Lifebreath 4TONVENTAC, 60DHW(T), 60VENTAC Combo System Basic Principles, Closed/Open Combo System

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Combo System Basic Principles

Closed/Open Combo System

From the aspect of delivery of domestic hot water and space heating, the Open and Closed systems operate the same. A system becomes closed when a backflow prevention valve or check valve is installed in the cold water piping upstream of the water heater. A backflow prevention valve will prevent the pressure created when water is heated in the water heater, from being relieved into the cold water system.

Therefore, an expansion tank (or equivalent device) may be installed as part of any closed system. The operations of the valve and expansion tank are discussed later in this section of this manual.

Note: Water systems that incorporate a pressure tank (well systems) are normally open systems.

COLD WATER INLET

DOMESTIC HOT WATER

 

 

CHECK

 

 

 

 

VALVE

 

 

 

 

VALVE

 

 

 

 

(shut off)

ANTI-SCALD VALVE

SUPPLY AIR

COOLING COIL

SCHEMATIC SYSTEM

 

(WHEN REQUIRED)

 

(OPTIONAL)

EXPANSION TANK

 

VALVE

 

DIAGRAM

(WHEN REQUIRED)

 

 

 

OR OTHER MEANS

 

(shut off)

 

 

 

 

 

RETURN AIR

(Closed Loop System)

 

 

 

 

 

VALVE

VALVE

 

 

 

(shut off)

(balancing)

 

 

 

 

CHECK

 

 

 

WATER HEATER

VALVE

 

 

 

 

 

 

 

 

HEATING COIL

 

 

 

 

HRV/ERV CORE

 

 

 

 

DRAIN

 

 

 

 

VALVE

 

 

 

 

BLOWER

 

 

SCHEMATIC SYSTEM DIAGRAM (Open System)

Note:

Plumbing components and system configuration may vary from diagram portrayed. Refer to local codes, local bylaws and installation manuals supplied with water heater before starting any installation work.

COLD WATER INLET

DOMESTIC HOT WATER

 

 

VALVE

 

 

 

(shut off)

ANTI-SCALD VALVE

SUPPLY AIR

COOLING COIL

 

 

(OPTIONAL)

 

(WHEN REQUIRED)

 

 

 

 

 

VALVE

 

 

 

(shut off)

 

 

 

 

 

RETURN AIR

 

VALVE

VALVE

 

 

(shut off)

(balancing)

 

 

 

CHECK

 

 

WATER HEATER

VALVE

 

 

 

 

 

 

HEATING COIL

 

 

 

HRV/ERV CORE

 

 

 

DRAIN

 

 

 

VALVE

 

 

 

BLOWER

 

 

5

 

 

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Page 4 Page 6
Contents OPERATION, Sizing and Installation Manual Table of Contents Introduction Description and Purpose Closed/Open Combo System Combo System Basic PrinciplesCall for Domestic Hot Water and Space Heating Operation Call for Space Heating Only OperationAir System Water PipingManual Valves Drain Valve Shut Off ValvesThrottling Valve Check ValvesCold Expansion TanksAnti-Scald Valve Off Season Circulation ControlsAir Handler Temperature Rise Air Handler Return Air TemperatureWater Heater Thermostat Room ThermostatWater System Pressures Design vs. Field ConditionsHead Pressure Flow RateWarranty Dimensions & ClearancesModel 40DHW Up Flow Filters Case60DHW Model 60DHW Up Flow40DHWDF Model 40DHWDF Down Flow60DHWDF Model 60DHWDF Down Flow40DHWH Model 40DHWH Horizontal60DHWH Model 60DHWH Horizontal4TONDHW High CFM Lower Btuh Output40VENTAC Model 40VENTACCore Filters Case 60VENTAC Model 60VENTAC4TONVENTAC Model 4TONVENTACOption 1 Ventilation Ports Off Left Side Locating The UnitDuct Connections Ducting Option 2 Ventilation Ports Off Right SideHorizontal Version Locating the Exhaust Weatherhoods Locating Intake WeatherhoodOutside Ducting the Weatherhoods Locating WeatherhoodPrior to balancing, ensure that Balancing ProcedurePitot Tube Air Flow Balancing Balancing Collar Instructions Placement of the Pitot TubePitot Tube and Gauge Piping HRV Drain Line DiagramDrain Line Water Heater PlumbingElectrical Clean Air Furnace Wiring DiagramOptional Dehumidistat Following conditions must be met prior to start-up Start-Up ProcedureOperation Optional Circulation Timer ModelsHeating/Cooling VentilationLack of heat TroubleshootingPump is noisy HRV core freezes upWater sits in drain pipes During cooling cycle, hot water circulates through the coilCondensation/ice forming inside ventilation ducts Humidity levels are too lowSystem Commissioning Water Pump Performance SpecificationsWorksheet for Integrated Combo System Design Part a Design Load Specifications Method a domestic hot water usage for C.1 Part D Proving Required Water Flow Commissioning of Integrated Combo System HRV Balancing McCormick Blvd. London, Ontario N5W 4C8

40DHWDF(T), 4TONVENTAC, 60VENTAC, 40VENTAC, 60DHWH(T) specifications

Lifebreath is a leading manufacturer specializing in indoor air quality solutions, with their series of heat recovery ventilators tailored for both residential and commercial applications. Among their advanced systems, the Lifebreath 60DHW(T), 60DHWDF(T), 4TONVENTAC, 40DHW(T), and 40DHWDF(T) provide exceptional ventilation performance alongside energy efficiency.

The Lifebreath 60DHW(T) and 60DHWDF(T) models are designed for larger spaces, featuring an impressive air flow rate of 60 CFM, making them ideal for homes and businesses that require a robust ventilation solution. These units incorporate a state-of-the-art heat exchange core, allowing for the transfer of heat from outgoing stale air to incoming fresh air, thereby minimizing energy loss.

The significant advantage of Lifebreath's 60DHW series lies in its dual-fan operation, which delivers balanced air flow while maintaining a comfortable indoor climate. Both models are equipped with advanced filtration systems, providing effective capture of airborne pollutants and allergens, promoting optimal air quality.

Moving to the Lifebreath 4TONVENTAC, this unit offers a unique combination of ventilation and cooling functionalities, making it suitable for environments with varying weather conditions. With a 4-ton capacity, it is perfect for larger commercial establishments. The 4TONVENTAC employs innovative technology for efficient energy use, incorporating variable speed drives to adapt to changing ventilation demands, ensuring maximum energy conservation and performance.

The Lifebreath 40DHW(T) and 40DHWDF(T) are perfect for smaller residential applications. With an airflow capacity of 40 CFM, these units maintain comfort without over-ventilating. Similar to the 60DHW models, they feature the same exceptional heat exchange technology to promote energy savings. The 40DHW series also includes user-friendly controls and monitoring features, enabling homeowners to adjust settings for optimal performance based on their specific needs.

A common characteristic across all these models is Lifebreath’s commitment to durability and reliability. Made from high-quality materials, they are built to withstand varying environmental conditions while providing long-lasting service. With easy installation and low maintenance requirements, these heat recovery ventilators prove to be a smart investment for users looking to improve their indoor air quality while reducing energy costs.
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