Honeywell 7800 Series Manual page 22

RM7885A
CHECKOUT
!
CAUTION
If an RM7885A is replaced with a lower or higher
functioning 7800 SERIES Relay Module, the burner
will not sequence unless wiring changes are made.
IMPORTANT:
1. If the system fails to perform properly, refer to 7800
SERIES System Annunciation Diagnostics and
Troubleshooting, form 65-0118.
2. Repeat ALL required Checkout Tests after all ad-
justments are made. ALL tests must be satisfied with
the flame detector(s) in its FINAL position.
EQUIPMENT RECOMMENDED
Volt-ohmmeter (20 kohm/volt minimum sensitivity):
• 0-300 Vac capability.
• 0-6000 ohm capability.
• 0-10 Vdc capability.
CHECKOUT SUMMARY
NOTE: An alarm will sound until a flame is present.
• Preliminary inspection—all installations.
• Flame signal measurement—all installations.
• Initial lightoff check for proved pilot—all installa-
tions using a pilot.
• Initial lightoff check for direct spark ignition of
oil—all burners using DSI.
• Pilot turndown test—all installations using a pilot.
• Hot refractory saturation test—all installations us-
ing Infrared (lead sulfide) Flame Detectors.
• Hot refractory hold-in test—all installations.
• Ignition interference test—all installations using
flame rods.
• Ignition spark pickup—all installations using Ultra-
violet Flame Detectors.
• Response to other ultraviolet sources—all installa-
tions using Ultraviolet Flame Detectors.
• Flame signal with hot combustion chamber—all
installations.
• Safety shutdown tests—all installations.
See Fig. 19 for location of component parts and see Fig.
7 or Q7800 Specification for terminal locations.
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.
3. Correct combination of amplifier and flame
detector(s) is used; see Table 2 for the applicable Specifi-
cations.
4. Plug-in amplifier is 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.
7. Power is connected to the system disconnect switch
(master switch).
8. Lockout switch is reset (push in reset pushbutton)
only if the RM7885A is powered, see Figs. 1 and 2.
9. System is in the STANDBY condition. POWER
LED is energized.
10. All limits and interlocks are reset.
Fig. 19—Flame signal measurement.
NEGATIVE (-)
METER LEAD
22
POSITIVE (+)
METER LEAD
20K OHM/
VOLT METER
M7554