Dettson C45-1-D Installation Manual And User's Manual
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Dettson C45-1-D Installation Manual And User's Manual

Condensing gas furnace
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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 / servicing of the furnace and
keep the document near the unit for future reference.
These instructions must be read and understood completely before attempting installation.
HOMEOWNER: PLEASE Keep this manual nears the furnace for future reference.
Manufactured by:
Industries Dettson Inc.
Sherbrooke (Québec) Canada
www.dettson.com
2015-07-09
X40223 rev. I

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  • Page 1 These instructions must be read and understood completely before attempting installation. HOMEOWNER: PLEASE Keep this manual nears the furnace for future reference. Manufactured by: Industries Dettson Inc. Sherbrooke (Québec) Canada www.dettson.com 2015-07-09...

  • Page 2: Table Of Contents

    TABLE OF CONTENT 7.7.2- Two pipes termination ......... 27 1- Safety regulation ..........5 7.7.3- Sidewall termination ........27 1.1- Safety labeling and warning signs ....5 8- Start up, adjustment and safety check ..27 1.2- Important information ........5 8.1- To start the furnace ........
  • Page 3 INDEX OF FIGURES Figure 1 Freeze protection and return air temp....8 Figure 16 Return air base ..........15 Figure 2 Installation in a garage ........9 Figure 17 Typical gas pipe arrangement ......17 Figure 3 Prohibited installation ......... 9 Figure 18 Power cord installation in the furnace ....
  • Page 4 REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS IMPORTANT The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA-54, Chapter 10. Revise 10.8.3 by adding the following additional requirements: For all side wall horizontally vented gas fuelled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied: Installation of Carbon Monoxide Detectors...

  • Page 5: 1- Safety Regulation

    1- SAFETY REGULATION WARNING 1.1- SAFETY LABELING AND WARNING SIGNS CARBON MONOXIDE POISONING/COMPONENT DAMAGE HAZARD The words DANGER, WARNING AND CAUTION are used to identify the levels of seriousness of certain hazards. It is important that you understand Failure to follow this warning could result in personal injury or death and their meaning.
  • Page 6 Clean outside air is provided for combustion. This is to minimize the CAUTION corrosive effects of adhesives, sealers and other construction materials. It also prevents the entrainment of drywall dust into combustion air, which can cause fouling and plugging of furnace components. Sheet metal parts may have sharp edges or burrs.

  • Page 7: 2- Introduction

    CAUTION WARNING FURNACE CORROSION HAZARD CARBON MONOXIDE POISONING HAZARD Failure to follow this caution may result in furnace damage. Air for For all venting configurations for this appliance and other gas combustion must not be contaminated by halogen compounds, which appliances placed into operation for the structure, provisions for include fluoride, chloride, bromide, and iodine.

  • Page 8: Codes And Standards

     2.1- CODES AND STANDARDS This product must be installed by a licensed plumber or gas fitter.  When flexible connectors are used, the maximum length shall not exceed 36”. (914 mm). Figure 1 Freeze protection and return air temp. ...

  • Page 9: 1- Location Relative To Cooling Equipment

     furnace should be located as close to the chimney (vertical venting) or to Be provided ample space for servicing and cleaning. Always the outside vent wall (horizontal venting) as possible. comply with minimum fire protection clearances shown in Table 1 Minimum clearance combustible...

  • Page 10: 2- Non Direct Vent (1 Pipe) Applications

    2.4.2- Non direct vent (1 pipe) applications All air for combustion is piped directly to the furnace from a space that is well ventilated with outdoor air (such as an attic, crawlspace or equipment When the furnace is installed as a non-direct vent (1 pipe) furnace, it will closet) and the space is well isolated from the living space or garage.

  • Page 11: 1- Combustion Air Piping

    Figure 5 Vent coupling and adapter with gaskets 2.5.1- Combustion air piping Use a 90° elbow or two medium-radius sweep elbows to keep the inlet downward and prevent the entry of rain. The inlet opening of the combustion air termination must be a minimum of 12” above the anticipated level of snow accumulation.

  • Page 12: Upflow Orientation

    Figure 7 Drain Trap Figure 9 Right side condensate drain connection 3.1- UPFLOW ORIENTATION In the Upflow orientation, the condensate trap can be to the right or to the left of the furnace. The condensate drain must be routed from the trap through the furnace casing.

  • Page 13: 1- Right Side Condensate Drain Connection

    3.1.1- Right side condensate drain connection that is a code approved drain, or to a condensate pump approved for use with acidic furnace condensate. Remove the oblong knock-out from the right side of the casing. Place the drain trap gasket on drain trap, in a way that the holes are aligned.

  • Page 14: 2- Horizontal Right Vent Drainage

    Screw in place the drain trap with 2 head tapping screws on the 3.3.3- Condensate box pressure switch side of the furnace. The 3/16 stub just beside the drain of the condensate box must be drilled Install two 1/2” black plastic cap on the stubs of the drain trap or cut open.

  • Page 15: 2- Condensate Box Pressure Switch

    Figure 16 Return air base Figure 15 Horizontal left condensate drain connection 4.1.1- Bottom return air inlet In Upflow orientation, for the bottom inlet, it is possible to use a return air base. This base allows the connection of the duct on the side with a bottom inlet.

  • Page 16: 1- Duct Work Acoustical Treatment

    consult The Air Systems Design Guidelines reference tables available Maintain a 1 in. (25 mm) clearance from combustible materials to from your local distributor. supply air ductwork for a distance of 36 in. (914 mm) horizontally from the furnace. See NFPA 90B or local code for further The duct system should be sized to handle the required system design requirements.

  • Page 17: 5- Gas Piping

    Table 5 : Air flow capacity and blower date 1 stage direct drive INPUT HIGH 45,000 60,000 75,000 105,000 120,000 OUTPUT HIGH 42,750 57,000 71,475 100,065 115,440 EFFICIENCY 95.3 95.3 96.2 TEMP. RISE 40-70 °F HIGH Please see tables in Annex I COOLING DIRECT DRIVE MOTOR TYPE...

  • Page 18: Gas Pipe Grommet

    The gas supply pressure shall be within the maximum and minimum inlet Furnace must have a 120 V power supply properly connected and supply pressures marked on the rating plate with the furnace burners and grounded. in Table 7 Gas pressure. NOTE: Proper polarity must be maintained for 120 V wiring.

  • Page 19: 24 V Wiring

    blower speeds. See airflow tables in annexe for the relation between CFM and external static pressure applicable to your model. The cooling and Figure 18 Power cord installation in the furnace heating blower speed are shipped with the suggested fan speed describe in table 9 and table 10.

  • Page 20: Figure 19 Wiring Diagram - One Stage Psc

    Figure 19 Wiring diagram – One stage PSC...

  • Page 21: Figure 20 : Two Stage Psc - Furnace Control

    Figure 20 : Two Stage PSC - Furnace Control...

  • Page 22: Figure 21 : Two Stage Ecm - Furnace Control

    Figure 21 : Two Stage ECM - Furnace Control...

  • Page 23: 7- Venting

    systems must be composed of pipe, fittings, cements, and primers listed to ULC S636. 7- VENTING 7.4- DIRECT VENT - 2 PIPES SYSTEM 7.1- SPECIAL VENTING REQUIREMENTS FOR INSTALLATIONS IN CANADA In a direct vent (2 pipes) system, all air for combustion is taken directly from The special vent fittings and accessory concentric vent termination kits outdoor atmosphere, and all flue products are discharged to outdoor and accessory external drain trap have been certified to ULC S636 for use...
  • Page 24 If the Maximum Vent Length calculated is longer than the NOTE: If the Maximum Vent Length for diameter of the pipe selected is individual measured length of the vent pipe and combustion air longer than the measured length and the equivalent length of all pipe, then the diameter of pipe selected may be used.

  • Page 25: Figure 23 Multi Venting

    Figure 23 Multi venting Table 11 : Maximum equivalent straight vent length (two stage and modulating) Vent pipe diameter (in.) Altitude (ft) Unit size (Btu/hr)* 2" 3" and 4" 15,000 30,000 45,000 0 to 4500 ft 60,000 75,000 105,000 120,000 Table 12 Maximum equivalent straight vent length (single stage) Vent pipe diameter (in.) Altitude...

  • Page 26: Combustion Air And Vent Piping Insulation Guidelines

    Table 13 Deduction for fitting Type of elbow Equivalent Length (ft.) 45° Standard 45° Long sweap 2½ 90° Standard 90° Long sweap Table 14 Approved combustion air and vent pipe, fitting and cement materials (U.S.A. Installation) ASTM SPECIFICATION SOLVENT CEMENT MATERIAL PIPE FITTINGS...

  • Page 27: Installing The Vent Termination

    Clean and dry all surfaces to be joined. terminations should be spaced no more than 18” (457 mm) apart. Termination elbows will be installed after the vent and combustion air pipe Check dry fit of pipe and mark insertion depth on pipe. is installed.

  • Page 28: Unit Operation Hazard

    Remove the burner compartment control access door. 90 sec. 120 sec. IMPORTANT: Be sure that the manual gas control has been in 180 sec.* the “OFF” position for at least five minutes. Do not attempt to * Factory setting manually light the main burners. Set the room thermostat to its lowest setting and turn off the 8.4.1- Heat mode furnace electrical power.

  • Page 29: 3- Manual Fan On Mode

    delay-to-fan off period ends, the circulator fan and electronic air cleaner 6 flashes, then pause 115 Volt AC power reversed/Improper (optional) are de-energized. ground 7 flashes, then pause Low flame sense signal Continuous flashing Flame has been sensed when no 8.4.3- Manual fan on mode no pause) flame should be present (no call for...

  • Page 30: 2- Cool Mode

    On the 50M51 control, the circulator will remain at high heat speed for 30 energized, interrupting the call for heat at the thermostat will not seconds following the opening of the second stage gas valve and then is reset the control). reduced to low heat speed.
  • Page 31 Green Amber Error/Condition Comments/Troubleshooting Flash Flash Flash Flame sensed when no flame Verify the gas valve is operating and shutting down properly. should be present Flame in burner assemble should extinguish promptly at the end of the cycle. Check orifices and gas pressure. Pressure switch stuck closed/ Pressure switch stuck closed.

  • Page 32: Option Switch Settings - 2 Stage Ecm

    8.6.5- De-humidification connection 8.6- OPTION SWITCH SETTINGS – 2 STAGE ECM DIP switch S5-2 (see table above) is set to “On” from the factory for systems that do not have a dehumidification terminal connection from the thermostat. For systems using a thermostat that provides a De- 8.6.1- Thermostat type and heat-fan-off delay Humidification option move DIP switch S5-2 to “Off”.

  • Page 33: Troubleshooting

    8.7- TROUBLESHOOTING 8.7.1- System lockout When a system lockout occurs (1 hour), the gas valve is de-energized, the low speed inducer blower is energized for the 60 seconds inter-purge period and the circulator is energized for selected heat off delay if it was previously ON.
  • Page 34 Green Amber Error/Condition Comments/Troubleshooting Flash Flash Flash Flame sensed when no flame Verify the gas valve is operating and shutting down properly. should be present Flame in burner assemble should extinguish promptly at the end of the cycle. Check orifices and gas pressure. Pressure switch stuck closed/ Pressure switch stuck closed.

  • Page 35: Prime Condensate Trap With Water

    9- OPERATING YOUR FURNACE 8.8- PRIME CONDENSATE TRAP WITH WATER These furnaces are equipped with an ignition device which automatically UNIT OPERATION HAZARD lights the burners. Do not try to light the burners by hand. Failure to follow this caution may result in intermittent unit operation or performance satisfaction.

  • Page 36: Maintenance Of Your Furnace

    is present. If your observations indicate improper flame adjustment, call MAINTENANCE OF YOUR FURNACE your authorized service dealer for service. Do not attempt to adjust flame! There are routine maintenance steps you should take to keep your Your service representative will perform this adjustment correctly. furnace operating efficiently.

  • Page 37: Figure 26 Exploded View 1 Stage Psc

    Figure 26 Exploded view 1 stage PSC...

  • Page 39: Table 23 Part List - 1 Stage Psc

    B40512-02 B40512-02 B40512-03 B40512-03 Blower rail B40552 B40552 B40552 B40552 B40552 Door switch L07H001 L07H001 L07H001 L07H001 L07H001 Observation port w Dettson logo B40565 B40565 B40565 B40565 B40565 Observation port L04Z022 L04Z022 L04Z022 L04Z022 L04Z022 Grommet G14F017 G14F017 G14F017 G14F017...

  • Page 40: Figure 27 Exploded View 2 Stage Psc

    Figure 27 Exploded view 2 stage PSC...

  • Page 42: Table 24: Part List - 2 Stage, Psc

    B40512-02 B40512-02 B40512-03 B40512-03 Blower rail B40552 B40552 B40552 B40552 B40552 Door switch L07H001 L07H001 L07H001 L07H001 L07H001 Observation port w Dettson logo B40565 B40565 B40565 B40565 B40565 Observation port L04Z022 L04Z022 L04Z022 L04Z022 L04Z022 Grommet G14F017 G14F017 G14F017 G14F017...

  • Page 43: Figure 28 Exploded View 2 Stage Ecm

    Figure 28 Exploded view 2 stage ECM...
  • Page 45 B40512-02 B40512-02 B40512-03 B40512-03 Blower rail B40552 B40552 B40552 B40552 B40552 Door switch L07H001 L07H001 L07H001 L07H001 L07H001 Observation port w Dettson logo B40565 B40565 B40565 B40565 B40565 Observation port L04Z022 L04Z022 L04Z022 L04Z022 L04Z022 Grommet G14F017 G14F017 G14F017 G14F017...

  • Page 46: Table 1 Minimum Clearance To Combustible Material For All Table 26 Cfm For 45,000 Btu Psc Motor

    ANNEX I : CFM TABLES Table 26 CFM for 45,000 BTU PSC motor Static pressure Motor speed HIGH 1095 1045 1020 MED-HI 1045 Table 27 CFM in heating for 45,000 BTU 2 stage ECM motor 1st stage -Heating Static pressure Motor speed 2nd stage - Heating Static pressure...

  • Page 47: Table 4 : Air Flow Capacity And Blower Data 2 Stage Direct Table 29 Cfm For 60,000 Btu Psc Motor

    Table 29 CFM for 60,000 BTU PSC motor Static pressure Motor speed 1370 1305 1230 1155 1085 1005 HIGH 1195 1134 1085 1025 MED-HI 1150 1100 1050 1000 1005 Table 30 CFM in heating for 60,000 BTU 2 stage ECM motor 1st stage -Heating Static pressure Motor speed...

  • Page 48: Table 32 Cfm For 75,000 Btu Psc Motor

    Table 32 CFM for 75,000 BTU PSC motor Static pressure Motor speed 1615 1540 1440 1355 1280 1204 1182 1060 HIGH 1670 1590 1480 1382 1300 1219 1192 1065 MED-HI 1496 1388 1289 1188 1133 1087 1083 1015 1272 1197 1148 1108 1042...

  • Page 49: Table 35 Cfm For 105,000 Btu Psc Motor

    Table 35 CFM for 105,000 BTU PSC motor Static pressure Motor speed 1740 1615 1515 1430 1355 1285 1195 1110 1030 HIGH 1655 1550 1435 1360 1285 1230 1150 1080 MED-HI 1405 1325 1240 1180 1135 1070 1005 1130 1065 1025 Table 36 CFM in heating for 105,000 BTU 2 stage ECM motor 1st stage -Heating...

  • Page 50: Table 38 Cfm For 120,000 Btu Psc Motor

    Table 38 CFM for 120,000 BTU PSC motor Static pressure Motor speed 1490 1410 1330 1255 1180 1100 1020 HIGH 1465 1380 1315 1250 1180 1100 1010 MED-HI 1325 1255 1185 1120 1050 1180 1135 1080 1025 Table 39 CFM in heating for 120,000 BTU 2 stage ECM motor 1st stage -Heating Static pressure Motor speed...

  • Page 51: Table 41 2 Stage Variable Speed Gas Furnace (Ecm)

    ANNEX II : SPECIFICATION SHEET Table 41 2 stage variable speed gas furnace (ECM) HIGH 45 000 60 000 75 000 105 000 120 000 INPUT 31 500 42 000 52 500 73 500 84 000 HIGH 42 750 57 000 71 475 99 750 115 080...

This manual is also suitable for:

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