Filter Air Resistance; High Altitude - Lennox G60UHV Service Manual

G60UHV−60D−135 BLOWER PERFORMANCE
0 through 0.80 in. w.g. (0 Through 200 Pa) External Static Pressure Range
Single Side Return Air − Air volumes in bold require field fabricated transition to accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) clean-
able air filter in order to maintain proper air velocity across the filter.
Blower Control Factory Settings
ADJUST"
Switch
1
Positions
cfm
+" (Plus) 1415
NORM (Normal) 1285
" (Minus) N/A
ADJUST"
Switch 1
Positions
cfm
+" (Plus) 1300
NORM (Normal) 1180
" (Minus) N/A
NOTES − The effect of static pressure and filter resistance is included in air volumes shown.
1st stage HEAT is approximately 91% of the same 2nd stage HEAT speed position.
1st stage COOL (two speed air conditioning units only) is approximately 70% (65% for units built prior to 09−2002) of the same 2nd stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same 2nd stage COOL speed position.
Lennox Harmony IIt zone control applications − Minimum blower heating speed is approximately 75% of the 1st stage HEAT speed position.
Lennox Harmony IIt zone control applications − Minimum blower cooling speed is approximately 45% of the 2nd stage COOL speed position.
N/A − 1st stage HEAT, speed position 1 with
cfm
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
Model
Input
Gas
Required
Size
Conversion
Kit
Nat. N/A
070−1 to −6
LPG 59M13
Nat. N/A
090−1 to −6
LPG 59M13
Nat. N/A
110/135−1 to
−6
LPG 59M13
Nat. N/A
070−7 and
later
LPG 59M13
Nat. N/A
090−7 and
later
LPG 59M13
Nat. N/A
110/135−7
and later
LPG 59M13
Pressure switch is factory set. No adjustment necessary. All models use the factory installed pressure switch from 0−4500 feet (0−1370 m).
ADJUST − NORM
HEAT − 2
COOL − 4
2nd Stage HEAT" Speed
2 3
L/s cfm L/s cfm
665 1625 765 1820
605 1475 695 1655
N/A 1330 625 1490
1st Stage HEAT" Speed
2 3
L/s cfm L/s cfm
615 1480 700 1660
555 1345 635 1510
N/A 1210 570 1360
" (Minus) Adjust" setting, cannot be used with this model.

FILTER AIR RESISTANCE

L/s
0
95
190
285
380
470
565
660
755
850
945
1040
1130
1225
0 − 4500 ft. 4,501 − 7500 ft.
(0 − 1372 m) (1373 − 2286 m)
Required
Pressure
Conversion
Switch
Kit
No Change N/A
No Change 59M13
No Change N/A
No Change 59M13
No Change N/A
No Change 59M13
No Change N/A
No Change 59M13
No Change N/A
No Change 59M13
No Change N/A
No Change 59M13
BLOWER DATA
Speed Switch Positions
4 1
L/s cfm L/s cfm
860 2015 950 1525
780 1830 865 1385
705 1645 775 1245
4 1
L/s cfm L/s cfm
785 1850 875 965
715 1680 795 885
640 1510 715 795
in. w.g.
0.00
0.01
0.03
0.04
0.06
0.09
0.12
0.15
0.19
0.23
0.27
0.33
0.38
0.44

HIGH ALTITUDE

Altitude
7501−10,000 ft.
(2286 − 3048 m)
Required
Pressure
Conversion
Switch
Kit
No Change 59M16
No Change 59M14
18M61 59M16
18M61 59M14
18M63 59M16
18M63 59M14
No Change 59M17
No Change 59M14
18M61 59M17
18M61 59M14
18M63 59M17
18M63 59M14
Page 7
2nd Stage COOL" Speed
2 3
L/s cfm L/s cfm
720 1650 780 1875
655 1500 710 1705
590 1350 635 1535
1st Stage COOL" Speed
2 3
L/s cfm L/s cfm
455 1070 504 1215
417 975 460 1105
375 870 410 995
Manifold Pressure
at all altitudes
Low Fire
Pressure
Switch
in. w.g. kPa
18M64 1.7 0.42
18M64 4.9 1.22
18M64 1.7 0.42
18M64 4.9 1.22
18M61 1.7 0.42
18M61 4.9 1.22
18M64 1.7 0.42
18M64 4.9 1.22
18M64 1.7 0.42
18M64 4.9 1.22
18M61 1.7 0.42
18M61 4.9 1.22
4
L/s cfm L/s
885 2095 990
805 1905 900
725 1715 810
4
L/s cfm L/s
573 1345 634
521 1225 578
469 1115 526
Pa
0
0
5
10
15
20
30
35
45
55
65
80
95
110
High Fire
in. w.g. kPa
3.5 0.87
10.0 2.5
3.5 0.87
10.0 2.5
3.5 0.87
10.0 2.5
3.5 0.87
10.0 2.5
3.5 0.87
10.0 2.5
3.5 0.87
10.0 2.5