Suburban DD-17DSI Page 40 Service Manual Download | Manualshive

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40

Figure 28

Fan Control Board

(NT-24/30/34SP and NT-40)

Figure 29

Fan Control

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Summary of Contents for DD-17DSI

Page 1: ...SF 30 SF 35 SF 42 SF 20F SF 25F SF 30F SF 35F SF 42F SH 35 SH 42 SH 35F SH 42F SHD 2542 SFV 35 SFV 42 SFV 35F SFV 42F SUBURBAN MANUFACTURING COMPANY Broadway Street 676 Dayton Tennessee 37321 423 775...

Page 2: ...on Furnaces 29 30 Wiring Diagrams 30 34 Furnace Removal 35 36 SF SH and SHD 2542 Electrode Gap Specifications Positioning 37 NT and Park Model Electrode Gap Specifications Positioning 38 Maintenance 3...

Page 3: ...s Supply Pressure Requirements Line Pressure Minimum 11 WC Maximum 14 WC WC water column Voltage Requirements Voltage DC 12 volt D C Minimum 10 5 volts D C Maximum 13 5 volts D C Service Tools Require...

Page 4: ...SF 30 30 000 7 1 2 17 20 Electronic 35 SF 35 35 000 7 1 2 17 20 Electronic 35 SF 42 40 000 7 1 2 17 20 Electronic 35 SH 35 35 000 9 1 4 17 20 Electronic 40 SH 42 40 000 9 1 4 17 20 Electronic 42 SHD 2...

Page 5: ...ll Suburban forced draft furnaces regardless of the model or the method in which they are installed They are 1 Selecting a Location 2 Venting 3 Return Air 4 Ducting Refer to the furnace installation m...

Page 6: ...between the exhaust and intake caulking Refer to the vent assembly installation in the manual The vent must be straight There can be no offsets or turns in the vent All vent tubes which connect to th...

Page 7: ...7 SH VENT ASSEMBLY INSTALLATION SF and SH SERIES Figure 2 SF Figure 2A...

Page 8: ...8 SH and SHD 2542 VENT ASSEMBLY INSTALLATION SF and SH SERIES Figure 3 SF Figure 3A...

Page 9: ...9 SH VENT ASSEMBLY INSTALLATION SFV Figure 4 SF Figure 4A...

Page 10: ...10 Figure 5A Figure 5...

Page 11: ...11 Figure 6...

Page 12: ...12 Figure 6A VENT ASSEMBLY INSTALLATION DD SERIES Note Vent cap must be installed on DD furnace when bench testing Figure 7...

Page 13: ...VENT ASSEMBLY INSTALLATION NT SERIES 13 NT 12 16 20S and SE NT 12 16S Figure 8 NT 12 16 20SE Figure 9 Figure 10...

Page 14: ...VENT ASSEMBLY INSTALLATION NT SERIES 14 NT 20S Figure 11 Figure 12...

Page 15: ...MAX LENGTH Extension Tube Range 520498 2 1 4 to 3 1 8 520499 3 1 8 to 4 7 8 520500 4 7 8 to 7 520501 7 to 9 Figure 14 NT 24 30 34SP P 30S EXTENSION TUBE KIT NUMBER MIN MAX LENGTH Extension Tube Range...

Page 16: ...16 VENT ASSEMBLY INSTALLATION NT 40 and P 40 P 40 Figure 16 NT 40 Figure 17...

Page 17: ...ea of the sofa or bed Return air from the living area of the trailer is drawn in through the grille and into the return air openings in the furnace cabinet Figure 19 illustrates the return air circula...

Page 18: ...o means for return air recirculation should not be counted in the required duct area Also ducts 2 in diameter or smaller should not be counted in the required duct area When installing a duct system a...

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Page 28: ...265 NT 30SP Ducted 30 000 PROPANE 12 VDC 2 5 5 5 2 wc 345 NT 34SP Ducted 34 000 PROPANE 12 VDC 2 5 7 5 1 wc 373 NT 40 Ducted 40 000 PROPANE 12 VDC 2 5 9 5 155 20B 441 Park Models P 30S Ducted 30 000 P...

Page 29: ...20 000 PROPANE 12 VDC 3 8 5 2 wc 300 SFV 25 25F Ducted 25 000 PROPANE 12 VDC 3 8 5 2 wc 300 SFV 30 30F Ducted 30 000 PROPANE 12 VDC 3 8 5 2 wc 300 SFV 35 35F Ducted 35 000 PROPANE 12 VDC 3 9 4 2 wc 37...

Page 30: ...comes up to speed air flow closes the sail switch completing the circuit The sail switch is placed into the system as a safety to prove there is adequate air for combustion The next operation is cont...

Page 31: ...nse sail switch and limit switch circuits and the thermostat inputs during the heating period The flame is sensed through the spark wire and electrode Therefore it is essential that the electrode is p...

Page 32: ...cycle the limit switch circuit opens and remains open the gas valve will close and the blower motor will continue to run 90 Second Shut Down When the thermostat has reached its set point and the deman...

Page 33: ...will remain in the second stage operation until thermostat is satisfied 90 Second Shut Down When the thermostat has reached its set point and the demand for heat ends the gas valve will be de energize...

Page 34: ...loses No contact points and the heat Yes connections replace thermostat if anticipator anticipator is shorted No Check 12vdc at blue wire check the Yes Replace thermostat amp draw to thermostat Yes No...

Page 35: ...re at the manifold or for Did the gas valve open restrictions in the burner orifice Yes No Yes Check for restriction in Replace the gas valve combustion air Intake wasps etc No No Check flame contact...

Page 36: ...in the gas supply line If no gas is coming through the burner check for obstruction in gas line in main burner orifice or in main burner b Gas is coming through burner but spark will still not ignite...

Page 37: ...he problem especially where the horizontal type gas bottle is being used the following steps should be take to prepare the gas system against further moisture problems Corrective Measures 1 Disconnect...

Page 38: ...38 Figure 24 Figure 25 Figure 23 Remote Flame Sense With Time Delay Fan Control Board SF 20 25 30 35 42F Local Flame Sense NT Models With Time Delay...

Page 39: ...39 Figure 26 Local Flame Sense SF Models With Time Delay Figure 27 Fan Control Board NT 12 16 20S and SE...

Page 40: ...40 Figure 28 Fan Control Board NT 24 30 34SP and NT 40 Figure 29 Fan Control...

Page 41: ...41 P 30S Figure 30 Fan Control Board P 40...

Page 42: ...cap assembly by removing applicable screws 3 Remove the cabinet front two 2 screws 4 Remove the 2 two tie down screws securing the chamber to the cabinet 5 Remove the furnace from the cabinet by pulli...

Page 43: ...rode should be positioned as outlined in the drawing 1 Remove the furnace chamber assembly from the furnace cabinet following instructions listed in the installation manual 2 Remove the burner access...

Page 44: ...positioned as outlined in the drawing 1 1 8 spark gap between electrode and ground 2 Maintain electrode position of 3 16 over burner ports Figure 32 LOCAL FLAME SENSE PARK MODEL ELECTRODE GAP SPECIFIC...

Page 45: ...ues under these conditions it could result in serious injury to the occupants of the RV or even death Cleaning of the main burner and an inspection of the venting system should be done at least once a...

Page 46: ...46 Figure 36 Figure 37...

Page 47: ...trode assembly on remote sense units 5 Install the furnace so electrical components and connections are protected from water 6 Wire the furnace direct to the battery when possible 7 Use two wrenches o...

Page 48: ...SUBURBAN MANUFACTURING COMPANY 676 Broadway Street Dayton Tennessee 37321 423 775 2131 Fax 423 775 7015 www rvcomfort com E mail info1 suburbanmfg com 2007...

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