Types 1098-EGR and 1098H-EGR
10
E0711
Figure 5. Boiler Fuel Conguration
TYPE 1098-EGR SIZE 70
WITH QUICK OPENING CAGE
20 psibar MAXIMUM
TYPE Y600AM
AUXILIARY PILOT
TYPE 6352
WORKING PILOT
SAFTEY SHUT-OFF VALVE
TO BOILER
FAST-ACTING
LOAD VALVE
TYPE
1098-EGR
GAS
SUPPLY
PILOT
GAS
SUPPLY
PILOT GAS
REGULATOR
TO PILOT LIGHT
E0710
Figure 6. Boiler Fuel Conguration Installation Guide
Note
Modulating solenoid load valves provide
one position to the other, effectively
preventing sudden pressure changes in
the system. Alternately, a snap-acting
solenoid valve can be furnished with a
characterized valve plug that, by allowing
maximum capacity to be reached at a
greater proportion of total travel, slows
the action slightly. This action does
not control shock as effectively as
modulating solenoid valves.
Installation
1. Perform the Standard Single-Pilot Regulator
Installation section through step 3, making sure
that the regulator is installed with the actuator
below the main valve as shown in Figure 4.
2. Run a 1/2 in. / 13 mm or larger pilot supply line
from the upstream pipeline to the 1/2 NPT supply
connection in the pipe tee as shown in Figure 4. Do
not make the connection in a turbulent area, such as
near a nipple, swage or elbow. If the maximum pilot
inlet pressure could exceed the pilot rating, install a
separate regulator in the pilot supply line and provide
vent valves so that pressure can be properly isolated
and relieved from the regulator.
3. Attach a 1/2 NPT downstream pressure control line
ten pipe diameters downstream of the regulator in
a straight run of pipe. Do not make the tap near
any elbow, swage or nipple, which might cause
turbulence. Connect the other end of the control
line to the 1/4 NPT connection in the control pipe
tee as shown in Figure 4. Install a hand valve in the
control line to shut off the control pressure when
the bypass is in use. Also use the hand valve to
dampen out pulsations, which may cause instability
or cycling of the regulator.
4. Consult the appropriate instruction manual for
installation of an optional pneumatic or electric
remote control drive unit. For optional remote
pneumatic loading of 6350 or 61 Series pilots,
make the loading piping connections to the
1/4 NPT vent connection.
(184 pages)
(128 pages)
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