Preparation For Pressure Control Of Gas Control Valve; Threaded Hose Fitting For Gas Pressure Test; Gas Pressure Control By Manometer Or Slack Tube - Monitor GF3800 Servise Manual

MONITOR HEATING SYSTEM
Section 2: Installation
Instructions for Manifold Pressure Adjust-
ments
[A] Combustion, Pressure Control of Gas Control
Valve
A-1 Preparation for Pressure Control of Gas
Control Valve
1. With wrench, turn manifold test plug counter-
clockwise to remove it from the Gas Control
Valve. (See Figure A-1)
Manifold Test Plug
Figure A-1
Threaded Hose Fitting for
Gas Pressure Test
Threaded Hose
Fitting for Gas
Pressure Test
Figure A-3
3. Gas Pressure Control by Manometer or Slack
tube (See Figure A-4)
• Refer to the manometer operation manual.
Set up manometer vertically on right-hand side
of the heater surface with magnetic clips.
Check if fluid is filled up to one half of the
manometer length. If not, add fluid up to the
level.
•Attach the rubber tubing to the head of the
threaded pipe fitting. (See Figure A-5)
Magnetic Clip
2. Threaded Hose Fitting for Gas Pressure Test
(See Figure A-3)
•Take out the threaded hose fitting from the
manometer kit. Apply sealant tape around the
screw thread of the threaded hose fitting to
prevent gas leakage, as shown in Figure A-2.
Screw threaded hose fitting into the gas control
valve, in place of manifold plug.
Winding Direction
Threaded Hose Fitting
Screw Threads
Figure A-4
Figure A-2
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