Shutting Down; Introduction; Decommissioning The Water Heater For A Short Period; Isolating The Water Heater From The Mains - A.O. Smith BFC-28 Installation, User And Service Manual

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10

10.1 Introduction

This chapter describes:
• Decommissioning the water heater for a short
period.
•

Isolating the water heater from the mains;

• Decommissioning the water heater for a long
period.
10.2 Decommissioning the water heater for
a short period
To decommission the water heater for a short period,
you must activate the frost protection.
The frost protection will prevent water from freezing in
the water heater.
Activate the frost protection as follows:
1. Press button to select the main menu.
2. Using and , place the cursor beside OFF.
Confirm with .
OFF
13:45 Thursday 6ÉC
FROST PROTECTION
ACTIVATED
The frost protection cuts in when the water
temperature drops below 5°C. The text FROST will
then appear on line one of the display. The water
heater will heat the water to 20°C (T
dropping back to mode OFF.
Note
These values of 5°C and 20°C cannot be adjusted.
Caution
The anode protection remains active when the
OFF mode is selected.
Note
If the water heater is not used for longer than two
months and the water is not drained, air bubbles may
form in the water heater. This can lead to air in the
water pipes.
Instruction manual BFC

Shutting down

10.3 Isolating the water heater from the
The water heater may only be isolated from mains
power in the correct way. The correct procedure is as
follows:
1. Activate the MENU with
2. Position the cursor in front of OFF.
3. Confirm OFF with
MENU
^ ON
È WEEK PROGRAM
damage to the water heater.
4. Wait until the fan has stopped. The
5. Switch the water heater OFF (position 0) using
6. Isolate the water heater from the power supply by
and the electricity mains to 0 will switch off the power
) before
set
supply to the potentiostat; there is then no longer any
anode protection.
10.4 Decommissioning the water heater for
Drain the water heater if you are decommissioning it
for a long period. Proceed as follows:
1. Isolate the water heater from the power
2. Shut off the gas supply.
3. Close the stop valve in the hot water pipe.
4. Close the supply valve of the protected cold supply
5. Open the drain valve
6. Bleed the water heater (or installation) so that it
mains
»OFF
Caution
Failure to wait until the fan stops can cause
dimmed.
the ON/OFF switch on the control panel.
setting the isolator between the water heater and
the mains power supply to position 0.
Note
Setting the main switch between the water heater
a long period
supply (10.3 "Isolating the water heater from the
mains").
set-up.
drains completely.
.
.
icon is then
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