Sterling 30RA010-055 - Manual

Sterling 30RA010-055

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Table of Contents:

  • Page 2 – CONTENTS; Sterlco; GENERAL
  • Page 3 – Table 1 — Unit Sizes; UNIT
  • Page 4 – Sensors —
  • Page 16 – ENTER; MODE; ESCAPE; Fig. 7 — Main Base Board
  • Page 17 – Capacity Control —; Fig. 9 — Typical Space Temperature; CN Communications Bus Wiring
  • Page 18 – TEST; Fig. 11 — Energy Management Module
  • Page 20 – LWT —; Fig. 12 — Deadband Multiplier
  • Page 21 – Head Pressure Control —; The Main Base Board; Fig. 13 — Operating Envelope for; FAN ARRANGEMENT; Fig. 14 — 30RA Condenser Fan Sequence
  • Page 22 – Cooling Set Point Select
  • Page 23 – Table 8 — Control Methods and Cooling Set Points; Both main power; CONTROL; Fig. 16 — Scrolling Marquee Display
  • Page 26 – Table 9 — Marquee Display Menu Structure*; Fig. 17 — Dual Chiller Thermistor Location
  • Page 27 – Table 10 — Run Status Mode and Sub-Mode Directory
  • Page 34 – Table 18 — Time Clock Mode and Sub-Mode Directory
  • Page 38 – Table 21 — Dual Chiller Configuration (Master Chiller Example)
  • Page 40 – Table 22 — Dual Chiller Configuration (Slave Chiller Example)
  • Page 41 – Table 23 — Operating Modes
  • Page 42 – Table 24 — Example of Reading and Clearing Alarms
  • Page 43 – Temperature Reset —; The control system is capable of
  • Page 44 – Demand Limit —; Fig. 18 — Standard Chilled Fluid; Fig. 20 — Space Temperature Reset
  • Page 45 – EMM
  • Page 46 – Table 27 — Configuring Demand Limit; TROUBLESHOOTING
  • Page 47 – Table 28 — Troubleshooting
  • Page 53 – Alarms and Alerts —; Table 29 — Alarm and Alert Codes
  • Page 58 – Table 30 — Unit Torque Specification; Cooler; FASTENER
  • Page 59 – HPS —
  • Page 60 – Check Oil Charge —; Table 31 — Oil Charge; Condenser Section and Coils; COMPRESSOR
  • Page 61 – Check Refrigerant Feed Components; The valve is factory-set to maintain between 8 and 12 F; Fig. 31 — 30RA Access Panels
  • Page 62 – The amount of capacity reduction achieved by the mini-; Compressor and Unit Protective Devices; Manual starters are factory set field adjustment should not; Check Unit Safeties; The high-pressure switch is mounted in the discharge side; Table 32 — Factory Settings, High-Pressure; Clear the alarm using the Scrolling Marquee display as de-; Fig. 34 — Mounting Locations for TXV Sensing Bulb
  • Page 68 – Strainer —; Periodic factory-installed strainer cleaning is; Motormaster® V Controller —; When the ambient air temperature drops, a fan running at; Fig. 36 — Thermistor Connections to
  • Page 70 – Mode; Fig. 38 — Pressure Transducer and Start Command Jumper Wiring
  • Page 71 – FAULT CODE
  • Page 72 – Table 38 — Motormaster® V Program Parameters for Operating Modes
  • Page 73 – Table 39 — Replacement Modules; Hydronic Package —
  • Page 74 – Table 40 — Minimum Cooler Flow Rates and
  • Page 75 – Check Refrigerant Charge —; All 30RA units are; Operating Limitations; Fig. 39 — Compressor Connections and Oil Sight Glass Location
  • Page 76 – OPERATION SEQUENCE; UNIT SIZE 30RA
  • Page 77 – APPENDIX A; CN Tables
  • Page 79 – DUALCHIL (Dual Chiller Configuration Settings)
  • Page 82 – MAINTENANCE; ALARMS: Maintenance Display
  • Page 86 – RUNTEST: Maintenance Display; DESCRIPTION
  • Page 88 – WSMDEFME: Maintenance Display
  • Page 89 – APPENDIX B; AND MANUAL STARTERS
  • Page 91 – The 30RAN chiller can be inter-; DataPort, DataLink, BAClink Object Definition; CIRCADIO
  • Page 92 – OPTIONS
  • Page 93 – START-UP CHECKLIST FOR 30RA LIQUID CHILLER; Design Information; II. Preliminary Equipment Check; Chilled Water System Check
  • Page 94 – Start and Operate Machine. Complete the Following:; YES
  • Page 95 – Compressor Running Current —
  • Page 97 – RECORD CONFIGURATION SETTINGS
  • Page 98 – RECORD CONFIGURATION INFORMATION BELOW.
  • Page 99 – RECORD CONFIGURATION INFORMATION BELOW:; SLCT (Setpoint and Ramp Load Configuration)
  • Page 100 – COMPONENT TEST; Service Test Mode and Sub-Mode Directory
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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 903

Catalog No. 533-00047

Printed in U.S.A.

Form 30RA-2T

Pg 1

1-03

Replaces: 30RA-1T

Book 2

Tab

5c

Controls, Star t-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, mechanical
rooms, etc.). Only trained, qualified installers and service
mechanics should install, 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
handling all electrical components.

Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation and
service. There may be more than one disconnect switch.
Tag all disconnect locations to alert others not to restore
power until work is completed.

DO NOT VENT refrigerant relief valves within a building.
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
accumulation of refrigerant in an enclosed space can
displace oxygen and cause asphyxiation. Provide adequate
ventilation in enclosed or low overhead areas. Inhalation of
high concentrations of vapor is harmful and may cause
heart irregularities, 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 irritation. 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
refrigerant 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.

This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out
components, 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, always run
fluid through heat exchanger when adding or removing
refrigerant charge. Use appropriate brine solutions in cooler
fluid loop to prevent the freezing of brazed plate heat
exchanger, optional hydronic section and/or interconnecting
piping when the equipment is exposed to temperatures
below 32 F (0 °C). Proof of flow switch and strainer are
factory installed on all models. Do NOT remove power
from this chiller during winter shutdown periods without
taking precaution to remove all water from heat exchanger
and optional hydronic system. Failure to properly protect
the system from freezing may constitute abuse and may
void warranty.

Compressors and optional hydronic system pumps require
specific rotation. Test condenser fan(s) first to ensure
proper phasing. Swap any two incoming power leads to
correct condenser fan rotation before starting any other
motors.

Refrigerant charge must be removed slowly to prevent loss
of compressor oil that could result in compressor failure.

30RA010-055

AquaSnap® Air-Cooled Chillers

with

Comfort

Link™ Controls

50/60 Hz

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Summary

Page 2 - CONTENTS; Sterlco; GENERAL

2 CONTENTS Page SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2,3 MAJOR SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . . .3,4 General . . . . . . . . . . . . . . . . . . . . . ...

Page 3 - Table 1 — Unit Sizes; UNIT

3 Table 1 — Unit Sizes *60 Hz only. †50 Hz only. MAJOR SYSTEM COMPONENTS General — The 30RA air-cooled reciprocating chillers contain the ComfortLink™ electronic control system thatcontrols and monitors all operations of the chiller. The control system is composed of several components as listed in ...

Page 4 - Sensors —

4 At each system element, the shields of its communication bus cables must be tied together. If the communication bus isentirely within one building, the resulting continuous shieldmust be connected to a ground at one point only. If the commu-nication bus cable exits from one building and enters ano...

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