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3.4 AIRFLOW 

VERIFICATION

 

 
Verify the airflow by taking readings of the following points, 
while the elements are in the heating mode: 

 

 

Total amperage of all the heating elements; 

 

Voltage at the furnace; 

 

Supply air temperature.  The point of the reading must 
not be affected by radiant heat from the elements; 

 

Return air temperature. 

 

From these readings, one can arrive at an approximate 
calculation of the average airflow.  To do that, the following 
formulae should be used: 

 

 

 

0.82 x amps. x volts 

Liter/s= ------------------------- 
  

Diff. 

temperature 

˚C 

 
 

 

3.1 x amps. x volts 

CFM =  ------------------------ 
  

Diff. 

temperature 

˚F 

 

3.4.1. 

Supply Air Temperature Rise Test

 

 

1)  Operate the unit at maximum power for at least 10 

minutes; 

2)  Measure the air temperature in the return air plenum; 
3)  Measuring the air temperature in the largest trunk 

coming off the supply air plenum, just outside the 
range of radiant heat from the heat exchanger.  0.3 m 
(12”) from the plenum of the main take-off is usually 
sufficient; 

4)  The temperature rise is calculated by subtracting the 

return air temperature from the supply air temperature. 

 

If the temperature rise exceeds the temperature specified in 
Table 1, p.10, change to the next higher blower speed tap, until 
the temperature rise falls to the target or below.  If the excessive 
temperature rise cannot be reduced by increasing fan speed, 
investigate for ductwork obstructions or dirty and improper air 
filter. 
 

CAUTION 

 

It is important to check the airflow and to ascertain that the unit 
does not operate above the temperatures specified in the 
Technical Specifications (Table 1).  This is particularly important 
if a cooling coil or a heat pump has been installed in the ducts. 

 

Hi-Limit thermal protectors should never need to engage during 
the normal functioning of the appliance.  They are strictly 
designed to engage during the improper functioning of the 
blower or when the filter was improperly maintained. 

 

 

3.4.2. 

High limit verification

 

 

After operating the furnace for at least 15 minutes, restrict the 
return air supply by blocking the filters or the return air register 
and allow the furnace to shut off on High Limit.  The electric 
heaters must deactivate themselves one by one before the 
warm air temperature exceeds 200˚F 
 
Remove the obstruction and the elements should restart after a 
few minutes. 

 

4 MAINTENANCE

 

 

WARNING 

 

Electrical shock hazard. 

 

Turn OFF power to the furnace before any disassembly or 
servicing. 

 

Failure to do so can result in death, bodily injury and/or 
property damage.

 

 
Preventive maintenance is the best way to avoid unnecessary 
expense and inconvenience.  Have your heating system 
inspected by a qualified service technician at regular intervals.  
Do not attempt to repair the furnace or its controls.  Call a 
qualified service technician. 
 
Before calling for repair service, check the following points: 

 

1)  Check fuses or the circuit breaker; 
2)  Check if the 15 A circuit breaker on the furnace is 

disengaged; 

3)  Set the thermostat higher than room temperature.  If 

the unit does not start up, cut the power and call la 
qualified service technician. 

 

When calling for service or ordering a replacement part, specify 
the model and serial number of your appliance. 
 

4.1 AIR 

FILTER

 

 
The filter supplied with the unit is the disposable type and 
should be replaced twice a year.  The presence of animal hair, 
dust, etc. may necessitate more frequent changes.  Dirty filters 
have an adverse effect on the performance of the central 
heating system. 
 

4.2 MOTOR 

LUBRICATION

 

 
Do not lubricate the blower motor, since it is permanently 
lubricated. 

Summary of Contents for FEM10-M2301CM-B

Page 1: ...7 M2301DM B 2011 02 04 X40163 Rev D Fabriqu par Industries Dettson inc 3400 boulevard Industriel Sherbrooke Qu bec Canada J1L 1V8 DNS 0981 Rev A MULTI POSITION INSTALLATEUR TECHNICIEN UTILISER LES REN...

Page 2: ...DE FONCTIONNEMENT 7 3 3 UTILISATION DES COMMANDES MANUELLES SUR LA FOURNAISE 7 3 4 V RIFICATION DU D BIT D AIR 8 4 ENTRETIEN 8 4 1 FILTRE AIR 8 4 2 LUBRIFICATION DU MOTEUR 8 5 INFORMATION 9 TABLEAUX...

Page 3: ...conforme aux codes nationaux qui s appliquent Les renseignements contenus dans ce manuel s adressent un technicien qualifi exp riment dans ce type de travail au courant des pr cautions prendre des r...

Page 4: ...t de 0 pouce par rapport aux mat riaux combustibles Pour les fournaises d une puissance de 23 kW et plus les conduits d alimentation en air doivent tre install s avec un d gagement de 1 pouce par rapp...

Page 5: ...rre ininterrompue pour minimiser les risques de blessures corporelles si jamais un probl me lectrique se produisait Un connecteur de mise la terre est inclus dans la bo te de contr le pour effectuer c...

Page 6: ...es du r frig rant et de vidange ne devraient aucunement nuire l enl vement des panneaux d acc s de la fournaise 2 6 AJUSTEMENT DES D BITS D AIR DE VENTILATION Sur les unit s quip es de moteur de venti...

Page 7: ...trique principal ON 3 2 S QUENCE DE FONCTIONNEMENT Mode chauffage 1 Le thermostat ferme le circuit R W1 et envoie un signal 24 VAC au premier relais 22 VDC en passant par un redresseur de courant Sans...

Page 8: ...tre actionn s durant un fonctionnement normal de l appareil Ceux ci sont con us pour tre activ exceptionnellement lors d un mauvais fonctionnement du ventilateur ou lorsque le filtre air a t mal entre...

Page 9: ...MISE EN MARCHE Voltage Courant total consomm par les l ments Temp rature de l air chaud d alimentation Temp rature de l air de retour Pression statique dans le conduit d alimentation en air Pression s...

Page 10: ...r 2 55 80 97 107 122 111 126 147 Disjoncteur maximum du circuit Amp 2 60 80 100 110 125 125 150 150 DONN ES TECHNIQUES DU VENTILATEUR ajust en usine pour une pression statique de 0 5 W C Vit du ventil...

Page 11: ...PCM arrondis 5 PCM le plus pr s Donn es prisent avec le filtre air install TABLEAU 3 D bit d air PCM SUPR ME avec un moteur de 1 HP 0 1 0 2 0 3 0 4 0 5 0 6 0 7 LOW 1035 1030 1030 1025 1020 1020 1015...

Page 12: ...12 FIGURE 6 Diagramme lectrique...

Page 13: ...13 COMPOSANTES ET PI CES DE REMPLACEMENT...

Page 14: ...14 LISTE DE PI CES Vue explos e Supr me avec moteur 1 3 HP ou 1 0 HP FEMxx M2301CM B ou FEMxx M2301DM B B50089C dwg...

Page 15: ...4 L05F004 BORNIER A VIS 4 POSITIONS 15 L01H009 RELAIS SPDT 24 VAC 16 L01F010 TRANSFORMATEUR 208 240 24Volts 17 L99F004 BLOC TERMINAL 18 L01H030 RELAIS DPST 22 VDC 19 R99G006 REDRESSEUR DE PUISSANCE 20...

Page 16: ...1L 1V8 Caution Do not tamper with the unit or its controls Call a qualified service technician Printed in Canada Printed on 100 recycled paper DNS 0981 Rev A MULTI POSITION INSTALLER SERVICE TECHNICIA...

Page 17: ...P 7 3 2 OPERATING SEQUENCE 7 3 3 USE OF MANUAL FURNACE CONTROLS 7 3 4 AIRFLOW VERIFICATION 8 4 MAINTENANCE 8 4 1 AIR FILTER 8 4 2 MOTOR LUBRICATION 8 5 INFORMATION 9 TABLES AND FIGURES FIGURE 1 CONFIG...

Page 18: ...nqualified persons can result in hazards to them and to others Installations must conform to local codes or in the absence of same to codes of the country having jurisdiction The information contained...

Page 19: ...uding 20 k W can be installed with a zero clearance to combustible material Ducts for furnaces of 23 kW or more must have a clearance of 25 mm 1 to combustible material for the first 0 9 m 36 of duct...

Page 20: ...trol the temperature of the area to be heated Follow the instructions supplied with the thermostat Install the thermostat on an interior wall in a location where it will not be subject to direct sun l...

Page 21: ...airflow refer to the following table as well as the airflow tables based on static pressure in the Technical Specifications section of this manual For the adjustment of the airflow on heating mode to...

Page 22: ...RATING SEQUENCE Heating mode 1 The thermostat closes the R W1 circuit 24 VAC thereby activating the first 22 VDC relay passing by a rectifier control Without delay the first heating element is activat...

Page 23: ...al protectors should never need to engage during the normal functioning of the appliance They are strictly designed to engage during the improper functioning of the blower or when the filter was impro...

Page 24: ...ame and address START UP RESULTS Voltage Total current consumed by the elements Supply air temperature Return air temperature Supply air duct static pressure Return air duct static pressure Total pres...

Page 25: ...17 9 Circuit Amperage wire sizing 2 55 80 97 107 122 111 126 147 Maximum size circuit breaker Amp 2 60 80 100 110 125 125 150 150 BLOWER DATA factory adjusted to a staic pressure of 0 5 W C Blower spe...

Page 26: ...5 CFM more or less These readings were taken with the air filter installed TABLE 3 Air Flow CFM SUPREME with 1 HP motor 0 1 0 2 0 3 0 4 0 5 0 6 0 7 LOW 1035 1030 1030 1025 1020 1020 1015 MED LOW 1315...

Page 27: ...12 FIGURE 6 Wiring Diagram...

Page 28: ...13 COMPONENTS AND REPLACEMENT PARTS...

Page 29: ...14 PARTS LIST Exploded View SUPREME with 1 3 HP and 1 HP motor FEMxx M2301CM B and FEMxx M2301DM B B50089C dwg...

Page 30: ...PLATE FOR ELECTRICAL SIDE 14 L05F004 TERMINAL STRIP 4 POSITION 15 L01H009 RELAY SPDT 24 VAC 16 L01F010 TRANSFORMER 208 240 24 Volts 17 L99F004 TERMINAL BLOCK 18 L01H030 SEQUENCER Please refer to Table...

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