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Lifebreath 40DHWH(T) Pitot Tube and Gauge, Figure A, Figure C, Placement of the Pitot Tube

Models: 40DHWDF(T) 4TONVENTAC 60VENTAC 40VENTAC 60DHWH(T) 4TONDHW(T) 60DHW(T) 40DHWH(T) 60DHWDF(T) 40DHW(T)

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Pitot Tube and Gauge

Pitot Tube and Gauge

DUCT

AIR

FLOW

Pitot tube

Magnehelic gauge

Figure A

This is an example for determining the airflow in a 6" duct. The Pitot tube reading was 0.025 inches of water. From the chart, this is 640 feet per minute.

The 6" duct has a cross sectional area of:

=[3.14 x (6"÷12)2]÷4

=0.2 square feet

The airflow is then:

640 ft./min. x 0.2 square feet = 128 cfm

For your convenience, the cross sectional area of some common round duct is listed below: DUCT DIAM. (inches) CROSS SECTION AREA (sq. ft.)

	5.0	.14
	6.0	.20
	7.0	.27
		INSULATED PIPE
		WITH VAPOUR
	BUILT-IN	BARRIER
	BUILT-IN
	BALANCING	OUTSIDE
	DAMPERS	OUTSIDE
	DAMPERS	HOOD
		HOOD
		BACK DRAFT
		DAMPER
		Figure C

Placement of the Pitot Tube

Pitot Tube

Note: For best results keep Pitot tube

well away from dampers.

Figure B

The accuracy of the airflow reading will be affected by how close to any elbows or bends the readings are taken. Accuracy can be increased by taking an average of multiple readings as outlined in the literature supplied with the Pitot tube.

Balancing Collar Instructions

Push and turn with slotted screwdriver. Damper automatically locks when pressure is released.

Insulated flexible

ducting

When connecting ductwork to the collar, take note where screws are located. Screws should be located no further than 1/2” from outside edge of collar, so as not to impede operation of the damper.

1/2”

Figure D

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Image 26

Lifebreath 40DHWH(T), 60DHW(T) Pitot Tube and Gauge, Figure A, Figure C, Placement of the Pitot Tube, Figure B, Figure D

Contents

40DHWT For ModelsOPERATION, SIZING AND INSTALLATION MANUAL 60DHWTTable of Contents HRV - Aluminum Core IntroductionNutech Energy Systems Inc ERV - Enthalpic Paper CoreDescription and Purpose IMPORTANT NOTEClosed Loop System Combo System Basic PrinciplesClosed/Open Combo System Water Piping Call for Space Heating Only OperationAir System Circulation PumpGlobe Valve Gate Valve Manual ValvesBalance Valve Ball Valve Throttling Valve Shut Off ValvesDrain Valve Check ValvesAnti-ScaldValve Expansion Tankscold Off Season Circulation ControlsEnergy Saving Room Thermostat Water Heater ThermostatRoom Thermostat Air Handler Output CapacityHead Pressure Design vs. Field ConditionsWater System Pressures Flow RateWarranty SpecificationsDimensions & Clearances Model 40DHW Up FlowDimensions & Clearances Model 60DHW Up FlowSpecifications WarrantyDimensions & Clearances Model 40DHWDF Down FlowSpecifications WarrantyDimensions & Clearances Model 60DHWDF Down FlowSpecifications WarrantyDimensions & Clearances Model 40DHWH HorizontalSpecifications WarrantyDimensions & Clearances Model 60DHWH HorizontalSpecifications WarrantyWarranty SpecificationsDimensions & Clearances Filters CaseSpecifications Model 40VENTACCore Filters Case Dimensions & ClearancesDimensions & Clearances Model 60VENTACSpecifications WarrantyDimensions & Clearances Model 4TONVENTACSpecifications WarrantyDuct Connections INSTALLATIONLocating The Unit Option 1 - Ventilation Ports Off Left SideDucting Option 2 - Ventilation Ports Off Right SideHorizontal Version Outside Ducting the Weatherhoods Locating Intake WeatherhoodLocating the Exhaust Weatherhoods Locating WeatherhoodPrior to balancing, ensure that Balancing ProcedurePitot Tube Air Flow Balancing Figure A Placement of the Pitot TubePitot Tube and Gauge Figure CPiping HRV Drain Line DiagramDrain Line Plumbing Clean Air Furnace - Wiring Diagram ElectricalOptional Dehumidistat Start-UpProcedure Heating/Cooling Optional Circulation Timer ModelsOperation VentilationPump is noisy TroubleshootingLack of heat HRV core freezes upHumidity levels are too low Water sits in drain pipesCondensation/ice forming inside ventilation ducts Humidity levels are too highWater Pump Performance Specifications System CommissioningDESIGNED EQUIPMENT Cooling WORKSHEET FOR INTEGRATED COMBO SYSTEM DESIGNDESIGNED EQUIPMENT VENTILATION SYSTEM IntegratedAIR HANDLER Part A - DESIGN LOAD SPECIFICATIONSPart C - EQUIPMENT SELECTION Water Heater COOLING EQUIPMENTTABLE A 1 NATURAL GAS AND PROPANE METHOD A - domestic hot water usage for C.1METHOD B - domestic hot water usage for C.2 TABLE A 2 OILTABLE D PART D - PROVING REQUIRED WATER FLOWTABLE D Submitted For Owner INSTALLED EQUIPMENTCOMMISSIONING OF INTEGRATED COMBO SYSTEM By ContractorPart F - SYSTEM COMMISSIONING Part E - SYSTEM START UPHRV BALANCING 511 McCormick Blvd. London, Ontario N5W 4C8