Eco-King HWB-299, Installation And Service Manual

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E93.1801EN171 HWB installation manual 94
Water Heater Cascade Setup.
In order for the system to work for cascade the communication busses must be parallel linked together. The man-
aging water heater uses the AL-bus connection 20-21 for the cascade. The depending water heaters must be
connected to the managing water heater on the 10-11 connection terminals.
It is important that the power on the 10-11 connection terminals on all dependent water heaters is switched to the
OFF position.
(see also §14.2.1) All water heaters in the cascade system must have a unique address selected.
Before commissioning a cascade installation, a number of parameters have to be changed.
These parameters can be programmed on the unit itself.
16.2.1 S
ETTING THE WATER HEATER ADDRESS
The managing water heater of the cascade system is connected to the AL-BUS connection on terminals 20-21
This connection also provides the power for the communication bus. The depending water heaters are all parallel
connected to the managing water heater communication bus.
The bus power is provided by the managing water heater on terminals 20-21, switch S1 must be set in the OFF
position (all controls).
The water heater address can be set through an e2prom set-
ting or via the Switch input available on the control. Each wa-
ter heater must be configured with its own unique address.
16.2.2 E2
PROM ADDRESS SELECTION THROUGH E
2
PROM SETTING
.
This setting can be changed on the water heater control.
Changes in parameter may only be carried out by a
skilled commissioning/service engineer, who has had
specific training for setting up the HWB range water heat-
ers. He will be able to check whether the installation func-
tions correctly after the parameter change has been
done.
Parameters for cascade operation are found in the Mod-
ule cascade settings menu, located in the Water heater
settings menu.
Parameters in the Water heater cascade settings menu
should not be used.
Address rules
The cascade managing address (parameter 184) must be set to ‘Managing’ on the managing water heater.
The cascade depending addresses (parameter 184) must be set in a logical numbered order from 1: Dep. 1,
Dep. 2 etc. on the depending water heaters.
The total number of water heaters in the cascade must be stored in parameter 147 on the managing water
heater.
When the number of water heaters is set to 4, the first three depending controls are expected to be available
for the cascade. In this case depending controls 1, 2 and 3 must be selected. When any of these 3 are not
present on the communication bus the managing control detects the loss of a depending control and gener-
ates the warning: Comm. Lost with module.
J11 J8
OFF ON
WARNING
NOTICE
NOTICE
Max. 16 boilers or units