
3
gauge connection is 1/8 inch BSP (parallel
thread; not tapered). Start heater, read the air
pressure value and compare to the air pressure
(at right) required for your model. If adjustment
of air pressure is required, loosen the hex nut at
the Air Vent Hole and turn the pressure
adjustment screw (2) with a 5/32 inch or 4mm
hex key or allen wrench. Turn the pressure
adjustment screw clockwise to increase or
counterclockwise to decrease the pressure.
Tighten the hex nut and remove the hex key from
the adjustment screw. Check the pressure
shown on the pressure gauge again and repeat
the procedure as required to obtain the correct
air pressure
.
Model
Air Pressure (psi)
JAZ 42
4.8
JAZ 80
4.1
JAZ 80 W
4.1
JAZ 125
5.1
JAZ 160
5.5
Electrical
Inspect all internal wiring, electrical parts and
connections. Clean or replace parts as needed.
8. Wiring Diagram
10. Troubleshooting
AIR VENT
HOLE
PRESSURE
GAUGE PORT
1/8” BSP
Fig. 10
PRESSURE
ADJUSTMENT
SCREW