Types 1098-EGR and 1098H-EGR
8
CAUTION
Introduce pilot supply pressure into
the regulator before introducing any
downstream pressure, or internal damage
may occur due to reverse pressurization
of the pilot and main valve components.
Always use pressure gauges to monitor downstream
pressure during startup. Procedures used in putting
this regulator into operation must be planned
accordingly if the downstream system is pressurized
by another regulator or by a manual bypass.
Note
For proper operation, pilot supply
pressure must exceed control pressure
the actuator nameplate as minimum
differential pressure.
The only adjustment necessary on a Type 1098-EGR
or 1098H-EGR regulator is the pressure setting of
the pilot control spring. Turning the adjusting screw
clockwise into the spring case increases the spring
compression and pressure setting. Turning the
adjusting screw counterclockwise decreases the spring
compression and pressure setting.
Pilot Adjustment
To adjust standard 6350 Series pilots: loosen the
locknut and turn the adjusting screw. Then tighten
the locknut to maintain the adjustment position. On
a standard Types 6352 through 6354M pilot, a closing
cap must be removed before adjustment and
replaced afterward.
!
WARNING
To avoid possible personal injury from
a pressure-loaded pilot, carefully vent
the spring case before removing the
closing cap. Otherwise, trapped loading
pressure could forcefully eject the freed
closing cap.
To adjust the 61 Series or Type Y600AM pilots:
remove the closing cap and turn the adjusting screw.
Any adjustments made should set the controlled
pressure within the appropriate spring range shown
in the Table 2.
CONTROL LINE
TYPE 1098-EGR OR 1098H-EGR REGULATOR
WITH STANDARD 6350 SERIES PILOT
VENT
FILTER
PILOT
SUPPLY
LINE
1/2-INCH (13 mm)
PIPE
1/2-INCH
(13 mm)
PIPE
TO PILOT LIGHT (IF
USED FOR BOILER
FUEL INSTALLATION)
48A6566-A
B1622
4 MAIN PIPE
DIAMETERS
10 MAIN PIPE DIAMETERS
Figure 3. Standard Single-Pilot Installation
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