Specifications

Manual 2100-317
Page 24
FIGURE 12
LAKE OR POND INSTALLATION
D. Size the pump to provide necessary GPM for the
ground water heat pump. A 12 GPM or greater water
flow rate is required on all modes when used on this
type system.
E. A pressure tank should be installed in dwelling to be
heated adjacent to the ground water heat pump. A
pressure switch should be installed at the tank for
pump control.
F. All plumbing should be carefully sized to compensate
for friction losses, etc., particularly if the pond or lake
is over 200 feet from the dwelling to be heated or
cooled.
G. Keep all water lines below low water level and below
the frost line.
H. Most installers use 4 inch filed tile (rigid plastic or
corrugated) for water return to the lake or pond.
I. The drain line discharge should be located at least
100 feet from the dry well location.
J. The drain line should be installed with a slope of 2
inches per 10 feet of run to provide complete
drainage of the line when the ground water heat pump
is not operating. This gradient should also help
prevent freezing of the discharge where the pipe
terminates above the frost line.
K. Locate the discharge high enough above high water
level so the water will not back up and freeze inside
the drain pipe.
L. Where the local conditions prevent the use of a
gravity drainage system to a lake or pond, you can
instead run standard plastic piping out into the pond
below the frost and low water level.
For complete information on water well systems and lake
and pond applications, refer to Manual 2100-078
available from your distributor.
WARNING
Thin ice may result in the vicinity of the
discharge line.
WALL CAP
ELECTRICAL LINE
PITLESS ADAPTER
WATER SUPPLY
LINE
DROP
PIPE
GRAVEL FILL
WATER LEVEL
PERFORATED
PLASTIC CASING
SUBMERSIBLE
PUMP
12’
to
15’
LAKE
or
POND
TO PRESSURE
TANK
15’ to 20’
DEEP
MIS-1607