High Altitude - Lennox 80UGH Unit Information

External Static External Static
Pressure
in. w.g. Pa
0 0
.05 12
.10 25
.15 37
.20 50
.25 62
.30 75
.40 100
.50 125
.60 150
.70 175
NOTE All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished) in place. Also see Filter Air Resistance table
Refer to table below for manifold pressure settings for
Installations at different altitudes and different fuels.
NOTE−In Canada, certification for installations over
4500 ft. (1372m) above sea level is the jurisdictionof
the local authorities.
Manifold Absolute Pressure in. w.c. (kPa)
ALTITUDE ft. (m)
0−4500 4500−5500
FUEL
(0−1372) (1372−1676)
NAT 3.5 (0.87) 3.4 (0.85)
LP 9.5 (2.36) 9.2 (2.29)
BLOWER DATA
80UHG4/5-100 AND 80UHG4/5-120 BLOWER PERFORMANCE
High Medium-High
cfm L/s cfm
2450 1155 2160
2440 1150 2155
2430 1145 2150
2415 1140 2135
2400 1135 2120
2380 1125 2105
2360 1115 2090
2310 1090 2050
2260 1065 2000
2180 1030 1950
2100 990 1890
FILTER AIR RESISTANCE
cfm (L/s)
0 (0)
200 (95)
400 (185)
600 (280)
800 (375)
1000 (470)
1200 (560)
1400 (655)
1600 (750)
1800 (845)
2000 (935)
2200 (1030)
2400 (1125)
2600 (1220)
HIGH ALTITUDE DERATE
5500−6500 6500−7500
(1676−1981) (1982−2286)
3.3 (0.82) 3.2 (0.80)
8.9 (2.21) 8.6 (2.14)
Air Volume at Various Blower Speeds
Medium
L/s cfm L/s
1020 1970 930
1015 1965 925
1015 1960 925
1010 1950 920
1000 1940 915
995 1930 910
985 1915 905
965 1870 880
945 1810 855
920 1750 825
890 1700 800
in. w.g. (Pa)
0.00 (0)
0.01 (2)
0.03 (7)
0.04 (10)
0.06 (15)
0.09 (22)
0.12 (30)
0.15 (37)
0.19 (47)
0.23 (57)
0.27 (67)
0.33 (82)
0.38 (95)
0.44 (110)
The combustion air inducer prove switches are factory
set and are not to be adjusted.
At elevations of 4500 ft. (1372m) or greater, change factory
installed pressure switch to switch listed in table below.
UNIT MODEL
80UHG−45
80UHG−60
80UHG−75
80UHG−100
80UHG−120
Page 4
Medium-Low Low
cfm L/s cfm
1700 800 1500
1695 800 1500
1690 800 1495
1685 795 1495
1680 795 1490
1675 790 1480
1670 790 1470
1650 780 1440
1610 760 1410
1560 735 1370
1520 715 1330
PRESSURE SWITCH
PART NUMBER
NO CHANGE
NO CHANGE
88J8001
18L2401
18L2401
L/s
710
710
705
705
705
700
695
680
665
645
630