A.O. Smith cyclone BFC - 80, Installation And Service Manual

Page: 36 / 96

Installation
36 Instruction manual BFC
3
is
Gas control
3.11.1 Preparation
To check the supply pressure and burner pressure, proceed as follows:
1. Isolate
(10.3 "Electrically isolating the appliance") the water heater from the
power supply.
2. Undo the screws of the plastic covers.
3. Carefully remove the covers from the top of the appliance. The electrical
section is now visible.
3.11.2 Procedure to check pressures
1. There are two test nipples on the gas control:
- a supply pressure nipple (1)
- a burner pressure nipple (2)
Sealing screws are located inside the test nipples. Loosen both sealing
screws by a few turns. Do not completely loosen them; they can be difficult
to re-tighten.
2. Connect a pressure gauge to the burner pressure nipple (2).
3. Open the gas supply and vent the gas supply line with the supply pressure
nipple (1).
4. Connect a pressure gauge to the supply pressure nipple (1) when gas starts
to flow from this nipple.
5. Switch on the power to the appliance using the isolator on the appliance.
6. Switch the electronic controller
ON by setting the 0/I switch to position I .
Legend
Only applicable numbers are
mentioned.
1. supply pressure test nipple
2. burner pressure test nipple
3. burner pressure regulator
4. burner pressure control cap
5. burner pressure control
adjusting screw
3
1
2
5
4
IMD-0260 R1