Raypak 336A, 406A, 206A, 407A, 337A, 207A Electrical - Standing Pilot Millivolt Pool Or Spa Heater

ELECTRICAL - STANDING PILOT MILLIVOLT

POOL OR SPA HEATER

ELECTRICAL CHECK WITH MILLIVOLT GAS VALVE

CAUTION: For qualified service personnel only.

1.Filter must be on with adequate water flow through heater.

2.Gas valve must be in "ON" position. Thermostat set higher than pool water temperature.

3.Jumpers are for temporary check only. If left in place, they could cause the heater to burn up.

Light pilot

If pilot burner remains lit

Jump across both "TH"

wires on gas valves

If main burner fires,	If main burner does not	Replace
remove jumper	fire, remove jumper	gas
		valve

If pilot burner goes out when main burner lights or when gas valve knob is released

Remove both "TH"

wires from gas valve.

Relight pilot

If pilot burner does not light

Check gas supply, gas line size, gas pressure. Also check for insects or debris in pilot output

	Jump across pressure
		switch	terminals
If main burner fires,				If main burner does not
remove jumper				fire, remove jumper
Clean filter				Jump across thermostat

If pilot burner stays on

Problem is a wire or component short to cabinet or low gas pressure

If burner does not remain lit, attach millivolt meter and read pilot output

If above 500mV, replace gas valve

Check for adequate water

flow from filter

Replace pressure switch

If main burner fires,

remove jumper

Replace thermostat

If main burner does

NOT fire...

Jump across each

high limit and remove

jumper

Replace high limit that caused heater to fire

If below 500mV, check gas pressure. Also check for insects or debris in the pilot burner

If output is still low, replace pilot generator

1Raw Output (700mV± 100)

Pilot generator disconnected from valve (knob must be held down to keep pilot on).

White – Negative Red + Positive

2Pilot Load (500mV± 100)

Pilot generator connected to valve-Power applied to pilot solenoid. TP(Thermopile-Robertshaw)

PP(Power Pile-Honeywell) TH TP – Common

TH PP – Common

3Main Valve Load (200mV± 100)

Control/Limit circuit closed (All switches "ON") TP(Thermopile-Robertshaw)

PP(Power Pile-Honeywell) TH TP – Common

TH PP – Common

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