AERCO Steam Generator - Manual (Page 10)

INSTRUCTIONS – AERCO HELITHERM STEAM GENERATOR MODEL SS1B-PLUS
SG-101-8
OPERATING PROCEDURES
OP1. With the installation entirely completed,
including:
• All piping connections have been
made,
• All connecting piping has been
cleaned and blown out,
• All connections per steps 8 and 9
under INSTALLATION have been
made,
turn ON the electrical power supply and
open any stop valve(s) in the Cold
Water inlet line Hold the relief valve in
the Generator top head open to allow air
to escape (otherwise an air pocket will
be built up and the Generator will not fill
properly). The Level Controller will hold
the Water Solenoid Valve open to allow
water to flow into the Generator shell
until the desired water level is reached,
at which time the Level Controller will
close the Water Solenoid Valve. Then
close the relief valve.
OP2. Temporarily set the Pressure Switch
(58) in the Control Box to its high
pressure limit. See Figure SG-101-8,
(Item 58) and the wiring diagram in
Figure SG-101-4.
OP3. Set the Pressure Controller (53) in the
Control Box at the pressure desired to
be held at the Secondary Steam outlet.
OP4. Open any stop valve(s) in the
Secondary Steam outlet line. Open a
steam outlet valve in the process to
insure a flow of steam from the
Generator. For best results in adjusting
the pressure control, a steam flow of
10% to 23% of Generator rating is
desirable.
OP5. Slowly open all stop valves in the
Primary Steam inlet and Condensate
outlet lines.
OP6. Follow the instructions furnished with
the air-operated Pressure Controller and
Control Valve and:
a. Introduce Primary Steam to the
Generator.
b. Adjust the Pressure Controller until
the Secondary Steam outlet
pressure is being held steady at the
desired pressure. If the Secondary
Steam outlet pressure is erratic, see
step OP7 below.
c. Close the process steam outlet
valve which was opened in step
OP4}.
OP7. If the Secondary Steam outlet pressure
is erratic, especially during load
changes:
a. Put a load on the Generator by
opening a steam outlet or outlets in
the process as quickly as possible.
b. Adjust the Pressure Controller to
provide best response on load
changes. See the instruction
furnished with the Controller.
OP8. Adjust the Over-Pressure Limit System
Pressure Switch (58) in the Control Box
to its desired setting -- usually 5 to 7
psig higher than the desired Secondary
Steam pressure.
OP9. The Generator is now set for operation.
No further operation procedure is
necessary unless, or until, further
pressure control adjustments may be
required. If so, repeat steps OP4, OP5,
OP6, OP8, and, if necessary, step OP7.