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Water Source Heat Pump (Package Type E Series)

Product Introduction

Mammoth Water Source Heat Pump Units

● Eleven units from 3.0 to 19.3 kW
● Fully run tested with water
● Compact size
● CCC and CE listed
● Microprocessor-based control system including fan speed adjustment and condensate overflow protection
● Optional geothermal application


Standard Rating Data
Water loop application(boller/tower)

Ground loop application



Unit Description
Mammoth offers a complete line of high efficiency horizontal units from 3.0 kW - 19.3 kW. Five cabinet sizes with a
similar shape allow for easy layout and installation. Each unit is run-tested with water in the cooling and heating modes.
All units are listed for product safety by CCC & CE.
Unit Construction
The cabinet is constructed of G-60 galvanized steel. Internal metal parts are also fabricated from galvanized steel.
Cabinet insulation is 15mm thick, skin-coated fiberglass/PE. The entire bottom panel is insulated with the same material
to prevent condensation and reduce noise transmission. Three access panels for the compressor, fan and control box
sections allow service to all major components without removing the unit from the ceiling. The control box has its own
entrance panel to limit exposure to other sections not requiring service. All major electrical components, including
transformer, relays, contactor(s) and circuit board, are located inside the control box making it convenient to service the
unit.
A 10 mm thick reusable filter is supplied in a factory-mounted filter bracket designed to accommodate a return air duct
connection.
The units include factory-mounted hanger brackets and have four top-panel adjustable brackets with factory-mounted
grommets.
All units incorporate female water fittings outside the cabinet for connection to flexible hoses. A 19 mm O.D. condensate
connection is located outside the cabinet, adjacent to the water connections.
Refrigeration System
Refrigeration system for each circuit consists of high efficiency compressor, either rotary type or scroll type, a coaxial
water-to-refrigerant heat exchanger, an airside coil, thermal expansion valve or capillary tube, access valve, reversing valve
and safety controls.
The compressor is mounted on heavy - gauge mounting rails to dampen compressor vibration. In addition, the compressor
is also mounted on neoprene isolators. This dual isolation ensures minimal noise transmission and quiet operation. Each
refrigeration circuit has high and low side access valves for servicing.
The water-to-refrigeration coaxial coil consists of an inner twisty tube and a steel outer tube.
Large tube diameters prevent clogging, unlike brazed type heat exchangers which require mesh strainers. The air coil is a
copper-tube,aluminum finned selected for high efficiency.
The reversing valve is energized in the heating mode and is fail-safe to the cooling mode.
Safety controls include high and low (loss of charge protection) refrigeration pressure switches for each circuit. A lockout
relay prevents the compressor from operating if any of the safeties trip.
Fan Section

The fan section consists of the fan wheel/housing assembly, fan motor and drain pan. Airside components are separated from
the compressor section to limit noise transmission from the compressor. The drain pan extends past the coil into

 the compressorsection for easy cleaning. It is insulated from the unitcasing to prevent sweating.

All units are capable of having two different discharge
air arrangements: straight or end, both can be factorysupplied in either configuration or simply converted from one to the other in the field. Mirror image units allow a "reversed" configuration. All units have a directdrive fan assembly. The fan motor is a multispeed, with internal overload protection. With a maximum speed of 1200 rpm,the fan is quieter than the smaller of diameter motors used in similar products. Each centrifugal fan wheel is

balanced for minimum vibration.

Electrical and Control Box
● Fan speed control
Fan speed control is a standard feature with the microprocessor control system. It permits motor operate with
High/Medial/Low speed to meet different requirement
● Safety lockout
Safety lockout prevents compressor operation if any of the safety switches trip: high pressure switch, low pressure switch
or optional freezestat. The unit can be reset from the thermostat or from the main unit disconnect.
● High and low voltage protection
High and low voltage protection shuts off the unit in the event the unit voltage is too high or too low to protect the internal
components from damage.
● Low pressure switch bypass
Low pressure switch bypass ignores the low pressure input signal for 120 seconds each time the compressor starts to
eliminate nuisance trip and to allow the suction pressure to build at startup.
● Condensate overflow protection
Condensate overflow protection stops compressor operation if the drain pan sensor detects moisture at the top of the pan
to prevent overflow due to clogged or slow draining condensate piping.
● Others: Refrigerant leakage protection , Frost-protection,Water temperature protection, Coil Frost-protection,High
discharge temperature protection,Water flow switch(Optional),Fire-alarm,LCD error code display, Water pump
interlock,Timer-power-on/off , Economy operation mode etc .
The control box houses all the electrical components with its own access panel. Controls include a transformer, printedcircuit
board, compressor contactor, fan relay and a capacitor(s).
Mammoth offers a microprocessor - based unit controller and includes features such as:
Factory-mounted Options

Mammoth water source heat pumps offer numerous factory-installed options that can help minimize field labor and
enhance system performance.

● Cooling-only
Units are available for those applications requiring no heating from the unit.
● An extended-range package
An extended-range package is available on all heat pump units to allow heating operation down to -5℃ entering water
temperature. The package includes thermal expansion valve, an insulated coaxial heat exchanger and insulated
refrigerant piping.
● 25/50 mm filter

Field-mounted Options

● Water flow switch
Water flow switch will shut off the unit when the water flow is smaller than limit value to protect the system.
● Flexible hose kits
Flexible hose kits are available in, 3/4-inch and 1-inch diameters, 600mm and 900mm long. Each hose is constructed of
braided stainless steel and has steel fittings with a swivel at one end. Hoses are rated at minimum 1000 kPa.