Appendix C. CVF4 Ventilation Unit
C-9
FIGURE C-10. 4-Pin Schematic
C.5 CVF4 Example Program
In the example program, the CVF4 heater is controlled based on the solar
position. The109 temperature sensor provides the temperature measurement
used in the solar position instruction. The CVF4 fan is continuously on. Power
to the CVF4 heater is switched using one SPST Single-Channel Solid-State
Relay (FIGURE
). In the beginning of the program, the sensitivity of the
CMP11 is entered as a constant. Wiring for the example is shown in Table
TABLE C-3. Wiring for Program Controlling CVF4 Heater
Function
CMP11
Wire
Color
109
Wire
Color
CVF4
Wire
Color
Relay
Power
Supply
Terminal
CR1000X
Terminal
CMP11 Signal High
White
1H
CMP11 Signal Reference
Black
1L
Clear
Shield
⏚
109 Signal
Black
VX1
109 Excitation
Red
SE3
109 Signal Ground
Purple
⏚