Dettson SUPREME SUP10-M2401A, Installation Instructions And Homeowner'S Manual

6

Figure 6: 1-stage thermostat with outdoor control for 2-

stage function, electric heating only 

Figure 7: 1-stage thermostat, electric heat and cooling 

application 

Figure 8: 2-stage thermostat, electric heating and air 

conditioning 

2.5.2. 

Ducts and filters 

 
The ducts must be sized such a way as to accommodate the 
specified airflow and the available static pressure.  Refer to 
the applicable local and/or national installation codes. 
 
Insulate the ducts that lead through non-heated areas.  Use 
flexible supply and return air connectors to avoid the 
transmission of vibration.  To make the unit run even quieter, 
the installer should: 
1.  Use two elbows between each outlet and the supply and 

return air plenum; 

2.  Cover the vertical sections of the supply and return air 

duct with soundproofing material; 

3.  Use baffles in short radius elbows; 
4.  Use flexible hangers to suspend the ducts. 
 

The 

SUPREME

 furnace is equipped with a filter frame for the 

blower compartment.  It must be installed on the outside of 
one of the three sides or the bottom of the furnace.  Once 
the location of the installation has been determined, use the 
four square knockouts for ease of cutting the opening. 
 
A heat pump or an air conditioner can be added to this 
furnace, in either the supply or return air duct.  Carefully 
follow the instructions provided with these appliances to 
ensure proper installation and hook-up to the electric 
furnace.  Refrigerant and drainage pipes must in no way 
hinder access to the furnace panels. 

 
2.6 SUPPLY 

AIR 

ADJUSTMENTS

 
On units equipped with 4-speed blower motors, the supply 
air must be adjusted based on heating/air conditioning 
output and the static pressure of the duct system.  For the 
desired airflow, refer to the Table 1 and 2, as well as the 
Tables 4 and 5 for the airflow based on static pressure. 
 
For the adjustment of the airflow on heating mode, to obtain 
the temperature rise described in the technical specification 
table (Table 3), the red wire must be positioned on the 
terminal corresponding to the LOW, MED-LOW, MED-HIGH 
or HIGH blower speed.  Blower speeds are adjusted in 
factory for 0.5 inch static pressure. 
 
For the adjustment of the airflow on air-cooling mode, to 
obtain a sufficient airflow (350 to 450 CFM per Ton), the blue 
wire must be positioned on the terminal corresponding to the 
LOW, MED-LOW, MED-HIGH or HIGH blower speed.  
Blower speeds are adjusted in factory for 0.5 inch static 
pressure. 

Table 1: Supply air adjustment on heating mode 

FURNACE 

INPUT 

POWER 

KW 

HP 

MOTOR 

STATIC 

PRESSUR

E (in. w.c) 

RECOMMENDE

D BLOWER 

SPEED 

0.2 LOW 

SUP10 10  1/3 

0.5 LOW 
0.2 MED-LOW 

SUP15 15  1/3 

0.5 MED-LOW 
0.2 MED-LOW 

SUP18 18  1/3 

0.5 MED-LOW 
0.2 MED-LOW 

SUP20 20  1/3 

0.5 MED-HIGH 
0.2 MED-HIGH 

SUP23 23  1/3 

0.5 MED-HIGH 
0.2 MED-LOW 

SUP20 20  1.0 

0.5 MED-LOW 
0.2 MED-LOW 

SUP23 23  1.0 

0.5 MED-LOW 
0.2 MED-LOW 

SUP27 27  1.0 

0.5 MED-LOW 

Table 2: Supply air adjustment on air cooling mode 

FURNACE HP 

MOTOR 

COOLING 

CAPACITY  

(0.5” w.c.) 

RECOMMENDED  
BLOWER SPEED 

1.5 LOW 
2.0 MED-LOW 
2.5 MED-HIGH 

SUP10, 15, 18, 

20 and 23 

1/3 

3.0 HIGH 
2.5 LOW 
3.0 MED-LOW 
3.5 MED-HIGH 
4.0 HIGH 

SUP20, 23 and 

27 

1.0 

5.0 HIGH