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Quick-guide cascade set-up
Below a quick set-up, all settings are described in detail in the successive chapters
1.
Link the boilers with a 2-wire cable in parallel.
Connect 20 on the managing boiler to 10 on the dependent boilers and connect 21 on the managing
boiler to 11 on the dependent boilers.
20 21
10 11
2.
Set the switch "bus power on" at the side of the boiler control to the off position.
Note the line of the bottom of the boiler control on above picture to determine the off position.
3.
Change the burner address on every boiler that is part of the cascade
Parameter: Menu - Settings - Boiler settings -
Address)
On managing boiler: set as manager
On depending boilers: set as dep. 2, dep. 3, etc.
(DO NOT USE Boiler Cascade Settings)
4.
Change number of units on manager boiler only
Parameter: Menu - Settings - Boiler settings -
of units)
On managing boiler: set at total number of units that are part of the cascade (= managing + number of
depending)
On depending boilers: set at 1 (= default setting)
5.
Change parameter 35 "DHW Mode" of depending boilers only.
Parameter: Menu - Settings - Boiler settings – Boiler Parameters - Parameter 35 (DHW Mode)
Set Mode to 0 for depending boilers only. This causes a crossed-out tap at the normal display. If this set-
ting is forgotten the message MN:DHW Sensor Open appears.
6.
Connect required sensors to the managing boiler only
Tank sensor required at Low voltage connections 5 and 6.
System temperature sensor required at Low voltage connections 3 and 4.
7.
Deactivate de-air on managing boiler only after de-airing the boilers and system
Parameter: Menu - Settings - Boiler settings - Boiler parameters - Parameter 139 (Dair active)
On managing boiler: set to No
Changes in parameter may only be carried out by a skilled commissioning/service engineer, who has had
specific training for setting up the EFW range water heater. The engineer will be able to check whether the
installation functions correctly after the parameter change has been done.
Parameters for cascade operation are found in the Module cascade settings menu, located in the heater
settings menu. Parameters in the Boiler cascade settings menu should NOT be used.
102
Depending boilers
10 11
10 11
10 11
Module Cascade Settings
Module Cascade Settings
E93.1804.014
- Parameter 184 (Burner
- Parameter 147 (Number
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