Installation
36
Instruction manual DR-RS
3
is
To check the supply pressure and burner pressure, proceed as follows:
1. Disconnect the water heater from the power supply. See paragraph
7.3.2 Isolate the water heater from the power supply
2. There are two test nipples on the gas control (
):
-
;
-
.
Sealing screws are located inside the test nipples. Loosen both sealing
screws by a few turns. Do not loosen them completely; this makes them
difficult to tighten again.
3. Connect a pressure gauge to burner pressure test nipple
n
Remark
All gas pipes should be vented and free of leakage.
4. Open the gas supply.
5. Connect a pressure gauge to test nipple
6. Switch on the power to the water heater using the isolator on the water
heater.
7. Set the control thermostat to the highest position and start the water heater
running by putting the On/Off switch to
position I
.
8. The heating cycle will start and the burner tray will ignite after a short time.
9. After the burner tray has ignited, wait for approximately 1 minute before you
start reading the dynamic pressures.
10. Use the pressure gauge to read the supply pressure at the test nipple
.
Refer to
.
n
Remark
Consult the mains gas supply company if the supply pressure is not correct.
Gas control valve for DR-RS 105
Figure 3.11
Gas control valve(Continued)
IMD-0257
