Carrier 30HK User Manual

Carrier Parkway • Syracuse NY 13221
Reciprocating Liquid Chillers (60 Hz)
All 208/230-volt units have extended-voltage
compressor motors.
All units have suction-cutoff unloading
system.
CONTENTS
Page
SAFETY CONSIDERATIONS. I
INSTALLATION.1-6
Step 1 — Inspect Shipment. 1
Step 2 — Rig and Place Unit. I
• RIGGING
• PLACEMENT
Step 3 — Check Compressor Mounting
and Connections. 3
• SERVICE ACCESS
Step 4 — Make Piping Connections. 3
• CONDENSER DESCRIPTION
• CONDENSER PIPING
• COOLER DESCRIPTION
• COOLER PIPING
Step 5 — Make Electrical Connections . 4
• ELECTRICAL BOX, CONTROL SECTION
• UNBALANCED 3-PHASE SUPPLY
VOLTAGE
• ELECTRICAL BOX, POWER SECTION
START-UP AND SERVICE. 6
Initial Check. 6
Check Refrigerant Charge. 6
• LIQUID CHARGING METHOD
Check Oil Charge. 7
• TO ADD OIL
• TO REMOVE OIL
START-UP.7-10
Check Refrigerant Feed Components. 7
• THERMOSTATIC EXPANSION VALVE
• FILTER DRIER
• MOISTURE-LIQUID INDICATOR
• LIQUID-LINE SERVICE VALVE
• LIQUID-LINE SOLENOID VALVE
• PRESSURE RELIEF DEVICES
• CHECK VALVE
Check Compressor Protection Devices. 8
• CIRCUIT BREAKER
• MOTOR OVERTEMPERATURE
THERMOSTAT
• CRANKCASE HEATER
• TIME GUARD® CONTROL
• FOUR-FUNCTION TIMER
• OIL PRESSURE SAFETY
SWITCH (OPS)
Check Unit Safety Devices.9
• SAFETY THERMOSTAT
• HIGH-PRESSURE SWITCH
• LOW-PRESSURE SWITCH
Check Capacity Control System. 10
• DESCRIPTION
• 3-STEP TEMPERATURE
CONTROLLER
DESIGN SET POINT ADJUSTMENT
CYLINDER UNLOADING SYSTEM
Page
UNIT OPERATION.10-11
Control Power. 10
Control Sequence. 11
Unit Stoppage and Restart. 11
SERVICING COOLER.11-13
Tube Plugging. 12
Retubing . 12
Tightening Cooler Head Bolts . 12
• GASKET PREPARATION
• BOLT TORQUES
• BOLT TIGHTENING SEQUENCE
TROUBLESHOOTING GUIDE.14,15
SAFETY CONSIDERATIONS
Installation, start-up and servicing of this
equipment can be hazardous due to system pres¬
sures, electrical components and equipment
location (roofs, elevated structures, etc.).
Only trained, qualified installers and service
mechanics should install, start-up and service
this equipment.
When working on the equipment, observe pre¬
cautions in the literature, 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 bulky
equipment.
INSTALLATION
Step 1 — Inspect Shipment
Inspect unit for damage or missing parts. If dam¬
age is detected, or if shipment is incomplete, file a
claim immediately with the shipping company.
Step 2 — Rig and Place Unit
RIGGING
On each end of cooler, a steel loop is provided for
the preferred method of lifting unit. Use spreader
bars to keep cables away from compressor enclo^
sure and control box. If unit is to be moved by fork
truck, use the following methods:
1. From front or rear, lift under the cooler rails.
Unit can be either on or off skid.
2. When moving from ends, leave unit on skid. Lift
from under skid.
© Carrier Corporation 1983
Form 30HK,HL-10SI

Carrier 30HK Specifications

General

Compressor Type	Scroll
Refrigerant	R-410A
Phase	3
Control System	Microprocessor
Type	Air-cooled

Summary

SAFETY CONSIDERATIONS

General Safety Precautions

Follow all safety codes, wear safety glasses, and use care when handling equipment.

INSTALLATION

Installation Steps Overview

Covers inspection, rigging, connections, and electrical hookups for unit installation.

Installation Placement and Mounting

Unit Placement Guidelines

Instructions for final unit positioning, leveling, and securing to the floor or pad.

Installation Step 3: Compressor Mounting

Compressor Mounting and Connections

Procedure for removing shipping bolts and reassembling compressor mounting hardware.

Installation Step 4: Piping Connections

Condenser Description and Piping

Details on shell-and-tube condenser, subcooler, and piping requirements.

Cooler Description and Piping

Information on direct-expansion cooler, insulation, and piping recommendations.

Installation Step 5: Electrical Connections

Electrical Connection Requirements

Electrical Box - Power Section

Power Supply and Wiring

Details on main power connections, circuit breaker, and contactors.

Start-Up: Initial Checks

Pre-Start Component Checks

Refrigerant Charge Verification

Refrigerant Charging Procedures

Liquid Charging Method

Detailed steps for charging refrigerant using the liquid charging method.

Compressor Oil Management

Instructions for managing compressor oil levels, including adding and removing.

Compressor Protection and Safety Devices

Protection Devices Overview

Safety Switches and Thermostats

Oil Pressure Safety Switch (OPS)

Unit Safety Device Checks

Safety Thermostat and High-Pressure Switch

Low-Pressure Switch (LPS)

Cooler Servicing: Tube Maintenance

Tube Plugging Procedure

Method for plugging leaky tubes using specific components and cautionary notes.

Cooler Retubing Process

Troubleshooting Guide - Compressor Issues

Compressor Not Running or Cycling

Diagnosing and resolving issues like compressor not running, cycling on low/high pressure, or oil loss.

Unit Operation and Refrigerant Issues

Troubleshooting continuous operation, frosted suction lines, and other system problems.

Troubleshooting Guide - System and Performance

System Noises and Freeze-Up

Identifying causes and remedies for system noises and freeze-up conditions.

Performance and Loading Issues

Troubleshooting hot liquid lines, frosted lines, and compressor loading/unloading problems.