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aXis CONTROLLER HOME STANDBY GENERATOR
INSTALLATION
24
FUEL PIPE SIZING CHART
NOTICE
Reduced pipe size will affect fuel delivery and performance.
Measure the pipe length from the generator fuel inlet to the
primary gas pressure regulator.
Pipe Length* NG LPG
25 ft (8 m) 3/4 in. NPT 3/4 in. NPT
50 ft (15 m) 1 in. NPT 3/4 in. NPT
100 ft (30 m) 1 in. NPT 1 in. NPT
150 ft (46 m) 1-1/4 in. NPT 1 in. NPT
200 ft (61 m) 1-1/4 in. NPT 1 in. NPT
* Add 2.5 ft (0.76 m) per bend, tee or angle in the pipe line to overall distance, for
each 90 degree elbow, add 8 feet (2.4 m) to the overall measurement.
5. CONVERTING TO LPG
The engine is fitted with a dual Master Mixer Assembly (carburetor
system), which allows the HSB to run on either NG or LPG. It has
been configured at the factory to run on NG. If your installation
requires to run on LPG, an orifice in the Master Mixer Assembly
(carburetor system) must be changed. The LPG orifices are
shipped with the HSB.
Jet Change Procedures
1. Remove breather tube (1) by loosening breather tube clamp
(2).
2. Remove fuel inlet chamber screws (3). Remove fuel inlet
chamber (4) along with fuel hose (5) and gasket (6).
3. Remove left side main jet (7), right side main jet (8), left side
slow jet (9) and right side slow jet (10). Recommend tool
for removing main jet: Special Tool (Part number 100908).
Recommend tool for removing slow jet: Driver Bit, 7/32 Slot -
Flat Head
4. Install LPG jets and gasket (6) to fuel inlet chamber.
– Left side main jet: Size #410 (11)
– Right side main jet: #430 (12)
– Left side slow jet: Size #130* (13)
– Right side slow jet: #120* (14)
– Main Jet Tightening Torque: 34.7 lb.-in (3.92Nm)
– Slow Jet Tightening Torque: 17.3 lb.-in (1.96Nm)
* No slow jet required for NG.
5. Install fuel inlet chamber to mixer body. Tighten fuel inlet
chamber screws (3). Screw Tightening Torque: 26.0 lb.-in
(2.94Nm).
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