. To comply with safety regulations, the temperature controller is set at the lowest setting when shipped from the facto- ry.

To adjust the water temperature, insert a small straight screwdriver into the adjustment screw on the front of temperature controller and turn the wheel to the desired setting (See Fig. 4.).

Equipment Base

The heater should be mounted on a level, structurally sound surface. The heater is approved for installation on a combustible surface but must NEVER be installed on carpeting. Gas-fueled equipment installed in enclosed parking garages must be located at least 18 in. above the floor.

Stacking

Hi Delta units can be stacked two units high with an optional stacking rack. A stacking kit is available from Raypak for this type of installation.

CAUTION: The heaters should be located in an area where water leakage will not result in damage to the area adjacent to the appliances or to the structure. When such locations cannot be avoided, it is recommended that a suitable catch pan, adequately drained, be installed under the appliance. The pan must not restrict air flow.

Fig. 4: Temperature Controller

INSTALLATIONCAUTION: Hotter water increases the risk of scalding! There is a hot water scald potential if the

thermostat is set too high.

INSTALLATION

Installation Codes

Installations must follow these codes:

Local, state, provincial, and national codes, laws, regulations and ordinances

National Fuel Gas Code, ANSI Z223.1/NFPA 54 – latest edition (NFGC)

National Electrical Code, ANSI/NFPA 70 - latest edition (NEC)

Standard for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1, when required (CSD-1)

For Canada only: CAN/CSA B149 Installation Code (B149) and CSA C22.1 C.E.C. Part 1 (C22.1)

REQUIRES OPTIONAL VENT TEE.

REQUIRES OPTIONAL VENT TEE IF VENTED OUT BACK OF HEATER.

Fig. 5: Typical Stacked Installation

9

Page 9
Image 9
Raypak 302B, 902B manual Equipment Base, Stacking, Installation Codes

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.