1. All pressure controls are equipped with a screw allowing for
setting of the desired operational and hi-limit pressures.
2. Factory setting of Hi-Limit Pressure Control is 10 PSI and Operating
Pressure Control is 5 PSI, as shown in Figure 1.
3. For optimal performance, pressure controls should be kept at
the factory setting.
4. If adjustments are needed, turn adjustment screw on top
of pressure controls closewise to increase pressure, counter-
clockwise to decrease pressure, as shown in Figure 2.
Models CU360 - CU3000 are provided with one (1) auto-
matic reset operating pressure control and one (1) manual reset high limit
pressure control. Models CU4500 is provided with two (2) automatic reset
operating pressure controls and one (1) manual reset high limit pressure
control.
3.
Pressure control operation check:
Manually close the steam outlet
valve. Switch the generator on to allow for steam pressure build-up.
Pressure gauge reading will build and the operating pressure control
will shut off the generator at the pressure setting. Re-setting the oper-
ating pressure control is accomplished by manually bleeding off pres-
sure through the steam outlet valve and allowing the pressure to drop
below the desired set point.
TORQUE VALVES
Check to insure all element flange bolts, element terminals, and
contactor terminals are tightened to the following specifications.
mr
.
steam
®
C U S E R I E S
Installation, Operating & Maintenance Manual
PRE-OPERATION CHECK
Low water Cutoff (LWCO) and Feed Control Operation and Testing
1. All valves for incoming water supply are to be
fully opened. Main disconnect switch to be in
"ON" position. Generator switch to be in “ON"
position. Since generator will be empty, water
solenoid will be energized allowing the genera-
tor to fill with water until proper level is reached.
Then the contactors will energize and supply
voltage to heating elements.
2. Water level control operation: At this point the
water should be visible approximately half way
up the sight glass. Slowly open the drain valve
located at bottom of the generator. The water
level will fall allowing the low water cutoff/water
level control to energize the feed water system.
Close the drain valve for proper operation.
3.
Low
water
cutout
switch
performance.
Close
water
feed
valve. Open the drain valve completely. Maintain this condi-
tion until the water level falls within the gauge glass
enough to cause the low water cutout switch to de-ener-
gize the heating elements. All contactors will be in the de-
energized state at this time. Close the drain valve. For auto-
matic re-setting type low water cutoff switches, feed system
will return the water level to normal. For manual re-set the
reset button must be depressed to complete circuit. The
generator is now qualified for proper low water cutout and
normal liquid-level operating conditions.
For automatic blowdown, turn timer off and on
until water level is low enough to de-energize heaters.
Steambath generators are provided with one hi-limit pressure
control and at least one operating pressure control.
TORQUE VALUES
Element Flange Bolts
22 lb-ft
Element Terminals
20 lb-in
Contactor Terminals : Tighten to
torque specified on contactor.
PRESSURE CONTROLS OPERATION AND TESTING
Figure 1
Figure 2
Adjustment Screw
See page 36 for additional information and illustrations.
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