Daikin EWWQ-AJYNN Service Manual page 7

ESIE 07-05
1.5 Installation
Warning
Receiving and
handling
Location
Compressor
condensation
Water treatment
Head pressure
control, tower
system
Before any operation please check the instruction for use.
Installation and maintenance are to be performed only by qualified personnel who are familiar with
local codes and regulations, and who are experienced with this type of equipment. Must be avoided
the installation of the unit in places that could be considered dangerous for maintenance operations.
Inspect the unit immediately after receipt for possible damage. The unit is shipped ex-factory and all
claims for handling and shipping damage are the responsibility of the consignee. Leave the shipping
skid in place until the unit is in final position. This will aid in handling the equipment. Use extreme care
when rigging the equipment to prevent damage to the control centre, or refrigerant piping. See
Dimensional Data for the centre of gravity of the unit.
A levelled and sufficiently strong floor is required. If necessary, additional structural members should
be provided to transfer the weight of the unit to the nearest beams.
Rubber-in-shear isolators can be furnished and field placed under each corner of the package. A
rubber anti–skid pad should be used under isolators if hold-down bolts are not used.
Vibration isolator in all water piping connected to the chiller are recommended to avoid straining the
piping and transmitting vibration and noise.
Condensation occurs on the compressor surface when the temperature of the compressor surface is
lower than the ambient dew point temperature. Drain pans with drain connections are provided
underneath each compressor to collect the condensate. The compressor motor housing extends past
the drain pans. Install a floor drain close to the unit to collect condensate from motor housing and
condensate pans.
If unit is operating with a cooling tower, clean and flush cooling tower. Make sure tower "blowdown" or
bleedoff is operating. Atmospheric air contains many contaminants which increases the need for water
treatment. The use of untreated water may result in corrosion, erosion, sliming, scaling, or algae
formation. A water treatment service is recommended. Daikin is not responsible for damage or faulty
operation from untreated or improperly treated water.
The minimum entering water temperature to the condenser must not be lower than 15 °C at full tower
water flow. If lower temperature water is used, the flow must be reduced proportionally. Use a
three-way bypass valve around the tower to modulate the condenser water flow. Figure 1 shows a
three-way pressure actuator water regulating valve used for cooling applications. This regulating valve
will assure an adequate condensing pressure if the inlet condenser water temperature falls below
15 °C.
Introduction
3
4
5
v