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Stulz Split-Air CST 50 User Manual

Stulz Split-Air CST 50
77 pages
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230/1/50 400/3/50
SPLIT-AIR
A/C UNITS
Index 39
Edition 2.04
PRECISION A/C UNITS
AIR CONDITIONING
OPERATING INSTRUCTIONS
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Stulz Split-Air CST 50 Specifications

General IconGeneral
BrandStulz
ModelSplit-Air CST 50
CategoryAir Conditioner
LanguageEnglish

Summary

Introduction

Technical Data Split-Air CST 40 / 50

Technical Data Split-Air CST 60 / 80

Electrical Data Split-Air CST 40 / 50

Electrical Data Split-Air CST 60 / 80

1. Unpacking and Inspection

2. Unit Identification

3. Operating Principle

9. Cooling Components

11. Control, Monitoring and Safety Components

11.1 HIGH PRESSURE SAFETY SWITCH

Stops compressor when refrigeration circuit pressure exceeds set value.

11.2 LOW PRESSURE SAFETY SWITCH

Stops compressor when refrigeration circuit pressure drops below set value.

11.10 Electronic control C1010

Microprocessor-based board for unit control, optional telemonitoring link.

Sequencing - How to connect and configure

Instructions for connecting and configuring multiple units in sequence.

Input Assignment

Output Assignment

Dehumidification control

ADJUSTING SET-POINT/ALARM SET POINT PROCEDURE

USER SETUP

Procedure for modifying parameters like temperature setpoint during cooling.

Parameter List

SENSOR ADJUSTMENT - How to configure

Offset Calculation

Calculating sensor offset based on real vs. C1010 reading.

Unit Configuration

Configuring sensors for unit 1 and subsequent units.

12. Installation

POSITIONING OF INDOOR UNIT

Checks and requirements for indoor unit placement, including space and wall support.

POSITIONING OF OUTDOOR (MOTOR-CONDENSING) UNIT

CONNECTION OF REFRIGERANT CIRCUIT

TABLE 1: Standard diameters of R407c pipes

Table showing pipe diameters and potential problems based on distance.

TABLE 2: Additional charge of R407c refrigerant for piping distance* beyond 5m

Table for calculating additional refrigerant charge based on piping distance.

Refrigerant Lines Installation Guidelines

Rules for routing, insulation, and slope of refrigerant lines.

Maximum Distance and Height Difference

Specifies maximum allowed distance and height difference for connecting pipes.

Refrigerant Connections

Diagrams showing IN/OUT connections for evaporating and motor-condensing units.

Refrigerant Charging

Procedure for adding refrigerant after installation and start-up.

OIL CHARGE

Details on compressor oil type, lubrication, and handling precautions.

13. Electrical Connections

User Responsibilities

User must furnish isolating switch and adhere to cable standards.

Power Supply Connection

Guidelines for main power and DC power supply lines, polarity, and cable section.

Inter-unit Connection

Connecting main power supply between evaporating and condensing units.

Configuration for cable connections

14. Start-up

with THERMOSTAT CONTROL

Procedure for starting the unit using thermostat control.

with ELECTRONIC CONTROL

Procedure for starting the unit using C1010 controller.

15. First Checks after Starting the Unit

17. Maintenance

Space required for maintenance

Diagrams showing space requirements for indoor unit maintenance.

horizontal application with and without free-cooling

Space requirements for horizontal indoor unit installation.

Outdoor unit

Space requirements for outdoor unit installation.

17.1 PREVENTIVE MAINTENANCE SCHEDULE

Schedule for regular checks and cleaning of unit components.

17.3 REPLACEMENT OF PARTS

Recommendations for replacing components based on MTBF.

17.4 HOW TO CLEAN THE UNIT

Instructions for cleaning the unit, including condenser and inner parts.

19. Options

19.13 ΚΕΥPAD FOR C1010 - KPDC1010

Keypad for displaying unit status and alarms, connected to C1010.

20. Residual Hazards and Emergency Information

20.3 HAZARDS ARISING FROM ELECTRICAL FAULTS

Discusses risks from electrical faults and safety standards.

20.3.3 HIGH VOLTAGE

Risks associated with high voltage contact and its effects.

20.3.4 SAFETY STANDARDS TO COMPLY WITH WHEN THE EQUIPMENT IS SWITCHED OFF

Safety measures when working on the unit with power off.

20.3.6 SAFETY STANDARDS TO COMPLY WITH DURING MAINTENANCE

Safety standards to follow during maintenance operations.

20.4 SAFETY STANDARDS TO COMPLY WITH WHEN WORKING ON REFRIGERATION CIRCUITS

Precautions for handling refrigerants and working on cooling circuits.

21. Disassembling the Unit

WARNING!

Warning about refrigerant gas and lubricants being pollutants.

22. Faults, Probable Causes, Possible Remedies

22.1 FAILS TO COOL

Troubleshooting for units not cooling, with causes and remedies.

22.2 FAILS TO COOL SUFFICIENTLY

Troubleshooting for insufficient cooling, with intermittent operation.

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