Pipe Installation - OSO HOTWATER Wally Series Installation Manual

3.5 Pipe installation

The product is designed to be permanently con-
nected to the mains water supply. Approved pipes
of the correct size should be used for installation.
The relevant standards and regulations must be
followed.
CW
Product.
(conn. 1)
1/2" ext.
W 30-120
pipe thread
3.5.1 Incoming water pressure
The efficiency of the product depends on the in-
coming cold water pressure. The water pressure
should be min. 2 bar and max. 6 bar throughout the
day. Excessive water pressure can be adjusted by in-
stalling a pressure reduction valve.
3.5.2 Fitting the safety valve
The safety valve supplied must be mounted on the
cold water supply to the heater. Use the ø15 mm
ring clamp connection on the valve (4). Important:
The valve has a built-in non-return valve and MUST
be mounted with the water flow towards the heater;
see arrow on valve (6). The arrow should point to the
CW connection to the heater (1).
3.5.3 Fitting cold and hot water hoses and overflow
pipes
A) Remove the front and base cover (D) of the prod-
uct by gently pulling them off. CW and HW hoses (S)
are fitted to their respective connections and tight-
ened to the correct torque (see 3.5.4).
B) The HW hose is taken to the hot water connec-
tion to the home and tightened (see 3.5.4).
C) The CW hose is connected to the cold water con-
nection to the safety valve (5) and tightened (see
3.5.4).
D) Overflow pipe (7) > 18 mm inside run to the over-
flow on the safety valve (3);
• Connect to 1/2" outside thread.
• Permanently open and frost-free with a fall to
the drain.
All pipe connections should be checked for leakage
when water is turned on, and again after approx. 3
months of operation. Then each year. Fit covers (D)
before starting up.
3.5.4 Torque settings
Component
Hose nut on CW/HW connection
Hose nut to safety valve
8
HW Overflow CW supply
(conn. 2) (conn. 3)
ø15mm ring
1/2" ext. 1/2" ext.
clamp / 1/2"
pipe thread pipe thread
pipe thread
Torque
20 Nm (+/- 3)
20 Nm (+/- 3)
(conn. 4)
- +
D
1 2
S
4
6
3
7
7
5
3