Gas Pressure Control; Pre-Operation Check; Adjusting The Gas Control Valve - Monitor GF3800 Servise Manual

MONITOR HEATING SYSTEM
Section 2: Installation
Threaded Hose Fitting Rubber Tubing
Figure A-5
• Reading of the Gas pressure Valve indicated
by the Manometer. (See Figure A-6)
Adjust 0 scale to the top level of the lower fluid
height of the U-shape slack-tube and read the
scale at the top of the higher fluid height.
This scale indicates the gas pressure value.
Manometer
7
1
i
^
GF3800:
3. 15" W.C.
^ or 3.40" W.C.
, GF1800:
3. 19" W.C.
or 3.15" W.C.
Figure A-6
4. Pre-Operation Check
•Check tne gas supply line to confirm that the
supply valve of GF3800/GF1800 is open.
• Insert the plug into wall outlet and confirm the
digital display shows flashing 88:88.
Note: If flashing display is unavailable, reconfirm
correct wiring.
:
A-2 Gas Pressure Control
1. Check the Installation Method
•The gas pressure varies with different types of
installations. Before adjusting the gas pres-
sure, confirm whether the installation of the
GF3800/GF1800 was done with a standard kit
or with an extension kit.
2. Adjusting the Gas Control Valve
2-1 In the case of the Standard Installation
• Push [ON/OFF) button to start operation.
•Current room temperature will be indicated in
(ROOM] display and setting temperature will
be indicated in [SET] display.
• For high burner mode, keep pressing the (UP)
button to increase the set temperature up to
90°F, and then press the (SET) button.
• Operate the GF3800 with high burner mode for
5 minutes or more, and set the gas pressure of
the gas control valve at 3.15" W.C. or 3.40"
W.C., as instructed in Table-1.
• Operate the GF1800 with high burner mode for
5 minutes or more, and set the gas pressure of
the gas control valve at 3.19" W.C. or 3.15"
W.C., as instructed in Table-1.
In order to adjust the gas pressure, turn the
high volume knob clockwise to increase
pressure, and to decrease the pressure, turn
counter-clockwise.
Use a small screw driver to turn the knob.
(See Figure A-9)
• Press the (ECONOMY PLUS) button to
confirm the (ECONOMY PLUS) light will turn
on.
• Press the (DOWN) button to operate with low
burner mode. And decrease the set
temperature by 4*F, and then, press the (SET)
button.
•Operate the GF3800 at low burner mode for 5
minutes or more, and set the gas pressure at
1.26" W.C., as instructed in Table-1.
Operate the GF1800 at low burner mode for 5
minutes or more, and set the gas pressure at
1.42" W.C.or 1.34" W.C., as instructed in Table-1.
In order to adjust the gas pressure, turn Low
volume knob clockwise to increase pressure,
and to decrease pressure turn counter-
clockwise.
(See Figure A-9)
Note: If Manifold Pressure can not be adjusted
within the range of High/Low volume
knob VR1 (Hi)/VR2(Lo), adjust the
Adjusting Screw of Gas Control Valve at
a Low burner mode by the following
method.
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