Raypak 017401 Digital ASME B-R336A-EN-X #50 Pool Heater, Natural Gas, 332,500 BTU, Cupronickel, Bronze Headers

The Raypak Digital ASME 336A is built for commercial pools and spas and other installations where an ASME-certified heater is required. The heat exchanger is ASME-certified, HLW-stamped and National Board registered, 100 PSIG maximum allowable working pressure, with bronze headers, cupronickel fin tubes and steel tube sheets. Raypak lists the Digital ASME series at 82% thermal efficiency.

Other versions: propane is Raypak item 017413; 2,000 to 6,000 ft is item 017405 and 6,000 to 9,000 ft is item 017409; the same heater with copper tubes is item 017373.

• 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.
• Pump flow between 35 and 100 GPM. Above 100 GPM Raypak calls for an external bypass valve.
• This is an atmospheric heater, not a Low NOx model. Raypak's Low NOx ASME heaters are the 207A to 407A series.
• 75 PSI pressure relief valve included, shipped loose in the accessory carton; the header has a 3/4 in. NPT connection for it.
• ProTek Shield sacrificial assembly with its adapter, packed in the accessory carton for installation at the inlet connection of the bronze header.
• Natural gas supply pressure 6 in. WC minimum, 10.5 in. WC maximum. Gas connection 3/4 in. NPT.
• Electronic intermittent ignition lights the pilot and main burners automatically on a call for heat.
• Digital control with LCD display: pool and spa modes, setpoint adjustable from 50 to 104 degrees F (maximum can be raised to 107), status and diagnostic messages, PIN control lockout. Remote-ready for two-wire or three-wire control systems.
• Unitherm Governor (thermostatic mixing valve) and automatic bypass valve built into the inlet/outlet header.
• Power 120 or 240 VAC, single phase, 60 Hz. Draws 4 A at 120 V or 2 A at 240 V. Factory wired for 240 VAC. Not for 208 VAC.
• Water connections 2 in. slip, with CPVC unions. PVC pipe can be glued directly to the unions.
• 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, ProTek Shield adapter and assembly.
• Raypak limited warranty for ASME pool and spa heaters: one year parts and labor.

Good to know:

• Raypak rates the input for elevations up to 2,000 ft and reduces it 4% for each 1,000 ft above sea level beyond that, so order the version built for your elevation.
• Some jurisdictions require a flow switch on ASME installations. Raypak offers kit 015889F (flange connection) or 015890F (NPT connection) for that.
• On ASME units a high-limit trip is a manual-reset fault, cleared with the MODE button.
• The ProTek Shield is a wear item and is not covered by the warranty. 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.
• To move the water connections to the other side on an ASME model, Raypak says to call the factory representative for instructions.
• 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.