Protherm 100 Manual for instruction and use - page 16
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row in the adjusting valve a flat screwdriv-
er and turn it by 180°. When running the
boiler on propane gas, the arrow must be
pointing in the direction of gas flow. When
running the boiler on natural gas, the ar-
row must be pointing in the opposite direc-
tion to gas flow.
7. When converting the boiler from natu-
ral gas to propane gas, disconnect the
modulator connector.
8. Connect the boiler to power supply
9. Open the gas supply valve before the
boiler.
10. Set the boiler output as described on
page X.
11. Check all gas route joints for leaks
and implement the following safety meas-
ures:
– stick a label in a suitable way right on
the boiler, showing on what type of fuel
the boiler now runs,
– record the change, and the name of the
person who made it in the boiler’s ac-
companying technical documentation.
When converting the boiler, use only origi-
nal manufacturer-supplied or authorised
parts. When converting to a different type
of fuel, the requirements on the design of
threaded joints for the gas pipes inside the
boiler must be respected, i.e. they must be
sealed only with suitable material for the
installation, and resistant against the used
type of fuel. Safeguard the settings of all
elements for instance by applying a drop
of paint.
65 - 100 KLO / KLO EKO Standard –
Natural Gas (65 KLO/KLO EKO
propane)
1. Remove the gas inlet pressure measur-
ing point screw on the gas valve and at-
tach a pressure gauge (U-tube) to it. The
natural gas supply pressure should not be
lower than 2 kPa.
2. To reduce the supply pressure, tighten
the measuring point screw.
3. Attach a pressure gauge (U-tube) to
the outlet gas measuring point on the gas
valve.
4. Start up the boiler.
5. Let the operating pressure on the burn-
er stabilise for a while before starting the
adjustment.
6. Fold the HIGH/LOW modulator plastic
cover.
7. Check the appropriate high and low out-
put against the table provided.
8. Using the HIGH/LOW switch set the
boiler to nominal output (two flames).
9. Insert an 8 mm spanner on the gas valve
modulator nut and by turning it clockwise
or anticlockwise adjust the boiler’s nomi-
nal output.
10. Check the pressure gauge (U-tube)
reading.
11. Set the HIGH/LOW switch to the posi-
tion LOW (one flame).
12. Adjust the output using the screw on
the modulator, using a 3.5 mm wide flat
screwdriver.
13. Check the output setting
14. Make sure that all measuring points
are properly secured and no gas leaks
from them.
130 – 150 KLO / KLO EKO Standard
– Natural Gas
These models are equipped with a pair
of Honeywell or SIT electromagnetic gas
valves.
1. Remove the gas inlet pressure measur-
ing point screw on the gas valve.
2. Using a pressure gauge (U-tube),
measure the gas pressure supplied to the
boiler. The value should not be lower than
2 kPa.
3. Replace the measuring point screw.
4. Remove the gas outlet to the burner
pressure measuring point and attach a
pressure gauge (U-tube) to it. The meas-
Table 3:
Gas valves used by the model
Model
Type of gas valve
Producer / number of valves
65 KLO / KLO EKO - PROPAN
sigma 843, sigma 840
Sit / 2
65 - 100 KLO / KLO EKO - ZP
sigma 843, sigma 840
Sit / 2
130 - 150 KLO / KLO EKO - ZP
VR 400 B+B high - low
Honeywell / 1
130 - 150 KLO / KLO EKO - ZP +
proof of gas-tightness
VR 400 B+B high - low + valve VE
408 AA 1007 for operator burner
Honeywell / 1 + 1 (operator bur-
ner)
For all models is used the automatic ignition system 4560 B 1055 (TS 50 sec.)
Gas pressure settings
a
b
c
d
1
3
2
Fig. 12
Fig. 13
Fig. 14
Sigma 840
Sigma 843