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R e s i d e n t i a l S p l i t - 6 0 H z R 2 2 & R 4 1 0 A
R e v. : 5 J u n e , 2 0 0 8
C a r r i e r : Tu r n t o t h e E x p e r t s
Water Coil Low Temperature Limit Setting
For all open loop systems the 30°F [-1.1°C] FP1 setting
(factory setting-water) should be used to avoid freeze damage
to the unit. See “Low Water Temperature Cutout Selection” in
this manual for details on the low limit setting.
Figure 9: Water Well Connections
Ground-Water Heat Pump Applications
Pressure
Tank
Shut-Off
Valve
Boiler
Drains
Flow
Regulator
Water In
Water Out
Water
Control
Valve
Optional
Filter
P/T Plugs
CAUTION!
CAUTION!
Refrigerant pressure activated water regulating
valves should never be used with Carrier Geothermal
equipment.
CAUTION!
CAUTION!
Many units installed with a factory or
fi
eld
supplied manual or electric shut-off valve.
DAMAGE WILL
OCCUR
if shut-off valve is
closed
during unit operation. A
high pressure switch must be installed on the heat pump
side of any
fi
eld provided shut-off valves and connected to
the heat pump controls in series with the built-in refrigerant
circuit high pressure switch to disable compressor operation
if water pressure exceeds pressure switch setting. The
fi
eld
installed high pressure switch shall have a cut-out pressure
of 300 psig and a cut-in pressure of 250 psig. This pressure
switch can be ordered from Carrier Geothermal with a 1/4”
internal
fl
are connection as part number 39B0005N02.