Thermo Pride Gas/Propane Furnace with ECM Blower CHX3 User Manual
Page 7
All installations and services must be performed by qualified service personnel.
5
B. CFM TABLES
The following tables contain blower speed settings and their respective airflow rates for the ECM blower motor. To
change airflow rates from that of the shipped settings, use the respective S3 and S4 dip switches on the furnace’s
integrated control board (see Figure 1).
S4 DIP SWITCH - HEATING SPEED SELECTIONS
NOTE: Electrical data provided for Ultratech motor
0.2
0.5
0.2
0.5
S4-3 OFF
S4-4 OFF
760
60
1.4 / 109
2.1 / 175
931
70
2.0 / 163
2.8 / 239
S4-3 ON
S4-4 OFF
708
65
1.2 / 95
1.9 / 154
867
75
1.7 / 138
2.4 / 205
S4-3 OFF
S4-4 ON
826
55
1.7 / 132
2.3 / 195
1012
65
2.3 / 197
3.1 / 269
S4-3 ON
S4-4 ON
909
50
1.9 / 155
2.7 / 227
1114
59
2.8 / 238
3.3 / 289
0.2
0.5
0.2
0.5
S4-3 OFF
S4-4 OFF
1015
60
1.8 / 151
2.7 / 230
1243
70
2.6 / 221
3.6 / 314
S4-3 ON
S4-4 OFF
947
64
1.7 / 136
2.4 / 206
1160
75
2.3 / 192
3.2 / 278
S4-3 OFF
S4-4 ON
1094
56
2.1 / 180
3.0 / 258
1340
65
2.1 / 269
4.2 / 374
S4-3 ON
S4-4 ON
1184
51
2.4 / 209
3.4 / 299
1450
60
3.7 / 327
4.7 / 428
0.2
0.5
0.2
0.5
S4-3 OFF
S4-4 OFF
1270
60
2.9 / 247
3.8 / 343
1556
70
4.5 / 406
5.5 / 508
S4-3 ON
S4-4 OFF
1185
64
2.5 / 218
3.4 / 300
1452
75
3.9 / 354
4.7 / 436
S4-3 OFF
S4-4 ON
1366
56
3.4 / 294
4.4 / 385
1673
65
5.3 / 481
6.3 / 581
S4-3 ON
S4-4 ON
1480
51
3.9 / 354
4.9 / 431
1813
60
6.3 / 580
7.5 / 693
=FACTORY SETTING
CHX3-125
Dip sw itch
settings
Low fire
CFM
Rise (
o
F)
Static Pressure (Amps /
Watts)
High Fire
CFM
Rise (
o
F)
Static Pressure (Amps /
Watts)
CHX3-100
Dip sw itch
settings
Low fire
CFM
Rise (
o
F)
Static Pressure (Amps /
Watts)
High Fire
CFM
Rise (
o
F)
Static Pressure (Amps /
Watts)
CHX3-75
Dip sw itch
settings
Low fire
CFM
Rise (
o
F)
Static Pressure (Amps /
Watts)
High Fire
CFM
Rise (
o
F)
Static Pressure (Amps /
Watts)