Part 10. Start-Up Procedure; Operating Instructions; Adjusting The Operating Set Points Of The Vwh Display - Heat Transfer MODCON VWH 300 LP Installation & Maintenance

PART 10. START-UP PROCEDURE

FOR YOUR OWN SAFETY READ
BEFORE OPERATING
1. This appliance does not have pilot. It is
equipped with an ignition device which
automatically lights the burner. Do not try to
light the burner by hand.
2. BEFORE OPERATING smell all around the
appliance area for gas. Be sure to smell next
to the floor because some gas is heavier than
air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas
suppliers' instructions.
• If you cannot reach your gas supplier, call
the fire department.
• Turn off gas shutoff valve (located inside
of the Boiler) so that the handle is
crosswise to the gas pipe. If the handle
will not turn by hand, don't try to force or
repair it, call a qualified service
technician. Force or attempted repair
may result in a fire or explosion.
4. Do not use this appliance if any part has been
under water. Immediately call a qualified
service technician to inspect the appliance and
to replace any part of the control system and
any gas control which has been under water.
5. The Mod Con Boiler shall be installed so the
gas ignition system components are
protected from water (dripping, spraying,
rain, etc.) during appliance operation and
service (circulator replacement, condensate
trap, control replacement, etc.)
A. OPERATING INSTRUCTIONS
Remove boiler cover. If you smell gas, STOP .
Follow listed safety instructions. If you do not
smell gas, follow the next steps.
1. Turn on all electric power to appliance.
2. Adjust the temperature setpoint of the Mod
Con VWH Boiler if desired. The factory
default setting is 180°. If changes are
necessary follow "Adjusting The Mod Con
Setpoint" in this section.
55
GAS-FIRED HOT WATER SUPPLY BOILER
3. On the intial start-up of this boiler, you may
note a lock-out code of |F01|. This is a low gas
pressure switch lock-out from the factory-
installed low inlet gas pressure switch (located
on the left for the Mod Con 500 and on the
right for the Mod Con 850). You will also see a
yellow LED illuminated under the cover of the
inlet gas pressure switch. Once the gas is
turned on, reset the gas pressure switch by
FIRMLY pressing on top of the plastic cover
over the red reset button. You will note that
yellow LED has now gone out. Press and hold
the { S 4} key on the control panel for about 4
seconds to begin normal operation.
4. If the tank water temperature is below the
tank set point temperature (tank differential
temperature), the boiler will ignite.
5. If the appliance fails to start, refer to the
Troubleshooting section in the back of this
manual.
B. ADJUSTING THE OPERATING SET
POINTS OF THE VWH DISPLAY
To adjust the temperature set point, differential
values, and display units of the VWH Boiler,
press the { S 3/Program} key for three seconds
until you see Sh then an alternating value of 7°F.
Use the { S 1/–} key or { S 2/+} key on the display to
either increase or decrease the set ting of each
parameter. Use the {S3/Program} button to
advance to each parameter listed in the chart
below. Pressing the { S 3/Program} when you are
at the last parameter on the chart will return the
display to normal operation. If you missed a
parameter or want to make further changes,
simply again press and hold the { S 3/Program} key
for 3 seconds to enter the programming mode.
Boiler Manual