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Mircom
OpenBAS-HV-WLSTH
Operating manual
ireless thermostat transmitter for
OpenBAS-HV-WLSTH
w
VAV / Fan & Coil / Mini split / Water source applications
The OpenBAS-HV-WLSTH wireless temperature and humidity transmitter and thermostat,
works matched to a OpenBAS-HV-VAVFC receiver controller to provide an easy to set up
HVAC control for end HVAC end unit applications such as: VAV boxes, fan and coil units,
mini split and water source chiller / heat pump units.
OpenBAS-HV-VAVFC
receiver unit for VAV / FAN & COIL applications
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Summary of Contents for Mircom OpenBAS-HV-WLSTH
- Page 1 OpenBAS-HV-WLSTH VAV / Fan & Coil / Mini split / Water source applications The OpenBAS-HV-WLSTH wireless temperature and humidity transmitter and thermostat, works matched to a OpenBAS-HV-VAVFC receiver controller to provide an easy to set up HVAC control for end HVAC end unit applications such as: VAV boxes, fan and coil units, mini split and water source chiller / heat pump units.
- Page 2 Mircom OpenBAS-HV-WLSTH Operating manual The OpenBAS-HV-WLSTH works in the 433 MHz unlicensed band providing a RF link with a matched receiver to up to 100 meters in line of sight applications and 50 meters indoors. When used in wireless applications it is powered by two AA alkaline batteries which provide , up to two years of operation, depending on the transmission rate that can be set between a 10-30 seconds periods.
- Page 3 Mircom OpenBAS-HV-WLSTH Operating manual Component description for OpenBAS-HV-WLSTH transmitter: Back Front LCD display Alternate power supply Programmer and RS485 bus connector connector Antenna Transmit LED Temperature Temperature decrease 1.5 volts increase button AA alkaline button batteries Manual / auto fan speed...
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Page 4: Keyboard Operation
Mircom OpenBAS-HV-WLSTH Operating manual Keyboard operation The following diagram depicts the button names from the keyboard as they will be described on the rest of this user manual. Temperature Temperature decrease increase button button MAN/AUTO ON/OFF Manual / auto On / Off... - Page 5 Mircom OpenBAS-HV-WLSTH Operating manual Fan & Coil, Mini Split and Water source heat pump operation For Fan & Coil and mini Split operation, the thermostat will depending on the current temperature, the set point and the proportional band, change the speed of the fan (if the auto mode is selected) and turn on or off the cooling or heating stages as needed (regardless of the auto / manual mode).
- Page 6 Mircom OpenBAS-HV-WLSTH Operating manual Variable air volume (VAV) box operation For VAV operation, the thermostat will depending on the current temperature, the set point and the proportional band, output a 0 to 100% signal on the analog output (0 to 10 Volts) to position the VAV actuator accordingly (regardless of the auto / manual mode).
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Page 7: Programming Modes
Mircom OpenBAS-HV-WLSTH Operating manual Programming modes The wireless transmitter can be programmed beyond the user set points to commission it for the correct operation that matches the intended use. Press and hold the button for 5 seconds to enter basic... - Page 8 Mircom OpenBAS-HV-WLSTH Operating manual Unoccupied temperature set point adjust. Humidity set point adjust. Basic programming mode In this basic programming mode, only the most three basic adjustments can be made. First the units being displayed can be selected between Celsius or Fahrenheit degrees by selecting the INC or DEC buttons.
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Page 9: Advanced Programming Mode
Mircom OpenBAS-HV-WLSTH Operating manual Advanced programming mode In this programming mode, all parameters can be adjusted. To enter advanced programming mode press and hold the MAN/AUTO button for 10 seconds, and release it when the T1 display appears on screen. - Page 10 Mircom OpenBAS-HV-WLSTH Operating manual Calibrate humidity sensor The digital i2c temperature and humidity sensor comes factory calibrated within a 2 %RH accuracy, if however it needs to be calibrated against a well-known accurate humidity reference, on this next screen the value being read can be adjusted within a +/- 10 %RH range in 0.1 %RH steps.
- Page 11 Mircom OpenBAS-HV-WLSTH Operating manual Select the HVAC program The program for both the transmitter and the receiver can be set in this parameter, the following programs are available: 1. VAV box with pressure sensor for pressure independent operation. 2. VAV boxes no pressure sensor for pressure dependant operation.
- Page 12 Mircom OpenBAS-HV-WLSTH Operating manual Select the wireless group or wired protocol For wireless operation a group must be selected between values of 1 to 10, each wireless group can have up to 199 addresses. If instead a value between 11 to 15 is selected, the wired interface will be used instead, and the address will represent the address of the RS485 interface on the bus.
- Page 13 Mircom OpenBAS-HV-WLSTH Operating manual NOTE: Each Wireless group can have up to 199 addresses, so up to 1990 transmitters can theoretically be installed within a 100 meters radius of the transmitter’s wireless range without addressing issues for the 10 groups.
- Page 14 Mircom OpenBAS-HV-WLSTH Operating manual Battery voltage The battery voltage is visible on this screen; the voltage is shown without decimal points so for example a value of 33 means 3.3 Volts. When the voltage falls below a voltage that indicates that 90% of the energy of the battery has been depleted, a low battery sign will blink on the main display while the transmitter is operating in normal mode.
- Page 15 Mircom OpenBAS-HV-WLSTH Operating manual Set point unoccupied mode The unoccupied set point can be changed with the INC and DEC buttons, the value can be adjusted within the range of 19-27 °C or their equivalent in Fahrenheit 66-80°F To jump to the next parameter press the ON/OFF button. If no button activity is detected within 20 seconds the thermostat will revert automatically to normal operation mode.
- Page 16 Mircom OpenBAS-HV-WLSTH Operating manual Page 16...
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