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C l i m a t e M a s t e r W a t e r- S o u r c e H e a t P u m p s
C L I M A T E M A S T E R W A T E R - S O U R C E H E A T P U M P S
Tr a n q u i l i t y
®
2 2 ( T Y ) S e r i e s
R e v. : 1 2 / 1 7 / 1 4
Ground-Water Heat Pump Applications
Flow Regulation
- Flow regulation can be accomplished
by two methods. One method of fl ow regulation involves
simply adjusting the ball valve or water control valve on
the discharge line. Measure the pressure drop through the
unit heat exchanger, and determine fl ow rate from Tables
8a through 8e. Since the pressure is constantly varying, two
pressure gauges may be needed. Adjust the valve until
the desired fl ow of 1.5 to 2 gpm per ton [2.0 to 2.6 l/m per
kW] is achieved. A second method of fl ow control requires
a fl ow control device mounted on the outlet of the water
control valve. The device is typically a brass fi tting with
an orifi ce of rubber or plastic material that is designed
to allow a specifi ed fl ow rate. On occasion, fl ow control
devices may produce velocity noise that can be reduced by
applying some back pressure from the ball valve located
on the discharge line. Slightly closing the valve will spread
the pressure drop over both devices, lessening the velocity
noise.
Note: When EWT is below 50°F [10°C], 2 gpm per
ton (2.6 l/m per kW) is required.
Water Coil Low Temperature Limit Setting
- For all
open loop systems the 30°F [-1.1°C] LT1 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.
