Lennox LHT Series Service Manual page 40

Economizer
MS7110K RANGE 2−10 VDC
NF24−SR
AF24−SR RANGE 2−10 VDC
P3
3 7 9
P384
J384
8 1 1 0 3 9
A55
MAIN CTRL
Model: LC, LG, LH, LD Series RTU
Economizer & Motorized OAD
Voltage: All Voltages
Supersedes: N/A Form No:
8
1
P104 P105
RT16
J104 J105
1 4 1 2
2 1 1 4 12 5 1 3
HTG CLG CLG
SEC SEC SEC
A B
WI R I N G D I A GRAM F LOW
538072−01
Rev:1
Page 40
1,2
1 2 3
6 14 7
ACCS ACCS
SEC SEC
B3 C D