
APPENDIX B
PREHEAT-X Technical Guide
26
PREHEAT-X BACnet
®
Points
BACnet
®
Properties for the PREHEAT-X
PARAMETER OBJECT DESCRIPTION LIMITS
Active
Controlling
Setpoint
AI: 1 The current Active
Controlling Setpoint
Read Only
Number of
Heat Stages
On
AI:2 The current number of heat
stages on
Read Only
Modulating
Output
Position
AI: 3 The current Modulating
Output Position
Read Only
All Alarms
Bitfi eld
AI: 4 The current Alarm Status
in a Bitfi eld
Read Only
See Alarm
Bits, this page.
Entering Air
Temperature
AI: 5 The current Entering Air
Temperature
Read Only
Leaving Air
Temp Sensor 1
AI:6 The current Leaving Air
Sensor 1 Temperature
Read Only
Leaving Air
Temp Sensor 2
AI:7 The current Leaving Air
Sensor 2 Temperature
Read Only
Leaving Air
Average Temp
AI: 8 The current Average
Leaving Air Temperature
Read Only
Reset Input
Percentage
AI:9 The current Setpoint Reset
Input Percentage
Read Only
Enable Input
Value
BI: 1 The current value of the
Enable Binary Input
Read Only
0 = Off
1 = On
Shutdown
Input Value
BI: 2 The current value of the
Emergency Shutdown
Binary Input
Read Only
0 = Off
1 = On
Preheat Enable
Status
BI: 3 The current Enable status
of the controller
Read Only
0 = Off
1 = On
Alarm Relay
Status
BI: 4 The current status of the
Alarm Relay
Read Only
0 = Off
1 = On
Heat 1 Relay
Status
BI: 5 The current status of the
Heat 1 Relay
Read Only
0 = Off
1 = On
Heat 2 Relay
Status
BI: 6 The current status of the
Heat 2 Relay
Read Only
0 = Off
1 = On
Heat 3 Relay
Status
BI: 7 The current status of the
Heat 3 Relay
Read Only
0 = Off
1 = On
Heat 4 Relay
Status
BI: 8 The current status of the
Heat 4 Relay
Read Only
0 = Off
1 = On
Heat 5 Relay
Status
BI: 9 The current status of the
Heat 5 Relay
Read Only
0 = Off
1 = On
Heat 6 Relay
Status
BI: 10 The current status of the
Heat 6 Relay
Read Only
0 = Off
1 = On
BACnet
®
Properties for the PREHEAT-X
PARAMETER OBJECT DESCRIPTION LIMITS
Emergency
Shutdown
Alarm
BI: 11 The current Emergency
Shutdown Alarm status
Read Only
0 = Off
1 = On
Leaving Air
Sensor 1
Alarm
BI: 12 The current Leaving Air
Sensor 1 Alarm status
Read Only
0 = Off
1 = On
Leaving Air
Sensor 2
Alarm
BI: 13 The current Leaving Air
Sensor 2 Alarm status
Read Only
0 = Off
1 = On
Low Leaving
Air Temp
Alarm
BI: 14 The current Low Leaving
Air Temp Alarm status
Read Only
0 = Off
1 = On
High Leaving
Air Temp
Alarm
BI: 15 The current High Leaving
Air Temp Alarm status
Read Only
0 = Off
1 = On
Entering Air
Sensor Alarm
BI: 16 The current Entering Air
Sensor Alarm status
Read Only
0 = Off
1 = On
Remote Enable AV: 1 Enables the Preheat from
the BACnet front end
Read / Write
Volatile
0 = Disabled
1 = Enabled
Remote
Leaving Air
Setpoint
AV: 2 Controlling Leaving Air
Setpoint from the BACnet
front end
Read/ Write
Volatile
35.0 ºF
90.0
ºF
Remote
Entering
Air Enable
Setpoint
AV: 3 Entering Air Enable
Setpoint from the BACnet
Front end
Read / Write
Volatile
-40.0
ºF
90.0
ºF
PREHEAT-X BACnet
®
Property
Identifi er
BACNETPropertyIdentifi er :
AllAlarmGroup1Bits ::= BIT STRING {
Reserved (0),
BadLeavingAir1 (1),
BadLeavingAir2 (2),
LowLeavingAir (3),
HighLeavingAir (4),
Reserved (5),
BadEnteringAir (6),
CommAlarm (7),
ShutDownAlarm (8)
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