7800 SERIES Relay Modules
CHECKOUT AND TEST
This publication provides general checkout and troubleshooting procedures for the 7800 SERIES Relay Modules.
SYSTEM CHECKOUT
IMPORTANT
Perform all Static Checkout Procedures in the applicable relay module installation instructions before starting these procedures.
WARNING
Explosion Hazard.
Can cause serious injury or death.
Do not allow fuel to accumulate in the combustion chamber for longer than a few seconds without igniting to prevent danger of forming explosive mixture Close manual fuel shutoff valve(s) if flame is not burning at end of specified time.
WARNING
Electric Shock Hazard.
Can cause serious injury or death.
1.Use extreme care while testing system. Line voltage is present on most terminal connections when power is on.
2.Open master switch before removing or installing 7800 SERIES Relay Module or Keyboard Display Module connector.
Make sure all manual fuel shutoff valve(s) are closed before starting initial lightoff check and Pilot Turndown tests.
Do not put the system in service until you have satisfactorily completed all applicable tests in this section and any others recommended by the original equipment manufacturer..
Limit trial for pilot to ten seconds. Limit the attempt to light main burner to two seconds after fuel reaches burner nozzle. Do not exceed manufacturer nominal lightoff time.
CAUTION
Equipment Malfunction or Damage Hazard. Each relay module type is unique. Using existing wiring on a relay module change can cause equipment damage.
Make wiring changes when a relay module is replaced with a different 7800 SERIES Relay Module to sequence burner.
IMPORTANT
1.If the system fails to perform properly, note the fault code, fault message, equipment status, and sequence time on the display. Then refer to the Troubleshooting section.
2.Repeat all required Checkout tests after all adjustments are made. All tests must be satisfied with the flame detector(s) in their final position.
Equipment Recommended
S7800A Keyboard Display Module
Checkout Summary
Table 1 provides an overview of checkout steps performed for each applicable system.
See Installation Instructions for location of component parts and/or Q7800 Specifications for terminal locations.
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