16
How to drain the hot water cylinder
1. Turn off the main water supply to the cylinder.
2. Open a hot water tap with a position as low as possible in the building,
in order to reduce the pressure.
3. Remove the pipe connection
3 - Mains cold water in
and connect
one end of the hose pipe to the connection. Terminate the other end of
the hose to a drain or to outside. Ensure that the drain end of the hose
is at a lower level than the bottom of the cylinder. The greater the fall
on the hose, the higher the fl ow rate.
4. Disconnect
connection
4 - Domestic hot water out
.
5. Start the siphon effect by pumping or sucking at the drain end of the
hose.
6. Let the whole volume drain out.
596
69
79
198
298
471
538
Elanslutningar
506
398
470
517
280,5
494
554
568,5
5
6
3
4
2
1
Valve outlet size
Size of discharge
pipework D1
Size of discharge
pipework D2
Maximum length of
straight pipe
(no bends or elbows)
Deduct the fi gure below from the
maximum length for each bend or
elbow in the discharge pipe
22 mm
Up to 9 m
0.8 m
G1/2
15 mm
28 mm
Up to 18 m
1.0 m
35 mm
Up to 27 m
1.4 m
28 mm
Up to 9 m
1.0 m
<G3>/4
22 mm
35 mm
Up to 18 m
1.4 m
42 mm
Up to 27 m
1.7 m
35 mm
Up to 9 m
1.4 m
G1
28 mm
42 mm
Up to 18 m
1.7 m
54 mm
Up to 27 m
2.3 m
How to fl ush the system & tank
To fl ush the tank use the above proposed setup, add a hose onto the hot
water outlet position number 4 (in the above diagram) and then fl ush the
hot water tank.
>0cm
Connecting the heat pump to the heating system
