Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 903
Catalog No. 533-095
Printed in U.S.A.
Form 30G,H-5T
Pg 1
8-99
Replaces: 30G,H-4T
Book 2
Tab
5c
Controls Start-Up, Operation,
Service, and Troubleshooting
SAFETY CONSIDERATIONS
Installing, starting up, and servicing this equipment can be
hazardous due to system pressures, electrical components, and
equipment location (roof, elevated structures, etc.). Only
trained, qualified installers and service mechanics should in-
stall, start up, and service this equipment.
When working on this equipment, observe precautions in
the literature, and on tags, stickers, and labels attached to the
equipment, and any other safety precautions that apply. Follow
all safety codes. Wear safety glasses and work gloves. Use care
in handling, rigging, and setting this equipment, and in han-
dling all electrical components.
CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . 1
GENERAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2,3
MAJOR SYSTEM COMPONENTS
. . . . . . . . . . . . . . . . . 3
Processor Module (PSIO-1)
. . . . . . . . . . . . . . . . . . . . . . 3
DSIO-HV Relay Module
. . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electronic Expansion Device Module
. . . . . . . . . . . . . 3
Compressor Protection Module (CPM)
. . . . . . . . . . . 3
PSIO-2 (8052) Module
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Keypad and Display Module
(Also Called HSIO-II)
. . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Control (LOR) Switch
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
OPERATION DATA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44
Electronic Expansion Device (EXD)
. . . . . . . . . . . . . . 3
• EXV OPERATION
• ECONOMIZER OPERATION
Oil Pumps
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Motor Cooling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Back Pressure Valve (30GX and 30HXA only)
. . . . . 4
Sensors
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Compressor Protection Module (CPM)
. . . . . . . . . . . 4
• OUTPUTS
• INPUTS
Wye-Delta vs Across-the-Line (XL)
Starting Option
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Capacity Control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
• MINUTES LEFT FOR START
• MINUTES OFF TIME
• LOADING SEQUENCE
• CLOSE CONTROL
• LEAD/LAG DETERMINATION
• CAPACITY SEQUENCE DETERMINATION
• MINIMUM LOAD VALVE
• CAPACITY CONTROL OVERRIDES
Head Pressure Control
. . . . . . . . . . . . . . . . . . . . . . . . . . 10
• GENERAL
• AIR-COOLED UNITS (30GX)
• WATER-COOLED UNITS (30HXC)
• CONDENSERLESS UNITS (30HXA)
• 09DK CONDENSING UNITS
• ADJUSTING PID ROUTINES
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation and ser-
vice. There may be more than one disconnect switch. Tag
all disconnect locations to alert others not to restore power
until work is completed.
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out com-
ponents, or to bypass or otherwise depart from recom-
mended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the electronic
modules or electrical components.
To prevent potential damage to heat exchanger tubes
always run fluid through heat exchangers when adding or
removing refrigerant charge. Use appropriate brine solu-
tions in cooler and condenser fluid loops to prevent the
freezing of heat exchangers when the equipment is exposed
to temperatures below 32 F (0
°
C).
DO NOT VENT refrigerant relief valves within a build-
ing. Outlet from relief valves must be vented outdoors in
accordance with the latest edition of ANSI/ASHRAE
(American National Standards Institute/American Society
of Heating, Refrigeration and Air Conditioning Engineers)
15 (Safety Code for Mechanical Refrigeration). The accu-
mulation of refrigerant in an enclosed space can displace
oxygen and cause asphyxiation. Provide adequate ventila-
tion in enclosed or low overhead areas. Inhalation of high
concentrations of vapor is harmful and may cause heart ir-
regularities, unconsciousness or death. Misuse can be fatal.
Vapor is heavier than air and reduces the amount of oxygen
available for breathing. Product causes eye and skin irrita-
tion. Decomposition products are hazardous.
DO NOT attempt to unbraze factory joints when servicing
this equipment. Compressor oil is flammable and there is
no way to detect how much oil may be in any of the refrig-
erant lines. Cut lines with a tubing cutter as required when
performing service. Use a pan to catch any oil that may
come out of the lines and as a gage for how much oil to add
to system. DO NOT re-use compressor oil.
30GX080-350
30HXA,HXC076-271
ECOLOGIC™ Air-Cooled and Fluid Cooled Chillers
50/60 Hz
Series 3
