Orion System VCM - Manual (Page 19)

Operator Interfaces
Technical Guide
19
Configuration Screen #14
VCM Cnfg ID 59
Mod Cooling: NO
Mod Heating: NO
[0=NO 1=YES]
Enter a “1” for “YES” if the HVAC unit is controlling Modulating
Heating or Modulating Cooling or both. If your HVAC unit is going to
use a Modulating Chilled Water Valve or is equipped with a Digital
Compressor, you must select “YES” for Modulating Cooling. If your
HVAC is using a Modulating Hot Water Valve, Modulating Steam valve
or a SCR Controlled Electric Heater you must select “YES” for Modu-
lating Heating.
Configuration Screen #15
VCM Cnfg ID 59
Mod Heating
Output Signal.: 0
[0=0-10V 1=2-10V]
Enter a “0” for a 0-10 VDC signal to a Modulating Heat Source such as
a Hot Water Valve or SCR Electric Heater. Enter a “1” for a 2-10 VDC
signal to a Hot Water Valve or SCR Electric Heater.
Configuration Screen #16
VCM Cnfg ID 59
Mod Heating
Rev Acting: NO
[0=NO 1=YES]
Enter a “1” for “YES” if the Modulating Heat Source requires 0 VDC
to open and 10 VDC to close.
Configuration Screen #17
VCM Cnfg ID 59
Mod Heating
Prop. Window: 5 ° F
Time Period: 10 s
The Modulating Heating Proportional Window is the control range of
the Modulating Signal above and below the Active Supply Air Tem-
perature Setpoint. Smaller numbers make the Modulating Signal larger
per
°
F from the Active Supply Air Temperature Setpoint. Regardless
of how big the signal is per
°
F, the signal will not make a change until
the Time Period elapses. The Time Period is determines how long the
modulating signal holds its last position until it can move again. Short
Time Periods may cause hunting of the Modulating Signal.
Configuration Screen #18
VCM Cnfg ID 59
Mod Cooling
Output Signal.: 0
[0=0-10V 1=2-10V]
Enter a “0” for a 0-10 VDC signal to a Modulating Cool source such as
a Chilled Water Valve. Enter a “1” for a 2-10 VDC signal to a Chilled
Water Valve.
Configuration Screen #19
VCM Cnfg ID 59
Digital Compressor
Signal 1-5V : NO
[0=NO 1=YES]
If the HVAC unit is equipped with a Digital Compressor, enter a “1” for
“YES”.
Configuration Screen #20
VCM Cnfg ID 59
Mod Cooling
Rev Acting: NO
[0=NO 1=YES]
Enter a “1” for “YES” if the Modulating Cooling Source requires 0
VDC to open and 10 VDC to close. You cannot use a Reverse Acting
Signal if a Digital Compressor is being used.
Configuration Screen #21
VCM Cnfg ID 59
Mod Cooling
Prop. Window: 5 ° F
Time Period: 10 s
The Modulating Cooling Proportional Window is the control range of
the Modulating Signal above and below the Active Supply Air Tem-
perature Setpoint. Smaller numbers make the Modulating Signal larger
°
F from the Active Supply Air Temperature Setpoint. Regardless of
how big the signal is per
°
F, the signal will not change until the Time
Period elapses. The Time Period is the length of time between Modulat-
ing Signal adjustments. Short Time Periods may cause hunting of the
Modulating Signal.