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Figure 15. Ignition Control Board Jumper Settings
switch "D" on the Central Control Board is placed in the "ON" position, it will show the temperature at the tank probe. (See Figure 14.) The push buttons on the Display Board allow the user to program and view several system parameters described in the following text. The Display Board is connected to the Central Control Board through a 6 conductor cable assembly with modular plug terminations. In addition, an 8 conductor modular jack on the Display Board allows for connecting a remote display board.
When power is applied to the Control System, the Display Board will initially run through a
With the display board, the user can make adjustments to many of the appliance’s control features. This includes the following:
Options/Features Setting Procedures
•Set Appliance Stage Temperature
•Set Appliance Stage Switching Differential Value
•Select Appliance
•Check Appliance Cycle Count
•View Last Error Encountered by Control
•Control the water temperature in a storage tank
Green Status Lights
Green LEDs indicate when a given stage has sensed flame and is in the heating state. They also are used to indicate when the
STAGE 1: Stage One in Operation
STAGE 2: Stage Two in Operation
STAGE 3: Stage Three in Operation
STAGE 4: Stage Four in Operation
Red Fault Lights
The Red LEDs are illuminated to show faults and help in trouble shooting. There are three faults (High Gas Fail, LWCO and Power Vent Fail) listed as "Optional" which are only functional when the particular "Optional" equipment is included with the boiler. The red stage LEDs indicate on which stage a given fault has occurred. (See Figure 16.)
Blocked Flue: Blockage in Flue
Probe Fail: One of the controlling Probes has failed
Insufficient Air: Not enough Air to Close Switch
Circulate Fail: Flow Switch Not Closed
Gas Valve Fail: Relay for Gas Valve in Incorrect State
High Limit: High Limit has been Exceeded
Flame Fail: No Flame Sensed upon Ignition
Igniter Fail: Igniter did not reach Minimum Amperage
Low Gas Fail: Gas Pressure too low to Close Switch
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