VDH-VAH Scholar 2.0 Heat Pumps and Air Conditioners

Models:
VAH2030-2048-2060
VDH2024-2036-2040

 

General Description

The Next Generation Scholar 2.0 VDH and VAH heat pumps and air conditioners are modular HVAC systems designed to provide heating, cooling, and outside fresh air for school classrooms. The units are installed in the classroom against an exterior wall. The vertical configuration minimizes the floor space occupied by the HVAC unit. This unique design makes it ideal for both new schools and for renovation of existing classrooms.

A full range of ventilation options – from the GreenCube® ERV, to a mechanical damper - are offered to meet any climate or budget. A wide selection of architectural louvers provides the designer with unlimited styles and configurations to compliment the exterior of the school. Marvair offers a full range of thermostats to meet virtually every requirement. The unit can be controlled by a wall mounted thermostat, an internal thermostat or interfaced with an energy management system.

Scholar 2.0 heat pumps and air conditioners are available in cooling capacities from 2 to 5 tons with a 2-stage compressor (cooling only) as standard. Electric resistance or hot water is available as primary heat on the air conditioners and as second stage heat on the heat pump. All sizes are available for operation on 208/230 V. 1Ø or 3Ø and 460 V. electrical supply. All Scholar models conform to UL/CSA standard 60335-1 and 60335-2-40 and CAN/CSA C22.2, No. 236-11 Ed.4. and listed by ETL.

 

Marvair Scholar 2.0 Classroom Unit

VDH/VAH Scholar 2.0 Classroom Unit

EER: 11.00 - 12.00

Cooling Capacities:   2, 2½, 3, 3½, 4 & 5 tons (20,000 BTUH to 60,000 BTUH)

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Exceeds DOE Efficiency Requirements

  • All Scholar 2.0 models are at least 11EER and 3.3 COP. 

Modular Construction for Ease of Installation

  • The upper module consists of a packaged air conditioner or heat pump while the lower module houses the ventilation section. These modules can be easily separated to reduce the height of the unit to fit through doors and inside elevators. This also reduces the weight that must be moved into position and eliminates the need to tilt the unit onto its side.
  • The Scholar 2.0 offers flexible installation options, including corner installs with no clearance requirement.

Quiet Operation for a Better Learning Environment

  • The Scholar 2.0 meets and exceeds ANSI/ASHRAE Noise Criteria. A high efficiency axial fan moves air silently through the condenser coils. Specially designed interior panels convert sound to heat energy, resulting in the sound being absorbed. A low vibration, scroll compressor insures quiet operation as well as energy efficiency. The indoor air mover utilizes a revolutionary electronically commutated motor (ECM). This motor consumes a minimum of power with whisper quiet operation. Throughout this Data Sheet features, options and components that minimize sound levels are designated by the “Quiet Zone” logo.

    High efficiency means lower operating costs

    • The latest in scroll compressor technology with ultra high efficiency indoor and outdoor air movers, generous lanced fin with rifled tube evaporator and condenser coils combine for Integrated Part Load Values (IPLV’s) of up to 14.5.

    Humidity Control

    • The control of humidity is essential for a positive learning environment. Scholar 2.0 heat pumps and air conditioners actively control humidity with both standard controls and several optional accessories for schools where control of humidity is an everyday concern. The electronically commutated motor optimizes moisture removal by automatically controlling the air flow across the indoor coil. Unconditioned outdoor air for ventilation is not brought directly into the classroom. Ventilation air first passes through the indoor coil to temper the air and remove moisture. It then is mixed with classroom air before being introduced into the classroom.

    2-Stage Compressor

    • Scholar 2.0 heat pumps and air conditioners come standard with a 2-stage compressor with a first stage capacity of 65% of the total capacity. The 2-stage compressor provides better comfort and improved energy efficiency compared to many older, single stage compressors.

    Scroll Compressor and Next Generation R-454B Refrigerant

    • The heart of every air conditioner or heat pump is the compressor and the Scholar 2.0 utilizes a scroll compressor specifically designed to use R-454B refrigerant with a 78% lower GWP than R-410A. The heavy duty scroll compressor is quieter and operates with less damaging vibration than older compressors that operate on R-410A.

    GreenCube® Energy Recovery Ventilator (ERV)

    • The optional GreenCube® ERV is a total energy recovery ventilator, removing both moisture and heat from the incoming air stream. With an outdoor wet bulb of 74°F and an indoor dry bulb of 72°F and 450 cfm of outside air, the GreenCube will remove 8 pints per hour of moisture from the incoming fresh air stream.
    • For optimum control of the humidity, the GreenCube® ERV should be used in conjunction with Hot Gas Reheat. This complete, factory assembled optional coil and controls economically maintains the temperature and humidity in the classroom.