Linkage Adjustment For Pulse Modulated Boilers - FULTON PHW 300 Installation And Operation Manual

SECTION 3
PHW-IOM-2013-0214
3. Set temperature control to desired setpoint.
4. Turn operating switch on boiler to "ON" position. The boiler is energized
and 35 second prepurge begins. After 35 seconds the spark ignitor and gas
valve (2 seconds later) are energized. If combustion is not sensed within
4 seconds, gas and spark are de-energized. The control will recycle to
prepurge, only if the allowed number of retry attempts is not exceeded.
5. If the gas valve opens but the boiler does not start, check the spark plug to
be sure it is working properly.
6. The plug may be bad or the plug wire may be loose. Check gap of plug.
It should be .050" to .060". When replacing the spark plug be sure to use
Never Seize on threads of plug.
7. When the unit res and pressure is sensed in air valve housing and the
ame rod senses ame, the unit will continue to operate until main power
is shut o to the controller either through the temperature switch or main
power switch. Once the pressure is sensed in the air valve housing (proof of
ame) and the ame rod senses ame, the assist fan and spark will turn o .
8. Do not change ame pressure switch settings.
9. Should overheating occur, or the gas supply fails to shut o , shut o the gas
supply at a location external to the boiler.
FIGURE 24 GAS COCK HANDLE IN ON POSITION

Linkage Adjustment for Pulse Modulated Boilers

The following covers the adjustment of the linkage arms and rods between the
modulation (mod) motor and gas butter y valve, and also between the mod
motor and exhaust butter y valve. Prior to start-up, ensure both the gas and
exhaust butter y valves are in the closed position with the boiler o .
SETTING HIGH FIRE
1. When the boiler is energized, the mod motor will be driven to High Fire
driving the gas and exhaust butter y valves to the open position. At
High Fire the slot in the shaft of the mod motor should be horizontal in
orientation. At this point it is important to note that the mod motor and
gas butter y valve linkage arms are as close to parallel as possible. Also
note that the mod motor and exhaust butter y valve linkage arms should
be parallel. Location of the lock nuts on the linkage rods is not important.
Questions? Call (315) 298-5121, or visit us online at www.fulton.com
OPERATION
!
WARNING
Do not attempt to start the boiler for
any testing before lling and purging
the boiler. A dry re will seriously
damage the boiler and may result in
property damage or personnel injury
and is not covered by warranty.
Before commissioning the boiler,
verify with authorized personnel that
the gas lines have been purged.
Never attempt to operate a boiler
that has failed to pass all the safety
checks.
Never leave an opened manual air
vent unattended. In the event an
opened vent is left unattended, water
damage could occur.
4
CAUTION
Do not use this equipment if any part
has been under water (or subjected to
heavy rains/water if the equipment
does not have NEMA 4 wiring, controls
and instrumentation). Immediately
call a quali ed service technician to
inspect the equipment and to replace
any part of the control system and/or
gas control(s) which have been under
water.
Commissioning/Start up by a non-
Fulton authorized person will void the
product warranty.
Please read these instructions and
post in an appropriate place near the
equipment. Maintain in good legible
condition.
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