15
FORM CIM 0203
Water Regulating Valve
Each system is equipped with a factory installed water
regulating valve. This valve is pressure operated; it
opens the circuit only when water is needed. The
valves are set to open at 235 PSI head pressure. If it
becomes necessary to change the factory adjustment,
use a wrench to turn the adjusting screw on top of
the spring housing. Counter-clockwise increases
pressure, clockwise decreases. See Figure 16. Water
source heat pumps incorporate a bypass circuit
around the water regulating valve. This circuit is
used in the heat mode.
Water Piping and Connections
Do not reduce the unit pipe sizes from the factory
connections on the unit. Both the water inlet and
outlet of the condensing package should be
equipped with hand valves. This is needed for shut-
down of water supply during long periods of unit
shutdown and/or condenser removal, if required.
The condensate drain line should not be con-
nected to the condenser outlet, as flooding is
likely to occur. Provisions should be made for
ease of piping cleaning by using plugged tees
at all turns, rather than ordinary elbows.
Hook Up
Each system requires 3 gallons of water per ton per
minute. Braze in your pipe water lines to the water
valve(s). For future reference when cleaning is needed,
record details on temperatures entering and leaving
the heat exchanger and the pressure drop as a new
installation. See “Cleaning The Water Cooled Con-
denser” on page 16.
Water Connection
Install and connect a fresh water strainer (not sup-
plied) to the water in supply. Strainer should be
readily accessible for periodic cleaning. Shut-off
valves on both strainer inlet and outlet are recom-
mended to facilitate cleaning.
CAUTION: High Temperature Fresh Water –
unusually high water temperature (above
95°F) or marginal water pressure at the con-
denser water inlet may result in nuisance trip-
ping of the high pressure switch.
WARNING: Water cooled units are for use with
fresh water application only. Do not use for brack-
ish water or salt water unless appropriate con-
denser has been installed as an option.
NOTE: On water source heat pumps, a
crankcase pressure regulating valve is incor-
porated into the refrigerant circuit. This is
to help protect the compressor should the in-
coming water temperature be too high.
CONDENSATE DRAIN CONNECTION
Units are equipped with two 3/4" IPS drains; one for
the evaporator condensate (Item , Figure 6, page
Figure 17:
Condensate Trap Installation
0009CA
"A"
2-1/2"
UNIT
Summary of Contents for 4CA1901
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