PB Heat DE manual Equivalent Vent Length

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VENTING

2.Refer to Table 4.2 for minimum and maximum vent length allowed.

3.Maintain a minimum 2” (51 mm) clearance between vent pipe and combustible construction.

4.When installing vent pipe through a combustible wall, pipe must pass through a metal wall thimble; maintain a 2” (51 mm) clearance between vent pipe and thimble. Follow thimble manufacturer’s instructions. Seal between thimble and exterior wall using exterior-rated caulk or silicone to prevent water damage and also to prevent recirculation of flue products into the structure.

5.Determine vent terminal location.

a.Vent terminal shall be located at least 3 feet (1 meter) above any forced air inlet located within 10 feet (3 meters).

b.Vent terminal shall be located at least 4 feet (1.2 meters) below, 4 feet (1.2 meters) horizontally from, or 1 foot (0.3 meters) above any door, window, or gravity air inlet into any building.

c.Vent terminal shall be located at least 1 foot (0.3 meters) above ground level or normal snow lines. See subsection 7 below if terminal needs to be extended above ground level or snow line.

d.Vent terminal shall not be located over public walkways where condensate could create a nuisance or hazard.

e.When adjacent to a public walkway, vent terminal shall be at least 7 feet (2.1 meters) above grade.

f.Vent terminal shall be located at least 4 feet (1.2 meters) horizontally from electric meters, gas meters, regulators and relief equipment. In Canada, this dimension must be 6 feet (2 meters).

g.Vent terminal should not be located directly under roof overhangs to prevent icicles from forming.

6.Vent Pipe Assembly:

a.Horizontal portions of the vent pipe shall slope down not less than 1/4” per foot (21 mm per meter) from the boiler to the vent termination elbow. If this horizontal run is pitched toward boiler, provide a horizontal drain tee as per instructions in section D. Direct Exhaust; Vertical Venting.

b.Secure vent pipe using metal strapping, clamps and/or other means. Do not screw into the vent pipe.

•Horizontal portions of the vent pipe must be supported at intervals no greater than four feet to prevent sagging/separation.

•Secure vent pipe to the thimble/wall to prevent possible movement from incidental contact on the vent terminal.

c.Type vent material approved is AL29-4C, 3 inch (76 mm) diameter stainless steel; manufactured by Heat-Fab®(Saf-T-Vent); Z-Flex®(Z-Vent); ProTech (FasNSeal™); Flex-L (StaR-34); Metal- Fab (Corr/Guard).

d.Attach the fan adapter to blower outlet flange using gasket and 1/4” (6 mm) -20 nuts and washers, (parts located in miscellaneous parts box).

e.Refer to Figure 4.3 that lists special vent adapters for connection to boiler fan adapter. These special adapters are not supplied with boiler.

f.Attach vent pipe adapter to boiler fan adapter by applying a 1/4” (6 mm) bead of high temperature silicone around diameter of fan adapter and slip vent pipe adapter over the fan adapter. Fill in any voids with silicone and smooth out with moistened finger or flat tool.

g.If using Z-Flex®pipe, slide vent pipe over the first 2-1/2” (64 mm) of the fan adapter and secure joint connection with the Z-Flex®looking bands making sure that locking band has contact with fan adapter at boiler end and vent pipe.

h.Attach remaining pipe and fittings per manufacturer’s vent instructions. Use only the silicone recommended by the vent pipe manufacturer.

i.The only approved vent termination is a 3”(76 mm) 90° elbow. Refer to Figure 4.4. Vent pipe must be sealed to the thimble (or outside wall if- non-combustible construction) using silicone to prevent recirculation of flue products into the structure.

Table 4.2.: Equivalent Vent Length

*Equivalent Length of 3” diameter

Stainless Steel Vent Pipe

Boiler Model Minimum Vent Length Maximum Vent Length

DE-03

2-1/2 feet (762 m)

50 feet (15 m)

DE-04

2-1/2 feet (762 m)

50 feet (15 m)

DE-05

2-1/2 feet (762 m)

45 feet (13.7 m)

DE-06

2-1/2 feet (762 m)

45 feet (13.7 m)

*Maximum Vent Length to be reduced by 5 feet (1.5 meters) for each 90° elbow added that is manufactured by Z-Flex®, Heat-Fab®and Protech.

*Maximum Vent Length to be reduced by 7-1/2 feet (2.3 meters) for each 90° elbow added that is manufactured by Flex-L.

The outside vent terminal (90° Elbow) is not included in Equivalent Vent Length.

7.Refer to Figure 4.2 for vertical offset option. The maximum offset is 5 feet. With the exception of the last 90° elbow which serves as the vent terminal, the additional elbows and straight vent pipe must be considered when determining maximum vent length. Provide a horizontal drain tee as described in Section D. Direct Exhaust; Vertical Venting.

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Contents Series DE Table of Contents Special Attention Boxes Using this ManualInstallation Sequence Clearance from Combustible Construction PreinstallationAccessibility Clearances AIR for Combustion and VentilationWhere Ifan = Input of the fan assisted appliances in Btu/hr Required Volume other =Air Openings All Air from Outdoors through Vertical Ducts Mechanical Combustion Air SupplyCombustion Air Ducts Installation SurveyPlanning the Layout Boiler SET-UP Water Piping and Controls Boiler Supply and ReturnSafety Relief Valve Parallel Hook-up with Water ChillerPiping for Zoned Systems Zone Piping with Zone ValvesFreeze Protection Expansion TankINDIRECT-FIRED Water Heater For new or existing systems that must be freeze- protectedChimney Venting VentingGeneral Direct Exhaust Horizontal VentingEquivalent Vent Length Direct Exhaust, Sidewall Venting with Vertical Off-Set Direct Exhaust Vertical Venting Direct Exhaust Sidewall VentingBoiler Removal from Common Venting System Seal any unused openings in the common venting systemGAS Piping Gas Connection to BoilerNatural Gas Electrical Wiring ControlsZoned System Wiring Wiring and Connection Diagram Sequence of OperationIgnition System Operating Sequence Zone Wiring with Zone Valves START-UP Procedures Completing the InstallationValve Tapping and Adjustment Screw Locations For Your Safety Read Before Lighting Checking Burner Input Adjustment of GAS Pressure RegulatorControl Descriptions See .1 in Electrical for locations of these devicesCHECK-OUT Procedure START-UP Procedures Measuring Suction Pressure TroubleshootingTroubleshooting Guides Procedure For Measuring Fan Suction Pressure Boiler Troubleshooting Guide Burners Functioning See FigureBoiler Troubleshooting Guide Burners Not Functioning Maintenance Monthly with Boiler in USE Daily with Boiler in USEWeekly with Boiler in USE Annually Before Start of Heating Season Intermittent Pilot and Main Burner FlameBoiler Dimensions & Ratings Series DE Boiler RatingsRepair Parts Repair Parts Series DE GAS BoilerBase/Burners/Manifold Repair Parts Page Page Series DE

DE specifications

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