W2W Series Heat Pump
Ecologix Heating Technologies Inc
Page
7
www.ecologix.ca
221 Holiday Inn Drive Cambridge ON
ph: 519-658-4330
Applications
COMMERCIAL WATER –LOOP HEAT PUMP APPLICATIONS
Commercial systems typically include a number
of units plumbed 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. In piping systems
expected to utilize water temperatures below
50ºF [10ºC], ½” closed cell insulation is required
on all piping surfaces to eliminate condensation.
Metal to plastic threaded joints should never be
employed due to their tendency to leak over
time. All non-distributor class units include a
low temperature-soldered bracket-supported FTP
water connection. Teflon 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 in different
configurations for connection between the
W2W-Series and the piping system. Hose kits
can include shut off valves; P/T plugs for
performance measurement, high-pressure
stainless steel braid hose, “Y” type strainer with
blow-down valve, or “J” type swivel connection.
Balancing valves to facilitate the balancing of the
system, or an external low pressure drop
solenoid valve for use in variable speed pumping
systems, may also be incorporated into the
design of a system and supplied with the
equipment.
The piping system should be flushed to remove
dirt, piping chips and other foreign material prior
to operation. See Piping System Cleaning and
Flushing Procedures. The flow rate is usually set
between 2.25 and 3gpm per ton of cooling
capacity. The manufacturer recommends 2.5gpm
per ton for most applications of water loop heat
pumps. To ensure proper maintenance and
servicing, P/T ports are imperative for
temperature and flow verification, as well as
performance checks.
Cooling Tower/Boiler Systems typically utilize a
common loop maintained at 60-90ºF [15.6-
32.2ºC]. The use of a closed circuit evaporative
cooling tower with a secondary heat exchanger
between the tower and the water loop in
recommended. If an open-type cooling tower is
used continuously, chemical treatment and
filtering will be necessary.