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Building Technologies Boiler sequence controller RMK770 CE1P3132en
HVAC Products 3 Commissioning 23.04.2009
A maximum of 3 extension modules can be fitted. The number of extension modules of
the same type is not limited.
The assignment of functions to the basic module and the extension modules is not
prescribed.
With the plant types, the temperature sensors are always preconfigured to the basic
module as standard.
Relay outputs for 3-position applications are preconfigured to extension modules with
the possibility of using RC units (RMZ789).
The following types of extension module can be connected to every RMK770:
• Universal module RMZ785 with 8 inputs
• Universal module RMZ787 with 4 inputs and 4 relay outputs (1 relay with changeover
contact)
• Universal module RMZ788 with 4 inputs, 2 modulating outputs and 2 relay outputs
(1 relay with changeover contact)
• Universal module RMZ789 with 6 inputs, 2 modulating outputs and 4 relay outputs
(2 relays each for the control of 3-position actuators with RC units can be activated)
The extensions can be activated by configuring them at a free position of the controller.
Position 1 Position 2
RMK770 RMZ788 RMZ787
The settings are to be made as follows:
Main menu > Commissioning > Basic configuration
Operating line Adjustable values / remarks
Plant type
Basic types K, K1.1…K6.3
Position 1
RMZ788
Position 2
RMZ787
At position 1, in this example, extension module RMZ788 is selected.
Then, at position 2, module RMZ787 is selected.
Position 3 is not be used. It is left blank by using setting --- and by confirming with the
OK knob.
During the configuration, the ESC button can be pressed to return to the previous
setting.
Once the configuration is started, it cannot be stopped! Configuration must be contin-
ued until the following message appears:
Caution!
New configuration
ESC OK
If the maximum number of extension modules do not suffice, one or several boilers
must be wired to a second RMK770 (for more detailed information, refer to section
3.5 “Several boiler sequence controllers RMK770”).
Number of extension
modules
Assignment of
functions
Example
Configuration
example
Position 1
Position 2
Position 3
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