VT8000 Room Controllers VZ8250 Installation Guide Variable Air Volume (VAV) Unit Firmware Revision 2.
TABLE OF CONTENTS 1. SAFETY INFORMATION ............................................................................................................................... 3 2. INSTALLATION ............................................................................................................................................ 6 3. TYPICAL APPLICATION: PRESSURE INDEPENDENT (NO FAN) ................................................................. 7 4.
VZ8250 [ Installation Guide ] 1. 1.1 SAFETY INFORMATION IMPORTANT INFORMATION Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service or maintain it. The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.
VZ8250 [ Installation Guide ] 1.3 BEFORE YOU BEGIN LOSS OF CONTROL WARNING LOSS OF CONTROL • The designer of any control scheme must consider the potential failure modes of control paths and, for certain critical control functions, provide a means to achieve a safe state during and after a path failure. Examples of critical control functions are emergency stop and over travel stop. • Separate or redundant control paths must be provided for critical control functions.
VZ8250 [ Installation Guide ] LOCATION NOTICE LOCATION • • • • • • • • • • Do not install on an exterior wall. Do not install behind a door. Do not install in areas with a direct heat source. Do not install near any air discharge grill. Do not install in areas exposed to direct sunlight. Ensure the Room Controller has sufficient natural air circulation. Ensure the wall surface is flat and clean. Ensure external thermal sensor wirings are away from noisy electrical sources. Install 1.3 to 1.
VZ8250 [ Installation Guide ] 2. INSTALLATION 1. Remove the security screw (if applicable) from the bottom of the Room Controller cover. 2. Open the unit by pulling on the bottom side of the Room Controller (Figure 1). 3. Read the FCC ID and IC label installed inside the cover before installing any wireless product. 4. Ensure the correct side of the base faces up. 5. Pull the cables 6in (15cm) out from the wall. Figure-1 Open the cover 6.
VZ8250 [ Installation Guide ] 3. TYPICAL APPLICATION: PRESSURE INDEPENDENT (NO FAN) 1 2 3 4 5 6 UO12 - 0-10V Output UO10 - Open Valve UO11 - 0-10V Output UO9 - Close Damp. RH BO8 - Aux Heat RC (24VAC) C (Common) BO3 BO4 - Fan On BO2 BO1 0-10V Analog Control 7 8 9 10 11 12 DAMPER 0-10V ANALOG ACTUATOR 0-10V ANALOG HEATING COIL RC Input Com. RC Input Com. BASEBOARD 24V~ 24V Com.
VZ8250 [ Installation Guide ] 4. TYPICAL APPLICATION: PRESSURE INDEPENDENT (PARALLEL FAN) UO12 - 0-10V Output UO10 - Open Valve UO11 - 0-10V Output UO9 - Close Damp.
VZ8250 [ Installation Guide ] 5. TYPICAL APPLICATION: PRESSURE DEPENDENT (NO FAN) UO10 - Open Valve UO11 - Open Damp. UO9 - Close Damp. RH UO12 - Close Valve 1 2 3 4 5 6 BO8 - Aux Heat RC (24VAC) C (Common) BO3 BO4 - Fan On BO2 BO1 Floating Control HEATING VALVE DAMPER FLOATING ACTUATOR 7 8 9 10 11 12 Close Open Com. Close Open Com. BASEBOARD 24V~ 24V Com.
VZ8250 [ Installation Guide ] 6. TERMINAL IDENTIFICATION 6.
VZ8250 [ Installation Guide ] 6.3 DAMPER Supported output types: • • • • • 0-10V Direct Acting 0-10V Reverse Acting 2-10V Direct Acting 2-10V Reverse Acting Floating Recommended damper: Schneider Electric MS41-6043 or equivalent.
VZ8250 [ Installation Guide ] 6.
VZ8250 [ Installation Guide ] 7. HOME SCREEN DISPLAY Hospitality User Interface Shown Date Time Occupancy Status System Status Up Arrow Raise Temperature Setpoint Room Indoor Temperature Occupied Setpoint of Current System Mode Down Arrow Lower Temperature Setpoint Room Indoor Humidity Outdoor Temperature Help Enter help screen Language Select preferred language Unoccupied Mode Override 028-0506-04_II-VZ8250-2.4_EN www.viconics.
VZ8250 [ Installation Guide ] 8. HOW TO ENTER SET-UP SCREEN Touch and hold this point for 3 seconds to enter set-up mode NOTE: If a configuration/installer password is activated to prevent unauthorized access to the configuration menu parameters, a password entry prompt shows to prevent access to the device configuration components. 9.
VZ8250 [ Installation Guide ] 10. BALANCING During balancing, a technician will install a calibrated flow sensor (Balometer) over the outlet in each room and use this to calibrate the VZ8250: • Pressure Independent: • True airflow will be measured and compared to the airflow calculated by the VZ8250 at various setpoints. VZ8250 calibration parameters will be adjusted by the technician to ensure the calculated airflow matches the true airflow.
VZ8250 [ Installation Guide ] 10.1 PRESSURE INDEPENDENT Before starting to Balance the system, check the following parameters are correctly configured in the Configuration menu: • • • • • VAV Box Type Flow at 1-inch water column Airflow Sensor Pressure Range Actuator Type Floating Actuator Time Airflow Balancing settings can be found on the Balancing page of the Setup menu. The recommended process for Balancing the system is: 1. 2.
VZ8250 [ Installation Guide ] BALANCING OPTIONS 1 /2 Ba la nc i ng (PI ) A i rflow le v e l 49 CFM A i rflo w s e tpo int 50 CFM Mi n. flo w 50 CFM Ma x . c o o l flo w 180 CFM Ma x .
VZ8250 [ Installation Guide ] 2 /2 Ba la nc i ng (PI ) A i rflow le v e l 49 CFM A i rflo w s e tpo int 50 CFM D amp. o v e r r ide M i n. fl ow B alo me te r 50 CFM Mi n.
VZ8250 [ Installation Guide ] 10.2 PRESSURE DEPENDENT Before starting to Balance the system, check the following parameters are correctly configured in the Configuration menu: • • • VAV Box Type Actuator Type Floating Actuator Time Airflow Balancing settings can be found on the Balancing page of the Setup menu. The recommended process for Balancing the system is: 1. 2. On page “Balancing (PD)”, set the approximate damper positions for Minimum, Maximum Cooling, Maximum Heating, Maximum Reheat.
VZ8250 [ Installation Guide ] Pressure Independent Configuration parameter BACnet Function description Reheat Position AV253 (R/W) Damper position during reheating: • Units = % • Min = 0 • Max = 100 Damper Override MV172 (R/W) Force the damper to a selected position during balancing 028-0506-04_II-VZ8250-2.4_EN 0 None (Default) No damper override. Damper under normal control. 1 Min. flow Force damper to maintain minimum airflow setpoint 2 Max.
VZ8250 [ Installation Guide ] APPENDIX A. DEPLOYMENT The placement of the Room Controller must be given consideration. It is recommended to install the Room Controller as close to a door as possible (without being blocked by the door), or in an area with high occupant movement. Ideally, the Room Controller should be installed 5 feet (1.5 meters) above the floor surface to ensure maximum detection range is achieved.
VZ8250 [ Installation Guide ] A.2 EXAMPLE OF NON-RECOMMENDED DEPLOYMENT The below shows four Room Controllers (two for each room) installed in non-ideal locations for the two rooms. The examination room shows one Room Controller installed in a low traffic area near the door, and a second Room Controller installed on the wall directly opposite the door.
VZ8250 [ Installation Guide ] A.3 ROOM CONTROLLER PIR SENSOR DETAILS The internal Room Controller PIR sensor only detects lateral movement. It cannot detect movement when a person is moving toward it. It will not detect someone seating on a chair and/or lying on the bed. 40° 6.1m Lateral movement of 1.5m/s 6m 80° BEDSIDE TABLE BEDSIDE TABLE 120° BED 4. Additional motion sensor 3m BATHROOM 4-5m Additional motion sensor CHAIR m 3.4 TV TABLE 028-0506-04_II-VZ8250-2.4_EN www.viconics.
VZ8250 [ Installation Guide ] A.4 Install the Room Controller to cover more lateral movement. Install a door sensor, the internal Room Controller occupancy logic works better with a door sensor. Once a motion is detected after a door is opened, the room stays in an occupied state until the door is opened again which puts the Room Controller in stand-by mode and if there is a motion then it goes back in occupied mode.
