Types 1098-EGR and 1098H-EGR
10
E0711
Figure 5.
Boiler Fuel Configuration
TyPE 1098-EgR SIzE 70
wITH quICK OPENINg CAgE
20 psi / 1,4 bar 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 Configuration Installation Guide
Note
Modulating solenoid load valves provide
a definite time delay in moving from
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-inch / 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.