Daikin EWWH490DZXEA2 [12/32] Anchoring

D-EIMWC01405-18EN- 12/32

The units are shipped with refrigerant valves closed to isolate such fluids during shipment. The

valves must remain closed until such time as an authorized Daikin technician, after inspecting the

machine and checked its installation, commissions the machine.

2.6 Anchoring

After positioning, the machine must be firmly anchored to the ground or foreseen metal structure to support the machine.

In this regard, 22 mm diameter holes are included on the machine base to ensure the anchoring.

2.7 Water pipes

2.7.1 Evaporator and condenser water pipes

The condensers and evaporators are provided with grooved sleeves for Victaulic connections or optionally with flanged

connections. The installer must provide the mechanical coupling with the connections appropriately sized to the system.

Some pressure couplings are included on both the inlet and outlet of the exchangers heads. These couplings control water

load loss.

Make sure that the water inlet and outlet connections agree with the dimensional drawing and the indications found on the

connections. Incorrect water pipe installation could create machine malfunctions and/or reduce performance.

NOTE

When using a hydraulic connection shared with the heating system, make sure the temperature of the water flowing into

the evaporator does not exceed the maximum allowed value. This phenomenon might cause the safety valve to open and

thus the refrigerant to discharge into the atmosphere.

The pipes, before being attached to the machine, must be supported to reduce the weight and the stress on connections.

In addition, the pipes must be adequately insulated. A water filter that can be inspected must also be installed on both

inputs (evaporator and condenser). Install shutoff valves on both heat exchangers with suitable dimensions to permit

draining and inspection without having to completely drain the system.

To prevent damage to exchanger pipes, install a mechanical filter that can be inspected on each input,

able to filter solid objects greater than 1.2 mm in size

2.7.2 Flow Switch

A flow switch must be installed on the evaporator inlet pipe to ensure the correct water flow rate, before the unit is started.

Furthermore, this device shuts off the unit when water flow is interrupted, protecting the machine from the evaporator

freezing.

The flow switch must not be used as a machine control system

The absence of the flow switch on the evaporator water connection, voids the warranty for frost damage.

The evaporator and condenser are not self-draining; both must be purged

Thermometers and pressure gages must be installed on the water pipes near the heat exchangers connections.

Furthermore, vent valves must also be installed at the highest points on the pipe.

If necessary, the evaporator and condenser water box can be reversed. If this operation is completed, control sensors

have to be repositioned and gasket replaced.

If water pump noise could be excessive, we recommend using rubber insulating joints at both pump inlet and outlet. In

most cases it is not necessary to install anti-vibration joints on condenser pipe inlet and outlet but, where the noise and

vibration are critical (for example where a buried pipe passes through a wall in an inhabited area), it may be necessary.

If a cooling tower is used, a balancing valve must be installed. A temperature control system is required if the water tower

is very cold. The controller installed on the machine manages tower fan on/off or continuously manages a control valve or

fan speed controller by means of a 0-10 V DC analog signal. We recommend that you carry out the connection, allowing

fan management by the machine controller (see wiring diagram for connection).