A.O. Smith Cyclone BFC-28, Installation, User And Service Manual

Page: 42 / 104

Installation
40 Instruction manual BFC
3
is
Gas control valve pressure adjustment
3.11.3 CO
2
adjustment
To check the CO
2
value under 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 appliance from
the power supply.
2. Carefully remove the covers from the appliance.
3. The electrical section is now visible.
4. Place the CO
2
meter's measurement probe in the test nipple (58) of the flue
gas outlet pipe (the number is a reference on the General working principle
of the water heater).
5. Open the gas supply and vent the gas supply line.
6. Use the main switch to apply mains voltage to the appliance.
7. Start (9 "Starting the water heater") the appliance.
8. Go to the
:
SERVICE OPERATION
menu.
9. Generate a heat demand by draining the appliance until it is cold or by
raising the value for
Tset
in the
SERVICE
menu. Use for this.
Full-load measurement
10. From the service menu, select:
-
SERVICE OPERATION
|
FULL LOAD
- Confirm with .
The appliance is now in "FULL LOAD mode" and will ignite.
11. The appliance is now running at
FULL LOAD
. Read the value from the CO
2
meter and wait until this measured value has remained stable for some time.
This may take several minutes.
IMD-1096b R0
SERVICE Ê Ê
FULL LOAD 65ÉC
Tset 70ÉC
RUNNING