10.To restart system, follow lighting instructions in the Operation section.

11.Check to see that the high limit control is set above the design temperature requirements of the system.

For multiple zones: Check to make sure the flow is adjusted as required in each zone.

12.Check that the heater is cycled with the thermo- stat. Raise to the highest setting and verify that the heater goes through the normal start-up cycle. Re- duce to the lowest setting and verify that the heater goes off.

13.Observe several operating cycles for proper oper- ation.

14.Set the room thermostat or tankstat to desired temperature.

15.Review all instructions shipped with this heater with owner or maintenance person, return to enve- lope and give to owner or place the instructions inside front panel on heater.

OPERATION

Lighting Instructions

1.Before lighting, make sure you have read all of the safety information in this manual.

2.Set the thermostat to the lowest setting.

3.Turn off all electrical power to the appliance.

4.This appliance is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

5.Remove upper front panel.

6.Turn on main manual gas valve.

7.Wait 5 minutes to clear out any gas. Then smell for gas, especially near the floor. If you then smell gas, STOP! Follow the steps in the safety informa- tion on the front cover of this manual. If you do not smell gas, go to next step.

8.Turn on all electrical power to the appliance.

9.Set thermostat to desired setting. The appliance will operate. The igniter will glow after the pre- purge time delay (15 seconds). After igniter reaches temperature (45 seconds) the main valve will open. System will try for ignition three times. If flame is not sensed, lockout will commence.

10.If the appliance will not operate, follow the instruc- tions “To Turn Off Gas To Appliance,” and call your service technician or gas supplier.

11.Replace access panel.

12.If heater fails to start, verify the following:

a.There are no loose connections or that the service switch is off.

b.High temperature limit switch is set above wa- ter temperature.

c.Thermostat is set above room temperature.

d.Gas is on at the meter and the heater.

e.Incoming gas pressure to the gas valve is NOT less than 5.0 in. WC for natural gas, 11.0 in. WC for propane gas.

To Turn Off Gas To Appliance

1.Set the thermostat to lowest setting.

2.Turn off all electrical power to the appliance if serv- ice is to be performed.

3.Remove upper front panels.

4.Turn off main manual gas valve.

5.Replace access panel.

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Raypak 902B, 302B manual Operation, Lighting Instructions, To Turn Off Gas To Appliance
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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.
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