Sussman ES Installation, Operation And Maintenance Manual - page 14
Installation, Operation & Maintenance Manual
Standard Equipment for ES & HU
Optional Equipment
14
AUXILIARY LOW WATER CUT OFF
• For model ES & HU boilers PN ES81017MR
(with manual reset).
Senses water level electronically using a resistance probe.
When a low water condition is detected, the contactor
control voltage circuit is interrupted and the heating
elements are de-energized. When water level returns to
proper levels voltage is restored to the contactor coils
and the elements are re-energized. For controls with a
manual reset button voltage to the contactor coils is not
restored until the water level has returned to proper
operating levels and the reset button is pushed. Do not
depress the reset button before the correct water level
is achieved.
LINE PRESSURE WATER FEED SYSTEM
• For model ES & HU boilers PN ES99117
Water feed system used to supply makeup water to the
boiler when incoming water line pressure is 10 psig
greater than the operating pressure of the boiler.
Completely factory plumbed and wired; 0-100psig range;
1/2” NPT size. Consists of strainer, solenoid valve
(120/1/50-60Hz), and check valve for automatic feed.
HIGH PRESSURE WATER FEED SYSTEM
• For model ES12-72 PN ES38002A
• For model ES100-180 PN ES38020A
Used to supply makeup water and to maintain constant
water level when the boiler operating pressure is equal to
or greater than incoming water line pressure and conden-
sate is not returned to the boiler.
• ES38002A – Range is 0 – 100 psig, 1/2” NPT size consisting
of strainer, solenoid valve and 1/3 HP 120/1/60 motor and
pump.
• ES38020A – Range is 0 – 125 psig, 3/4” NPT size
consisting of strainer solenoid valve and 1/2 HP 120/1/60
motor and pump.
These assemblies are mounted on rubber shocks and
secured to a steel base mounting plate. These units require
field plumbing and wiring to the boiler.
CONDENSATE RETURN SYSTEM (see page 16)
• For model ES12-72 PN ES38083V; for model
ES85-180 PN ES38084V.
These systems are used whenever condensed steam can
be collected for reuse in the boiler. Returning the conden-
sate to the boiler can save a significant amount of energy.
The water returned is relatively free of corrosive minerals
and carries a substantial amount of heat that does not
have to be replenished. A vacuum breaker is required
whenever a condensate return system is used.
Each system consists of a vertical condensate return tank,
a motor and pump and support plumbing. A 1/2” inlet is
located on the tank to accept make-up water. A vent fit-
ting is located on the condensate tank top for atmospher-
ic air venting. The return fitting is to be plumbed to the
trapped condensate return line coming from the process.
A gauge glass and valve set are mounted on the side of
the condensate tank. The tank has a ball check valve
internally mounted, and a float arm and float ball assem-
bly that serve mechanically allowing make-up water to
enter the tank as the original supply is used. The pump
discharge outlet is to be plumbed to the boiler check
valve. The tank drain valve should be plumbed to a prop-
er drain line. The motor is required to be wired to the
boiler.