STEP 2
Open the left hand access door and detach the
impulse hoses from the air pressure switch.
STEP 3
Remove the four screws holding the burner
head onto the burner assembly.
The burner head can now be detached by
disconnecting the impulse tube and the burner
head wiring.
STEP 4
Detach the two screws holding the front of
the gas valve.
STEP 5
Remove the four screws holding the rear burner
plate in position. Remove the rear plate.
The jet carrier, gas inlet, and harness can
now be detached from the gas valve.
STEP 6
The two screws retaining the gas valve can
then be removed.
STEP 7
The gas valve can now be replaced.
Ensure the correct type of gas valve is used,
see Section 5.1 for more details.
Refit all components in reverse order.
Set gas pressures to data badge or as per
section 1.12 on page 21 and ensure reli-
able burner performance.
Test product and close access doors.
STEP 2
Remove the two screws attaching the control-
ler to the burner and remove.
Disconnect HT Lead from burner controller.
7.3 SIT Sigma gas valve replacement
STEP 1
Remove the burner assembly as described in
section 4.3 Servicing. Open the right hand
access door and detach the burner controller
from the wiring harness.
7.4 Burner controller replacement
(Honeywell VK valves)
STEP 1
Slacken screw in burner lid and open the right
hand burner access door.
Disconnect wiring harness from the burner
controller.
53
Summary of Contents for VS15LHE8
Page 34: ...A Figure 41 Vision Heater Assembly Models VSUTE VSUHE 15kW 76mm 3ins Nom Dia 34...
Page 35: ...A A Figure 42 Vision Heater Assembly Models VSUTE VSUHE 20 25kW 76mm 3ins Nom Dia 35...
Page 36: ...Figure 43 Vision Heater Assembly Models VSUTE VSUHE 30 35kW 100mm 4ins Nom Dia 36...
Page 37: ...Figure 44 Vision Heater Assembly Models VSUTE VSUHE 40kW 100mm 4ins Nom Dia 37...
Page 38: ...Figure 45 Vision Heater Assembly Models VSUTE VSUHE 45 50kW 100mm 4ins Nom Dia 38...
Page 39: ...A Figure 46 Vision Heater Assembly Models VSLIE VSLHE VSDLE 15 25kW 8m 76mm 3ins Nom Dia 39...
Page 40: ...A Figure 47 Vision Heater Assembly Models VSLIE VSLHE VSDLE 20 25kW 10 5m 76mm 3ins Nom Dia 40...
Page 41: ...Figure 48 Vision Heater Assembly Models VSLIE VSLHE VSDLE 30 35kW 10 5m 100mm 4ins Nom Dia 41...
Page 43: ...Figure 50 Vision Heater Assy Models VSLIE VSLHE VSDLE 35 40 45 50 kW 16m 100mm 4ins Nom Dia 43...
Page 59: ...Notes 59...