Slant/Fin VHG-100-CH, Installation And Service Manual

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E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
S
ETTING THE BOILER ADDRESS
The managing boiler of the cascade system is connected to the AL-BUS connection on terminals 21-22
This connection also provides the power for the communication bus. The depending boilers are all parallel
connected to the managing boiler communication bus.
The bus power is provided by the managing boiler on terminals 21-22, switch S1 must be set in the OFF position
(all controls).
The boiler address can be set through an e2prom setting or via the Switch input available on the control. Each
boiler must be configured with its own unique address.
Changes in parameters must only be carried out by a
skilled commissioning/service installer, who has had
specific training for setting up the VGH-boilers. The
installer will be able to check whether the installation
functions correctly after changing the parameters.
Parameters for cascade operation are found in the
Module cascade settings menu, located in the Boiler
settings menu. Parameters in the Boiler cascade settings
menu must not be used.
Figure 14.2
Address rules
The cascade managing address (parameter 184 must be set to ‘Managing’ on the managing boiler.
The cascade depending addresses (parameter 184 must be set in a logical numbered order from 1: Dep. 1, Dep.
2 etc. on the depending boilers.
The total number of boilers in the cascade must be stored in parameter 147 on the managing boiler.
When the number of boilers 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 generates the warning:
CC_LOSS_COMMUNICATION.
Figure 14.3
WARNING
NOTICE
NOTICE
J11 J8
OFF ON
Max. 16 boilers or units