Appendix C Gas Valve
C-33
Protective slide
After setting the required pressure
setpoint:
1. Close pr otective slide.
2. Secur e protective slide closed
position with a screw
1
Metric
Allen ke
y no. 2.5
2
Outlet Pressure Adjustment
Metric
Allen key
no. 2.5
3
MBC...SE S22/82/302
• O pen protective slide located at the bottom of the valve.
• S ee Fig. 1 & 2 for adjustments.
1. M
2. Using a 2.5 mm Metric Allen key, adjust the outlet pressure to the gas
regulator for the application.
Turning the adjustment towards lower numbers decreases the outlet
pressure.
Turning the adjustment towards higher numbers increases the outlet
pressure.
3. Verify that the outlet pressure and the products of combustion are within
MBC...SE S02 & MBC N
1. O pen protective slide located at the bottom of the valve.
2. S
3. S
NOTE: There will be a slight delay between the adjustments and the re -
NOTE: M
versa. Therefore, modulate the equipment up and down at least
after making adjustments.
High Fire setting using Shutter
1. W
2. Use a slotted screwdriver to adjust the gas/air ratio concentration for the
application.
T
T
3. Verify that products of combustion are within the operating range as
Low Fire setting using MBC regulator
1. W
• I
• T he min imum negative signal to zero gover nor must b e at least - 0.2 ”WC.
• NOTE:
pressure. This will be a negative pressure/vacuum signal.
2. U
air ratio concentration for the application.
Turn the adjustment towards the – symbol to decrease the outlet pres -
sure.
Turn the adjustment towards the + symbol to increase the outlet pressure.
3. Verify that products of combustion are within the operating range as
Read all instructions in this manual before installing. Per -
form s teps in the order given. Have installed and s erviced/
inspected by a q s ervice technician, a t least annually.
Failure to c omply could result in s evere personal injury, death
or substantial property damage.
A c alibrated ue gas analyzer must be utilized to properly
adjust appl iances featuring DUNGS MB C co ntrols. F ailure to
properly apply a ue gas analyzer c an result in c arbon monoxide
emissions c ausing s evere personal injury, death or s ubstantial
property damage.
Failure to follow all instructions c an result in c arbon mon -
oxide emissions causing severe personal injury or death.
Shutter ange
MBC regulator
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