Thermo Pride Gas/Propane Furnace ECM CHX1 - Manual (Page 6)

All installations and services must be performed by qualified service personnel.
4
B. CFM TABLES
The following tables contain blower speed settings and their respective air flowrates for the ECM blower motor. To
change air flowrates from that of the shipped settings, use the respective S3 and S4 dipswitches on the furnace’s
integrated control board (see Figure 1).
Dip
switch
settings Low fire CFM Rise ( o F)
High Fire
CFM Rise ( o F)
Dip
switch
settings Low fire CFM Rise ( o F)
High Fire
CFM Rise ( o F)
7-OFF
8-OFF
760 64 931 70
7-OFF
8-OFF
760 60 931 70
7-ON
8-OFF
708 69 867 75
7-ON
8-OFF
708 65 867 75
7-OFF
8-ON
826 59 1012 65
7-OFF
8-ON
826 55 1012 65
7-ON
8-ON
909 54 1114 59
7-ON
8-ON
909 50 1114 59
Dip
switch
settings Low fire CFM Rise ( o F)
High Fire
CFM Rise ( o F)
Dip
switch
settings Low fire CFM Rise ( o F)
High Fire
CFM Rise ( o F)
7-OFF
8-OFF
1015 64 1243 70
7-OFF
8-OFF
1015 60 1243 70
7-ON
8-OFF
947 69 1160 75
7-ON
8-OFF
947 64 1160 75
7-OFF
8-ON
1094 60 1340 65
7-OFF
8-ON
1094 56 1340 65
7-ON
8-ON
1184 55 1450 60
7-ON
8-ON
1184 51 1450 60
Dip
switch
settings Low fire CFM Rise ( o F)
High Fire
CFM Rise ( o F)
Dip
switch
settings Low fire CFM Rise ( o F)
High Fire
CFM Rise ( o F)
7-OFF
8-OFF
1270 64 1556 70
7-OFF
8-OFF
1270 60 1556 70
7-ON
8-OFF
1185 69 1452 75
7-ON
8-OFF
1185 64 1452 75
7-OFF
8-ON
1366 60 1673 65
7-OFF
8-ON
1366 56 1673 65
7-ON
8-ON
1480 55 1813 60
7-ON
8-ON
1480 51 1813 60
=FACTORY SHIPPED SETTINGS
CDX1-125 CHX1-125
HEATING SPEEDS
CDX1-75 CHX1-75
CDX1-100 CHX1-100