Page 37
NOTE: Check for good quality pilot flame.
See Section 9.C on page 38.
NOTE: Check the flame current and make the
necessary adjustments to the pilot valve. See Section
9.C on page 38. Flame current should be set to a
minimum of 1.O micro amp.
7. When pilot flame is sensed, the main valve is energized.
NOTE: The limits, damper switch and pilot flame are
continuously monitored during main valve operation.
If any of these are opened or pilot flame is lost the
main valve is immediately de-energized. A blinking
green LED will indicate the cause of the shutdown
(limits, v-sw, or flame).
8. Observe the main flame pattern on all burners.
There should be minimal pulsing, unstable or lifting
flame patterns. For any abnormal flame, check gas
pressures and orifice alignment. If the gas pressures
and orifice alignments are good, then the air shutter
needs to be adjusted.
On all burners exhibiting an abnormal flame, use a
5/16 inch wrench to loosen (do not remove) the air
shutter locking screw. Slowly close or open the air
shutter until a normal flame is observed then re-
tighten its associated locking screw. If returning to
factory setting is desired, measure one of two ways.
1-Measure. Factory setting is .75” from shutter to
burner orifice mounting plate. 2-Use the Mini-Gauge
to set to factory starting point. See Figure 40 and
Figure 41.
9. After the startup, the ignition system safety device
must be tested. To test, close the manual gas valve
and verify that the burner flame is extinguished and
the boiler continues to try to restart (continuous retry
of pilot). You can then allow the boiler to restart by
opening the manual gas valve.
10. Allow the boiler to operate until the target
temperature or high temperature set point is
reached. The yellow TARGET LED or the yellow
HI-TEMP LED will light. The main burner and pilot
flame will turn off. The FLAME LED will turn off.
11. The damper will begin to close and the V-PWR,
V-SW and LIMITS LEDs will turn off.
12. Lower the room thermostat temperature to remove
the call for heat. The third decimal, lower right of
the control display will turn off
WARNING
Fire, explosion, or carbon monoxide hazard. Water
damage can lead to unreliable operation or cause
the control to malfunction which could lead to severe
personal injury or death. Do not install the control
module where it can get wet. Always replace the control
if it gets wet or if it has any signs of water residue.
Figure 39. The Mini-Gauge (included with the
installation kit) for Orifice Adjustment
Mini-Gauge
stands vertically
for Orifice Angle
Adjustment
Air shutter
locking screw
Air shutter
locking
screw
Align with Mark
Figure 40. The Mini-Gauge for Shutter Adjustment
Figure 41. The Mini-Gauge for Orifice Adjustment
NOTE Always test for a complete electrical system
ground. High voltage ignition can cause electrical
interference if not properly grounded.
WARNING
Electrical shock hazard. The ignition circuit of the
control can produce over 10,000 volts which can
cause severe injury or death.
M
INI-
T
HERM
JX
Residential Boilers
®
