Mechanical Installation
www.DaikinApplied.com 11
IM 971-3 • MAVERICK I
LP Conversion
DANGER
This unit is equipped at the factory for use with natural gas only. Conversion
to LP gas requires a special kit supplied by the distributor or manufacturer.
Mailing addresses are listed on the furnace rating plate, parts list and
warranty. Failure to use the proper conversion kit can cause fire, carbon
monoxide poisoning, explosion, personal injury, property damage, or death.
Convert the unit to use liquefied petroleum (LP) gas by
replacing with the gas valve supplied in the conversion kit.
The LP gas valve maintains the proper manifold pressure for
LP gas. The correct burner LP orifices are included in the kit.
IMPORTANT:
To remove the natural gas valve, remove the
four screws securing the manifold pipe to the burner tray.
Remove the manifold pipe with gas valve attached.
NOTE:
Order the correct LP conversion kit from the furnace
manufacturer. See Conversion Kit Index shipped with
unit for proper LP kit number. Furnace conversion to
LP gas must be performed by a qualified technician.
Adjusting or Checking Furnace Input
Table 6: Line Pressure by Gas Type
Gas Type
Line Pressure (in wc)
Manifold Pressure
Natural Gas
5 – 10.5
3.5
LP Gas
11–13
10
Supply and manifold pressure taps are located on the gas
valve body 1/8" N.P.T. and on the manifold.
Use a properly calibrated manometer gauge for accurate gas
pressure readings.
Only small variations in the gas flow should be made by means
of the pressure regulator adjustment. Furnaces functioning
on LP gas must be set by means of the tank or branch supply
regulators. The furnace manifold pressure should be set at 10"
W.C. at the gas control valve.
To adjust the pressure regulator, remove the regulator cap
and turn the adjustment screw clockwise to increase pressure
or counterclockwise to decrease pressure.
Then replace the
regulator cap securely .
Any necessary major changes in the gas flow rate should be
made by changing the size of the burner orifices. To change
orifice spuds, shut OFF the manual main gas valve and
remove the gas manifold.
For elevations up to 2,000 feet, rating plate input ratings apply.
For high altitudes (elevations over 2,000 ft.), contact Daikin
Parts. see conversion kit index 92-21519-XX for derating and
orifice spud sizes.
Check of input is important to prevent over-firing of the furnace
beyond its design-rated input. NEVER SET INPUT ABOVE
THAT SHOWN ON THE RATING PLATE. Use the following
table or formula to determine input rate.
Cu. Ft. per Hr. Required =
Heating Value of Gas (BTU/CuFt) × 3600
Time in Seconds for 1 Cu.Ft. of Gas
Summary of Contents for Maverick I MPSA07D
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