FORM NO.:6U6K-B01E-NB-EN
JOHNSON CONTROLS
16
COOLING MODE
Low pressure liquid refrigerant enters the evaporator BPHE and
is evaporated and superheated by the heat energy absorbed from
the chilled liquid. Through 4-way valve, suction accumulator,
the superheated low pressure vapor enters the compressors and
HEATING MODE
Two-phase refrigerant liquid enters RTPF (round tube and plate
n) coils and fully evaporated there by absorbing the heat from
the flowing air driven by the EC fan. Through 4-way valve
and accumulator, superheated low suction vapor enters the
compressor(s). The compressors rework to compress vapor to
is compressed to high pressure. The high pressure vapor is fed
to the ambient coils and fans, via the four way reversing valve,
where heat is removed. The fully condensed and subcooled
liquid passes through the electronic expansion valve where
pressure is reduced and turned into two-phase refrigerant
mixture to make chilled water in evaporator BPHE.
higher pressure, which flow into BPHE (as a condenser) and
condensed into refrigerant liquid by rejecting the heat to the
flowing water to make hot water. The subcooled refrigerant
liquid goes through EEV and re-enters into RTPF coils (as
evaporator) to repeat the circulation.
FIGURE 2 – COOLING FLOW DIAGRAM
SECTION 2 – PRODUCT DESCRIPTION
Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz
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