DORCHESTER DR-FC 120, Installation, Comissioning And Maintenance Instructions

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Instruction manual DR-FC 39
is
Note
Turning to the left (anticlockwise) means less gas (lower CO
2
level) and
turning to the right (clockwise) means more gas (higher CO
2
level).
24. Remove the CO
2
measurement probe from the test point of the flue gas
outlet pipe.
25. Put the cap back on the flue gas outlet test point.
26. Shut off the gas supply.
27. Replace the covers.
3.11.3 Switching pressure measurement
To measure the switching pressure, proceed as follows:
1. Isolate
(10.3 "Isolating the water heater from the mains") the water heater
from the power supply.
2. Carefully remove the covers from the water heater.
3. The electrical section is now visible.
4. Remove the black caps from the pressure switch test point
5. Connect the + of the pressure gauge to the H of the pressure switch test
point.
6. Connect the - of the pressure gauge to the L of the pressure switch test point
7. Zero the pressure gauge.
8. Start
(9 "Starting the water heater") the water heater.
9. The water heater will now run through the operating cycle (2.3 "Water heater
operating cycle") .
Legend
1. test point
2. adjusting screw
IMD-0763 R0
1
2