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The Quality Leader in Conditioning Air
Residential Split - 60Hz R22 &R410A
Rev.: 5 June, 2008
www.heatcontoller.com
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
x CAUTION! x
CAUTION! Many units installed with a factory or field 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 field
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 field installed
high pressure switch shall have a cut-out pressure of 235 psig
and a cut-in pressure of 190 psig. This pressure switch can
be ordered from HCI with a 1/4” internal flare connection as
part number 39B0005N01.
x CAUTION! x
CAUTION! Refrigerant pressure activated water regulating
valves should never be used with HCI equipment.