State Water Heaters SCE 65-400, Инструкция по установке, эксплуатации и обслуживанию

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Installation
40 Instruction Manual SCE
3
is
To check the supply pressure and burner pressure, proceed as follows:
1. Disconnect the appliance from the mains. See paragraph
’7.3.2 Disconnecting the appliance from the mains’ .
2. There are two test nipples on the gas control ( Figure 3.11 ). The test nipple
f
is used for checking the supply pressure. The other test nipple on the gas
control is not used. The manifold test nipple
h
is used for measuring the
burner pressure.
Sealing screws are located inside the test nipples. Undo both sealing screws
by a few turns. Do no completely undo them; otherwise it is awkward
retightening them.
3. There are two test nipples on the gas control
h
.
4. Open the gas supply and vent the gas pipe supply via test nipple
f
.
5. Connect a manometer to the top test nipple
f
as soon as gas starts to come
out of this nipple.
6. Switch on the voltage to the appliance using the main switch on the appliance.
7. Switch the control thermostat to its highest setting and put the appliance into
operation by switching the O/I switch to position I .
8. The warm-up cycle starts and the burner
tray
will ignite after a short time.
9. After the burner bed has ignited, you have to wait for approximately 1 minute
before you can read the dynamic pressures.
10. Use the manometer to read the supply pressure at the test nipple
f
View
Table 3.9 .
n
Remark
Consult the manager of the gas mains supply if the supply pressure is not
correct.
11. Use the manometer to read the burner pressure at the manifold test
nipple
h
. View Table 3.9 . Table 3.5
Table 3.9 Conversion data for appliance category II
2H3+
DESCRIPTION Unit SCE
80-115 SCE
80-140 SCE
80-180 SCE
95-199 SCE
95-260 SCE
70-360 SCE
65-400 SCE
65-500
Data natural gas, gas category 2H
Diameter of injectors mm 2.90 3.20 3.20 3.30 2.95 3.20 3.30 3.90
G20
Supply pressure mbar 20 20 20 20 20 20 20 20
Burner pressure mbar 8.5 8.6 7.8 8.5 8.5 9.2 7.8 11.5
Data on LP gas, gas category 3+
Diameter of injectors mm 1.60 1.70 1.60 1.75 1.50 1.70 1.75 2.25
G30 (butane)
Supply pressure mbar 30 30 30 30 30 30 30 30
Burner pressure
(1)
mbar - - - - - - - -
G31 (propane)
Supply pressure mbar 37 37 37 37 37 37 37 37
Burner pressure
(1)
mbar - - - - - - - -
1. If using a flat sealing plate or high-low control program, the burner pressure is adjusted so that it is the same as the supply pressure.
In practice however the burner pressure will be lower.