INSTALLATION MANUAL - Vintage Trailer Supply
Contents
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7. L FURNACE MOUNTING SURFACE 2 1 4 DIA 2 HOLES THRU TRAILOR SKIN BACK VIEW OF FURNACE Figure 4 IMPORTANT VENT CAP AND TUBE ASSY MUST BE INSTALLED FROM OUTSIDE OF COACH TRAILER SKIN OUTLINE OF FURNACE HOLE DIA IN OUTER SKIN MAY BE 2 1 4 IF OPENING CUT IN COMBUSTIBLE WALL IS CUT AS ILLUSTRATED IN FIGURES 3 OR 4 HOLE DIA MUST BE 2 3 4 IF THE 4 X 7 1 2 OPENING AS SHOWN IN FIGURE 4 IS NOT CUT THROUGH COMBUSTIBLE WALL CAULK BEHIND VENT CAP AS SHOWN TO SEAL BETWEEN EXHAUST AND INTAKE AND TO PREVENT MOISTURE INSIDE FURNACE COMPARTMENT APPLY CAULKING GENEROUSLY AROUND I PERIMETER OF VENT CAP AND ACROSS CENTER AS SHOWN CENTER PUTTY STRIP IS ESSENTIAL VENT CAP amp EXHAUST TUBE ASSEMBLY INTAKE TUBE INSTALLING VENT CAP Figure 6 LEFT SIDE KNOCKOUT FOR CONNECTOR Figure VALVE SWITCH y GROUNDING TERMINAL SAIL LIMIT SWITCH SW N C BOARD N O ELECTRODE THERMOSTAT N O SWITCH 6 BL THERMOSTAT R 12 V D C Y 12 V D C BL THERMOSTAT VALVE 12 VOLTS D C ALL WIRES ARE 18 AWG UNLESS OTHERWISE SPECIFIED CAUTION DO NOT HI POT DIELECTRIC ORANGE HIGH VOLTAGE TEST THIS UNIT AFTER NOTE IF ANY OF THE ORIGINAL WIRES AS SUPPLIED INSTALLATION TO DO SO MAY CAUSE
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22. Side 1 See Figure 8 Reduced Front Clearance Front 12 NT 16SEQ 1 Front 18 NT 20SEQ Side 0 Floor 1 Note Must provide an additional 12 sq in of return air when side clearance is 1 8 See Figure 9 3 When an appliance is installed directly on carpeting tile or other combustible material other than wood flooring the appliance shall be installed on a metal or wood panel extending the full width and depth of the appliance If preferred the carpeting tile or combustible materials other than wood may be cut away the full length and depth of the appliance plus the appliance minimum clearances to combustibles 4 Cut or frame an opening in the coach cabinetry 10 10 as shown Figure 2 or Figure 3 5 Slide the front of the furnace through the opening and extend it beyond the coach cabinetry 1 3 as shown in Figure 2 or Figure 6 Determine X dimension as shown in Figure 1 7 Determine Y dimension as shown in Figure 1 8 If X Y is less than 21 then an opening 9 x 9 3 must be cut through the inner wall only DO NOT CUT THROUGH COACH SKIN See Figure 2 Next locate the center line of the exhaust and intake tube Cut two 2 diameter holes through the outer skin as shown in Figure 4 NOTE Whenever the furnace cabinet is installed through the outside wall the return air louvers on the furnace cabinet must not be blocked The maximum
23. THERMOSTAT The thermostat used with this unit must have NO voltage output to return leg when there is not a call for heat or in the OFF setting Locate the room thermostat approximately 4 feet above the floor on an inside bulkhead where it is not affected by heat from any source except room air Connect the thermostat wires to the blue wires on the right side of the furnace See wiring diagram If your furnace is equipped with a thermostat that has an adjustable anticipator the anticipator should be set at 7 amps If you desire longer heating cycles adjust the anticipator to a higher setting If you desire shorter heating cycles adjust the anticipator to a lower setting Adjustments to the anticipator setting should be made in 5 amp increments INSTALLING VENT ASSEMBLY The vent outlet must be installed so it is in the same atmospheric pressure zone as the combustion air intake The exhaust and intake tubes must be installed from the outside pass through the RV skin and slide onto the furnace exhaust and intake WARNING Do not alter the vent assembly supplied with this furnace Any modifications will result in improper installation which could cause unsafe furnace operation Never operate furnace with vent covered CAUTION Combustion air must not be drawn from the living area All air for combustion must be drawn from the outside atmosphere All exhaust gases must be vented to the outside atmosphere never inside th
24. WITH THE APPLIANCE MUST BE REPLACED IT MUST BE COMPONENT DAMAGE AND VOIDS BR BROWN REPLACED WITH WIRING MATERIAL HAVING A WARRANTY OF FURNACE TEMPERATURE RATING OF AT LEAST 105 C NO 18 250 C RADIX WIRE UL 3257 UNIT 100 FIRE CHECKED 340513 Figure 7 ILLUSTRATION OF MINIMUM SIDE CLEARANCES WITH A MINIMUM OF 24 CLEARANCE FRONT GRILL TO NEAREST OBSTRUCTION OBSTRUCTION FRONT GRILL Figure 8 ILLUSTRATION OF MINIMUM CLEARANCES REQUIRING ADDITIONAL RETURN AIR TO FURNACE FURNACE CABINET WALL YX 177 IV ZZ ZX Z Z 17 M LEFT OR RIGHT SIDE IS LESS THAN 8 12 NT 16SEQ 18 NT 20SEQ 12 SQUARE INCHES ADDITIONA RETURN AIR IS REQUIRED IF LESS THAN 8 TO SIDE WALL WITH 12 FRONT WALL CLEARANCE MODEL NT 16SEQ OR 18 FRONT WALL CLEARANCE MODEL NT 20SEQ Figure 9 1 3 4 MAX SSS IF THE UNIT GRILLE IS FRAMED FRAME MAY BE AT 0 CLEARANCES TO TOP amp SIDES OF GRILLE AND EXTEND 13 MAX FROM BACK SIDE GRILLE THE1 BOTTOM CLEARANCE MUST BE MAINTAINED FOR RETURN AIR UNDER UNIT Figure 10 AN i Suburban ueqmqns UOISIAIG ueqinqns 4 0 2 7 N snos un n uu d od aed ap od yop
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26. projection of the furnace cabinet into the wall is 2 See Figure 2 NOTE Furnace cabinet approved for 0 clearance to combustible materials rear 2 of furnace cabinet 9 If X Y is 21 or greater two methods may be used to install the furnace a Cut a 4 x 7 opening through combustible wall as shown Figure 3 DO NOT CUT THROUGH TRAILER SKIN Next locate the center line of the exhaust and intake tube Cut two 2 diameter holes through trailer skin See Figure 4 b If you do not wish to cut the 4 x 7 opening locate the center line of the exhaust and intake tube as shown in Figure 4 Next cut two 2 aa diameter holes through trailer skin and also the combustible wall of the trailer as illustrated in Figure 6 Care must be taken when locating the center line of the exhaust and intake tube as well as when cutting the holes in order to assure a 3 8 clearance around the exhaust and intake tube to combustible materials 10 Refer to the chart in Figure 1 and select the range for which the X dimension falls The intake tube length directly to the left of the selected range is the length required NOTE The 7 length exhaust tube assembly will accommodate all approved installation depths only the intake tube must be ordered when needed Under no circumstances should the standard 5 intake tube be cut or altered to adapt to the 21 23 1 range 11 Secure furnace to the
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28. SUBURBAN MANUFACTURING COMPANY 676 Broadway Street Dayton Tennessee 37321 423 775 2131 www RVComfort com z Suburban INSTALLATION MANUAL For Furnace Models NT 16SEQ NT 20SEQ CERTIFIED The design of these furnaces have been certified for installation in recreational vehicles only In order for these furnaces to operate in conformity with generally accepted safety regulations the installation instructions outlined in this book must be followed Failure to comply with the installation instructions will void any responsibility of Suburban Manufacturing Company Your furnace was inspected before it left the factory If any parts are found to be damaged do not install the furnace Any damages should be reported to the transportation company immediately and the appropriate claims filed WARNING Improper installation adjustment alteration service or maintenance can cause property damage personal injury or loss of life Refer to the installation instructions and or owners manual provided with this appliance INSTALLATION INSTRUCTIONS WARNING Installation of this appliance must be made in accordance with the written instructions provided in this manual No agent representative or employee of Suburban or other person has the authority to change modify or waive any provision of the instructions contained in this manual CAUTION If possible do not install the furnace to where the vent can be covered or obstructed
29. TE These furnaces shall be installed so the electrical components are protected from water These furnaces will accommodate an installation depth from 21 to 27 depending the intake tube length you select See Figure 1 Please adhere strictly to the following instructions to insure proper installation and safe operation as well as adequate clearances for accessibility The efficiency rating of the appliance is a product thermal efficiency rating determined under continuous operating conditions and was determined independently of any installed system These furnaces are certified for use with propane LP gas only Gas supply pressure for purposes of input adjustment Maximum 13 W C Minimum 11 Gas Propane LP Water column Part Number 204877 8 1 2011 In the USA the installation must conform with local building codes In the absence of local building codes refer to the latest edition of 1 Standard for Recreational Vehicles NFPA 1192 2 National Fuel Code ANSI Z223 1 NFPA 54 3 The furnace must be electrically grounded in accordance with the latest edition of the National Electrical Code NFPA 70 4 The installation of the furnace shall be in accordance with any applicable local codes and regulations In Canada the furnace must be installed in accordance with 1 Standard CAN CSA Z240 0 2 08 Recreational Vehicles 2 CSA Standard CAN CSA Z240 6 2 08 C22 2 No Requirements fo
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31. e RV Therefore it is essential to insure that the vent cap and tube assemblies are properly installed 1 Apply caulking to RV skin behind vent cap as shown in Figure 6 Apply caulking generously around perimeter of vent cap and across center as shown 2 Insert intake tube through RV skin and slide it onto the furnace intake See Figure 1 Minimum tube overlap of is required 3 Insert vent cap exhaust tube through RV skin and slide it onto the furnace exhaust See Figure 1 Minimum tube overlap of 1 is required 4 Attach vent cap assembly to outer skin of RV with the six 6 screws provided Do not install vent assembly upside down The word Suburban must be right side up Due to high temperatures the unit should be located out of traffic and VENT TUBE INSTALLATION away from furniture and draperies Xe Children and adults should be alerted to the hazards of high surface temperatures and should stay away to avoid burns or clothing ignition VENT TUBE EXHAUST 8 X 2 O D Young children should be carefully supervised when they are in the same VENT MURE NTARE SEE CHART room as the unit 1 1 4 MIN OVERLAP ON EXHAUST Clothing or other flammable material should not be placed on or near the unit Any safety screen or guard removed for servicing the unit must be replaced prior to operating the unit The area around the unit must b
32. e kept clear from combustible materials gasoline and other flammable vapors and liquids Installation and repairs should be done by a qualified service person The unit should be inspected before use and at least annually by a qualified service person More frequent cleaning may be required due to excessive lint from carpeting bedding material etc It is imperative that control compartments burners and circulating air passageways of the unit be kept clean X050711 2 O D X 2 3 4 SPECIAL We 21 TO 23 1 4 X050712 2 X 5 STANDARD 23 1 4 TO 25 1 2 X050708 2 O D X 7 1 4 SPECIAL 25 1 2 TO 27 3 4 NEVER INSTALL VENT TUBES STANDARD TUBE FURNISHED WITH FURNACE WITH LESS THAN 1 2 OVERLAP THE SPECIAL TUBES IF NEEDED MUST ON INTAKE amp 1 1 4 ON EXHAUST BE ORDERED MOUNTING SURFACE 1 2 MIN OVERLAP OF INTAKE TUBE 21 PART NO INTAKE TUBE LENGTH ONLY X DIMENSION Figure 1 BACK OF FURNACE CABINET TRAILER SKIN 70 76 POWER SUPPLY 4 THERMOSTAT WIRES GAS INLET FOR ELECTRIC IGNITION MODELS SECURE UNIT IN PLACE WITH 2 SCREWS Figure 2 2 1 4 DIA TWO HOLES THROUGH TRAILER SKIN MOUNTING SURFACE POWER SUPPLY amp THERMOSTAT WIRES WITH 2 SCREWS Figure 3 VENT CAP OUTLINE 5 976 7 64 DIA 4 HOLES r 7 1 ie
33. floor using the two holes provided in furnace cabinet See Figure 2 or Figure 3 12 NOTE OPTIONAL DISCHARGE DUCT ADAPTER The cabinet has a 4 diameter knockout on the left side of cabinet See Figure 6A A 4 diameter connector can be attached to this location to provide a warm air discharge duct Not to exceed 10 in length CONNECTING GAS SUPPLY A flare connection is provided on the right side of the furnace for the gas supply connection to the furnace Connect the gas supply to the furnace at the manifold following the suggestions outlined below It will be necessary to hold the flare fitting on the furnace manifold when connecting or loosening gas lines NOTE Be sure all male joints have been treated with a sealing compound resistant to the action of liquefied petroleum LP gas In order to maintain a check on gas supply pressure to the furnace Suburban advises the installer to provide NPT plug tap for test gauge connection immediately upstream of the gas supply connection to the furnace NOTE The appliance must be disconnected from the gas supply piping system during any pressure testing of that system at test pressure in excess of PSIG The appliance must be isolated from the gas supply piping during any pressure testing of the gas supply piping system at test pressure equal to or less than 1 PSIG WARNING All joints must be checked for leaks Do not use open flame to check for leaks U
34. r Recreational Vehicles 148 08 Electrical 3 Standard CAN CSA Z240 4 2 08 Installation Requirements for Propane Appliances and Equipment in Recreational Vehicles 4 CAN CGA B149 Installation Codes 5 Any applicable local codes and regulations The furnace cabinet must extend through the coach cabinetry 1 3 8 as shown in Figure 1 The 1 extension must be held in order to assure that the front grille will properly attach to the furnace cabinet Adequate clearances must be maintained around furnace cabinet so that the unit will be accessible for servicing TO INSTALL THE FURNACE 1 Locate the furnace near lengthwise center of the coach Do not install the furnace with the vent facing toward the forward end of the coach 2 Select a location for installation out of the way of wires pipes etc that might interfere with installation Adhere to the following minimum clearances from the furnace cabinet to combustible construction Back 0 Floor 0 Top 5 8 Sides 5 8 NOTE Side and top clearances of furnace cabinet may be 0 for through the wall installations up to a maximum of 2 wall thickness See Figure 2 The following minimum clearances from the warm air discharge grille to combustible materials must be maintained See Figure 10 for 0 clearance of grille if framed Models 165 NT 20SEQ Front 24 Top 1 Left Side 1 Right Side 8 or Floor 1 Left Side 8 Right
35. se a soap and water solution CONNECTING ELECTRICAL SUPPLY CAUTION These furnaces are designed for a negative ground 12 volt D C system only Do not attempt to alter the furnace for a positive ground system or connect the furnace directly to 115 volts A C Damage to furnace component parts will occur Connect only to a protected circuit fused for not more than 7 5 amps Be sure all wiring to the furnace is of heavy enough gauge to keep the voltage drop through it to a minimum and to provide enough power for start up surge No 12 gauge wire is recommended If any of the original wire that is supplied with the appliance must be replaced it must be replaced with Type 105 C or its equivalent Connect the power supply to the red and yellow wires on the right side of the furnace The wires are color coded red for positive and yellow for negative This polarity must be observed so the furnace motor will run with the proper direction of rotation to insure correct air delivery See wiring diagram If the furnace power supply is to be from a convertor we recommend that the convertor system used to power the furnace be wired in parallel with the battery This will serve two purposes 1 Provide a constant voltage supply to the furnace 2 Filter any A C spikes or volt surges NOTE Furnace models NT 16SEQ AND NT 20SEQ are equipped with an electric ignitor device that has an energy consumption of 1 amps at 12 volts D C CONNECTING
36. when any door on the trailer is opened If this is not possible then the travel of the door must be restricted in order to provide a 6 minimum clearance between the furnace vent and any door whenever the door is open NOTE The exhaust temperature of this furnace could discolor or warp some materials You should verify that the material used on the coach door panel or cover will not discolor or warp from the exhaust temperature whenever any door panel or cover is in the open position CAUTION Due to the differences in vinyl siding this appliance should not be installed on vinyl siding without first consulting with the manufacturer of the siding or cutting the siding away from the area around the appliance vent CAUTION In any installation that has the exhaust intake vent covered or the minimum clearances to the room air grill reduced by some special feature of the RV such as a slide out pop up etc in the travel or storage mode a switch must be installed to insure unit is inoperable in this mode NOTE These furnaces must be installed and vented as described in this manual so that the negative pressure created by the air circulating return air fan cannot affect the combustion air intake or venting of any other appliance It is imperative that the products of combustion be properly vented to the atmosphere and that all combustion air supplied to burner be drawn from the outside atmosphere See Installing Vent Assembly NO
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