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Daikin EWAD-TZSLB [12/20] D eimac00907 16en 12 20
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D–EIMAC00907–16EN - 12/20
Evaporator and recovery exchangers anti-freeze
protection
All evaporators are supplied with a thermostatically controlled
anti-freeze electrical resistance, which provides adequate anti-
freeze protection at temperatures as low as –25°C.
However, unless the heat exchangers are completely empty
and cleaned with anti-freeze solution, additional methods
should also be used against freezing.
Two or more of below protection methods should be
considered when designing the system as a whole:
Continuous water flow circulation inside piping and
exchangers
Addition of an appropriate amount of glycol inside the
water circuit
Additional heat insulation and heating of exposed piping
Emptying and cleaning of the heat exchanger during the
winter season
It is the responsibility of the installer and/or of local
maintenance personnel to ensure that described anti-freeze
methods are used. Make sure that appropriate anti-freeze
protection is maintained at all times. Failing to follow the
instructions above could result in unit damage. Damage
caused by freezing is not covered by the warranty.
Installing the flow switch
To ensure sufficient water flow through the evaporator, it is
essential that a flow switch be installed on the 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 the event of interrupted water flow, 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 in the range of 1” to 6”.
The flow switch is provided with a clean contact which must be
electrically connected to terminals shown in the wiring
diagram.
Flow switch has to be tune to intervene when the evaporator
water flow is lower than 50% of nominal flow rate.
Heat recovery
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)
Figure 6 - Water piping connection for evaporator
1. Pressure Gauge
2. Flexible connector
3. Flow switch
4. Temperature probe
5. Isolation Valve
6. Pump
7. Filter
Figure 7 - Water piping connection for heat recovery exchangers
1. Pressure Gauge
2. Flexible connector
3. Temperature probe
4. Isolation Valve
5. Pump
6. Filter
Содержание
- Air cooled chiller with inverter driven screw compressor 1
- Ewad tz 1
- Inverter 1
- D eimac00907 16en 4 20 4
- Legend 4
- D eimac00907 16en 5 20 5
- Description 5
- General information 5
- Operating limits 5
- Receiving the unit 5
- D eimac00907 16en 7 20 7
- Figure 2 lifting 7
- The drawing shows only the 6 fans version for the 4 fans version the lifting mode is the same 7
- Unit with 4 lifting points 7
- D eimac00907 16en 8 20 8
- Figure 3 unit levelling 8
- The drawing shows only the 12 fans version the lifting mode is the same for the different number of fans 8
- Unit with 6 lifting points 8
- D eimac00907 16en 9 20 9
- Figure 4 minimum clearance requirements 9
- D eimac00907 16en 10 20 10
- Figure 5 multiple chiller installation 10
- D eimac00907 16en 11 20 11
- Table 1 acceptable water quality limits 11
- D eimac00907 16en 12 20 12
- Figure 6 water piping connection for evaporator 12
- Figure 7 water piping connection for heat recovery exchangers 12
- D eimac00907 16en 13 20 13
- Electrical installation 13
- Maintenance 13
- Operation 13
- Table 2 standard routine maintenance plan 13
- D eimac00907 16en 14 20 14
- Table 3 routine maintenance plan for critical application and or highly aggressive environment 14
- D eimac00907 16en 15 20 15
- Service and limited warranty 15
- D eimac00907 16en 16 20 16
- Important information regarding the refrigerant used 16
- Periodic obligatory checks and starting up of appliances under pressure 16
- D eimac00907 16en 17 20 17
- D eimac00907 16en 18 20 18
- D eimac00907 16en 19 20 19
- D eimac00907 16en 20 20 20
- Daikin applied europe s p a 20
- Via piani di santa maria 72 00072 ariccia roma italia tel 39 06 93 73 11 fax 39 06 93 74 014 http www daikinapplied eu 20
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