VM2912 BACnet VAV Controller / Actuator

Completely self contained
Operates > 1m/s
Adjustable travel
Adjustable velocity
Non-volatile memory

Controller / Actuator. The Velocity Sensor is mounted inside the controller, with the barbed fittings protruding through the side. These are connected to the Averaging Velocity Probe with 6.35mm I.D. plastic tubing. Maximum and Minimum Velocity adjustment potentiometers are on-board. The velocity range is from 0 – 15 m/s and the Minimum adjustment range is from 20 – 100% of the Maximum setting. The Velocity Sensor will operate down to 1 m/s. Velocity settings may also be done over BACnet or Regnet. These settings are stored in non-volatile memory. Adjustment for actuator travel is also included on the controller. The clockwise direction of the actuator can be adjusted from 30 - 90° via the motor travel potentiometer. The actuator direction can also be reversed via Dip Switch 1. The TR2529W Sensor / Setpoint has a concealed setpoint with range of 18 – 28˚C. It also has an RJ11 communications jack for the Regnet comms. This enables a laptop computer to communicate directly with the VM2912 VAV Controller for commissioning or service. However the VM2912 is also a completely stand-alone controller. The VM2912 does not have to be programmed with a computer. It can be fully commissioned via its temperature and velocity setting potentiometers. A duct probe can also be fitted to monitor the supply air temperature so as to reverse the operation of VM2912 whenever hot or cold air is supplied. There are two communication systems. The first is BACnet which is the ASHRAE Standard 135-2001 / ISO 16484-5. This operates over an MS/TP LAN. Up to 128 controllers may be connected to one network. The second communications network is Regnet. This is a local network for communicating directly with the VM2912 and for controlling auxiliary devices such as Heater Board Modules. There are three Heater Board Modules. The HB3112 has one Power Relay for switching one electric heater element directly. The HB3132 which has three Power Relays for switching up to three electric heater elements directly. And the HB3162 which has six Power Relays for switching up to six electric heater elements directly. Each Heater Board has two auxiliary relays for control of two steps of cooling or can be programmed for any other purpose. It also has two heater high limit thermostat connections. These are inserted within their own well into the heater element bank. The first Hi-Limit is set at 70˚C and is autoreset. The second Hi-Limit is set at 90˚C and is manual reset.

Supply Voltage 190 – 265VAC
Frequency 50 / 60 Hz
Power Consumption 2.7w
Ambient Temp Operation -10 to 50˚C
Ambient Humidity Max 90%rh
Dimensions L190 x H100 x D100mm
Weight 0.75kg
Temperature Sensor Thermistor 10K @ 25˚C
Temp Setpoint Range 18 – 28˚C
Velocity Setpoint Range 0 – 15 m/s
BACnet Comms BAUD Rate 9600 19200 38400 76800