AERCO BMK 6000 Dual Fuel - Manual (Page 103)

Benchmark 6000 DF Installation, Operation & Maintenance Manual
CHAPTER 7 – MAINTENANCE
OMM-0096_0B AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 103 of 219
GF-141
Ph.: 800-526-0288
03/21/2014
Figure 7-3. Pilot Regulator Mounting Location
7.5.2 Pilot Regulator Pressure Calibration
The instructions in this section apply to both the Natural Gas and Propane gas trains.
If either the Natural Gas or Propane Pilot Regulator pressure is above 5.0”W.C. or below 4.0”
W.C., the Pilot Regulator pressure must be calibrated using the following procedure:
Pilot Regulator Pressure Calibration Procedure
1. Ensure that gas supply shut-off valve upstream of the unit is still turned OFF.
2. Turn OFF electrical power to the system.
3. Remove the pipe plug from the 1/4” NPT port on the outlet side of the Pilot Regulator
(Figure 7-3) and insert a NPT-to-barbed adapter fitting.
4. Attach one end of the plastic tubing to the barbed fitting and the other end to the 16” W.C.
manometer.
5. Remove the cap from the Pilot pressure regulator and rotate the regulator adjustment
(beneath cap) clockwise (CW) to its highest possible pressure setting.
6. OPEN the main gas supply upstream of the unit.
PROPANE PILOT
SOLENOID VALVE
NATURAL
GAS
TEE with 1/4"
PLUG
(Install
manometer
here for Pilot
Regulator test)
GAS
INLET
TO AIR/FUEL
VALVE
PROPANE
TEE with 1/4" PLUG
(Install manometer
here for Pilot
Regulator test)
NATURAL GAS
PILOT SOLENOID VALVE
PROPANE
PILOT
REGULATOR
NATURAL GAS
PILOT
REGULATOR