System Checkout - Honeywell R7140G Installation Instructions Manual

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
R7140 Relay Module.
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.
Checkout Step
Preliminary Inspection
Flame Signal Measurement
Initial Lightoff Check for Proved Pilot
Initial Lightoff Check for Direct Spark Ignition
Pilot Turndown Test
Ignition Interference Test
Hot Refractory Saturation Test
Hot Refractory Hold-in Test
Ignition Spark Pickup
Response to Other Ultraviolet Sources
Flame Signal with Hot Combustion Chamber
Safety Shutdown Tests
Preliminary Inspection
Perform the following inspections to avoid common problems.
Make certain that:
1. Wiring connections are correct and all terminal screws
are tight.
2. Flame detector(s) is clean, installed and positioned
properly. Consult the applicable Instructions.
Table 9. Checkout Steps and Applicable Detection Systems.
Piloted
Systems DSI Systems
X
X
X
X
X
X
X
R7140G,L,M BURNER CONTROL MODULES
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.
Incorrect wiring can cause equipment damage.
Each relay module type is unique. Using existing
wiring on a relay module change can cause equipment
damage.
IMPORTANT
1. If the system fails to perform properly, 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
Volt-ohmmeter (1M ohm/volt minimum sensitivity) with:
• 0-300 Vac capability.
• 0-6000 ohm capability.
• 0-10 Vdc capability.
Checkout Summary
Table 9 provides an overview of checkout steps performed for
each applicable system.
See Installation Instructions for location of component parts
and terminal locations.
Infrared Flame
Detectors
X
X
X
X
X
X
3. Combination of amplifier and flame detector(s) is
correctly used. See the amplifier specifications.
4. Plug-in amplifier and purge card (if required) are
securely in place.
5. Burner is completely installed and ready to fire; consult
equipment manufacturer instructions. Fuel lines are
purged of air.
6. Combustion chamber and flues are clear of fuel and fuel
vapor.
27
Flame Rod
Systems Flame Detectors
X X
X X
X
X
X X
X X
X X
Ultraviolet
X
X
X
X
X
X
X
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