Alfa Laval Micro - Page 6

Alfa Laval Micro
Installation, service and operating instruction
4
8 Running the room thermostat CM737 and CM721 ............................................................ 30
Choosing the operating mode ................................................................................................................ 30 8.1
During normal operation ......................................................................................................................... 30 8.2
Programming the room thermostat – efficient daily use ......................................................................... 30 8.3
The Built-in Heating Program ............................................................................................................ 30 8.3.1
Reviewing the Heating Program............................................................................................................. 31 8.4
Modifying the heating program in the CM737 ........................................................................................ 31 8.5
Modifying the heating program in the room thermostat CM721 ............................................................. 32 8.6
Disabling/enabling time periods ............................................................................................................. 32 8.7
Adjusting the Time .................................................................................................................................. 32 8.8
9 Special functions for the CM737 ........................................................................................ 33
OTC heating curve ................................................................................................................................. 33 9.1
Parallel adjustment of heating curve ...................................................................................................... 33 9.2
Holiday function ...................................................................................................................................... 33 9.3
10 Basic operation of the system CM721 ............................................................................... 34
Setting one temperature for the whole day ............................................................................................ 34 10.1
Automatic operation ............................................................................................................................... 34 10.2
Temporary manual override ................................................................................................................... 34 10.3
Communications loss ............................................................................................................................. 34 10.4
11 Special functions for CM721 .............................................................................................. 35
Service indicator ..................................................................................................................................... 35 11.1
BDR91 relay box fail safe mode setup ................................................................................................... 35 11.2
Automatic Summer/Winter Time Change ............................................................................................... 35 11.3
Optimum Start ........................................................................................................................................ 35 11.4
12 Activation of installer parameters...................................................................................... 36
Entering the installer set-up mode ......................................................................................................... 36 12.1
CM737-Installer parameters table .......................................................................................................... 37 12.2
CM737-Category 1: Room Thermostat Settings ............................................................................... 37 12.2.1
CM737-Category 2: System Settings ................................................................................................ 38 12.2.2
CM737-Category 3: Boiler Settings ................................................................................................... 38 12.2.3
CM737-Category 4: Transparent Boiler Parameter .......................................................................... 39 12.2.4
CM737-Category 5: Fault History ...................................................................................................... 39 12.2.5
CM721– Installer parameters table ........................................................................................................ 40 12.3
CM721- Category 1: Room Thermostat Settings .............................................................................. 40 12.3.1
CM721- Category 2: System Settings ............................................................................................... 41 12.3.2
Using the room thermostat for specific applications ......................................................................... 41 12.3.3
13 Troubleshooting the CM737 ............................................................................................... 42
Fault Codes on the CM737 .................................................................................................................... 43 13.1
14 Troubleshooting the CM721 ............................................................................................... 44
Diagnostic mode, CM721 ....................................................................................................................... 45 14.1
15 Differential pressure control valve, DPC ........................................................................... 46
Setting the DPC valve ............................................................................................................................ 46 15.1
Flow rate graph of the DPC .................................................................................................................... 46 15.2
16 Pump settings and pump performance ............................................................................. 47
Grundfos Alpha2L settings ..................................................................................................................... 47 16.1
Pump curve ............................................................................................................................................ 48 16.2
17 Electrical circuit diagram ................................................................................................... 49
Micro RTC .............................................................................................................................................. 49 17.1
Micro STC and Micro STC2 ................................................................................................................... 50 17.2
18 Schematic diagram, main components ............................................................................. 51
AquaMicro .............................................................................................................................................. 51 18.1
Micro DPC .............................................................................................................................................. 51 18.2
Micro RTC .............................................................................................................................................. 52 18.3
Micro STC ............................................................................................................................................... 52 18.4
Micro STC2 ............................................................................................................................................. 53 18.5
Micro HTC .............................................................................................................................................. 53
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