Dirt Trap - Bosch CS 3000 AWP Installations- Und Bedienungsanleitung

Water systems and pipework
Anti-freeze solutions
Have in consideration that the use of an anti-freeze solution determines
an increase in a pressure drop.
Make sure that the glycol type used is inhibited (not corrosive) and
compatible with the hydraulic circuit components.
Do not use different glycol mixture (i.e. ethylic with propylene).
Be aware that most of the glycol types are corrosive under 20%. Mix the
water glycol mix proper before filling it in the system, otherwise the unit
can be damaged.
% Ethylene
Freezing temperature (ºC)
Safety temperature (ºC)
Table 41 Typical values for ethylen glycol (other glycol type values can be different).
The correction factors shown refer to water and ethylene glycol mixes,
used to prevent the formation of frost on the exchangers in the water
circuit during inactivity, in winter.
5.3

Dirt trap

• The water filter must be installed immediately in the water inlet of the
unit, in a position that it will be easily accessible for cleaning;
• Removing the filter will end the guaranty.
The filter must have an adequate mesh to prevent the entry of particles
grater that 0,5mm (30 mesh).
Fig. 68
Water flow-rate
The design water flow-rate must be:
• inside the exchanger operating limits (see the Technical data
chapter);
• guaranteed also with variable system conditions (for example, in
systems where some circuits are bypassed in particular situations).
If the system capacity is below the minimum flow, bypass the system as
indicated in the following diagram.
UNIT
Fig. 69
52
5% 10% 15%
-2 -3.9 -6.5
3 1 -1
0010045068-001
Recirculation
0010044566-001
%Ethylene glycol by
weight
Correction factor for
unit cooling capacity
Correction factor for
flow rate
Correction factor for
system pressure drop
Table 40 Correction factors for glycol use
20% 25% 30%
-8.9 -11.8 -15.6
-4 -6 -10
If the system capacity exceeds the maximum flow, bypass the system as
indicated in the diagram below.
UNIT
Fig. 70
Non-return valve
Provide non-return valves (A) for the installation in the case of several
units connected in parallel.
Fig. 71 Non-return valve
0% 20% 30% 35%
1 0,973 0,965 0,963
1 1,051 1,092 1,119 1,145 1,2
1 1,268 1,482 1,6365 1,791 2,1
35% 40% 45%
-19.0 -23.4 -27.8
-14 -19 -23.8
Recirculation
0010044567-001
A
0010044568-001
CS3000 AWP – 6721852570 (2022/11)
40% 50%
0,96 0,95
50%
-32.7
-29.4