MM1 Fan-coil Controller

Transcription

1 MM1 Fan-coil controller MM1-A12 -- Stand alone MM1LA12 -- LO network MM1BA12 -- BAnet network MM1SA12 -- Local network Doc# A stand-alone or network connected unit controlling a three speed fan, a single step heater and a thermic valve. 2-pipe system with or without change-over On-off or PWM valve control Pre-set temperature set point or use with a MK2A22 wall control Inputs for Return air and water temperature sensors Input for Occupancy sensor Auxiliary input for various interlocks Power supply to unit: 230V A Direct switching of power to valve, fan and heater over plate for power terminals Plugable screw terminals 01

2 Index Refrences Design Dimensions Technical data Power terminals ommunication port Signal I/O terminals ontrol 05 Temperature control ontrol process Un-occupied mode onserve mode Selection Wiring examples Accessories Installation notes Mounting template LO earthing References MM1 range of controllers LO interface MM1 range of controllers BAnet interface LOWORKS Bus Wiring Guidelines LOWORKS etwork Wiring Aid Wall Unit (User interface) MM1LQ20 MM1BQ20 AT5-1LQ10 LOTKSQ10 MK2Q10 02

3 Design The MM1.. range of fan-coil controllers consist of a controller plus power supply housed in a fire retardant ABS enclosure. The power and low voltage terminals are situated on opposite sides of the enclosure. A cover plate is supplied for the power terminals. POWER TERMIAL OVER PLATE POWER TERMIALS HOUSIG PROGRAMMIG PORT ID BUTTO OMMUIATIO PORT SIGAL I/O TERMIALS ote: 230V supply to the unit is switched through the unit to the control valve, fan and heater element. Dimensions 92mm cover plate not shown 131mm TOP VIEW 41mm cover plate not shown

4 Technical Data Power terminals low med high 3 3 speed fan 230V A 3Amp max open T thermic actuator 230V A 100mA max LOW MED FA HIGH VALVE 230V ~ A ID B D HEAT 230V ~ L A B D heater element heat 230V A 1,5kW max. 230V A power supply in L LO DISP T T2 MM1LA12 IP-1 GD IP-2 GD 12v D ommunication port LO earth tag LO BAnet Local net 02 gnd signal A signal signal 04 B 04 signal 04 Signal I/O terminals MK2.. user interface (wall unit) signal signal 05 10K T temp.sensor Return air 10K T temp.sensor Water supply or discharge air Door / window switch Voltage free contact signal 1 gnd Occupancy sensor Power usage 720mW max Voltage free signal Oc signal 2 gnd 12V ote: 230V power to the unit must be wired to terminals and D only. External eutral or Live loops must not be installed. Terminals 09/10 can be configured for water temperature or for discharge air temperature. See selection code on page

5 Technical Data (continued) ote: All user interface units (wall unit on terminals 05/) have a built in temperature sensor. If however, a return air temperature sensor is wired to terminals / the return air sensor is dominant and the wall unit sensor is ignored. Wiring of the user interface to terminals 05/ is polarity insensitive. Voltage free contact inputs to terminals 11/12 and 13/14: Door/window switch (term.11/12) -- closed contact indicates door/window closed. Occupancy (term.13/14) -- closed contact indicates occupied. ontrol Temperature control cold water supply 100% heating element valve output -1,5-1,0-0,5 SP +0,5 +1,0 +1,5 100% valve hot water supply output -1,5-1,0-0,5 SP +0,5 +1,0 +1,5 ontrol Process Temperature set point entered on the wall unit can be from 18 up to 26. Switch over between heating and cooling is automatic with a 1 dead band between heating and cooling. Therefore a temperature rise of 0,5 above set point causes the controller to go into cooling mode and a fall to 0,5 below set point to go into heating mode. Indications on the wall unit: ooling mode -- Snow flake symbol Heating mode -- Sun symbol In between -- The letter A The controller use a 1 degree on/off band for both heating and cooling modes. 05

6 ontrol (continue) Valve control - on/off (solenoid or thermic): Opens fully on temperature reaching 1.5 from set point and closes fully should the temperature move to 0.5 from set point. Heater control - on/off: Switches on when temperature drops to 1.5 below set point and switches off should the temperature rise to 0.5 below set point. The fan speed control is either on/off or 3 speed. The three speed setting is entered on the wall unit. Two bars for low, four for medium and six for high speed. ontrol Process in un-occupied mode Input (voltage free) over terminals 13/14 is used for occupancy. A closed input places the controller in occupied mode and an open input in un occupied mode. Occupied mode: (closed contact) ormal control process as set out above. Un-occupied mode: (open contact) o heating or cooling is provided between 18 and 26. ooling "switches on" at 27,5 and off at 26. Heating "switches on" at 16.5 and off at 18. ontrol process in conserve mode Input (voltage free) over terminals 11/12 is used for energy waste monitoring. For instance a door and/or window switch. An open contact indicate an open window or door placing the unit into conserve mode. onserve mode: (open contact) Fan only. o heating or cooling will take place. ormal mode: (closed contact) ormal control process as set out above. Selection MM1aAb2 1 term.09/10 -- water temperature - L B S Alone standing LO connectivity BAnet connectivity Local network 2 term.09/10 -- discharge air temperature Only used in LO or BAnet aplications for report back on the building management system.

7 Wiring example MM1LA22 A typical wiring diagram for a fan-coil controller with LO, discharge air temperature monitoring, occupancy sensing and window monitoring. fan 3 valve T heater A B D low med high open on L (1) LO earth tag (6) LO (3) occupation sensor 12VD gnd signal Oc MK2.. wall unit (user interface) (2) window switch return air temperature (5) gnd signal discharge air temp. (4) otes on this example: 1) o eutral or Live looping on terminals. 2) Window open (open contact) -- controller in conserve mode. 3) Room unoccupied (open contact) -- controller in unoccupied mode. Bridge if not in use. 4) Discharge air temperature is measured for report back on the LO network. 5) If the return air temperature sensor is not installed room temperature is measured at the wall unit. 6) The earth tag must be wired, directly or indirectly, to 3rd pin Earth.

8 Accessories MK2A22 T10HB1 T10HB2 User interface (wall unit) 5 button. 10K T temperature sensor. 1m cable. 10K T temperature sensor. 2m cable. Installation notes Mounting template 92mm wiring area use M4 tap screw 120mm 190mm wiring area LO earthing On the MM1LA..0 configurations, the LO earth tag must be attached to the frame of the fan-coil unit. The fan coil frame must in turn be attached to the power supply 3rd pin earth.

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