High Altitude - Lennox G60UH Service Manual

G60UH−60D−135 with 1 hp PERFORMANCE − Single Side Return Air − Air volumes in bold require field fabricated transition
to accommodate 20 x 25 x 1 in. (508 x 635 x25 mm) cleanable air filter in order to maintain proper air velocity.
External Static External Static
Pressure
in. w.g. Pa cfm
.00 0 2455
.10 25 2380
.20 50 2305
.30 75 2235
.40 100 2160
.50 125 2065
.60 150 1990
.70 175 1895
.80 200 1805
.90 225 1695
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.
HIGH ALTITUDE / MANIFOLD PRESSURE INFORMATION
0 − 4500 ft.
Model
(0 − 1372 m)
Input Input
Gas Gas
Size Required
Conversion Conversion
Kit
Nat. N/A
045/070−1 045/070−1
to −6
LPG 59M13
Nat. N/A
045/070−7 045/070−7
and later
LPG 59M13
Nat. N/A
090 1 to 6 090−1 to −6
LPG 59M13
Nat. N/A
090−7 and 090−7 and
later
LPG 59M13
Nat. N/A
110/135−1 110/135−1
to −6
LPG 59M13
Nat. N/A
110/135−7 110/135−7
and later
LPG 59M13
Pressure switch is factory set. No adjustment necessary. All models use the factory installed pressure switch from 0−4500 feet (0−1372 m).
1 − Conversion requires 2 pressure switches
BLOWER DATA Cont.
Air Volume / Watts at Different Blower Speeds
High Medium−High
L/s Watts cfm
1160 1336 2170
1125 1299 2140
1085 1266 2105
1055 1234 2045
1020 1240 1985
975 1170 1925
940 1146 1870
895 1111 1775
850 1074 1680
800 1042 1590

HIGH ALTITUDE

Altitude
4,501 − 7500 ft.
(1373 − 2286 m)
Required
Pressure Pressure
Conversion Conversion
Switch
Kit
N/A N/A
N/A 59M13
N/A N/A
N/A 59M13
N/A N/A
N/A 59M13
N/A N/A
N/A 59M13
N/A N/A
N/A 59M13
N/A N/A
N/A 59M13
Medium−Low
L/s Watts cfm
1025 1019 1850
1010 974 1840
995 947 1830
965 914 1820
935 886 1800
910 863 1745
880 844 1700
835 808 1655
790 779 1565
750 752 1480
7501−10,000 ft.
(2286 − 3048 m)
Required
1
Pressure Pressure
Conversion Conversion
Switch
Kit
N/A 59M16
N/A 59M14
N/A 59M17
N/A 59M14
18M61 59M16
18M61 59M14
18M61 59M17
18M61 59M14
18M63 59M16
18M63 59M14
18M63 59M17
18M63 59M14
Page 10
L/s Watts cfm
875 829 1555
870 812 1550
865 791 1545
860 774 1540
850 755 1540
825 726 1535
800 706 1505
780 689 1465
740 656 1425
700 630 1335
Manifold Pressure
at all altitudes t ll ltit d
Low Fire
1
Pressure 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
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
18M61 1.7 0.42
18M61 4.9 1.22
Low
L/s Watts
735 673
730 664
730 656
725 642
725 628
725 614
710 599
690 573
670 562
630 533
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