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4.5.2 Kit pump option
The optional pump kit can be provided with an autorefill system that can be forbidden in some countries; all installations
must be carried out in compliance with local laws and regulations.
Fig. 26– Hydraulic diagram (opt. 78-79-80-81)
Table 12– Legend hydraulic diagram
a
Single Pump
m
Plugged fitting
c
Twin pump
o
Flow switch fitting ½ ”G or 1”G
d
Valve
p
Automatic filling valve fitting
e
Check Valve
q
Plugged fitting
f
Safety Valve
r
Water filter
g
Plugged fitting
TT
Temperature sensor
h
Air vent
TS
Temperature switch
i
drain
PI
Pressure gauge
k
Electrical heater
FS
Flowswitch
l
Check valve
n
Check Valve
4.5.3 Flow switch option installation
To ensure sufficient water flow through the evaporator, it is necessary to install a flowswitch on water circuit. The flow
switch can be installed either on the inlet or outlet water piping. The purpose of the flow switch is to stop the unit in case
of water flow interruption, thus protecting the evaporator from freezing.
The manufacturer offers, as optional, a flow switch that has been selected for this purpose.
This paddle-type flow switch is suitable for heavy-duty outdoor applications (IP67) and pipe diameters from 1” to 8”.
The flow switch is provided with a clean contact which must be electrically connected to terminals shown in the wiring
diagram. The flow switch must be set up to intervene when the water flow of the evaporator reaches 50% of the nominal
value.
4.5.4 Heat recovery option
Units may be optionally equipped with heat recovery system.
This system in made by a water cooled heat exchanger located on the compressors discharge pipe and a dedicated
management of condensing pressure.
To guarantee compressor operation within its envelope, units with heat recovery cannot operate with water temperature
of the heat recovery water lower than 28°C.
It is a responsibility of plant designer and chiller installer to guarantee the respect of this value (e.g. using recirculating
bypass valve).
4.6 Water treatment
Before starting unit operation, clean the water circuit.
The evaporator must not be exposed to flushing velocities or debris released during flushing. It is recommended that a
suitable sized bypass and valve arrangement is installed to allow flushing of the piping system. The bypass can be used
during maintenance to isolate the heat exchanger without disrupting flow to other units.
For some unit models, it may happen that pump kit is installed on an external skid, connected to the
main frame, resulting in an unit longer than the standard one. Always refer to the dimensional
drawings for detailed measures for each model.
Bekijk gratis de handleiding van Daikin EWFD495TZSSD1, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Daikin |
| Model | EWFD495TZSSD1 |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 11779 MB |
