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TVP Manual (full) March 2007 CE rev 03.doc
4.42 Operation temperatures and pressures
The following table gives the typical values, which maybe experienced during the operation of
a TVP. It is important to appreciate that the values are influenced strongly by the operational
mode and the amount of heat being pumped by the unit. The supply water temperature also
has a profound impact when the system is in standby for long periods or where it is operating
close to its maximum duty.
Caution
A system operating outside of its design parameters may be harbouring a quiescent system
malfunction.
Parameter Description Acceptable (normal) range
SP start up * Suction Pressure 20 to 120 psi
DP start up * Discharge pressure 100 to 420 psi
SP unit running 7 to 60 psi
SP & DP system off System balance pressure 235 to 260 psi
CT Coldest temperature -100 to –170
o
C
WT Water temperature 35
o
C default 20 - 40
o
C optional
CI Coil in temp +90
o
C to –150
o
C
CO Coil out temp +40
o
C to –150
o
C
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