Bedienungs- und Installationsanleitung
Installation- and Operation Instruction
Kühl- / Filteraggregat / Off-Line Filter / Cooler Unit
FGSL
BX270001, 10/2010 Art. Nr.90 31 065
19
3.3 Hydraulic
Connections
Connect the FGSL as shown below. The hydraulic connections between cooler and system should be
stress and vibration free. The use of flexible hoses is highly recommended.
A
B
F
0
00
612
A: Oil inlet (pump)
B: Oil outlet (cooling matrix)
If the hydraulic system is equipped with shut-off valves we recommend installing a pressure relief valve to
protect the cooler from pressure peaks.
No
pressure relief valve is supplied in the standard version.
The suction hose from reservoir to cooler should be as short as possible and must provide sufficient
diameter (see 3.3.1).
We recommend installing the cooler at the same height as the liquid level. If not possible, the cooler should
be installed below the liquid level. If the cooler can be installed above the level only, the pump produces a
regular suction pressure of 0.4 bar (5.8 psi). Depending on oil viscosity and oil temperature this allows a
varying suction height. As a rule, a level difference of 2 m (6.5 ft.) can be taken into account.
3.3.1 Calculating Operating Viscosity
Using formula
2
95
,
T
b
e
a
+
∗
=
υ
you can calculate the operating viscosity
υ
at operation temperature T in the temperature range from 10 –
100 °C (50 – 212 °F) for VG oils with an accuracy of
±
5%. Coefficients a and b are defined as:
23
,
0
V
Ln
159
b
40
∗
=
877
23
,
0
b
e
a
−
∗
=
V
40
= oil viscosity at 40°C in mm²/s
for oil VG 46
T
= temperature in °C
υ
= operating viscosity in mm²/s
Summary of Contents for FGSL 15
Page 33: ......
