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 10

 

 

 

CAUTION

 

Low flue gas temperature increases the risk of 
condensation. Adjust the total flue gas temperature 
at or higher then 204°C (400°F) in order for the heat 
exchanger warranty to remain in force.

3.3.5  Overfire pressure test 

The overfire draft that is taken through the observation port, 
located above the burner, is a measurement necessary to 
determine if there is a blockage in the heat exchanger or the 
flue pipe. Refer to the Technical Specifications in this manual 
for overfire pressure values. A high pressure condition may be 
caused by excessive combustion air, due to the air band being 
too wide open, or a lack of flue draft (chimney effect) or some 
other blockage, such as soot in the secondary section of the 
heat exchanger or the use of an oversize nozzle input or high 
pressure pump. 

3.3.6  Vent Temperature Test 

1. 

After having adjusted the burner combustion, insert a 
thermometer into the test hole in the breech pipe; 

2. 

The total vent temperature should be between 204 and 
302°C (400 and 575°F). If not, check for improper air 
temperature rise, pump pressure, nozzle size or a badly 
soothed heat exchanger. Also refer to section 2.5 for 
proper flue pipe sizing. 

 

3.3.7  Supply air Temperature Rise Test 

1.  Operate the burner 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; 

5.  If the temperature rise is lower or exceeds the 

temperature specified in Table 7, p. 13, change to the next 
lower or higher blower speed tap, until the temperature 
rise falls to the target. If the excessive temperature rise 
cannot be increased or reduced by changing fan speed, 
investigate for ductwork obstructions, dirty or improper air 
filter, improper firing caused by improper pump pressure 
or nozzle sizing. 

3.3.8  Limit Control Check 

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 burner will 
shut off but the blower will continue to run. 

Remove the obstruction and the burner should restart after a 
few minutes. The time required for the restart also depends on 
the adjustment of the blower “OFF” delay. 

3.3.9  Restart after burner failure 

1.  Set the thermostat lower than room temperature; 
2.  Press the reset button on the burner primary control 

(relay) 

3.  Set the thermostat higher than room temperature; 
4.  If the burner motor does not start or ignition fails, turn off 

the disconnect switch and CALL A QUALIFIED SERVICE 
TECHNICIAN. 

CAUTION

 

Do not attempt to start the burner when excess oil has 
accumulated, when the furnace is full of vapour or when 
the combustion chamber is hot. 

 

4 MAINTENANCE 

WARNING 

Electrical shock hazard. 

Turn OFF power and fuel 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 and burner inspected by a qualified 
service technician at regular intervals.  

To maintain the reliability and optimal performance of the 
furnace, have a complete combustion check done after 
the annual maintenance call. 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 the oil tank gauge and make sure that the 

valve is open; 

2.  Check fuses and the circuit breaker; 
3.  Check if the main disconnect switch is ON ; 
4.  Set the thermostat above room temperature; 
5.  If ignition does not occur, turn off the disconnect 

switch and call a qualified service technician. 

When ordering replacement parts, please specify the 
complete furnace model and serial number. 

4.1 

CLEANING THE HEAT EXCHANGER 

It is not generally necessary to clean the heat exchanger 
or flue pipe every year, but it is advisable to have the oil 
burner service technician check the unit before each 
heating season to determine whether the cleaning or 
replacement of parts is necessary. 

If a cleaning is necessary, the following steps should be 
performed: 

1.  Turn OFF all utilities upstream from the furnace; 
2.  Disconnect the flue pipe; 
3.  Remove the flue collar panel located at the rear of the 

furnace; 

4.  Remove the clean-out door located at the front of the 

furnace; 

5.  Remove the heat exchanger baffles; 
6.  Disconnect the oil line and remove the oil burner; 
7.  Clean the secondary tubes and the primary cylinder 

with a stiff brush and a vacuum cleaner; 

8.  Before re-assembling the unit, the heat exchanger 

and combustion chamber should be inspected to 
determine if replacement is required; 

Содержание AMT154SDMA

Страница 1: ...ke Qu bec www dettson ca Attention Do not tamper with the unit or its controls Call a qualified service technician INSTALLER SERVICE TECHNICIAN USE THE INFORMATION IN THIS MANUAL FOR THE INSTALLATION...

Страница 2: ...ply air Temperature Rise Test 10 3 3 8 Limit Control Check 10 3 3 9 Restart after burner failure 10 4 MAINTENANCE 10 4 1 CLEANING THE HEAT EXCHANGER 10 4 2 CLEANING THE BLOCKED VENT SHUT OFF DEVICE BV...

Страница 3: ...formation such as the model and serial numbers of the furnace WARNING Installations and repairs performed by unqualified persons can result in hazards to them and to others Installations must conform...

Страница 4: ...re the ambient and return air temperatures are above 15 C 60 F In addition the furnace should be installed as closely as possible to the vent so that the connections are direct and kept to a minimum T...

Страница 5: ...ired for Riello burners Refer to the burner control instruction manual and markings for proper adjustment of the post purge delay 2 5 VENTING WARNING Poisonous carbon monoxide gas hazard Never install...

Страница 6: ...equate supply of combustion air It is common practice to assume that older homes have sufficient infiltration to accommodate the combustion air requirement for the furnace However home improvements su...

Страница 7: ...ated the return air must be sealed and also be directed to the space other than where the furnace is located 2 9 1 Air filter A properly sized air filter must be installed on the return air side of th...

Страница 8: ...heating or air conditioning mode This signal can be used to activate an electronic air cleaner that is not equipped with an air flow switch If the cleaner is equipped with an air flow switch the S te...

Страница 9: ...of the oil piping and pump Slowly close and tighten the bleed screw Once closed the flame will light up 3 3 2 Pressure adjustment The oil pressure must be adjusted according to the Technical Specifica...

Страница 10: ...burner should restart after a few minutes The time required for the restart also depends on the adjustment of the blower OFF delay 3 3 9 Restart after burner failure 1 Set the thermostat lower than r...

Страница 11: ...uction inside the heat transfer tube 7 Re mount lock and fasten the control box with the 2 screws removed in step 4 8 Re attach the assembly cover with the screws removed in step 2 9 Re establish powe...

Страница 12: ...vice telephone Day Night Dealer name and address START UP RESULTS Nozzle Pressure lb po 2 Burner adjustments Primary air Fine air Drawer Assembly CO2 Smoke scale Bacharach Gross stack temperature F Am...

Страница 13: ...n 87 5 86 2 87 5 86 2 Volts Hertz Phase Rated current Amps Minimum ampacity for wire sizing Amps Max fuse size Amps Control transformer VA External control power available Heating VA Cooling VA Heatin...

Страница 14: ...Time ShortRun On Delay CFM Level Time Off Delay CFM Level Time A 1 OFF 2 OFF 0 90 13 45 sec 44 30 sec 38 3 min B 1 ON 2 OFF 1 10 13 30 sec 44 30 sec 38 3 min C 1 OFF 2 ON 1 10 13 30 sec 50 30 sec 38...

Страница 15: ...WITH AIR FILTER Table 10 Minimum clearances from combustible material LOCATION APPLICATION CLEARANCES combustible materials RECOMMANDED ACCESS FOR SERVICE FURNACE 2 54 cm 1 0 6 m 24 SUPPLY PLENUM WIT...

Страница 16: ...16 Figure 7 Furnace Dimensions...

Страница 17: ...17 Figure 8 Wiring Diagram 4 Speed Motor PSC...

Страница 18: ...18 Figure 9 Wiring Diagram Variable Speed Motor ECM...

Страница 19: ...19 Figure 10 Parts List With 4 Speed motor PSC B50095B...

Страница 20: ...TERIOR 33 F06F015 ZINC WASHER 1 7 16 34 Z99F061 SIGHT GLASS FOR HEAT EXCHANGER 35 Z06G001 BLOCKED VENT SHUT OFF BVSO 225 36 B03675 GASKET SMOKE OUTLET 37 B03765 CLEAN OUT ASSEMBLY Item 36 included 38...

Страница 21: ...21 Figure 11 Parts List With variable speed motor ECM B50096C...

Страница 22: ...ELECTRICAL BOX COVER Panel only 32 B03118 01 ELECTRICAL KIT BVSO EXTERIOR 33 F06F015 ZINC WASHER 1 7 16 34 Z99F061 SIGHT GLASS FOR HEAT EXCHANGER 35 Z06G001 BLOCKED VENT SHUT OFF BVSO 225 36 B03675 G...

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