Maintaining The Boiler; Draining The Boiler - Vesta VRC-80 User Manual

Maintaining the Boiler

Before cleaning the boiler, make sure the boiler is turned off
and the power supply is disconnected. The boiler may remain
hot for few minutes after it is turned off. Wait until the boiler
Danger
has cooled down before cleaning to prevent burns.

Draining the Boiler

To perform maintenance tasks or to prevent the boiler from freezing
when it will not be used for an extended period, the boiler must be
drained.
To drain the boiler:
1
Press the button to turn off the boiler.
2
Disconnect the power supply to the boiler.
3
Turn of the gas valve.
4
Turn off the water supply valve on the inlet to the boiler.
Notice
If there is no water supply valve, turn off the water supply at the
water main.
Gas
Cold water Hot water
5
Close off any heating zones that do not require draining and
open a purge valve to drain the space heating side. Open all
domestic hot water faucets completely to drain the water
heating side. The water that remains in the plumbing lines will
drain out.
6
Open the drain valve.
7
Remove the strainer from the bottom of the boiler.
8
Close the drain valve when the water is completely drained.
9
Remove the cold water inlet filter.
10
Allow the residual water to drain from the boiler.
11
When the water is completely drained, reinsert the cold water.
inlet filter and close the drain valve.
Notice
Follow the steps in reverse order to refll the boiler. Be careful not
to lose a drain plug.
11
Maintaining the Boiler