Types 1098-EGR and 1098H-EGR
11
Connect the other end of the control line to the
1/4-inch NPT connection in the control
pipe tee as shown in Figure 4. Install a hand
valve in the control line to shutoff 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 a 6350 or
61 Series pilot, make the loading piping
connections to the 1/4-inch NPT vent connection.
Startup
1. Slowly open the pilot supply line hand valve.
2. Slowly open the upstream block valve and partially
open the downstream block valve for minimum ow.
3. Slowly open the hand valve in the control line
and make sure that the standby pilot is set
far enough below the working pilot so that
the standby pilot remains closed during normal
operation. For example, with nal desired settings
of 11-inches w.c. (27 mbar) for the working pilot
and 10-inches w.c. (25 mbar) for the standby
pilot, begin by reducing the working pilot setting
far enough below 10-inches w.c. (25 mbar) for
the working pilot to shutoff. Then set the standby
pilot for an outlet pressure of 10-inches w.c.
(25 mbar). Finally, set the working pilot for an
outlet pressure of 11-inches w.c. (27 mbar).
Table 6 shows how close the standby pilot can be
set to the working pilot setting.
4. Completely open the downstream block valve.
5. Slowly close the bypass valve, if any.
Working Monitor (Figure 7)
Installation
1. For both working monitor regulator and
working regulator, perform the Standard Single-
Pilot Regulator Installation section through step 6.
2. Connect another downstream pressure control
line and hand valve (Figure 7) to the monitoring
pilot according to the monitoring pilot instruction
manual. Attach a 1/2-inch NPT pressure control
line and hand valve from the intermediate
pressure pipeline to the working monitor regulator.
Pipe supply pressure between the monitoring pilot
and the working monitor regulator according to the
monitoring pilot manual.
For two typical monitoring pilots, Table 7 gives
the spread between normal distribution pressure
and the minimum pressure at which the working
monitor regulator can be set to take over if the
working regulator fails to open.
Startup
SAFTEY SHUTOFF 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
MONITORING PILOT INFORMATION
MINIMUM PRESSURE AT WHICH
WORKING MONITOR
REGULATOR CAN BE SET
Construction Spring Range Spring Part Number
Type 161AYW and 150 psig (10,3 bar)
maximum allowable pilot inlet
3 to 12-inches w.c.
11 to 25-inches w.c.
(7 to 30 mbar)
(27 to 62 mbar)
1B653927022
1B537027052
3-inches w.c. (7 mbar) over normal
distribution pressure
0.9 to 2.5 psi
2.5 to 4.5 psi
4.5 to 7.0 psi
(0,06 to 0,17 bar)
(0,17 to 0,31 bar)
(0,31 to 0,48 bar)
1B537127022
1B537227022
1B537327052
0.5 psig (0,03 bar) over normal
distribution pressure
Type 627-109 and 150 psig
(10,3 bar) maximum allowable pilot
inlet for cast iron body or 750 psig
(51,7 bar) maximum allowable pilot
inlet for malleable iron or steel body
5 to 20 psig
15 to 40 psig
35 to 80 psig
(0,34 to 1,38 bar)
(1,0 to 2,8 bar)
(2,4 to 5,5 bar)
10B3076X012
10B3077X012
10B3078X012
3.0 psig (0,21 bar) over normal
distribution pressure
70 to 150 psig
130 to 200 psig
(4,8 to 10,3 bar)
(9,0 to 13,8 bar)
10B3079X012
10B3079X012
5.0 psig (0,34 bar) over normal
distribution pressure
Table 7. Working Monitor Performance
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