Thermo Products MG-1018 operation manual B. Cfm Tables

All installations and services must be performed by qualified service personnel.

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).

HEATING SPEEDS

CDX1-75

Dip
switch		Rise (oF)	High Fire	Rise (oF)
settings	Low fire CFM		CFM
7-OFF
8-OFF	760	64	931	70
7-ON
8-OFF	708	69	867	75
7-OFF
8-ON	826	59	1012	65
7-ON
8-ON	909	54	1114	59

CHX1-75

Dip
switch		Rise (oF)	High Fire	Rise (oF)
settings	Low fire CFM		CFM
7-OFF
8-OFF	760	60	931	70
7-ON
8-OFF	708	65	867	75
7-OFF
8-ON	826	55	1012	65
7-ON
8-ON	909	50	1114	59

CDX1-100

Dip			High Fire
switch		Rise (oF)		Rise (oF)
settings	Low fire CFM		CFM
7-OFF
8-OFF	1015	64	1243	70
7-ON
8-OFF	947	69	1160	75
7-OFF
8-ON	1094	60	1340	65
7-ON
8-ON	1184	55	1450	60
		CDX1-125
Dip
switch		Rise (oF)	High Fire	Rise (oF)
settings	Low fire CFM		CFM
7-OFF
8-OFF	1270	64	1556	70
7-ON
8-OFF	1185	69	1452	75
7-OFF
8-ON	1366	60	1673	65
7-ON
8-ON	1480	55	1813	60

CHX1-100

Dip
switch		Rise (oF)	High Fire	Rise (oF)
settings	Low fire CFM		CFM
7-OFF
8-OFF	1015	60	1243	70
7-ON
8-OFF	947	64	1160	75
7-OFF
8-ON	1094	56	1340	65
7-ON
8-ON	1184	51	1450	60
		CHX1-125
Dip
switch		Rise (oF)	High Fire	Rise (oF)
settings	Low fire CFM		CFM
7-OFF
8-OFF	1270	60	1556	70
7-ON
8-OFF	1185	64	1452	75
7-OFF
8-ON	1366	56	1673	65
7-ON
8-ON	1480	51	1813	60

=FACTORY SHIPPED SETTINGS

4