Testing Procedure

WATER CONTROL BOARD TESTING PROCEDURE

This test procedure is to be used to determine if the control is working properly. It is not intended to de- termine why the control may have failed.

If testing shows that the control is operating properly, check all probe and solenoid wiring and the condi- tion of the electrodes in the steam chamber.

Contact the factory if the boiler still does not operate properly after completing the testing.

Tools Needed:

»Digital or Analog V-O-M meter.

»Alligator clip type test jumpers (2 sets min.).

Turn Off Power to Control:

»Use V-O-M to verify there is no power at terminals L 1 & L2.

»Use V-O-M to verify that there is no power at terminals ‘FW(NO)’, ‘LO LlTE(NC)’ & ‘HTR(NO)’. If there is power at any of these terminals, you will need to find the source and turn it off.

Remove Wires from Probe and Relay Switch Terminals:

»DO NOT remove wires from L 1 & L2 terminals.

»Tag wires and remove from probe and relay contact terminals including ‘GND’ terminal.

»Tag and remove wires from ‘RESET’ terminals.

»Connect jumper wire to both ’RESET’ terminals.

Turn Power On to Terminals L 1 & L2:

»‘LED l’ should turn on.

»‘LED 2’ should be off.

»‘LED 3’ should be off.

»Use V-O-M to verify that there is power at ‘FW(NO)’ & ‘LO LlTE(NC)’ terminals and no power ‘HTR(NO)’ terminals

Test Feedwater Function:

»Connect jumper wire to ‘FW HIGH’ and ‘GND’ terminals.

»‘LED l’ should turn off after a 10 sec- ond delay.

»Use V-O-M to verify that there is no power at the ‘FW (NO)’ terminal.

»Remove jumper from ‘FW HIGH’ and

»‘GND’ terminals. . ‘LED l’ should turn on.

»Use V-O-M to verify that there is pow- er at the ‘FW(NO)’ terminal.

Test Primary Low Water Function:

»Connect jumper wire to ‘LW(1) and ‘GND’ terminals.

»‘LED 3’ should turn on.

»Remove jumper wire from ‘LW(1)’ and ‘GND’ terminals.

»‘LED 3’ should turn off after a 3 second delay.

»Connect jumper wire to ‘LW(1)’ and ‘GND’ terminals.

»‘LED 3’ should turn on.

IMPORTANT:

Jumper wire between ‘LW(1) and ‘GND’ terminals must remain in place to test secondary low water function.

Test Secondary Low Water Function:

»Connect jumper wire to ‘LW(2)’ and ‘GND’ terminals.

»‘LED 2’ should remain off.

»Use V-O-M to verify that there is pow- er at the ‘LO LlTE(NC)’terminal and no power at the ‘HTR(NO)’ terminal.

»Remove the jumper wires from the ‘RESET’ terminals.

»‘LED 2’ should turn on.

»Use V-O-M to verify that there is no power at the ‘LO LlTE(NC)’ terminal and power at the ‘HTR(NO)’ terminal.

»Connect jumper wire to ‘RESET’ ter- minals.

»Remove jumper wire from ‘LW(2)’ and ‘GND’ terminals.

»‘LED 2’ should turn off after a 3 second delay.

»USE V-O-M to verify that there is pow- er at the ‘LO LlTE(NC)’ terminal and no power at the ‘HTR(NO)’ terminal.

»Connect jumper wire from ‘LW(2)’ and ‘GND’ terminals.

»‘LED 2’ should remain off.

IF ANY OF THE FUNCTIONS DO

NOT WORK, REPLACE THE

BOARD!

IF ALL FUNCTIONS WORK, TROUBLE-SHOOTING OTHER COMPONENTS WILL BE REQUIRED!