OPERATION AND MAINTENANCE OF CONTROLS
1 INSPECTION BEFORE STARTUP OF CONTROLS. Before placing a new control system
i n service, or after an overhaul, make sure the following prestartup
requirements are fulfilled.
( a ) Installation, repair, and cleanup work completed.
(b) Installation tested for leaks.
( c ) Approved drawings, diagrams, and manufacturers' instruction manuals
a v a i l a b l e to the operators for study and reference. Operators must understand
t h e control equipment and control systems.
( d ) Clean, dry, compressed air at proper pressure available for
o p e r a t i o n of pneumatic controls.
(e) Correct electric power supply available for electrical and
e l e c t r o n i c components.
( f ) Controlled devices shut down, bypassed, or controlled manually.
( g ) All control components installed, tested, and adjusted, as per
m a n u f a c t u r e r ' s instructions.
( h ) All piping and tubing blown out, cleaned, and filled with normal
o p e r a t i n g fluid at normal temperature.
( i ) All air vented and removed from liquid filled systems.
(j) All wiring circuits correctly and securely connected.
2 STARTUP OF CONTROLS. Proceed as follows:
( a ) When controls are used for regulating steam flow, slowly warm the
l i n e and drain the condensate before placing the regulating valves in
( b ) Blow down strainers and moisture separators, if provided.
( c ) Adjust instrument air pressure reducing valves to obtain correct
i n s t r u m e n t air supply pressure.
( d ) Place controllers in service using the approved procedures as
o u t l i n e d in the manufacturers' manuals.
( e ) Adjust controllers to obtain the required control pressure,
t e m p e r a t u r e s , or flow.
3 NORMAL OPERATION OF CONTROLS. Blow down strainers and clean the baskets at
r e g u l a r i n t e r v a l s , o r as required, depending on the type of installation.
Condensate from air filters and moisture separators should be blown once per
s h i f t . A d j u s t the controllers as required to obtain correct pressures,
t e m p e r a t u r e s , and flows.