A.O. Smith 30 - Manual (Page 44)

Installation
44 Instruction manual SGS
3
is
3.13.1 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.
3.13.2 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.
The display will now show INTERNAL CHECK for about 10 seconds and
go to the main menu.
INTERNAL CHECK
MENU
»OFF
^ ON
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