Introduction; General Description; Nomenclature; Water Pressure Drop - Daikin WGZ030DW Operating And Maintenance Manual

Introduction

General Description

Daikin Type WGZ water chillers are designed for indoor installations Equipment room temperature for
operating and standby conditions is 40°F to 122°F (4.4°C to 50°C). They are available with water-cooled
condensers (Model DW), or arranged for use with remote air-cooled or evaporative condensers (Model
DA). Each water-cooled unit is completely assembled and factory wired before evacuation, charging and
testing. They consist of hermetic scroll compressors, brazed-plate evaporator, water-cooled condenser (WGZ-
DW), and complete refrigerant piping.
Units manufactured for use with remote condensers (Models WGZ-DA) have all refrigerant specialties factory-
mounted and connection points for refrigerant discharge and liquid lines.
Liquid line components that are included are manual liquid line shutoff valves, charging valves, filter-driers,
liquid line solenoid valves, sight glass/moisture indicators, and thermal expansion valves. Other features
include compressor crankcase heaters, and a MicroTech II microprocessor controller.
The electrical control center includes all equipment protection and operating controls necessary for dependable
automatic operation.
NOTE: This manual contains information on the chiller unit control software operating with various
refrigerants as follows:
• R-410A, used with the current "D" vintage of the WGZ chiller.
• R-134a, used with only with Model TGZ Templifiers. The operating manual devoted exclusively to
Templifiers is OMM 1136.
BOOT & BIOS
BOOT Version: 3.0F
Manuals: Information in unit initial installation and routine maintenance is contained in Installation and
Maintenance Manual IM 1131.
Water-Cooled
Global Design
Scroll Compressor

Water Pressure Drop

Water flow rates should be maintained as closely as possible to job design values. The vessel flow rates must
fall between the minimum and maximum values shown on the appropriate evaporator and condenser curves.
Measure the water pressure drop through the vessels at field-installed pressure taps and check the flow rate
using the following tables. Do not include valves or strainers in these readings.
The evaporator flow rates and pressure drops shown on the following page are for full load design purposes.
The maximum flow rate and pressure drop are based on a 6-degree temperature drop. Avoid higher flow rates
with resulting lower temperature drops to prevent potential control problems resulting from very small control
bands and limited start up/shut off temperature changes.
The minimum flow and pressure drop is based on a full load evaporator temperature drop of 16-degrees.
OMM 1130-2
BIOS Version 3.56

Nomenclature

W G Z 100 - D W
W = Water-Cooled Cond.
A = Unit Less Cond.
Design Vintage
Nominal Capacity (Tons)
3