Holdover refrigeration systems are
used when continuous power is not available to run your
refrigerator . A holdover system allows a boater to run the
equipment for a couple of hours a day and enjoy continuous cold
box temperatures for up to 24 hours. Grunert Holdover
Plates feature a true eutectic solution, which guarantees a
stable temperature during this holdover period. Grunert is the
only manufacturer that offers standard holdover plates in four
temperatures: 0°, -9°, and -18° for freezer applications and
26°. A wide variety of sizes are available to accommodate
various box designs.
Designers are invited to consult
the Marine Air Systems Customer Support Team for assistance in
planning a vessel with high quality, exceptionally reliable and
Flat Evaporator Plates:
When continuous power is available,
Grunert evaporator plates provide the solution for your cockpit
freezers, drink boxes and any other custom refrigeration
plates are very cost effective and are available in a wide
variety of custom sizes to accommodate various box designs.
DC Voltage/Hermetic Models:
Mate models are offered in air, water or air/water cooled
condensers for maximum versatility. Air cooled units offer
standard efficiencies. Water cooled units provide increased
efficiencies and superior operation in high ambient
temperatures. Two sizes of evaporators can be configured for
custom applications. Because of the Polar Mate's small size it
can easily be applied to the smallest of applications.
The standard Grunert Baysider
model features an enclosed ductable air cooled condenser as well
as a water cooled condenser for maximum versatility. Warm
condenser air can be ducted away from the unit and discharged
into a more desirable area.
DC Voltage/Belt Driven
models are available in 1/3 HP - 1HP capacities, for use with
12, 24, or 32 volt DC power supplies. The extensive Mariner
series can efficiently cool a number of different box sizes and
configurations. For maximum versatility, add an optional air
cooled condenser to provide uninterrupted serviced when the
vessel is hauled or unattended.
AC Voltage/Hermetic Models:
Like the Mariner series , the AC
Hermetic models cool a number of different box sizes and
configurations. Grunert Docksider
models are available in 115V in 1/4 HP. Passage
maker models are available in 115V or 230V in 1/4, 1/2, 1/5,
3/4 HP and 230V only in 1,1 1/2, and 2 HP. Both models are
designed for yachts with AC power sources on board and utilize
ozone friendly refrigerant 404A.
Engine Drive/Belt Driven
models are designed for those yachts that utilize the power
available from their main engine for holdover type systems.
Typically, all on board energy requirements are condensed into
one or two engine run times per 24 hour period.
Contained | Central
Systems | Manuals
Water | Refrigeration