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Installation Instructions
To adjust the circulator blower speed, proceed as follows:
1.
Turn OFF power to the furnace.
2.
Select the heating and cooling blower speeds that match the installation
requirements from Tables 3 & 4 - Air Delivery - CFM (Without Filter)*
3.
If it is necessary to change the default settings, follow the below table to
change SW3 dip-switch to set suitable fan speed.
Dip Switch Setting
ON
1 2 3
ON
1 2 3
ON
1 2 3
ON
1 2 3
ON
1 2 3
ON
1 2 3
ON
1 2 3
ON
1 2 3
Table 26
Selectable Fan Speeds
4.
Turn ON power to furnace.
5.
Verify proper temperature rise is as outlined in Temperature Rise section
and on the unit nameplate.
5 0 |
DIP SW
S3-1
S3-2
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
ON
ON
ON
ON
OFF
ON
OFF
FAN SPEED
S3-3
H-heat
OFF
4
ON
4
OFF
4
ON
4
ON
5
OFF
5
ON
5
OFF
5
Bosch 96% AFUE Condensing Gas Furnace - BTC 770503101 J (06.2023)
NOMINAL SPEED
L-heat
H-cool
2
2
2
3
3
3
3
5
3
3
3
4
3
5
3
5
L-cool
2
2
2
3
2
3
3
4
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