Lennox LGH420 Installation Instructions

Page 30
BLOWER DRIVE KITS
HIGH STATIC POWER EXHAUST BLOWERS - DRIVE KIT SPECIFICATIONS
Nominal
hp
per blower
1
Maximum
hp
per blower
RPM Range
3
Adjustable
Drive Kit Number
50% Applications
Rear Position
2
100% Applications
Order One Each:
Front Position Rear Position
3 3.45
735-920 6(A)-B35 6(B)-B36 6(A)-B35
690-845 5(A)-B35 5(B)-B36 5(A)-B35
5 5.75
795-975 3(A)-B35 3(B)-B36 3(A)-B35
735-920 4(A)-B35 4(B)-B36 4(A)-B35
7.5 8.63
850-1065 1(A)-B35 1(B)-B36 1(A)-B35
820-980 2(A)-B35 2(B)-B36 2(A)-B35
1
In VFD applications, nominal motor output is also maximum usable motor output.
2
Two drive kits are required for the same rpm, one for the front blower position and one for the rear blower position because of different belt length requirements.
3
Adjustable motor pulleys are factory set for maximum RPM in VFD applications.
VARIABLE FREQUENCY DRIVE KIT SPECIFICATIONS
Nominal
hp
Maximum
hp
Drive Kit
Number
RPM Range
(Adjustable Pulley)
5 5.75
1 510 - 640
2 630 - 760
7.5 8.63
3 635 - 770
4 750 - 905
10 11.5
5 670 - 825
4 750 - 905
6 880 - 1050
15 17.25
7 745 - 900
8 875 - 1045
9 965 - 1190
20 23
10 825 - 1020
11 1010 - 1240
25 28.75
12 930 - 1085
13 1075 - 1285
30 34.5
13 1075 - 1285
14 1150 - 1340
NOTE - Using total air volume and system static pressure requirements determine from blower performance tables rpm and motor output required. Maximum usable
output of motors furnished are shown. In Canada, nominal motor hp is also maximum usable motor hp. If motors of comparable output are used, be sure to keep within
the service factor limitations outlined on the motor nameplate.
For Variable Frequency Drive applications, nominal motor output is also maximum usable motor output.

Lennox LGH420 Specifications

General

Brand	Lennox
Model	LGH420
Category	Air Conditioner
Language	English