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

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Installation
36 Instruction manual DR-FC
3
is
7. Switch on the power to the water heater using the isolator on the water
heater.
8. Switch the controller ON by setting the 0/I switch to position I .
The display will now show
INTERNAL CHECK
for about 10 seconds, and
will then go to the main menu.
9. Activate "ON mode" by going through the following steps:
- Press once on the blue arrow ( ) to position the cursor beside
ON
,
then press . The display shown here will appear.
- Confirm the selection
START OPERATION
with .
The water heater is now in "ON mode" and will ignite.
10. Once the display shows the text
RUNNING
you must wait about 1 minute
before reading the dynamic pressures (the fan needs this time to run up to
full rotational speed).
11. Use the pressure gauge to read the supply pressure from the test point and
check it against the value from the gas table (3.4.3 "Gas data") .
Note
Consult the mains gas supply company if the supply pressure is not correct.
You cannot yet start using the water heater. You must now take the water heater
out of service
(10.3 "Isolating the water heater from the mains") .
12. Shut off the gas supply.
13. Disconnect the pressure gauge and retighten the sealing screw in the test
point.
14. If there is nothing else you need to check or adjust, you can put the covers
back on the water heater.
3.11.2 CO
2
-adjustment
To check the CO
2
value during full load and partial load and to adjust it if
necessary, 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. Place the CO
2
meter measurement probe in the test point (58) of the flue
gas outlet pipe.
5. Open the gas supply and vent the gas supply line.
6. Use the main switch to apply mains voltage to the water heater.
INTERNAL CHECK
MENU
»OFF
^ ON
È WEEK PROGRAM
»START OPERATION
^ CHANGE SETPOINT
È Tset=65ÉC