Configuration
Configuring The Controller
Figure 36: Analog Output #4 Screen
1
2
3
6
4
7
5
Analog Output #4
In this example Analog Output #3 is configured for the “Mod Heating”
output. In
Figure 36
Item #1 it indicates it has a Control Type of “Reverse
Acting Floating Point”.
Item #2 indicates the Control Source for this relay will be the Tower
Return Water Temperature (“TW Return”) on AIN2. Item #3 indicates
that the “Max Setpoint” will be 62.0° F and the “Deadband” will be
3.0° F.
Item #4 Shows the Enabling Relay to be the “System Active” output
configured on (Relay #8). This means that in addition to the “TW Return”
temperature being above setpoint the “System Active” relay must also
be activated for the “Mod Heating” to modulate.
Item #5 Shows the Enabling Binary Input to be the “System POF” input
configured on (BIN2). This means that in addition to the previous re
-
quirements (BIN2) must also be active for “Mod Heating” to modulate.
Item #6 indicates it has Output Limits of :
Max Voltage = 10.0 VDC
Min Voltage = 2.0 VDC.
Item #7 shows that its calculation settings are:
Calculation Interval (Controls Speed) = 3.0 Sec
Proportional Control Window = 1.0° F
With this configuration sequence the “Mod Heating” will modulate
towards 100% (10 VDC) when the “TW Water” temperature (AIN2) is
3.0° F below the 62.0° F setpoint (59.0° F) the “System Active” (Relay
#8) output is active and the “System POF” (BIN2) input is active.
When the “TW Water” temperature” (AIN2) is between 65.0° F and 59.0°
F the “System Active” (Relay #2) output is active and the “System POF”
(BIN2) input is active, the “Mod Heating” will maintain its modulation
percentage at a constant level.
The “Mod Heating” will modulate its speed towards 0% (2 VDC) when
the “TW Return “ temperature” (AIN2) is 3.0° F above the 62.0° F
setpoint (65.0° F) the “System Active” (Relay #8) output is active and
the “System POF” (BIN2) input is active.
36
WSHP Loop Controller
GPC-XP Guide