Water Piping - Daikin WGZ030DW Installation And Maintenance Manual

Unit Configuration

Water Piping

WGZ 030DW to 130DW have two refrigerant circuits, two
tandem scroll compressors (total of four), a single two-
circuited brazed plate evaporator, a single two-circuited water-
Figure 1: Schematic Piping Diagram (One of Two Circuits for Brazed Plate Evaporators)
Chilled Evaporator
Water
LWT
Legend:
T T
Temperature Sensor
T P
Pressure Transducer
P
Pressure (High Pressure Cutout)
1
Temperataure Sensor, Leaving
LWT
Chilled Water Control
S
Solenoid Valve
F-D Filter-Drier
Install Vessel Drain Plugs at Start-up
Condensers are drained of water in the factory and are shipped
with the condenser drain plugs in the heads removed and
stored in a bag in the control panel. Be sure to replace plugs
prior to filling the vessel with fluid.
General Piping Guidelines
Due to the variety of piping practices, it is advisable to follow
the recommendations of local authorities for code compliance.
They can supply the installer with the proper building and
safety codes required for a safe and proper installation.
IM 1131-2
T
T
S
S
F-D
cooled condenser, interconnecting refrigerant piping and a
control panel with associated sensors and transducers. Models
WGZ 150DW to 200DW have two trio-compressors (total of
6) and a shell-and-tube evaporator.
P S
P
1
Comp
Comp
#1
#2
C V
Con denser
Condenser
T
S
Relief Valve
T S
Schrader Fitting
Thermal Expansion Valve
Sight Glass / Moisture In dicator
C V
Charging Valve
Angle Valve
Ball Valve
The piping should be designed with a minimum number of
bends and changes in elevation to keep system cost down and
performance up. Other piping design considerations include:
All piping should be installed and supported to prevent
1
the chiller connections from bearing any strain or weight
of the system piping.
Vibration eliminators to reduce vibration and noise
2
transmission to the building.
Shutoff valves to isolate the unit from the piping system
3
during unit servicing.
Do not use PVC or CPVC piping for any water lines.
4
Water Piping
Water
NOTE:
Standard condenser
connections are on
the control panel end.
5