Rheem P-M207 Operating Instructions - Page 44
Electrical - Standing Pilot Millivolt, Pool Or Spa Heater, Electrical Check With Millivolt Gas Valve
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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 remove jumper fire, remove jumper Replace 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, remove jumper If main burner does not 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 1 Raw Output (700mV± 100) Pilot generator disconnected from valve (knob must be held down to keep pilot on). White - Negative Red + Positive 2 Pilot 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 3 Main Valve Load (200mV± 100) Control/Limit circuit closed (All switches "ON") TP(Thermopile-Robertshaw) PP(Power Pile-Honeywell) TH TP - Common TH PP - Common 44