Start-up, calibration and operation of the burner
27
20019893
GB
5.4.1
Cams and trim potentiometers functions
Cam 1: 90° - Limits rotation towards maximum for gas
Cam 2: 0° - Limits rotation towards minimum, air damper closed
on stand by
Cam 3: 15° - Limits gas ignition position
Cam 4: 90° - Limits rotation towards maximum for oil
Cam 5: 15° - Limits oil ignition position
Cam 6: Adjust the 2
nd
stage oil valve firing
Cams 7 - 8: not used
5.5
Adjustments before first firing (light-oil operation)
5.5.1
Combustion head setting
The setting of the combustion head depends exclusively on the de-
livery of the burner at high fire.
Turn screw 5)(Fig. 34) until the notch shown in diagram (Fig. 35) is
level with the front surface of flange 6).
Example burner RLS 38/M
High fire burner delivery = 9.6 GPH.
If diagram (Fig. 35) is consulted it is clear that for this delivery, the
combustion head must be adjusted using notch 4, as shown in
(Fig. 35).
5.5.2
Pump adjustment
No settings are required for the pump, which is set to 174 PSI by
the manufacturer.
This pressure must be checked and adjusted (if required) after the
burner has been ignited.
The only operation required in this phase is the application of a
pressure gauge on the appropriate pump connection.
5.5.3
Fan damper adjustment
The first time the burner is fired leave the factory setting unchanged
for both low and high fire operation.
5.5.4
Ignition pilot adjustment
Place the pilot and electrode as shown in Fig. 36.
The pilot works correctly at pressures ranging from 3 - 4” WC.
WARNING
Disconnect the control power supply and the main
electrical supply to the servomotor before
performing any service functions.
Fig. 33
D10732
Model
A
RLS 28/M
2
11/64”
RLS 38/M
2
43/64”
RLS 50/M
3
55/64”
Fig. 34
D1149
Fig. 35
N
°
N
o
tc
h
e
s
Burner output in 2
nd
stage operation
D2540
A
Fig. 36
D10875
