Using The Electric Immersion Heater; Switching Off Hot Water Production; Frost Protection; Cleaning The Cylinder - Vaillant uniSTOR Operating Instructions Manual

4 Operation
i
If you are heating up water for the first time or
after a long switch-off period, the full cylinder
performance is only available following a waiting
period.
i
If the uniSTOR has been installed in a cupboard
used for airing clothes, make sure that clothing
and other objects are not placed on the cylinder,
control devices, pipes or other system compo-
nents.
i
Always make sure that there is clear access
to the cylinder to enable the use of the hot
water thermostat controller and the thermostat
mixer.
4.2

Using the electric immersion heater

2
3
1
Fig. 4.2 Using the electric immersion heater
Key
1 Switch
2 Electric immersion heater
The electric immersion heater (2) should only heat the
water if the gas-fired wall-hung boiler fails. The electric
immersion heater may not be operated at the same time
as the gas-fired wall-hung boiler.
> If the gas-fired wall-hung boiler fails, switch the electric
immersion heater on using the switch (1).
> Once the gas-fired wall-hung boiler is in service again,
use the switch to switch the electric immersion heater
off.
8
4.3

Switching off hot water production

> Switch off the gas-fired wall-hung boiler (see operating
instructions for the gas-fired wall-hung boiler) to tem-
porarily switch off the heating and hot water system.
4.4

Frost protection

Caution!
b
Risk of damage due to frost!
If the cylinder is placed out of operation for
a relatively long period of time in an
unheated room (e.g. during a winter holi-
day), the cylinder must be completely
drained.
> Contact a competent person to drain the
cylinder.
If you are absent during a relatively long period when
there is a risk of frost, make sure that you leave the cen-
tral heating on and that the temperature in the cylinder
room and in all other rooms is kept above freezing.
4.5

Cleaning the cylinder

> Clean the outside of the cylinder only with a damp cloth,
using soapy water if it is especially dirty.
Do not use abrasive cleaning agents or solvents (any
type of scouring agent, petroleum etc.) since they can
damage the cladding and the cylinder fixtures.
4.6

Temporarily taking the cylinder out of service

Caution!
b
Risk of damage as a result of the cylin-
der freezing!
Frost protection and monitoring devices are
only active while the boiler is connected up
to the power supply.
> Make sure that the cylinder cannot be
damaged if there is a frost.
> Temporarily take the cylinder out of service by switching
the boiler off.
Operating instructions for uniSTOR 0020111106_00