2 System installation
Close the housing without tilting until the locking mechanism engages.
Check the sensor resistance with the upper shell removed, on the contacts “S” and “GND”.
See point 2.8.2 “Sensor check” (type KTY81-110) for the temperature-dependent setpoints. Only the total resistance
can be tapped on contacts “I” and “GND”, which is comprised of the fixed resistance of the respective set mode, the
resistance of the setpoint thermostat (dial +/-5 °C) and the resistance of the room sensor. The resistance differential
when changing the slide switch setting can be measured again for fault diagnostics. The target difference between
the two switch settings is 500 ohm. Check the setpoint thermostat (dial +/-5 °C) by determining the resistance
differential between the left stop and right stop. The target difference is 72 ohm.
2.1.11.5.3 Heating circuit expansion module (HCM):
The system can be extended in a distributed manner via network technology with the heating circuit expansion
modules. It is essential in this regard that the expansion modules be placed where the sensors and actuators,
which are activated with these modules, are also located, e.g. at the heat distributor station of each building in
the network.
Supply pumps, zone valves or buffer charge pumps for distributed stations should also
be placed in a distributed arrangement. If this is not the case (additional to the bus
cabling) the 230 V activation must be routed back to the respective device.
• Outputs: O3 - O10, relay outputs 230 VAC, 2 A, according to the connection diagram, none of the
other outputs are currently used
• Inputs: I1 - I8: Analogue inputs according to the connection diagram,
I11: Analogue input 0 - 20 mA (connection heat meters for power measurement)
•
Mains connection: 230 VAC 3-pole
• LED Power: Flashes every second if there is voltage; off if the power is switched off;
fast flashing if the fuse is defective.
•
LED Bus: Flashes in one second intervals if the bus communication is intact .
•
LEDs for the outputs: Indicate whether the output is switched on.
•
If bus communication is interrupted for longer than 10 seconds, all outputs switch off.
•
If a defective fuse or phase is detected, all outputs switch off.
Installation instructions:
• Open the enclosure with a screwdriver
• Cable strain relief: The cabling to the module must be routed in cable ducts or
customer-supplied strain relief must be provided.
• Set the station number switch with screwdriver
• Apply the safety sticker in the national language.
• Check the conductors and N-conductors from the power side – do not swap!
Attention! The heating circuit module only functions with a software version greater than 3.38.
(“Customer Service” menu)
MA-Easyfire 10.2008_EN.indd 37MA-Easyfire 10.2008_EN.indd 37 30.03.2009 13:30:04 Uhr30.03.2009 13:30:04 Uhr
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