Tranquility
®
22 (TY) Series
R e v. : J u l y 8 , 2 0 2 1
C l i m a t e M a s t e r Wa t e r-S o u rc e H e a t P u m p s
18
C L I M AT E M A S T E R WAT E R - S O U R C E H E AT P U M P S
Ground-Water Heat Pump Applications, Cont’d.
Flow Regulation -
Flow regulation can be accomplished
by two methods. One method of flow 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 flow rate from Tables
8a through 8e. Since the pressure is constantly varying,
two pressure gauges may be needed. Adjust the valve
until the desired flow of 1.5 to 2 gpm per ton [2.0 to 2.6
l/m per kW] is achieved. A second method of flow control
requires a flow control device mounted on the outlet of the
water control valve. The device is typically a brass fitting
with an orifice of rubber or plastic material that is designed
to allow a specified flow rate. On occasion, flow 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.
