Raypak 017373 Digital ASME B-R336A-EN-C #50 Pool Heater, Natural Gas, 332,500 BTU, Copper Heat Exchanger, Bronze Headers

The Raypak Digital ASME 336A is the code-stamped version of the Digital atmospheric gas heater. Bronze headers and an ASME-certified copper fin-tube heat exchanger take the place of the polymer headers used on the residential model, for pools and spas where an ASME heater is required, typically commercial sites.

Related items

• The propane ASME 336A is a different item number (017385).
• Raypak also lists item 017377 with the #51 orifice and item 017381 with the #52 orifice; on copper models Raypak gives #51 for 2,000 to 6,000 ft and #52 for 6,000 to 9,000 ft.
• The cupronickel ASME 336A is a different item number (017401).

Installation

• Outdoor installation as shipped, using the stackless top packed with the heater.
• Indoor installation needs Raypak indoor stack kit 009840 and a vent to the outside, or the D-2 power vent kit (010745 for 120 V, 009833 for 240 V).
• Pump flow between 35 and 100 GPM. Above 100 GPM Raypak calls for an external bypass valve.
• Some jurisdictions require a flow switch on ASME installations. Raypak offers kit 015889F (flange connection) or 015890F (NPT connection) for that.

Specifications

• Raypak lists the Digital ASME series at 82% thermal efficiency.
• Natural gas supply pressure 6 in. WC minimum, 10.5 in. WC maximum. Gas connection 3/4 in. NPT.
• ASME heat exchanger: bronze headers and copper fin tubes, HLW-stamped, 100 PSIG maximum allowable working pressure, registered with the National Board.
• A 75 PSI pressure relief valve is included, shipped loose for the 3/4 in. NPT port in the header.
• A ProTek Shield sacrificial assembly and its adapter are included, shipped loose for installation at the inlet connection. It protects the heat exchanger from galvanic corrosion.
• Electronic intermittent ignition lights the pilot and main burners automatically on a call for heat.
• Digital control with LCD display: pool and spa modes, adjustable setpoint, status and diagnostic messages. Remote-ready for two-wire or three-wire control systems.
• Unitherm Governor (thermostatic mixing valve) and a built-in automatic bypass valve in the inlet/outlet header.
• Power 120 or 240 VAC, single phase, 60 Hz, through a dual-voltage transformer; Raypak states the heater is factory-wired for 240 VAC. Draws 4 A at 120 V or 2 A at 240 V. Not for 208 VAC.
• Water connections 2 in. slip, with CPVC unions. Right-hand as shipped; Raypak lists left-hand as an optional field change.
• Cabinet 26 in. wide, 28 in. deep, 38 in. high; 40 in. to the top of the outdoor stackless top. Flue diameter 8 in.
• In the carton: outdoor stackless (pagoda) top, two 2 in. CPVC union halves with O-rings, plastic finish flange for the gas line, bonding lug, pressure relief valve, and the ProTek Shield adapter with ProTek Shield, O-ring and wing nut.
• Raypak limited warranty for ASME models: one year parts and labor.

Good to know

• Raypak reduces the input rating 4% for each 1,000 ft above sea level beyond 2,000 ft, so order the version built for your elevation.
• The ProTek Shield is a wear item. Raypak says to replace it when its weight has dropped to about 40% of the original.
• Salt chlorinators and chemical feeders must be plumbed downstream of the heater. Raypak's water chemistry table allows up to 4,500 ppm salt.
• This is the atmospheric ASME model. Raypak's Low NOx ASME heaters are the separate 207A to 407A models.
• Gas, venting and electrical work must be done by a qualified installer or service agency and meet local codes. Raypak's warranty applies to heaters installed by a licensed service provider.