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 8: 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
ѥ
CAUTION!
ѥ
ѥ
CAUTION!
ѥ
R e s i d e n t i a l S p l i t U n i t s - 6 0 H z P u r o n
®
R e v. : 6 D e c . , 2 0 1 1
16
CAUTION!
Many units are installed with a factory or
¿
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
¿
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
¿
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 with a 1/4”
internal
À
are connection as part number 39B0005N02.
CAUTION! Refrigerant pressure activated water regulating
valves should never be used with the equipment.
