Strebel S-WG 100, Installation, Operating And Maintenance Manual, Page: 38 / 125

E09.012.246 Manual S-WG
39
9.1.2
C
ASCADE SET
-
UP
S-WG water heaters and tanks can be installed cascaded in a number of possible combinations cf. the instruc-
tions in the next paragraphs.
For the installation of cascaded water heaters and tanks, always consult the tables in § 9.4. All re-
quirements concerning pipe diameters and lengths as well as pump choice are presented orderly
here.
By applying these you’ll improve both the well-functioning and the life time of your S-WG installa-
tion.
PUMP
NON RETURN VALVE
VALVE
SAFETY VALVE
AUTOMATIC AIR VENT
FILTER
INLET COMBINATION
- Overflow
- Controllable return valve
- Valve
PRESSURE REGULATING VALVE
Example of a combination of three water heaters and two tanks
Notes:

Connections on the water heater side should always be executed as drawn.

In the inlet (return) connection of the water heater no check valve is recommended.

All designs and tables in the next paragraphs go up to eight water heaters max. If needed, the water
heater control can handle up to twelve water heaters.
B
C
B
C
7
3
1
2
A
A
5
6 6
6 6 6 6 6 6
Extra explanation:
1) Pressure relief valve (mandatory in case wa-
ter pressure is too high)
2) Inlet combination with valve (mandatory)
3) Apply filter if necessary (recommended)
4) A suitable safety valve must be mounted near
the water heater (mandatory)
1
This safety valve may never be isolated from
the water heater by means of a ball valve
5) Mount remote pipe sensor as close as possi-
ble to the tank
6) Drain valve (recommended)
7) Hot and cold water mixers
A) Cold water inlet (service pipe)
B) Hot water circulation flow
C) Circulation return
1
Always apply safety components according to
all applicable regulations.