10
4 - WATER CONNECTIONS
CONNECTION SOURCE SIDE
The plumbing assembly for systems with disposable water
(from well or groundwater) includes in addition to 1, 2 and 3
standard components :
1
2-way motorised modulating valve at the exchanger
outlet (the operation is linked to that of the
refrigeration circuit:modulating the valve opening by 0-
10V signal the water content is reduced and the unit
operation values are maintained within the limits
allowed)
2
manually activated three-way valve for loop wash by-
pass (to allow washing of the pipes of the system and
protect the heat exchanger against fouling);
In summer operation, the device, complete with modulating
valve, makes it possible to maximize the thermal differential
of the water and hence to reduce the water flow rate.
In winter operation, modulation of the water flow rate allows
the unit to function with the water loop at high temperature. An
additional advantage of using this device is the extension of
the operating limits of the unit in summer and winter.
4.7 STANDARD UNIT
4.8 PLUMBING ASSEMBLY
FOR LOOP WITH CONSTANT
4.9 PLUMBING ASSEMBLY
FOR LOOP WITH VARIABLE
4.10 PLUMBING ASSEMBLY
FOR LOOP WITH DISPOSABLE WATER
The plumbing assembly for the constant flow rate loop inclu-
des, in addition to 1, 2 and 3 standard components :
4
two-way motorize ON/OFF
valve, operation is linked
to that of the refrigeration circuit: with the compressor
off the valve stays closed and as a result less water is
used
5
manually activated three-way valve for loop wash by-
pass (to allow washing of the pipes of the system and
protect the heat exchanger against fouling);
The standard unit is equipped with the following components:
1. plate heat exchanger complete with water side differential
pressure switch and a water temperature control probe
2. drain
bibcock
3. bleed
bibcock
T
PD
2
3
1
The plumbing assembly for the constant flow rate loop
includes, in addition to 1, 2 and 3 standard components :
4
two-way manually activated valves to make it possible
to disconnect the unit from the plumbing system for
maintenance.
5
manually activated three-way valve for loop wash by-
pass (to allow washing of the pipes of the system and
protect the heat exchanger against fouling);
T
PD
2
4
5
3
1
T
PD
2
4
5
3
1
MAX. WORKING PRESSURE
•
Standard unit =
700 kPa
•
With ON/OFF valves =
700 kPa
•
With manual valves =
700 kPa
•
With modulating valve =
300 kPa
Aries effects and air bubbles can produce the overcoming and
cause water drops.