Lifebreath 60DHW(T), 60VENTAC, 40VENTAC Water Heater Thermostat, Energy Saving Room Thermostat

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Water Heater Thermostat

The water heater thermostat is set by the installing contractor to provide the required temperature at the hot water outlet of the water heater. It is important that a warning label be place near the water heater thermostat telling the homeowner not to change the thermostat setting. The label is included with the furnace.

The hot water inlet temperature is typically 140˚F (60˚C). If this temperature must be increased to achieve higher outputs from the furnace an anti-scald valve must be used to prevent domestic hot water temperatures above 140˚F (60˚C). The manufacturer of the Hot Water Tank should be consulted for temperatures higher than 140˚F.

Room Thermostat

The room thermostat controls both the water circulation pump and the air circulation fan. It should be on a centrally located, inside wall away from any source of heat such as diffusers, appliances and direct sunlight.

Energy Saving Room Thermostat

A set back thermostat or “smart stat” can be used with a combo system, but care must be taken in the timing of the temperature changes. The timing of morning warm up should be early enough that the desired air temperature has been reached before the people begin to use domestic hot water. The highest demand for space heating is during the morning warm up and the highest demand for domestic hot water is during morning showers. Even if the water heater is properly sized, it may not be able to meet this combined load. Therefore, large set backs should be avoided.

Air Handler Output Capacity

There are four factors that will significantly affect the heating output of the air handler.

They are:

•Hot water supply temperature (EWT)

•Hot water flow rate (GPM)

•Air Handler return air temperature

•Air Handler air flow rate (CFM)

Hot Water Flow Rate

The hot water entering the water coil is the source of heat to the air handler. The effect of changing the amount of water entering the coil is the same as changing the water temperature. As water flow is reduced, the output of the air handler and the air temperature rise will both be lowered.

Air Handler Return Air Temperature

The return air temperature entering the air handler is approx. 60˚F (33˚C) below the hot water inlet temperature. If the return air temperature entering the air handler is reduced, more heat transfer will occur and the output of the air handler will increase.

Air Handler Air Flow Rate

The air entering the air handler can only be warmed by the temperature difference between the hot water and the cool air. As the volume (CFM (L/s)) of air is reduced, the amount of heat which can be transferred is also reduced.

Air Handler Temperature Rise

In a fuel fired furnace, the combustion gases can be 1000˚F (538˚C) above the return air temperature. These units typically have a temperature rise from 50˚F (10˚C) to 90˚F (32˚C) and therefore delivers air at the diffuser at 120˚F (49˚C) to 160˚F (71˚C).

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Contents OPERATION, Sizing and Installation Manual Table of Contents Introduction Description and Purpose Combo System Basic Principles Closed/Open Combo SystemAir System Call for Space Heating Only OperationCall for Domestic Hot Water and Space Heating Operation Water PipingManual Valves Throttling Valve Shut Off ValvesDrain Valve Check ValvesAnti-Scald Valve Expansion TanksCold Off Season Circulation ControlsWater Heater Thermostat Air Handler Return Air TemperatureAir Handler Temperature Rise Room ThermostatHead Pressure Design vs. Field ConditionsWater System Pressures Flow RateModel 40DHW Up Flow Dimensions & ClearancesWarranty Filters CaseModel 60DHW Up Flow 60DHWModel 40DHWDF Down Flow 40DHWDFModel 60DHWDF Down Flow 60DHWDFModel 40DHWH Horizontal 40DHWHModel 60DHWH Horizontal 60DHWHHigh CFM Lower Btuh Output 4TONDHWCore Filters Case Model 40VENTAC40VENTAC Model 60VENTAC 60VENTACModel 4TONVENTAC 4TONVENTACDuct Connections Locating The UnitOption 1 Ventilation Ports Off Left Side Horizontal Version Option 2 Ventilation Ports Off Right SideDucting Outside Ducting the Weatherhoods Locating Intake WeatherhoodLocating the Exhaust Weatherhoods Locating WeatherhoodPitot Tube Air Flow Balancing Balancing ProcedurePrior to balancing, ensure that Pitot Tube and Gauge Placement of the Pitot TubeBalancing Collar Instructions Drain Line HRV Drain Line DiagramPiping Plumbing Water HeaterClean Air Furnace Wiring Diagram ElectricalOptional Dehumidistat Start-Up Procedure Following conditions must be met prior to start-upHeating/Cooling Optional Circulation Timer ModelsOperation VentilationPump is noisy TroubleshootingLack of heat HRV core freezes upCondensation/ice forming inside ventilation ducts During cooling cycle, hot water circulates through the coilWater sits in drain pipes Humidity levels are too lowWater Pump Performance Specifications System CommissioningWorksheet 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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