Eco Heating Systems CB 105 HW, Installation, Service And User Manual

Page: 102 / 147

E93.1803.901 HW 103
16 CASCADING
System setup
NOTE : for proper functioning of the system, some settings have to be changed, see § 16.5.1 "Emergency mode".
The water heater controller can control multiple water heaters in a cascade setup.
The sensors (Heater sensor and system sensor) are equal to a stand-alone Heater and should only be connected
to the controlling water heater.
Each unit needs its own seperate pump, so no additional pumps are needed. The system sensor is connected to
the managing water heater and calculates the HW setpoint for the cascade system.
Notes:
•
Connections on the water heater side should always be executed as drawn in the picture above.
•
1
Always apply safety components according to all applicable regulations.
•
3
In case of more than one tank, mount the tank sensor in one of the tanks. The temperature of this tank
will be assumed to be representative for all, provided that the installation design is correct.
•
In the inlet (return) connection of the water heater no check valve is recommended.
•
If needed, the water heater control can handle up to sixteen water heaters.
•
For large capacity installations consult your supplier.
PUMP
NON- RETURN VALVE
VALVE
SAFETY VALVE
AUTOMATIC AIR VENT
FILTER
INLET COMBINATION
- Overflow
- Controllable return valve
- Valve
PRESSURE REGULATING VALVE
Explanation:
1) Pressure relief valve (mandatory in case water 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 the tank sensor in an immersion bulb into the tank at
1/5 from the bottom of the tank and the system sensor onto
the return pipe as shown in the figure.
2, 3
6) Drain valve (recommended)
7) Hot and cold-water mixers
8) Mount the (strap-on) system sensor to the pipe close to the
T-piece of the last tank as shown in the figure. This sensor
measures the supply temperature from both heaters.
A) Cold water inlet (service pipe)
B) Hot water supply circulation
C) Circulation return
DHW
SENSOR
SYSTEM SENSOR
5
8
4