Lennox LGH 072 User Manual

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Connection Failure
Control following a connection failure depends on where the failure occurs, and which input device has been used.
Between Unit Controller and LonTalk Module LonWorks Network
Lennox
Zone
Sensor
1− During the 5 minutes following a failure, the unit controller cycles
on last setpoint.
2− Unit controller resets. No heating or cooling during 2 minutes
(ECTO 5.25) following reset.
3− Unit controller cycles based on ECTO backup setpoints.
4− Occupancy is determined by hardware input at TB1 ( for M1), or
Prodigy setup (for M2).
1− Unit controller cycles on last setpoint.
2 − Last occupancy input is used.
LonTalk
Zone
Sensor
1− During 5 minutes following failure, the unit controller continues cur-
rent operation: heat, cool, or off.
2− Unit controller resets. No heating or cooling during 5 minutes fol-
lowing reset.
3− Unit controller uses ECTO backup setpoints.
4− Unit controller attempts to use Lennox zone sensor as backup. If
this fails, Unit controller uses return air sensor backup.
5− Occupancy is determined by hardware input at TB1 ( for M1), or
Prodigy setup (for M2).
1− During 5 minutes following failure, Unit con-
troller continues current operation: heat,
cool, or off.
2− Unit controller uses ECTO backup set-
points.
3− Unit controller attempts to use Lennox zone
sensor as backup. If this fails, Unit controller
uses return−air−sensor backup.
4 − Last occupancy input is used.
Network Variables − See BACnet Module Service Literature.
Alarm Codes See the Unit Controller user guide for a list of alarm codes.

Lennox LGH 072 Specifications

General

Brand	Lennox
Model	LGH 072
Category	Air Conditioner
Language	English