24 AGZ 025D through 190D OMM 1087
Enum Status Conditions
6 Off:Keypad Disable Unit State = Off and Unit Enable Set Point = Disable
7 Off:Remote Switch Unit State = Off and Remote Switch is open
8 Off:BAS Disable
Unit State = Off, Control Source = Network, and BAS Enable =
false
9 Off:Unit Switch Unit State = Off and Unit Switch = Disable
10 Off:Test Mode Unit State = Off and Unit Mode = Test
11 Auto:Wait for load
Unit State = Auto, no circuits running, and LWT is less than the
active set point + startup delta
12 Auto:Evap Recirc Unit State = Auto and Evaporator State = Start
13 Auto:Wait for flow
Unit State = Auto, Evaporator State = Start, and Flow Switch is
open
14 Auto:Pumpdown Unit State = Pumpdown
15 Auto:Max Pulldown Unit State = Auto, max pulldown rate has been met or exceeded
16 Auto:Unit Cap Limit Unit State = Auto, unit capacity limit has been met or exceeded
17
Auto: High Ambient Limit
---
18
Config Changed, Reboot
Required
A configuration change requiring a reboot has occurred but
controller has not been rebooted yet.
Evaporator Pump Control
For control of the evaporator pumps, three evaporator pump control states should be used:
Off - No pump on.
Start – Pump is on, water loop is being recirculated.
Run – Pump is on, water loop has been recirculated and circuits can start if needed.
Transitions between these states are shown in the following diagram.
T
3
T
4
T
1
T1 – Off to Start
Requires any
of the following
Unit state = Auto
LWT is less than the Evap Freeze set point – 0.6°C (1.1°F) and LWT sensor fault isn’t active
T2 – Start to Run
Requires the following
Flow ok for time longer than evaporator recirculate time set point
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