Sussman ES Installation, Operation And Maintenance Manual - page 12
Sussman Boilers
Installation, Operation & Maintenance Manual
Blowdown
12
A daily blowdown is an essential part of boiler operation. It is the best and most important part of preventative main-
tenance you can give your boiler and will add years of life to the unit. Make sure a blowdown schedule is established
and followed regularly.
In extremely hard water areas, blowdown may be necessary more than once a day. If there is a particular problem
that applies to your local water condition [i.e. high concentrations of minerals etc.] we recommend a consultation
with a reputable local water treatment-engineering firm. Pre-treating the boiler feed water may reduce mineral accu-
mulation enough to allow a daily blowdown to be sufficient.
MANUAL BLOWDOWN INSTRUCTIONS
1.
At the end of the working day, while boiler is still operating, turn boiler main switch to the “OFF” position, close
water supply valve and open disconnect switch.
2.
If blow down valve is plumbed into a blowdown tank, the boiler can be discharged at operating pressure.
3.
If the blowdown valve is not plumbed into a blowdown tank, consult with local plumbing codes regarding boiler
discharge.
4.
When discharge is complete and boiler is drained, close the blowdown valve, open the water supply valve, turn
boiler main switch to “ON” position and close disconnect switch.
5.
When refilling is complete, turn off the boiler unless further operation is needed.
6.
If boiler is equipped with a “Manual Re-set Auxiliary Low Water Cut-off” (as required in some states) the re-set
button must be pushed before the boiler will begin developing steam. Do not push re-set button until the boiler
has refilled with water.
NOTE:
THE USE OF CHEMICAL BOILER CLEANING COMPOUNDS IN THESE BOILERS VOIDS ALL WARRANTIES. SOME
COMPOUNDS CAN/WILL DAMAGE INCOLOY SHEATHED HEATING ELEMENTS AND SHORTEN THE LIFE OF THE ELE-
MENTS.
AUTOMATIC BLOWDOWN INSTRUCTIONS (PN ES81600)
1” NPT, Starts, stops and blows down the boiler automatically, utilizing a programmable time clock a time-delay relay
and motorized ball valve.
If the blowdown valve is plumbed into a blowdown tank, the boiler can be discharged at operating
pressure. If the blowdown valve is not plumbed into a blowdown tank, consult with local plumbing
codes regarding boiler discharge.
NOTE:
The manual valves from the boiler drain and the lower float control equalization tube must be fully open for
the automatic blowdown to be effective.
1.
Program time clock by setting the time boiler is to turn on and off daily. [Refer to instructions in time clock insert.]
2.
When the time clock turns the boiler “off” the blowdown is activated. A red pilot light over the time clock will
come on and remain on while the motorized ball valve is open. The time duration the valve is open is set by an
adjustable potentiometer built into the time delay board. The water level in the boiler after blowdown is complete,
will be approximately at the lower gauge glass valve. (Elements are not exposed to air between operations.)
3.
Boiler will automatically refill at next programmed on cycle.
Blowdown program can be overridden to allow for unscheduled blowdown or operational cycles. Refer to the time
clock instruction insert.
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CAUTION