Use And Maintenance; Gas Valve - Sime MURELLE HE 25 BF Manual De Instrucciones

4

USE AND MAINTENANCE

4. 1 ADJUSTMENT OF
ES
D.H.W. FLOW RATE
PT
To adjust the D.H.W. flow rate, use the flow
rate adjuster (5 fig. 4).
Remember that the flow rates and corre-
GB
sponding temperatures of use of hot water,
given in section 1.3, have been obtained by
positioning the selector of the circulation
pump on the maximum value.
Should there be any reduction in the
D.H.W. flow rate, the filter installed on the
inlet to the divertor valve (3 fig. 4) will
need cleaning.
4.2

GAS VALVE

The boiler is supplied as standard with a
gas valve, model SIT 848 SIGMA (Fig. 16).
4.3 GAS CONVERSION (fig. 17)
This operation must be performed by
authorised personnel using original Sime
components.
To convert from natural gas to LPG or vice
versa, perform the following operations
–Close the gas cock.
–Replace the nozzle (1) and the gasket (2)
using those supplied in the conversion kit.
–Test all the gas connection using soapy
water or special products. Do not use
open flames.
–Apply the nameplate with the new gas
flow layout.
–Calibrate the maximum and minimum
pressures of the gas valve following the
instructions provided in paragraph 4.3.2.
4.3. 1 New fuel configuration
For access to the installer's parameters,
press simultaneously keys
5 seconds (3 fig. 12).
The parameters will scroll up and down
with the keys and
will show the values of the parameter PAR
1. If the boiler is a 25 BF methane (G20)
model, SET 3 will be displayed:
To change the fuel to propane (G31), it is
necessary to set SET 9, by pressing the key
.
The standard display will automatically
return after 10 seconds.
90
4
3
2
1
The table below shows the SET settings to
enter when the type of gas fuel is changed.
GAS
and for
METHANE
(G20)
. The display pane
PROPANE
(G31)
-
4.3.2
Measure the CO
analyzer.
5
6
MODELS PAR 1
12 BFT 1
20 BFT 2
25 BF - BFT 3
30 BF - BFT 4
35 BF - BFT 5
12 BFT 6
20 BFT 7
- 8
25 BF - BFT 9
- 10
30 BF - BFT 11
35 BF - BFT 12
- -
- -
- -
- -
- -
- -
- 26
Calibrating the gas valve
pressures
values with a combustion
2
KEY
1 Upstream pressure intake
2 Intermediate pressure intake
3 Air signal inlet (VENT)
4 Downstream pressure intake
5 Capacity step
6 OFF-SET
1
2
Sequence of operations:
1) Press and hold the button down for a
.
few seconds
2) Press the button for a few seconds
3) Identify the CO values at max. power by
2
adjusting the shutter (5 fig. 16):
MAX power
CO (Methane) CO (Propane)
2 2
9,0 ±0,3 10,0 ±0,3
4) Press the button for a few seconds
5) Identify the CO values at min. power by
2
adjusting the OFF-SET regulation screw
(6 fig. 16):
MIN power
CO (Methane) CO (Propane)
2 2
9,0 ±0,3 10,0 ±0,3
6) Press the buttons several times to
check the pressures and
ge them if required.
7) Press the button once more to quit
the function.
Fig. 16
Fig. 17
.
.
chan-