7
Tail lengths from wall
Above
Below
Cold feed in
202
242
Hot water out
274
314
Balanced cold water out
188
228
No. Description
Dim.
1
Domestic hot water outlet (DHW out)
ø22 mm
2
Balanced cold water connection (Bal. CW) ø22 mm
3
Cold water main supply inlet (CW in)
ø22 mm
4
Line strainer
-
5
Pressure reducing valve - 3 bar
-
6
Expansion relief valve - 8 bar
1/2”
7
Hot water blending valve
-
8
Temp&pressure relief valve - 90°C / 10 bar
1/2”
9
Flexible hose and T-piece (120-250 l. only)
-
10
Expansion vessel(s) (120-250 l. only)
-
11
Flexible Y-hose
-
12
Tundish
-
13
Expansion vessel connection point
1/2” BSPM
1 2
3
5
7
8
11
12
13
6
10
10
9
4
2.7 Preliminary wiring
Before final installation and pipe fitting it is recom-
mended to feed the electrical wires to the electri-
cal box. The OSO Super SX is provided with two
channels in the base to feed electrical cables to
the cylinder. The channels run diagonally from the
front centre to the rear left and right, and ensures
a neat installation with minimum visible cabling.
When the cylinder is moved into position remove
the electrical box covers. The power cables should
be fed up from the base channels into the electri-
cal box. When cables are connected they must be
secured using the cable clamp (1) supplied in the
fittings bag.
Use only a suitable heat resistant round cable
with a minimum rating of 90°C compliant to BS
EN 50525-1, for example H05V2V2-F (309-Y) ac-
cording to BS EN 50525-2-11. Cables should be
sufficient length to reach from the junction box
through the base channels and leave an amount of
tail from the front of the cylinder sufficient to reach
the electrical connection point.
For more information about electrical installations
see chapter 4. ELECTRICAL INSTALLATION.
2.8 Pipework
The OSO Super SX has all pipework connections
at the top of the cylinder with these pipes secured
to the rear wall. A template is provided to assist in
the placement of these pipes. Decide where the
cylinder is to be positioned and secure the wall
template with the cross on the back wall at least
326 mm from the left wall.
Ensure the cylinder feet are wound out to pro-
trude correct amount. Refer to included template
to position the cross at the correct height above
the base for the appropriate capacity of the cyl-
inder. Please note that if the cylinder is raised on
its feet or on a plinth higher than floor level, the
height of the template above the floor will need
to be raised accordingly.
The connecting pipe tails should be fitted so they
reach out away from the back wall horizontally,
perpendicular to the wall and parallell with each
other. The table below shows the exact lengths
these tails should be cut from wall to reach the
cylinder connections. If pipes are clipped up the
back wall behind the cylinder position, the tails
should be longer. Use the lengths marked ‘be-
low’. If the pipes approach the template points from
above/side, use the lenghts marked ‘above’.
OSO recommend that the discharge pipe should be
located at the left side of the cylinder.