2.The water heater(s) shall be equipped with a fixed 5-minute energy-saving pump control relay, mounted and wired, which automatically shuts off the water heater pump at a set period after water heater shut-down to avoid standby losses associated with constant pump operation.

G.Firing Mode

1.For model 399B, provide on/off control of the gas input to the water heater (stage fire optional).

2.For models 499B-899B, provide two-stage firing control of the gas input to the water heater.

H.Water Heater Diagnostics

1.Provide external LED panel displaying the following water heater status/faults:

a.Power on – Green

b.Call for heat – Amber

c.Burner on – Blue

d.Safety fault – Red

2.A Central Point Wiring board with diagnostic LED’s indicating the status of each relay.

3.Provide ignition module indicating the following flash codes by LED signal:

a.1 flash – low air pressure

b.2 flashes – flame in the combustion chamber w/o CFH

c.3 flashes – ignition lock-out (flame failure)

d.4 flashes – low hot surface igniter current

e.5 flashes – low 24VAC

f.6 flashes – internal fault

I.Combustion Chamber: The lightweight, high temperature, multi-piece, interlocking ceramic fiber combustion chamber liner shall be sealed to reduce standby radiation losses, reducing jacket losses and increasing unit efficiency.

J.Venting

1.When routed vertically, the water heater’s flue material and size shall be in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 latest edition (Category I).

2.When routed horizontally, the water heater(s) flue material and size shall meet or exceed the requirements as specified for Category III in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 latest edition.

3.The water heater(s) shall be ducted combustion air ready.

K.Cabinet

1.The corrosion-resistant galvanized steel jackets shall be finished with a baked-on epoxy powder coat which is suitable for outdoor installation, applied prior to assembly for complete coverage, and shall incorporate louvers in the outer panels to divert air past heated surfaces.

2.The water heater(s), if located on a combustible floor, shall not require a separate combustible floor base.

3.The water heater(s) shall have the option of venting the flue products either through the top or the back of the unit.

4.Combustion air intake shall be on the left side of the cabinet, right side optional.

L.Water Heater Operating Controls

1.The water heaters(s) shall feature an optional two-stage digital controller, mounted and wired.

2.Water temperature sensors shall be shipped loose for field installation by installing contractor.

Specifier Note: The remaining items in this section are options. Delete those that are not being specified. IMPORTANT: The Cold Water Start and Cold Water Run Systems cannot be used on the same water heater.

M.Water Heater Pump - Refer to Equipment Schedule

N.SureRack™ Water Heater Stacking Kit

1.The water heaters shall be stacked directly one on top of the other, without offset, to minimize footprint.

O.Cold Water Start System

1.The water heater(s) shall be configured with a cold water start automatic proportional bypass system that ensures the water heater will experience inlet temperatures in excess of 105ºF in

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Raypak 899B dimensions
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899B specifications

The Raypak 899B is a highly efficient and reliable commercial boiler that has gained popularity in various heating applications. This unit is recognized for its robust construction, advanced technologies, and user-friendly features, making it a preferred choice among heating professionals.

One of the main features of the Raypak 899B is its impressive thermal efficiency, which can exceed 90%. This remarkable efficiency translates to lower operating costs and reduced energy consumption, making it an environmentally friendly option for both residential and commercial settings. The boiler is designed to utilize natural gas as fuel, ensuring a cleaner burn and minimal emissions, which is beneficial for users looking to adhere to strict environmental regulations.

The Raypak 899B is equipped with a unique copper fin-tube heat exchanger that enhances heat transfer and maximizes efficiency. This feature allows for quicker heating and improved performance, even in high-demand situations. The heat exchanger is also resistant to corrosion, which contributes to the boiler's longevity and requires less maintenance over time.

User-friendly control systems are another highlight of the Raypak 899B. The boiler incorporates advanced control technologies, allowing users to monitor and adjust settings easily from a central control panel. This includes precise temperature control and diagnostics, which helps ensure optimal operation and simplifies troubleshooting.

Additionally, the Raypak 899B offers flexibility when it comes to installation. With options for direct venting and a compact design, it can fit into various spaces, making it an ideal choice for both new constructions and retrofits. The unit is also designed for both indoor and outdoor installations, providing versatility depending on the project's requirements.

Safety features are paramount in the design of the Raypak 899B. It includes built-in safety controls that help prevent overheating and other potential hazards, ensuring peace of mind for users. Furthermore, the unit complies with various industry standards, highlighting its commitment to safety and quality.

In summary, the Raypak 899B boiler stands out due to its high efficiency, advanced heat exchanger technology, user-friendly controls, installation flexibility, and safety features. These characteristics make it a reliable choice for efficient heating solutions in both commercial and residential applications.
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