Trane Tracer UC210 Installation, Operation, And Programming page 15

Table 6. Calculating Actual VA Requirements
Item
UC210 Board
24 Vdc Supply
Binary Outputs (TRIAC)
BO1 to BO5
Below is an example calculation for a cooling-only box current requirements:
Description
• UC210 no I/O
• Setpoint and Zone Temperature
• Flow
• Occupancy Input
• Binary for Air Damper (only one energized at a time, not
including actuator draw)
• Total
With a Trane F Series Box:
(a) See device connected to DC supply for current draw.
•
•
Table 7.
Style
F - Style Actuator
Air Valve Actuator C through E Style
Fan Power Fan Output
Hot Water Proportional
Hot Water 2 Position
Electric Heater Magnetic Contactor
Electric Heater Mercury Contactor
Note: VariTrane cooling-only Series D and E models consume 20 VA (12 VA for the actuator and 8 VA for the board). The
BAS-SVX62E-EN
Sub
UC210 (No I/O)
3 x AI
2 x UI
1 x PI
1 x BI
2 x AO
6 x BO (TRIAC)
(a)
200 mA
Replace the control box cover after field wiring to prevent any electromagnetic interference.
Review Table 7 for factory-installed components and voltage amperage.
Binary Load Valves
heating output ratings remain the same.
VA Draw Per I/O (24 Vac)
0.2 VA per AI
0.13 VA per UI
0.13 VA per PI
0.17 VA per BI
1 VA Per AO
0.34 VA Per TRIAC (No Load)
1 VA Per 25 mA DC
0.5 A- 12 VA@ 24 Vac
Draw
• 8 VA
• 0.4 VA
• 0.13 VA
• 0.17 VA
• 0.34 VA
• 9.2 VA (Plus air damper draw)
13.2 VA Total
Volt Amps
4 VA
12 VA
6 VA
4 VA
6.5 VA
10 VA
12 VA
Wiring Installation
Maximum Total VA Draw (24
Vac)
8 VA
1 VA
0.25 VA
0.25 VA
0.5 VA
2 VA
1 VA
Subtotal for UC210; 13 VA
8 VA
Total for UC210; 21 VA
12 VA Maximum
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