VERTICAL COMBUSTION AIR INLET KITS
Contents
1. Also Included 1 Part No J30 09023 Installation Instructions 1 Part No 11H03R03612 002 Tube of High Temp Silicone Sealant 08 13 Part No 11J37R02222 003 1 Flue Vent Terminal 2 Part No 11507R08951 1 Combustion Air Inlet Box Assembly see Figure 2b for dimensional data 3 Part No 11J37R08963 1 Air Inlet Vent Cap 4 Part No 11507R09011 1 Deflector Disk Also Included 1 Part No J30 09023 Installation Instructions 1 Part No 11H03R03612 002 Tube of High Temp Silicone Sealant amp MESTEK y INC D8980B A 260 NORTH ELM ST WESTFIELD MA 01085 TEL 413 568 9571 FAX 413 562 8437 www mestek com DIMENSIONAL DATA Figure 2a 5 Inch Combustion Air Inlet Box Assembly 5 75 a 146 1mm 203 2mm T go 15 p 381mm Po 2 2 Q o 5 o o o i Ly 127mm pi 304 8mm 127mm D9015B Figure 2b 6 Inch Combustion Air Inlet Box Assembly 1 0 6 75 254mm 171 45mm o o 17 125 435mm 6 152 4mm m 14 125 358 8mm 181mm D9016B VENTING GENERAL GUIDELINES All unit heaters must be vented All Venting installations shall be in accordance with the latest edition of Part 7 Venting of Equipment of the National Fuel Gas Code ANSI Z223 1 NFPA 54 or applicable provisions2. Ensure there is a minimum of 12 inches 305mm between the bottom of the flue vent terminal and the top of the air inlet vent cap See Figure 3a and Figure 4 Step 4 Connect flue pipe and combustion air pipe from the combustion air inlet box to the unit following instructions in the manual provided with the unit and Combustion Air and Exhaust Venting instructions on pages 7 and 8 AWARNING Never use pipe other than 5 inch diameter Never use PVC ABS or any other non metallic pipe for venting To do so may result in serious damage to the unit and or severe personal injury or death Figure 3a Vertical 5 Inch Combustion Air Inlet Kit Installation Note Separated Combustion Blower Type Unit Shown Seal All Joints Secure with a min of 3 corrosion resistant screws Approved Breidert Type L or Fields StarKap 12 Flue Vent Terminal 304 8mm Combustion Air Inlet Cap 2Feet 0 609m plus Max Snow depth for area Thimble Flue Pipe i 5 127mm Dia UL 1738 Listed Flue Pipe 8 203 2mm Dia Combustion Air Pipe Flue Pipe j 60 Max 1524mm ZZ i Combustion Air Inlet Box ji eee oa 4l Combustion Air Inlet Box K End of UL 1738 Listed Flue Pipe E Side View must protrude min of 6 152 4mm below Combustion Air Inlet Box D
3. Appliances are non condensing and operate with a positive vent pressure Category IV Covers condensing appliances with positive vent pressure NOTICE Category ll and IV do not apply to equipment specified within this manual Vent Systems Termination Clearance Requirements Structure Object Minimum Clearances for Termination Locations USA CANADA 1 ft 0 3m for 100 000 BTUH Door window or gravity vent inlet or FAL bataw input or less 3 ft 0 9m for i 4 ft horizontally i combustion air inlet for other appliances input exceeding 100 000 1 ft above BTUH Forced air inlet within 10 ft 3 ft above 6 ft 1 8m Adjoining building or parapet 10 ft 10 ft 3 04m Adjacent public walkways 7 ft above grade 7 ft 2 1m above grade Electric gas meters amp regulators 4 ft horizontal 3 ft 0 9m horizontally from meter regulator assembly 6 ft 1 8m any direction from a gas service regulator vent outlet Above grade level 1 ft 1 ft 0 3m Minimum above maximum snow depth or per local code whichever is greatest INSTALLATION VERTICAL TERMINATION 5 INCH KIT FOR USE WITH 100 250 MBH UNITS ONLY Select a location on the roof for vent terminal ensuring adequate space inside for combustion air inlet box Vent terminal must be at least 10 feet 3 04m from any wall or adjoining building See Table 1 and Figure 3a Cut hole through the roof
4. for 8 inch 203mm combustion air pipe The combustion air inlet box is to be suspended from the underside of the roof using suitable brackets field supplied Before mounting vent box cut a length of 8 inch UL 1738 listed pipe so that dimension A Figure 4 Step 1 is equal to the roof thickness plus 18 inches 457mm or the roof thickness plus the expected snow depth which ever is greater Fasten the 8 inch pipe to the combustion air inlet on the combustion air inlet box Seal the joint and fasten with sheet metal screws Insert the pipe through the roof and fasten vent box into place See Figure 4 Step 2 Flash and or caulk 8 inch pipe to roof See Figure 4 Step 3 Install the inlet air cap and fasten with sheet metal screws Insert a length of 5 inch UL 1738 listed vent pipe in the direction of flow pointing upward through the air inlet vent cap Vent pipe should be inserted into the combus tion air inlet box so that the pipe extends a minimum of 6 inches 152mm below the vent box for connection purposes This will allow room to seal the flue pipe Secure the UL 1738 listed pipe in position with 3 small evenly spaced sheet metal screws With high tempera ture silicone seal the space between the UL 1738 list ed pipe and the combustion air inlet box as well as the space between the UL 1738 listed pipe and the air inlet terminal See Figure 4 Step 4 Install the vent cap to the UL 1738 listed pipe using sheet metal screws
5. length of the combustion air system must not be less than 5 feet 1 5m and must not exceed 50 feet 15 2m Equivalent length equals the total length of straight pipe plus 10 feet 3 05m for each 90 elbow and 4 feet 1 22m for each 45 elbow NOTICE For optimum performance keep the com bustion air system as straight as possible 8 Each joint must be secured with at least three corrosion resistant screws Two full turns of 3M 425 Aluminum Foil Tape or its equivalent must then be used to seal each joint General Electric RTV 108 Dow Corning RTV 732 or an equivalent silicone sealant with a temperature rating of 500 F may be used instead of the tape EXHAUST VENTING A WARNING Never operate unit heaters without combustion air and flue gas piping in place or severe personal injury or death may occur 1 Vent system installation must be in accordance with the current National Fuel Gas Code NFPA 54 or ANSI Z223 1 National Fuel Gas Code In Canada installation must be in accordance with CSA B149 1 Installation Code for Natural Gas Burning Appliances and Equipment and CSA B149 2 Installation Code for Propane Burning Appliances and Equipment A factory supplied Combustion Air Inlet Kit which includes a combustion air inlet box air inlet screen deflector disk vent terminal and inlet air collar MUST be installed at the termination point of the combustion air vent system See Figures 1 2 3
6. 4 and 5 Each unit heater MUST have its own vent system It MUST NOT be connected to other vent systems or to a chimney 4 Use UL 1738 listed single wall pipe for the vent system For installations in Canada use corrosion resistant and gas tight listed vent pipe conforming with local building codes or in the absence of local building codes with current CSA B149 1 Installation Codes for Natural Gas Burning Appliances and Equipment or CSA B149 2 Installation Codes for Propane Gas Burning Appliances and Equipment For residential installations in the United States vent pipe approved for Category lll appliances must be used between the appliance and the combustion air inlet box Any run of single wall vent pipe passing through an unheated space must be insulated with insulation suitable to 550 F The vent system must be installed to prevent collection of condensate Pitch horizontal pipes downward 1 4 inch per foot 21mm per meter toward the vent cap to facilitate drainage The equivalent length of the vent system must not be less than 5 feet 1 5m and must not exceed 50 feet 15 2m The equivalent length equals the total length of straight pipe plus 10 feet 3 05m for each 90 elbow and 4 feet 1 22m for each 45 elbow Each joint must be secured with at least three corrosion resistant screws Two full turns of 3M 425 Aluminum Foil tape or its equivalent must then be used to seal each joint High temperature silicone sea
7. 738 listed pipe in position with 3 small evenly spaced sheet metal screws With high temperature silicone seal the space between the UL 1738 listed pipe and the combustion air inlet box as well as the space between the UL 1738 listed pipe and the air inlet terminal See Figure 4 Step 4 Install the vent cap to the UL 1738 listed pipe using sheet metal screws Ensure there is a minimum of 12 inches 305mm between the bottom of the flue vent terminal and the top of the air inlet vent cap See Figure 3b and Figure 4 Step 4 Connect flue pipe and combustion air pipe from the combustion air inlet box to the unit following instructions in the manual provided with the unit and Combustion Air and Exhaust Venting instructions on pages 7 and 8 AWARNING Never use pipe other than 6 inch diameter Never use PVC ABS or any other nonmetallic pipe for venting To do so may result in serious damage to the unit and or severe personal injury or death Figure 3b Vertical 6 Inch Combustion Air Inlet Kit Installation Note Separated Combustion Blower Type Unit Shown P Seal All Joints Secure with a min of 3 corrosion resistant screws Approved Breidert Type L or Fields StarKap Flue Vent Terminal 12 304 87mm 2 Feet 0 609m plus max snow depth for area Thimble 60 Max 1524mm Combustion Air Inlet Box Flue Pipe aS A A AU A AC Side View Combustion Air Inlet Ca
8. 9020C Rear View INSTALLATION continued VERTICAL TERMINATION 6 INCH KIT FOR USE WITH 300 400 MBH UNITS ONLY Select a location on the roof for vent terminal ensuring adequate space inside for combustion air inlet box Vent terminal must be at least 10 feet 3 04m from any wall or adjoining building See Table 1 and Figure 3b Cut hole through the roof for 10 inch 254mm combustion air pipe The combustion air inlet box is to be suspended from the underside of the roof using suitable brackets field supplied Before mounting vent box cuta length of 10 inch UL 1738 listed pipe so that dimension A Figure 4 Step 1 is equal to the roof thickness plus 18 inches 457mm or the roof thickness plus the expected snow depth whichever is greater Fasten the 10 inch pipe to the combustion air inlet on the combustion air inlet box Seal the joint and fasten with sheet metal screws Insert the pipe through the roof and fasten vent box into place See Figure 4 Step 2 Flash and or caulk 10 inch pipe to roof See Figure 4 Step 3 Install the inlet air cap and fasten with sheet metal screws Insert a length of 6 inch UL 1738 listed vent pipe in the direction of flow pointing upward through the air inlet vent cap Vent pipe should be inserted into the combustion air inlet box so that the pipe extends a minimum of 6 inches 152mm below the vent box for connection purposes This will allow room to seal the flue pipe Secure the UL 1
9. VCAK IOM 3 INSTALLATION AND SERVICE MANUAL J30 09023 VERTICAL COMBUSTION AIR INLET KITS CATEGORY III VENTING FOR SEPARATED COMBUSTION TUBULAR GAS FIRED UNIT HEATERS USE 5 INCH KIT FOR UNITS WITH CAPACITIES 100 000 TO 250 000 BTU HR USE 6 INCH KIT FOR UNITS WITH CAPACITIES 300 000 TO 400 000 BTU HR Supplement to unit installation instructions STPIM or STBII AWARNING mproper installation adjustment alteration service or maintenance can cause property damage injury or E death Read this supplement and the unit heater installation operating and maintenance instructions thoroughly before C US installing or servicing this equipment LISTED Intertek This Combustion Air Inlet Kit utilizes one 5 or 6 inch termination in which both the discharge flue gas and the combustion air inlet pass The location of the vent terminal must be in accordance with the National Fuel Code ANSI Z223 1 NFPA 54 in the U S or the Natural Gas Installation Code CSA B149 1 or the Propane Gas Installation Cade CSA B149 2 in Canada Minimum clearances are shown in Table 1 KIT CONTENTS Figure 1a 5 Inch Combustion Air Inlet Kit Figure 1b 6 Inch Combustion Air Inlet Kit Part No 11J37R02222 002 1 Flue Vent Terminal 2 Part No 11507R08560 1 Combustion Air Inlet Box Assembly see Figure 2a for dimensional data 3 Part No 11J37R08964 1 Air Inlet Vent Cap 4 Part No 11507R08568 1 Deflector Disk
10. lant may be used instead of the tape Silicone sealant must be used to seal the joint between the double wall vent pipe and the single wall pipe The exhaust vent system must remain at a minimum distance of 1 inch 25mm from all combustible materials Any part of the vent system that passes through a combustible material must be properly insulated NOTICE Increasing the clearance distances may be necessary if there is a possibility of distortion or discoloration of adjacent materials
11. of local building codes Refer to notes below for Canadian installations AWARNING CARBON MONOXIDE Your venting system must not be blocked by any snow snow drifts or any foreign matter Inspect your venting system to ensure adequate ventilation exists at all times Failure to heed these warnings could result in Carbon Monoxide Poisoning symptoms include grogginess lethargy inappropriate tiredness or flu like symptoms When an existing heater is removed or replaced in venting system the venting system may not be properly sized to vent the attached appliances An improperly sized vent system can cause formulation of condensate or leakage or spillage of flue gases The following steps shall be followed with each appliance connected to the venting system placed in operation while any other appliances connected to the venting system are not in operation 1 Seal any unused openings in the venting system Inspect the venting system for proper size and horizontal pitch as required in the National Fuel Gas Code ANSI 2223 1 NFPA 54 and these instructions Determine that there is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe condition 3 Insofar as practical close all building doors and windows and all doors between the space in which the appliance s connected to the venting system are located and other spaces of the building Turn on clothes dryers and any exhau
12. orm with local building codes or in the absence of local codes with current CSA B149 1 Installation Codes for Natural Gas Burning Appliances and Eguipment or CSA B149 2 Installation Codes for Propane Gas Burning Appliances and Eguipment 2 Any reference to U S standards or codes in these instructions are to be ignored and the applicable Canadian standards or codes applied VENTING GENERAL GUIDELINES continued Do not damper or add heat recovery devices to the flue piping Failure to open such a damper prior to operating the gas unit heater will result in the spillage of flue gas into the occupied space Avoid installing units in areas under negative pressure When required a flue vent fan should be installed in accordance with the instructions included with the fan Vent connectors serving Category and Category ll heaters shall not be connected into any portion of mechanical draft systems operating under positive vent pressure Maintain 1 inch 25 4mm clearance between the vent pipe and combustible materials Table 1 ANSI now organizes vented appliances into four categories Venting Categories Non Condensing Condensing Negative I Vent Pressure Positive lll IV Vent Pressure Category I Includes non condensing appliances with negative vent pressure like the traditional atmospheric unit heater Category ll Groups condensing appliances with negative vent pressure Category lll
13. p End of UL 1738 Listed Flue Pipe Must Protrude a min of 6 below the Combustion Air Box 6 152 4mm Dia UL1738 Listed Flue Pipe 10 254mm Dia Combustion Air Pipe Combustion Air Inlet Box 4 Flue Pipe D9021C Rear View INSTALLATION continued Figure 4 Vertical Combustion Air Inlet Kit Installation STEP 1 STEP 2 COMBUSTION AIR VENTING AWARNING Never operate unit heaters without combustion air and flue gas piping in place or severe personal injury or death may occur A WARNING CARBON MONOXIDE Your venting system must not be blocked by any snow snow drifts or any foreign matter Inspect your venting system to ensure adequate ventilation exists at all times Failure to heed these warnings could result in Carbon Monoxide Poisoning symp toms include grogginess lethargy inappropriate tiredness or flu like symptoms 1 The combustion air system installation must be in accordance with the current edition of the National Fuel Gas Code NFPA 54 or ANSI Z223 1 National Fuel Gas Code In Canada installation must be in accordance with CSA B149 1 Installation Code for Natural Gas Burning Appliances and Eguipment and CSA B149 2 Installation Code for Propane Burning Appliances and Eguipment 2 The combustion air inlet box inlet air screen deflector disk and vent terminal provided with the unit heate
14. r must be installed at the termination point of the combustion air vent system See Figures 1a 1b 2a 2b 3a 3b and 4 3 Each unit heater MUST have its own combustion air system It MUST NOT be connected to other air intake systems D9022 4 Use UL 1738 listed single wall pipe for the vent system For installations in Canada use corrosion resistant and gas tight listed vent pipe conforming with local building codes or in the absence of local building codes with current CSA B149 1 Installation Codes for Natural Gas Burning Appliances and Equipment or CSA B149 2 Installation Codes for Propane Gas Burning Appliances and Equipment For residential installations in the United States vent pipe approved for Category lll appliances must be used between the appliance and the combustion air inlet box AWARNING Never use pipe other than 5 or 6 inch diameter with respective Combustion Air Inlet Kits Never use PVC ABS or any other nonmetallic pipe for venting To do so may result in serious damage to the unit and or severe personal injury or death INSTALLATION continued Long runs of single wall combustion air piping passing through an unheated space may require insulating if condensation becomes noticeable The combustion air system must be installed to prevent collection of condensate Pitch horizontal pipes downward 1 4 inch per foot 21 mm m toward the inlet cap to facilitate drainage The equivalent
15. st fans such as range hoods and bathroom exhausts so they shall operate at maximum speed Do not operate a summer exhaust fan Close fireplace damper 4 Follow the lighting instructions Place the appliance being inspected in operation Adjust thermostat so that the appliance will operate continuously 5 After it has been determined that each appliance connected to the venting system properly vents when tested as outline above return doors windows exhaust fans fi replace dampers and any other gas burning appliance to their previous condition of use 6 If improper venting is observed during any of the above tests the venting system must be corrected immediately so that the system conforms with the National Fuel Gas Code ANSI Z223 1 NFPA 54 When resizing any portion of the venting system the venting system should be resized to approach the minimum size as determined using the appropriate tables in Appendix G of the National Fuel Gas Code ANSI Z223 1 NFPA 54 The unit heater shall be connected to a factory built chimney or vent complying with a recognized standard or a masonry or concrete chimney lined with a lining material acceptable to the authority having jurisdiction Venting into an unlined masonry chimney is prohibited ADDITIONAL REOUIREMENTS FOR CANADIAN INSTALLATIONS The following instructions apply to Canadian installations in addition to installation and operating instructions 1 Installation must conf
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