Lennox LHT/LDT024 Installation Instructions Manual page 44

Air Flow Proving
Switch (S52)
Not Installed = N
Installed on M4 = C
Installed on DDC Controller = D
Dirty Filter Switch (S27) [2]
Not Installed = N
Installed on M4 = C
Installed on DDC Controller = D
Overflow Switch
(S149 / S179)
Not Installed = N
Installed = Y
Reserved
Reserved for future use = N
Phase / Voltage Detection * [5]
Not Installed = N
Enabled Internal (Lennox) = 1
External (A42) Phase Detection = 2
External (A42) Phase Detection = 3
* When phase detection and voltage monitoring is enabled and wired incorrectly,
the system will go into demand hold status and restart after six minutes.
Configuration ID 2
1 2 3 4 5 6 7 8 9 10
[1]
[3]
[4]
on DI-2
on DI-3
FIGURE 36
Page 44
[10] Reserved
N = Not Installed
[9] Electric Heat
(Field-Installed)
N = Not Installed
Y = Installed
[8] Load Shedding
N = Not Installed
G = Global (P297 - pin 9)
2 = Installed on DI-2
3 = Installed on DI-3
[7] Zone Bypass
Damper
N = Not Installed
Y = Installed
[6] IAQ Options
N = Not Installed
1 = UV Lamp Installed
2 = Bipolar Ionizer Installed
3 = UV Lamp and
Bipolar Ionizer Installed
LHT/LDT024, 036, 048, 060