Planning Notes - Wolf SPU-1-200 Assembly Instructions Manual

Installation
Connection to heating
equipment
Sizing of the
safety devices
Expansion tanks
3043757_201801

Planning notes

The buffer may be installed only in a frost-protected area. Otherwise, it must be emptied
in case of danger of frost.
Ice formation in the system can lead to leaks and destruction of the
tank!
The foundation must be even and able to support weight in order to carry the weight of
the tank including its water content.
The tank must be equipped with its own safety devices (safety valve, expansion tank)
if it can be disconnected from the heating system or the existing components are in-
sufficient for the additional buffer volume.
The installation of splash guards or other narrowings into the supply pipe leading to the
safety valve is not permitted.
Safety valve, heating water side
Only a component-tested safety valve may be used. The response pressure must fit
all system components and may not exceed 6 bar.
Exceeding the permissible operating pressure can lead to leaks and
destruction of the tank!
The safety valve is designed according to DIN EN 12828 and DIN1988. For each coll-
ector a thermal output of 1.5 kW is assumed:
Total thermal output
(boiler + collector)
50 kW
100 kW
200 kW
350 kW
The exit pipe must be at least equal in size to the safety valve outlet cross-section, may
have no more than 2 elbows and a maximum length of 2 m. If 3 elbows or a length up to
4 m are absolutely required, then the total exit pipe must be designed one nominal size
larger. The use of more than 3 elbows or a length over 4 m is not permitted. The exit
pipe must be installed with downward gradient. The drain pipe behind the drain funnel
must have at least twice the cross section of the valve entry. In the proximity of the
exit pipe of the safety valve, a warning label must be attached with the following text::
"During heating, water exits from exit pipe for safety reasons! Do not
NB
plug the pipe!"
All expansion tanks are to be arranged so that they can be isolated from the heating
system.
Shut-off devices must be sufficiently secured against unintentional closure (e.g. cap
valve secured with wire and lead seal).
Diaphragm expansion tanks must correspond to DIN EN 13831.
Expansion tanks are to be installed in frost-free rooms or protected against freezing.
Expansion tanks are to be designed in accordance with DIN EN 12828.
nominal size
DN 15
DN 20
DN 25
DN 32
15