Burnham V9A - Manual (Page 46)

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4. ON WATER BOILERS WITHOUT TANKLESS
HEATERS, set high limit dial on L4006A at 210°F.
This temperature may be varied to suit requirements
of installation.
5. ON WATER BOILERS WITH TANKLESS
HEATERS, set low limit operating control dial at
190°F and high limit dial 210°F. Operating control
must be a minimum of 20° below high limit setting.
Set differential at 25°.
D. ADJUST BURNER according to the Burner Manual.
1. FLAME FAILURE
The V9A boiler controls operate the burner
automatically. If for unknown reasons the burner
ceases to fire and the reset button on the primary
control is tripped, the burner has experienced
ignition failure. Before pressing the reset button,
call your serviceman immediately.
WARNING
Do not attempt to start the burner when excess
oil or gas has accumulated in the combustion
chamber, when the unit is full of vapor, or when
the combustion chamber is very hot.
E. TEST CONTROLS
WARNING
Before installation of the boiler is considered
complete, the operation of the boiler controls
should be checked, particularly the low water
cutoff and the high limit control.
All controls must be checked prior to putting the boiler
in service.
1. CHECK OPERATING CONTROL OPERATION.
Raise and lower operating control setting as required
to start and stop burner.
2. CHECK OPERATION OF HIGH LIMIT
CONTROL —
Jumper Operating Control Terminals. Allow burner
to operate until shutdown by limit. Installation is
not considered complete until this check has been
made. REMOVE JUMPER.
3. CHECK LOW WATER CUTOFF control with water
level at normal water line (see Figure 1). Raise
operating control setting to allow burner to operate.
Open boiler drain to allow water level to drop to
bottom of sight glass until burner operation is shut
down by low water cutoff.
Close boiler drain and refill to normal water line.
Burner should automatically restart during fill.
RESET OPERATING CONTROL.
CAUTION
Probe and float type low water cutoff devices
require annual inspection and maintenance.
4. CHECK OPERATING CONTROL on boiler
equipped with tankless heaters. With burner off,
draw hot water until burner starts, then turn off hot
water and check burner shutdown.
F. BOILER AND SYSTEM CLEANING - STEAM
BOILER
NOTICE
A qualified water treatment chemical specialist
should be consulted for recommendations
regarding appropriate chemical compounds and
concentrations which are compatible with local
environmental regulations.
WARNING
Chemicals used in treating boiler water are
toxic and/or harmful. Always use protective
clothing and equipment when working with/
near chemicals. Contact local authorities
to determine if treated boiler water can be
discharged into local waste water system.
1. Oil, greases & sediments which accumulate in a
new boiler and piping must be removed in order
to prevent an unsteady water line and carry over
of the water into the supply main above boiler.
Operate the boiler with steam in the entire system
for a few days allowing the condensate to return
to the boiler. If the condensate can temporarily be
wasted, operate boiler only for the length of time
it takes for condensate to run clear. If the latter
cannot be achieved or if the condensate is returned
to the boiler, boil out the boiler using the SURFACE
BLOWOFF connection. See Figure 38a.
a. Drain boiler until water is just visible in gauge
glass. Run temporarily 1½” pipe line from the
surface blowoff connection to an open drain or
some other location where hot water may be
discharged safely. Do not install valve in this
line.
b. Add an appropriate amount of recommended
boilout compounds.
c. Start burner and operate sufficiently to boil
the water without producing steam pressure.
Boil for about 5 hours. Open boiler feed pipe
sufficiently to permit a steady trickle of water
from the surface blowoff pipe. Continue this
slow boiling and trickle of overflow for several
hours until the water coming from the overflow
is clear.