Lennox LGH120H4M User Manual

Page 53
charge. Note that suction pressure can change as
charge is adjusted.
7- Example LGH/LCH150 Circuit 1: At 95°F outdoor am
bient and a measured suction pressure of 130psig, the
target liquid temperature is 96°F. For a measured liquid
temperature of 106°F, add charge in increments until
measured liquid temperature agrees with the target liq
uid temperature.
TABLE 20
LGH/LCH150S Normal Operating Pressures - Fin/Tube - RFC
Outdoor Coil Entering Air Temperature
65 °F 75 °F 85 °F 95 °F 105 °F 115 °F
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
Suct
(psig)
Disc
(psig)
Circuit 1
108 253 112 295 114 338 117 384 119 438 122 501
114 255 119 296 122 342 125 390 127 444 129 501
119 257 129 303 136 348 141 403 145 460 149 522
125 264 136 308 146 358 155 413 161 470 167 530
Circuit 2
108 273 111 314 114 356 117 400 119 451 121 508
115 277 119 318 122 362 125 409 128 460 129 512
124 284 131 327 137 372 141 422 145 474 147 532
131 289 140 334 148 382 155 434 160 486 163 541
Suction Pressure (psig)
115°
105°
95°
85°
75°
65°
60
70
80
90
100
110
120
130
100 110 120 130 140 150 160 170
Liquid Temperature (° F)
LGH/LCH150S Charging Curves - Fin/Tube - RFC
Circuit 1
Circuit 2
Outdoor Temperature (°F)

Lennox LGH120H4M Specifications

General

Brand	Lennox
Model	LGH120H4M
Category	Air Handlers
Language	English