Heat Pump Water Heater (HPWH)
Fully integrated Heat Pump Water Heater 40-119 Gallon Capacity
The Hubbell Model PBX water heater incorporates a number of features not found in other conventional heaters which makes it better suited to resist the highly corrosive effects of hot water. The heart of a Hubbell water heater is a superior storage vessell which utilizes a specially formulated Hydrastone cement lining, solid copper-silicon threaded tank openings and a built-in heat trap device, all of which ensure a longer lasting and energy efficient water heater.
When you specify and install a Hubbell Model PBX, you will have confidence in knowing that the owner will be provided with a long lasting, trouble-free water heater.
- How It
- Sizing &
- Formulas &
- Heat pump transfer heat from surrounding air into the hot water tank
- Industry leading efficiency
- Insulated with 3" thick CFC free polyurethane foam insulation to minimize stand-by heat loss
- Hydrastone Cement lining ensures long tank life
- Proven Heat Pump technology
- Incoloy Sheathed back-up electric heaters resist corrosion and mineral build up
- Fully integrated water heater easily replaces a standard electric water heater
- User friendly electronic controller simplifies operation, maintenance, and trouble shooting
- Low maintenance design
- Designed for simple installation and service by a professional plumber
How the Hubbell Heat Pump Water Heater Works
The Hubbell Model PBX Heat Pump Water Heater uses a small amount of electricity to transfer heat from the air to water. In comparison, traditional electric water heaters use resistive heating elements to directly heat water. The Hubbell Model PBX is significantly more energy efficient compared to a conventional electric water heater because less electricity is required for a heat pump water heater to produce the same amount of hot water a a traditional electric water heater.
Quite simply, a heat pumps works like a refrigerator in reverse. A refrigerator moves heat from inside the refrigerator (making things cold) and transfers that heat energy to the surrounding room. A heat pump water heater on the other hand pulls free and essentially unlimited heat from the surrounding air and transfers that heat to the hot water stored in the tank.
The Hubbell Model PBX Heat Pump Water Heater can pull heat out of air as cool as 40°F, and if it cannot provide enough heating capacity to meet demand, the water heater includes back-up resistive heating elements to ensure the unit provides sufficient hot water. The heat pump process of removing heat from the air and transferring it to the water results in the exhaust of cooler dryer air, with as much as 0.4 gallons per hour of "free" dehumidification provided by the heat pump when the unit is heating water.
Heat Pump Functions
- The built in fan draws room air into the water heater heat pump compartment and across an evaporator coil, and exhausts cooler and slightly dryer (dehumidified) air.
- The evaporator coil captures heat energy in the air and transfers that energy to a specially formulated CFC free refrigerant contained within the evaporator.
- The refrigerant changes from a liquid to a gas as it gets warmer.
- The refrigerant, now as a warm gas, exits the evaporator and passes into a compressor.
- The warm gas is compressed, causing it to become a superheated hot gas and then flows to the heat exchanger.
- The heat exchanger transfers heat energy from the superheated hot gas to the cold water from the tank.
- The pump circulates cold water from the tank through the heat exchanger resulting in a continuous transfer of heat energy from the superheated gas to the water.
- Hot water exits the heat exchanger and is stored in the tank.
- The superheated gas condenses back to a liquid and awaits to repeat the process.
Model PBX Water Heater Specifications
Refrigerant: R426A (CFC Free)
Over Pressure Safety: Manual Reset
Field Chargeable: No
Air Flow (High Fan): 450 CFM
Air Flow (Low Fan): 250 CFM
Air Filtration: Washable / Removable
Ambient Air Range: 40-110°F
High Fan: 680 Watts
Low Fan: 614 Watts
Tank: 10 Years
Parts: 6 Years
Selectable Operating Modes
Installed location must be at least a 10' x 10' x 7' room (700 cubic feet of air space). If smaller, there must be louver installed to provide sufficient airflow.
Installed room location must not be cooler than 40°F.
Installed locations with warmer ambient air temperature (i.e. furnace room) provides abundant "free" heat and is advantageous.
The heat pump dehumidifies the air and as a result produces condensate which must be piped to drain or outdoors.
The washable air filter requires periodic cleaning. Frequency depends upon environmental conditions.
|Floor to T&P
and HW Outlet
Hubbell Heat Pump Water Heater Performance
Energy Consumption Chart
|Annual Energy Consumption (EST)|
|Ambient Air Temperature||Energy Factor (EF)||Coefficient of Performance (COP)||Annual Energy Consumption and Operating Cost in Various Operating Modes|
Recovery Rating Chart
|Continuous Recovery Rating (GPH)|
|Ambient Air Temp||Continuous Recovery Rating (GPH) in Various Operating Modes|
|60°F ΔT||70°F ΔT||80°F ΔT||60°F ΔT||70°F ΔT||80°F ΔT||60°F ΔT||70°F ΔT||80°F ΔT||60°F ΔT||70°F ΔT||80°F ΔT|
ΔT represents the °F temperature rise for hot water.
|Heating Capacity Chart (BTU/Hr)|
|Ambient Air Temp||BTU/Hr Rating in Various Operating Modes|
|Amperage Rating Chart (Amps)|
|Supply Voltage||Total Maximum AMP Draw in Various Operating Modes|
|240V||2.6||15.8||15.8 (3800 Watts)||18.4|
|220V||2.8||14.5||14.5 (3200 Watts)||17.3|
|208V||3.0||13.7||13.7 (2850 Watts)||16.7|
Variables To Solve For:BTU/Hr Requirement:
_________ GPH x _________ °F ΔT x 8.33 = _________ BTU/Hr
_________ BTU/Hr ÷ 8.33 ÷ _________ GPH = __________ °FΔT
_________ BTU/Hr ÷ 8.33 ÷ _________ °FΔT = __________ GPH
- 1 1/2" Male NPT inlet and outlet water connections
- Solid (Copper-Alloy, Type 304L, Type 316L, stainless steel) storage tank of maximum life
- Tank installed heat exchanger for use with solar or radiant heating systems
- ASME tank construction
- Alternate voltages (1 or 3 phase), alternate wattages or 50 Hz available
- Condensate removal pump (120V plug-in) to remove and lift condensate to drain
- Model PBX Brochure PDF (3.8 MB)
- Model PBX Written Spec PDF (1.1 MB)
- Model PBX Written Spec DOC (27.0 KB)
- Model PBX O&M Manual PDF (2 MB)
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