Operation (contd.)

27

HEAT (HEAT)

The heat light is on any time the thermostat has signaled a call for heat which initializes the ignition safety firing circuit -- the light comes on to indicate successful firing of the main burners.

SERVICE (SERVICE)

The service light is off during normal operation of heater. The light only comes on if a problem with a control has occurred or when the heater is first firing. The problem must be investigated by the serviceman prior to attempts to fire the heater again.

The diagrams that follow give examples of troubleshooting a malfunctioning heater using the assistance of the indicator lights.

TROUBLESHOOTING (CONTROLS)

Example of troubleshooting with the assistance of the indicator lights.

 

 

 

SYMBOL TABLE

 

 

 

 

 

 

 

 

SWITCH OR DEVICE

 

SWITCH OR DEVICE

 

 

 

 

 

 

OPEN CIRCUIT

 

 

 

 

 

 

LED OFF

 

CLOSED CIRCUIT

 

 

 

 

LED LIT

(BLOCK CURRENT)

 

 

 

 

 

 

(PASS CURRENT)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IGNITION MODULE

 

 

 

 

 

 

IND

GND

VAL

INCOMING

TRANSFORMER

CIRCUIT

 

 

HI TEMP

 

 

GAS VALVE

 

REMOTE

PRESS

TFUSE

 

MV

LINE VOLTAGE

 

BREAKER

LIMIT SWITCHES

 

MV

THERMOSTAT

RELAY

THERM

POWER

AUX

SERVICE

 

PRESS

 

HEAT

 

 

FRONT PANEL LEDS

PWR

TSTAT

RMT

PRESS

HI TEMP

TFUSE

MV

HEAT

 

 

 

 

SRVE

 

 

 

 

 

 

 

CLOSE IF

 

 

 

 

 

 

 

NO MV

 

 

 

THERMOSTAT CIRCUIT BOARD

WATER AT SELECTED TEMPERATURE.... NORMAL OPERATION

OR POOL/OFF/SPA THERMOSTAT SELECT SWITCH OFF.... NORMAL OPERATION

INCOMING TRANSFORMER

LINE VOLTAGE

THERM

POWER

AUX

SERVICE

PRESS

 

HEAT

 

 

FRONT PANEL LEDS

 

 

 

 

 

 

IGNITION MODULE

 

 

 

 

 

IND

GND

VAL

CIRCUIT

 

REMOTE

PRESS

HI TEMP

TFUSE

 

 

BREAKER

 

LIMIT SWITCHES

 

 

 

THERMOSTAT

 

 

 

 

 

 

 

RELAY

 

 

 

 

 

 

PWR

TSTAT

RMT

PRESS

HI TEMP

TFUSE

MV

HEAT

 

 

 

 

SRVE

 

 

 

CLOSE IF

NO MV

THERMOSTAT CIRCUIT BOARD

THERMOSTAT CALLING FOR HEAT - PUMP OFF(NO PRESSURE) BLOCKS FIRING NORMAL OPERATION

GAS VALVE MV

MV

Rev. B 1-17-03

A-5

P/N 472128

Page 27
Image 27
Pentair CH installation manual Troubleshooting Controls, Heat Heat

CH specifications

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