Raypak 017402 Digital ASME B-R406A-EN-X #50 Pool Heater, Natural Gas, 399,000 BTU, Cupronickel, Bronze Headers

Use: commercial pools and spas, and other installations where an ASME-certified heater is required. Raypak lists the propane version as item 017414, item 017406 for 2,000 to 6,000 ft and item 017410 for 6,000 to 9,000 ft. The same heater with copper tubes is Raypak item 017374.

• Outdoor installation as shipped, using the stackless top packed with the heater. Indoor installation needs Raypak indoor stack kit 009841 and a vent to the outside.
• Pump flow between 40 and 100 GPM. Above 100 GPM Raypak calls for an external bypass valve.
• Atmospheric heater, not a Low NOx model. Raypak's Low NOx ASME heaters are the 207A to 407A series.
• Raypak lists the Digital ASME series at 82% thermal efficiency.
• ASME heat exchanger, HLW-stamped and National Board registered, 100 PSIG maximum allowable working pressure. Bronze headers, cupronickel fin tubes, steel tube sheets.
• 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 29 in. wide, 28 in. deep, 38 in. high; 40 in. to the top of the outdoor stackless top. Flue diameter 9 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.
• Raypak's pipe sizing table allows 3/4 in. pipe on the 406A only for the last 5 ft at the gas valve. Size the supply line from the table in the manual.
• 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.