MB Series Large Geothermal WSHP 6-25 Tons, 208/230V, 460V & 575V 3 Phase

The (MB) Compact High-Capacity Series raises the bar for water-source heat pump efficiencies, features and application flexibility. Not only does the MB Series exceed ASHRAE 90.1 efficiencies, but it also uses R-454B low Global Warming Potential (GWP) refrigerant, making it an extremely environmentally friendly space conditioning product solution. 
MB is eligible for additional LEED® (Leadership in Energy and Environmental Design) points due to its innovative and environmentally conscious design. 
With one of the smallest cabinets in the industry, the  MB easily fits into tight spaces including standard doorways. 
Designed to be backward compatible with older water-source heat pumps, the MB heat pump is packed full of the innovation you have come to expect from the experts at MARS
Available in sizes 6 tons (21.1 kW) through 25 tons (87.9 kW) with multiple cabinet configurations, the  MB offers a wide range of units designed for most applications. 
The MB has an extended range refrigerant circuit, capable of ground loop (geothermal) applications (may require optional extended range insulation), ground-water (geothermal) applications, as well as water loop (boiler-tower) applications. 
Microprocessor controls, galvanized-steel cabinet, galvanized-steel with epoxy powder-coated drain pan and TXV refrigerant-metering device are just some of the features of the flexible MB. Series.
Recent EPA mandates require an industry transition to low-GWP refrigerants, such as R-454B which is a gas that is classified as having low-toxicity, low flammability rating. 
Due to these characteristics, R-454B systems charged with over 62 ounces of refrigerant must contain an integrated Refrigerant Detection System (RDS). In the unlikely event of a system-refrigerant leak, the RDS shuts down compressor operation and runs the unit blower motor to disperse any concentration of leaked refrigerant in compliance with UL 60335-2-40 safety standards.

Options such as a coated air coil, DDC controls, and dual-point power allow customized design solutions. Optional variable-frequency blower motor controls or blower-motor/sheave-drive packages expand the operating range and help overcome some of the challenges associated with ductwork for retrofit installations. 
A sound absorbing Sound Attenuation package makes a  great unit even better.
Intelligent communicating controls provide technicians an interface into the operation of the system in real time without the need for hard tooling. 
On-board advanced controls communicate the key operating system temperatures enabling technicians to startup, commission, and service the equipment via handheld service tool. 
Communicating controls also enable system adjustments and capture operating conditions at time of fault. All this information is displayed in an easy-to-read format maximizing the usability of the experience.
Waterside Economizers (WSE) take advantage of  cool loop-water temperatures and can provide for free cooling. In shoulder seasons, lower building loop temperatures can be leveraged when there is cooling demand by adding a factory installed hydronic coil. 
The WSE option meets IECC section C403.3.1 and is a requirement in many states.
The MB Series water-source heat pumps are designed to meet the challenges of today’s HVAC demands with one of the most innovative products available on the market

FEATURES
Horizontal sizes 072 (6 Tons, 21.1 kW) through 120 (10 Tons, 35.2 kW)
Vertical sizes 072 (6 Tons, 21.1 kW) through 300 (25 Tons, 87.9 kW)
Environmentally friendly R-454B low-GWP refrigerant
Refrigerant Detection System (RDS) (required for all sizes)
Horizontal configurations with left or right return air and straight or back supply-air discharge. 
Discharge is field convertible. 
Field conversion uses all existing parts, including panels and belts
Vertical configurations with front or back return and top, front, or back discharge. 
Fan discharge on vertical unit sizes 072-120 is field convertible. 
Field conversion uses all existing parts, including panels and belts
Electric power entry points from either side of the front
Configurable water connections for left or right handling on horizontal units
Dual refrigeration circuits (all sizes)
Exceeds ASHRAE 90.1 efficiencies
Galvanized-steel cabinet construction
Insulated divider and separate compressor/ air-handler compartments
TXV metering device 
Standard hanger brackets for horizontal units
Premium-duty motor that is VFD compatible
CXM2 Communicating Controls:– Connect directly to the system with a handheld service tool– Provides real-time unit operating conditions– Reduces startup, commissioning, and service time by providing key system temperatures electronically– Captures operating conditions in the event of a safety shutdown

OPTIONS
Variable Frequency Drive (VFD) fan-motor controls (single-zone VAV compatible)
Blower motor/sheave drive packages
BACnet, Modbus, and Johnson Controls N2 compatibility options for Building Management Systems (BMS)
Sound-absorbing Sound Attenuation package
Coated air coil
Dual-point power
Waterside Economizer (WSE): requires the standard CXM2 and heat-pump thermostat with two-stage cooling
Extended-range insulation for geothermal applications
Factory-configurable water connections for left or right handling on vertical units
Motorized and modulating water valves for ultimate part-load operation (Vertical units)

ACCESSORIES
Wide variety of thermostat options to meet your application needs
Braided-hose kits in various lengths with optional water valve, PT plugs, blowdown valve, flow regulator, and strainer 
Externally mounted manual and motorized  water valves
1-inch Merv8 filter
2-inch Merv8 or 13 filters
Aesthetically pleasing wall sensors for connection to BMS (MPC) control