19
T H E S M A R T S O L U T I O N F O R E N E R G Y E F F I C I E N C Y
C o n s o l e s
R e v. : 5 N o v. , 2 0 0 9 B
c l i m a t e m a s t e r. c o m
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.
Ground-Loop Heat Pump Applications
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 235
psig and a cut-in pressure of 190 psig. This pressure switch
can be ordered from ClimateMaster with a 1/4” internal
fl
are
connection as part number 39B0005N01.
NOTICE!
Ground-water applications for commercial
buildings with more than 2-3 units should include a plate
frame heat-exchanger to isolate the heat pumps from the
ground-water and con
fi
ne heat exchanger cleanings to one
location and lessen maintenance. Direct use of ground-water
may increase the frequency of heat pump maintenance and
may shorten life expectancy.
