Stulz SCS Series User Manual

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SCS Series

Installation, Operation and Maintenance Manual

Remote Air Cooled Condensers

For Indoor Cooling Systems

Table of Contents

Questions and Answers:

B
brownedwinAug 5, 2025
Why Stulz SCS Air Conditioner unit fails to start?
- M
  Matthew ReedAug 5, 2025
  The Stulz Air Conditioner unit might fail to start due to several reasons. It could be due to incorrect phasing or voltage, which requires correcting the phase or voltage input. Another reason could be a power failure, so check the power source, power input, fuses, control cables, and connections. Lastly, the overload protection might have tripped; in this case, inspect the pressure/temperature operating switches and the motor, replacing them if necessary.
J
Jonathan YatesAug 10, 2025
What to do if condenser head pressure is too high in Stulz SCS?
- E
  Elizabeth SharpAug 11, 2025
  If the condenser head pressure in your Stulz Air Conditioner is too high, it could be due to several reasons. First, check for low condenser airflow, indicated by excessively warm air leaving the condenser fan; open air passages, clean the coil, and check the condenser fan(s). It could also be due to an overcharge of refrigerant, in which case you should reclaim the excess refrigerant from the system. Another potential cause is a condenser fan not operating, so check the main voltage power source to the unit, fan motor, contractor, fan cycling switch or fan speed controller. Also check pressure/temperature operating switches and motor, replacing if needed.
J
Jordan AdamsAug 16, 2025
How to fix condenser head pressure too low on Stulz SCS Air Conditioner?
- S
  Scott SteinAug 17, 2025
  If the condenser head pressure is too low in your Stulz Air Conditioner, it could be due to a loss of refrigerant, indicated by bubbles in the sight glass. Locate and repair the leak, then recharge the system. Alternatively, the condenser fan controls may not be set properly; adjust or repair them accordingly.
M
Monica YuAug 22, 2025
How to resolve erratic fan operation in Stulz SCS?
- E
  Evelyn HickmanAug 22, 2025
  Erratic fan operation in your Stulz Air Conditioner may be caused by a dirty or blocked condenser coil. Clean the coil or remove any blockage to resolve this issue.
L
Leslie CordovaAug 28, 2025
How to fix erratic control in Stulz Air Conditioner?
- C
  Christopher SaundersAug 28, 2025
  If the control in your Stulz Air Conditioner is erratic, it may be due to wiring that is improperly connected or broken. Check the wiring against the schematic diagram to correct this.

Stulz SCS Series Specifications

General

Brand	Stulz
Model	SCS Series
Category	Air Conditioner
Language	English

Summary

Notice

Introduction

General

General overview and purpose of the manual and unit.

Product Description

Details about the SCS series remote air cooled condensers.

Safety

Important safety guidelines and precautions for operation and maintenance.

General Design

Description of the physical and structural design of the condensers.

Head Pressure Controls

Explanation of different methods for controlling head pressure.

Installation

Receiving the Equipment

Instructions for inspecting and accepting the delivered equipment.

Site Preparation

Guidelines for selecting and preparing the installation location.

Rigging

Procedures for safely lifting and moving the condenser unit.

Mounting and Placement

Details on how to securely mount and position the condenser unit.

Refrigerant Piping

Guidelines and procedures for connecting refrigerant lines.

Utility Connections

Information on making electrical connections for power and control.

System Charging

Steps and guidelines for charging the system with refrigerant.

Refrigerant Characteristics

Information about the properties and handling of refrigerants.

Start-Up/Commissioning

Operation

General overview of the unit's operation and startup procedures.

Operational Description

Explanation of how the condenser functions with the A/C system.

Maintenance and Repairs

Periodic General Maintenance

Recommended schedule and tasks for routine condenser maintenance.

General

General information on accessing the unit for maintenance.

Field Service

Procedures and guidelines for performing repairs in the field.

Leak Detection

Methods for identifying leaks in the refrigeration system.

Leak Repair

Steps for properly repairing detected leaks in the system.

Product Support

Technical Support

Information on how to contact STULZ for technical assistance.

Obtaining Warranty Parts

Procedure for obtaining replacement parts under warranty.

Obtaining Spare/Replacement Parts

How to order spare and replacement parts from STULZ.

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