BAS-SVX084A-EN
15
Wiring Installation
•
Replace the control box cover after field wiring to prevent any electromagnetic interference.
•
Review
Table 7
for factory-installed components and voltage amperage.
Table 6.
Binary load values
Below is an example VA draw calculation for a BACnet MS/TP controller on a cooling-only VAV box:
Description
Draw
• Symbio no I/O
• Setpoint and Zone Temperature Sensor Input
• Air Flow Sensor Input
• Occupancy Input
• Binary Out for Air Damper (only one energized at a time, not
including actuator draw)
• Trane F Series Air Damper Actuator (Taken from
Table 7, p. 16
)
Total
• 8.0 VA
• 0 VA
• 0.3 VA
• 0.1 VA
• 0.1 VA
• 4.0 VA
12.5 VA
Below is an example VA draw calculation for a BACnet IP controller on a hot water reheat VAV box:
Description
Draw
• Symbio 210e
• Setpoint and Zone Temperature Sensor Input
• Air Flow Sensor Input
• Binary Out for Water Valve (only one energized at a time, not
including actuator draw)
• Belimo Hot Water Actuator (TR24-3)
• Binary Out for Air Damper (only one energized at a time, not
including actuator draw)
• Trane F Series Air Damper Actuator (Taken from
Table 7, p. 16
)
Total
• 9.5 VA
• 0 VA
• 0.3 VA
• 0.1 VA
• 1.0 VA
• 0.1 VA
• 4.0 VA
15 VA
Below is an example VA draw calculation for a BACnet Zigbee controller with XM on a hot water reheat VAV box:
Description
Draw
• Symbio 210
• Air-Fi WCI (X13790901030)
(c)
• Air Flow Sensor Input
• XM32
• Binary Out for Water Valve (only one energized at a time, not
including actuator draw)
• Belimo Hot Water Actuator (TR24-3)
• Binary Out for Air Damper (only one energized at a time, not
including actuator draw)
• Trane F Series Air Damper Actuator (Taken from
Table 7, p. 16
)
Total
• 8.0 VA
• 0.5 VA (10 mA WCI power draw)
• 0.3 VA
• 5.0 VA (100 mA XM32 power draw)
• 0.1 VA
• 1.0 VA
• 0.1 VA
• 4.0 VA
19 VA
(a) Insignificant load.
(b) See device connected to DC supply for current draw.
(c) Older WCI version draw more current than current design.
Table 5.
Calculating actual VA requirements (continued)
Item
Sub
VA Draw Per I/O (24 Vac)
Maximum Total VA Draw (24
Vac)
Style
Volt Amps
F - Style Actuator
4 VA
Air Valve Actuator C through E Style
12 VA
Fan Power Fan Output
6 VA
Hot Water Proportional
4 VA
Hot Water 2 Position
6.5 VA
Electric Heater Magnetic Contactor
10 VA
Electric Heater Mercury Contactor
12 VA
