CALEFFI DISCAL 551706A Installation, Commissioning And Servicing Instructions - Page 9
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Installation
DISCAL units may be used in heating or cooling systems to ensure the progressive removal of
air which is continuously formed. The units should preferably be installed after the boiler and on
the pump suction side, as these are the points where the formation of micro-bubbles is greatest.
DISCAL air separators for horizontal pipes must be installed vertically. Flow direction of the DISCAL
air separator is bidirectional (flow in either direction is permitted), except for the 5517 series rotating
collar version. For the 5517 series, the correct flow direction is shown by an arrow on the T-fitting.
Turn the T-fitting by hand to correctly orient it to install in either horizontal or vertical piping. In
installation conditions where inspection is not possible, it is recommended that the venting valve
cap is replaced by a Caleffi Code R59681 hygroscopic safety vent. The standard replacement cap
code is 59119.
CHILLER
BI-DIRECTIONAL
max
T
250 F
max
P
150 psi
BI-DIRECTIONAL
max
T
250 F
T
max
220 F
max
P
150 psi
P
max
150 psi
BI-DIRECTIONAL
T
max
250 F
T
max
220 F
P
150 psi
P
150 psi
max
max
T
max
220 F
P
max
150 psi
38466.01
38466.01
BI-DIRECTIONAL
max
T
250 F
max
T
220 F
P
150 psi
P
150 psi
max
max
38466.01
9
38466.01