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5 Installation
5.2
Hydraulic connection
Caution.
Risk of damage caused by heat transfer
when welding.
The heat that is transferred during welding
may damage the cylinder and its components
as well as the connection seals.
▶
Protect the product and its components.
▶
Do not weld the connection pieces if these
have been screwed into the pipe fittings.
Caution.
Risk of material damage by drilling
through the product.
The product may be damaged by drilling
work.
▶
Do not drill through the product.
Caution.
Risk of material damage to the cylinder.
If an unvented hot water cylinder is fitted at
a high level (eg, loft space), potential dam-
age to the cylinder may occur if the correct
method of draining is not followed.
▶
In certain circumstances and at the dis-
cretion of the installer, install a WRAS ap-
proved automatic air vent on the hot water
outlet at the highest point.
7
6
5
4
3
2
1
1
Cylinder heating return
2
Heating flow from the
heat pump
8
8
9
10
11
12
13
3
Heating circuit heating
flow
4
3-port motorised valve
5
Cylinder heating inlet
6
Temperature and pres-
sure expansion relief
valve
7
Domestic hot water
outlet
8
Safety group
5.2.1
Connecting the product to the brine circuit
1.
Connect the brine circuit to the inlet (5) and the outlet
(1).
–
Minimum diameter of the copper pipe: ≥ 28 mm
Note
Ensure that the distance between the heat
generator and the product is as small as pos-
sible in order to prevent heat losses.
Installing the 3-way motorised valve
B
2.
Connect AB to the heating flow on the heat pump (2), B
to the flow on the heating circuit (3), and A to the heat-
ing inlet on the cylinder (5).
3.
The 3-way motorised valve can be installed vertically or
horizontally. For horizontal installation, align the valve
head so that it is facing upwards.
5.2.2
Installing the drain valve
The drain valve must be supplied by the customer.
Install the drain valve at the height of the cold water supply
or further below this level.
5.2.3
Installing the safety group
Caution.
Excessive pressure in the domestic hot
water cylinder
Excessive pressure in the domestic hot water
cylinder may cause the cylinder to burst.
▶
Ensure that the expansion relief valves
are not blocked.
▶
Ensure that there is no isolation valve
between the safety group and the cylin-
der.
Installation and maintenance instructions uniSTOR HP 0020221300_04
9
Tundish
10
Expansion vessel
11
Dry pocket for the tem-
perature sensor
12
Cold water inlet
13
Drain valve
I N
M A
E N
O P
T O
A U
A
A B
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