Cylinder Specifications; Preparation Of Installation Area - OSO Super S Installation Manual

2. Cylinder Specifications

F . 1
ig
r
ear
Important: 120-250 l. units are factory fitted with expansion vessels (E) and flexible hose and T-piece (F). The 300 l. is supplied with a separate
expansison vessel and flexible hose for fitting on the wall next to the unit. The flexible hose for the 300 l. is to be fitted to connection point (K).

3. Preparation of installation area

3.1 Pipework.
The OSO Super S 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 (using supplied adhesive) with the cross on the back wall at least 326mm from the left wall. Refer to table
C to position the cross at the correct height above the base for the appropriate capacity of the cylinder. Please note that if
the cylinder will be raised on its feet or on a plinth/higher flooring level, the height of the template above the floor will need
to be raised by an equivalent amount.The connecting pipe tails should be fitted so they reach out away from the back wall
horizontally, perpendicular to the wall and parallel with each other. Table B 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 "below". If the pipes approach the template points from above/side, use the lengths
marked "above". OSO recommend that the discharge pipe should be located at the left side of the cylinder.
T b
able
Tail lengths
from wall/mm
Cold feed in
Hot water out
Balanced cold out
Primary flow & return
3.2 Electrical connections.
The OSO Super S is provided with two channels in the base to lay electrical cables to the cylinder. The channels run
diagonally from the front centre to the rear left and right and allow the installation to be neat with minimum visible cabling. Two
heat resistant 1.5 mm triple core cables are required for each cylinder (only one for SX 120).
Cables should be sufficient length to reach from the junction box, through the base channels and leave the amount of tail
from the front of the cylinder shown in table C to be able to reach the electrical connections. When the cylinder is moved
into position the cables should be fed up another channel behind the casing at the front of the cylinder into the electrical
box. Cables for upper immersion heaters on direct units continue through this box to a higher channel leading to the upper
electrical box. When cables are in place they can be secured using the cable clamp supplied in the fittings bag.
F
ronT
T
Above Below
202 242
274 314
188 228
238 278
C
able
+
Capacity above Cable tail - indirect (SC) and
base/mm lower element direct (SX) / mm ment of direct (SX) / mm
120 755
150 935
180
1045
210 1185
250 1435
300 1635
A Pressure reducing valve 3 bar
B Expansion relief valve 8 bar
C
Temp.&pressure relief valve 90°C /10 bar
D Hot water blending valve
E Expansion vessels (120-250 l. only)
F Flexible hose and T-piece (120-250 l. only)
F . 2
ig
G Tundish
H Flexible Y-hose
J
Primary flow
K Expansion vessel connection point
L Line Strainer
M Cold water main supply inlet (CW in)
N Balanced cold water connection (Bal. CW)
P Domestic hot water outlet (DHW out)
R Primary return
Cable tail for upper ele-
550
550
550
550
550
550
E
J
P
N
M
R
-
810
910
1040
1170
1335
3