Daikin FWW02-20DA, Инструкция по установке, эксплуатации и обслуживанию, Страница: 5 / 12

3
Fig.3
DETAIL A:
HANGING ROD
EXPANSION SCREW
NUT
FAN COIL UNIT
FLAT WASHER&SPRING WASHER
RUBBER MATS
Detail A
AIR DUCT CONNECTION
1. Circulatory air pressure drop should be within External Static Pressure.
2. Galvanized steel air ducts are suitable.
3. Make sure there is no leak of air.
4. Air duct should be fire-proof, refer to concerned country national and local regulations.
PIPE CONNECTION
1. Using suitable fittings as water pipe connections with reference to the outline and dimensions.
2. The water inlet is on the bottom while outlet on top.
3. The connection must be concealed with rubberized fabric to avoid leakage.
4. Drain pipe can be PVC or steel.
5. Water filter should be installed in the chiller water pump inlet and evaporator inlet pipes to prevent from
block.
6. Use flexible connector tubes to connect the water entering and leaving pipes of the unit. Seal the joint
with tape after connection. Keep the wrench near the water entering and leaving pipe during pipeline
connection. Fasten the joints slowly at a constant speed. The torque is 110 N●m (11.2 kgf●m) at most.
When tools with long arm of force are used, properly set the torque. An excessive torque can deform or
even damage the copper pipe and cause leakage. The pipeline connection is shown in the following
figure.
A
B
Water
outlet
Adaptor
Note:Plane A(where the torque exists)must be
perpendicular to Plane B(along which the
directions of the water inlet and outlet follow)
Remarks
：
Customers must prepare devices marked in the dashed box
Flexble
connector
Flexible connector
Two-way valve
Water entering
Filter
Gate valve
Water leaving
Drain pipe for
condensate water
Discharge valve
7. The suggested slope of the drain pipe is at least 1:50.
8. The water system must be preliminary softening treatment, aimed to protecting plate exchanger from
scaling. In addition, the unsoften water may be scaled on the pipeline, leading to increasing the water
resistance, and the water flow and water pump will be impacted.
Requirements of water quality are listed in the following table: