2525 W CASINO RD BASE FILE 2025-01-03

installation VENTING CAUTION densation and maintain draft head. Provide a drip leg Gas Unit Heaters must be vented—do not operate unvented. with a clean out cap at bottom of vertical pipe. 10.Top of vertical stack should extend at least 2%'above A built-in draft diverter is provided—additional external diverters high point of roof. Use of weather cap will reduce down- are not required or permitted. drafts and moisture in vent. Units using single-stagegas controls can be installed with a 11.Use of dampers or other devices in vents are not Category I ventt system. allowed. Some units which are supplied with two-stage,or modulating gas 12.When connecting vent to existing chimney,do not push controls may require a Category 11 vent system.Refer to the vent pipe beyond internal surface of chimney. table below to determine the vent category required for each PA/PAE and BA/BAE model unit heater. 13. For more than one vent into a stack or chimney,they Gas-fired heating equipment which has been improperly vented, should enter at different levels. or which experiences a block vent condition may have flue gases 14. In general, a common stack or chimney must have an accidentally spilled into the heated space.See page 20 for spe- equivalent cross-sectional area of all vents entering the cific information about the blocked vent safety switch supplied on stack. the unit. 15. Do not install a gravity vented unit in a common stack The installation must conform with local building codes with power exhausted equipment. or in the absence of local codes,with the National Fuel 16. Do not install gravity vented units in buildings or areas Gas Code,ANSI Z223.1 latest edition,or in Canada which experience negative pressure conditions. CAN/CGA-B149.1 "Installation Code for Natural Gas I WEATHER BurningAppliances"and CAN/CGA-B149.2"Installation `AP PP MINIMUM ISS' Code for Propane Burning Appliances". -T APPROVED TYPE CHIMNEY The following suggestions should be observed. Figure 3 INSULATE INSULATE CAREFULLY 1. Comply with local code venting regulations. Heater Venting POPE FROM 2 Select size of vent pipe to fit opening at rear of unit(see OOLo SPACE THROUGH LE page 10 for dimensions).Do not use a vent pipe smaller CEILING than the vent on the unit. Pipe should be no less than 24- DRIP LEG WITH ga.galvanized steel or other suitable rust-resistant metal. = CLEAN OUT CAP Use an approved-type chimney'when the vent passes UNIT ,.0.. through a floor or roof. SLOPE V'TO THE FOOT 3. Keep vent pipe at least 6"from combustible material. AX The minimum distance from combustible material is based Model Number Gas Controls vent category on the combustible material surface not exceeding 160°F. Clearance from the top of the unit may be required to be PAE 30 Single-Stage I greater than 6"if heat damage,other than fire(such as mate- Two-Stage II rial distortion or discoloration) may occur to materials above Single-Stage 1 the unit heater at the temperature described. PAE/BAE 50 Two-Stage II Modulating II Insulate carefully around section of vent pipe passing Single-Stage 1 through combustibles.Where vent passes through floor or PAE/BAE 75 Two-Stage II roof an opening 4"greater than vent diameter is necessary. If Modulating II there is 6'or more of vent pipe in the open space between Single-Stage I the unit heater and where the vent pipe passes through floor PAE/BAE 100 Two-Stage u or roof,the opening in the floor or roof need only be 2" Modulating II greater than the diameter of the vent pipe. Single-Stage T PAE/BAE 125 Two-Stage I 4. Category I and II unit heaters are defined as having neg- Modulating 1 ative pressure vent systems and must not be common Single-Stage I vented with positive pressure vent systems serving PAE/BAE 145 Two-Stage I Category III and IV appliances. Modulating 1 5. Category II vent systems must be installed to prevent Single Stage 1 PAE/BAE 175 Two-Stage I accumulation of condensation in the vent system,and Modulating I shall have a means provided for drainage of vent con- Single-Stage 1 densate.The drip leg should be cleaned annually. PAE/BAE 200 Two-Stage 1 6. A Category II vent system shall be water tight. Modulating I 7. Limit vent pipe horizontal runs to 75%of vertical height Single Stage I P P 9 PAE/BAE 225 Two-Stage I with a minimum upward slope from unit of per foot Modulating I and suspend securely from overhead structure at points Single-Stage I no greater than 3 feet apart. For best venting,put as much PAE/BAE 250 Two-Stage I vertical vent as close to the unit as possible. Fasten Modulating I individual lengths of flue together with metal screws. Single-Stage 1 PAE/BAE 300 Two-Stage 1 8. Keep flue pipes as straight as possible,avoiding sharp Modulating 1 bends.When venting into a common flue,the area of the Single-Stage 1 flue should be equal to or greater than the combined PA/BA 350 Two-Stage I areas of the individual vents. Modulating I I 9. Where possible, avoid venting through unheated space. Single-Stage I When necessary,insulate pipe from cold to prevent con- FA BA 40o ModulaTwo-Stting I P P P Modulating I Page 4