CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Tranquility
®
20 (TS) Series
Rev.: June 5, 2020
ClimateMaster Water-Source Heat Pumps
14
Water-Loop Heat Pump Applications
Commercial Water Loop Applications
Commercial systems typically include a number of units
connected to a common piping system. Any unit plumbing
maintenance work can introduce air into the piping system;
therefore air elimination equipment is a major portion of the
mechanical room plumbing. Consideration should be given
to insulating the piping surfaces to avoid condensation.
ClimateMaster recommends unit insulation any time the
water temperature is expected to be below 60ºF (15.6ºC).
Metal to plastic threaded joints should never be used due to
their tendency to leak over time.
Teon
®
tape thread sealant is recommended to minimize
internal fouling of the heat exchanger. Do not over tighten
connections and route piping so as not to interfere with
service or maintenance access. Hose kits are available
from ClimateMaster in different congurations as shown in
Figure 12 for connection between the unit and the piping
system. Depending upon selection, hose kits may include
shut off valves, P/T plugs for performance measurement,
high pressure stainless steel braided hose, “Y” type strainer
with blow down valve, and/or “J” type swivel connection.
Balancing valves and an external low pressure drop solenoid
valve for use in variable speed pumping systems may also be
included in the hose kit.
The piping system should be ushed to remove dirt, piping
chips, and other foreign material prior to operation (see
“Piping System Cleaning and Flushing Procedures” in this
manual). The ow rate is usually set between 2.25 and 3.5
gpm per ton [2.9 and 4.5 l/m per kW] of cooling capacity.
ClimateMaster recommends 3 gpm per ton [3.9 l/m per kW]
for most applications of water loop heat pumps. To ensure
proper maintenance and servicing, P/T ports are imperative
for temperature and ow verication, as well as performance
checks.
Water loop heat pump (cooling tower/boiler) systems
typically utilize a common loop, maintained between
60 - 90°F [16 - 32°C]. The use of a closed circuit evaporative
cooling tower with a secondary heat exchanger between the
tower and the water loop is recommended. If an open type
cooling tower is used continuously, chemical treatment and
ltering will be necessary.
Figure 12: Typical Water-Loop Application
3/8" [10mm] threaded rods
(by others)
Low Water Temperature Cutout Setting - CXM Control
When antifreeze is selected, the LT1 jumper (JW3) should
be clipped to select the low temperature (antifreeze 10.0°F
[-12.2°C]) setpoint and avoid nuisance faults (see “Low
Water Temperature Cutout Selection” in this manual). Note:
Low water temperature operation requires extended
range equipment.
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