SPX FLOW Deltech ZP Series

Questions and Answers

C
Cody WilliamsNov 17, 2025
What to do if the SPX FLOW Dehumidifier shows an outlet dew point alarm?
- R
  Richard SmithNov 18, 2025
  If your SPX FLOW Dehumidifier displays an outlet dew point alarm, several factors could be responsible. First, check if the inlet airflow is higher than the sizing condition and reduce it if necessary. Also, inspect the inlet air line for liquids and examine the prefilter and drain valve, cleaning, repairing, or replacing the automatic drain valve as needed. Ensure that the inlet air temperature matches the sizing condition by inspecting the compressor aftercooler and cooling system. Desiccant dusting might be the cause, so check the air pressure, airflow, and airflow surges and correct them as necessary, and consider replacing the desiccant. If the desiccant is contaminated, especially with oil, replace the prefilter element and clean, repair, or replace the drain valve. You may need to c...
S
Sean ShafferNov 22, 2025
What to do if SPX FLOW Dehumidifier displays a low pressure alarm for the drying tower?
- K
  Kevin OliverNov 22, 2025
  If your SPX FLOW Dehumidifier is showing a low pressure alarm for the drying tower, consider these potential causes: * A loss of dryer air supply, in which case you should check the compressor supplying the dryer. * Excessive air demand, so check the equipment downstream of the dryer. * A faulty drying tower pressure switch, so check its operation using the tower pressure gauge for comparison and replace it if defective. * A drying tower inlet valve failing to open, so examine the valve and actuator for damage, repairing or replacing them as necessary. * A drying tower purge exhaust valve failing to close, indicated by airflow out of the drying tower purge valve or exhaust piping, meaning the valve isn't completely closed. * A drying tower depressurization valve failing to cl...
W
William BennettNov 24, 2025
How to troubleshoot high pressure alarm during regeneration in SPX FLOW Dehumidifier?
- D
  David AndersonNov 25, 2025
  To troubleshoot a high pressure alarm during regeneration in your SPX FLOW Dehumidifier, start by checking the regenerating tower pressure switch operation against the tower pressure gauge, replacing the switch if it's faulty. Inspect the regenerating tower depressurization muffler for clogs, cleaning or replacing it as needed. Verify the operation of the regenerating tower depressurization valve, repairing or replacing it if necessary. Ensure the regenerating tower purge exhaust piping is free of obstructions. Check for pilot air loss in the regenerating tower purge exhaust valve by ensuring the manual drain valve on the pilot air filter's bottom is fully closed, the pilot air filter cartridge isn't clogged, and the pilot air shut-off valve is open. Similarly, check the repressurization v...

SPX FLOW Deltech ZP Series Specifications

General

Brand	SPX FLOW
Model	Deltech ZP Series
Category	Dehumidifier
Language	English

Summary

General Safety Information

Receiving, Storing, and Moving

Instructions for receiving, storing, and handling the dryer safely.

Description

Function

Explanation of how the blower purge type regenerative dryer operates.

Installation

System Arrangement

Guidelines for installing the dryer within the compressed air system.

Ambient Air Temperature

Specifies the recommended ambient temperature range for dryer operation.

Location and Clearance

Requirements for dryer placement and necessary service space.

Piping and Connections

Details on external piping, connections, and support requirements.

Electrical Connections

Procedures and safety precautions for electrical hookups.

RS-232 Connections

Information on connecting the dryer to a host computer via RS-232.

Initial Desiccant Charge

To Add Desiccant

Step-by-step instructions for filling the dryer towers with desiccant.

Instrumentation

Controls

Overview of the solid-state controller, LEDs, and display.

Chamber Pressure Gauges

Explanation of the chamber pressure gauges and their readings.

Purge Flow Pressure Gauge

Description of the gauge indicating purge air pressure.

Energy Management System

Details on the optional EMS for adjusting operation based on conditions.

Dew Point Transmitter

Information on the dew point monitoring and alarming option.

Operation

Controls

How the controller manages dryer operations and displays status.

Operating Modes

Description of available operating modes like Fixed, EM, and Dew Point Control.

Operating Sequence Description

Detailed sequence for tower drying and regeneration cycles.

Control Board Jumpers

Jumper Functions

Explains the purpose of jumpers JP1 through JP8 for dryer configuration.

Operator Interface

Front Panel LEDs

Description of the indicator lights on the front panel.

Front Panel Switches

Overview of the switches on the operator interface.

Front Panel Operation

How to navigate and operate the dryer via the front panel.

Program Mode Screens

Detailed explanation of screens within the Program Mode.

Setup Mode Screens

Explanation of screens available in Setup Mode.

Alarm & Service Mode

Heater and Temperature Alarms

Covers alarms for heater inlet temp, RTD readings, and heat low temp.

Optional Device Alarms

Details alarms for Energy Management and Dew Point Sensors.

Test Mode

Test Mode Screens

Descriptions of the screens used in the Test Mode.

Start-up

Controller Settings

Procedures for setting or verifying controller parameters.

Initial Pressurization

Steps for slowly pressurizing the dryer system.

Energizing the Dryer

Instructions for powering up the dryer controls.

Bringing the Dryer On-line

Procedure to establish normal airflow through the dryer.

Operational Check Points

Key checks during dryer operation for safety and performance.

Loss of Power

Power Recovery

How the dryer behaves during and after a power interruption.

Using the RS-232 Port

Operation

Details on data format and communication for monitoring via RS-232.

Maintenance

Desiccant Replacement

Procedures and frequency for replacing desiccant material.

Purge Mufflers

Maintenance and replacement recommendations for purge mufflers.

Pilot Air Filter Element Replacement

Instructions for replacing the pilot air filter element.

Dew Point Analyzer Filter (optional)

Procedures for replacing the dew point analyzer filter element.

Troubleshooting

Power and Pressure Issues

Diagnosing no power, excessive pressure drop, and low/high pressure alarms.

Temperature and Dew Point Alarms

Troubleshooting temperature and dew point sensor under/over-range alarms.

Operational Alarms

Diagnosing outlet dew point, humidity, heater, blower, and EM alarms.

P&ID Schematic - Models 500 through 600

Sequence of Operation (Models 500 through 600)

Visual representation of the dryer's operational sequence.

P&ID Schematic - Models 750 through 4300

Sequence of Operation (Model 750 through 4300)

Visual representation of the dryer's operational sequence.

Replacement Parts

Models 500 through 600

List of replacement parts for models 500-600.

Models 750 through 1800

List of replacement parts for models 750-1800.

Models 2200 through 2600

List of replacement parts for models 2200-2600.

Models 3200 through 4300

List of replacement parts for models 3200-4300.

Warranty

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SPX FLOW Deltech ZP Series - User Manual

Table of Contents

Questions and Answers

SPX FLOW Deltech ZP Series Specifications

Summary

General Safety Information

Receiving, Storing, and Moving

Description

Function

Installation

System Arrangement

Ambient Air Temperature

Location and Clearance

Piping and Connections

Electrical Connections

RS-232 Connections

Initial Desiccant Charge

To Add Desiccant

Instrumentation

Controls

Chamber Pressure Gauges

Purge Flow Pressure Gauge

Energy Management System

Dew Point Transmitter

Operation

Controls

Operating Modes

Operating Sequence Description

Control Board Jumpers

Jumper Functions

Operator Interface

Front Panel LEDs

Front Panel Switches

Front Panel Operation

Program Mode Screens

Setup Mode Screens

Alarm & Service Mode

Heater and Temperature Alarms

Optional Device Alarms

Test Mode

Test Mode Screens

Start-up

Controller Settings

Initial Pressurization

Energizing the Dryer

Bringing the Dryer On-line

Operational Check Points

Loss of Power

Power Recovery

Using the RS-232 Port

Operation

Maintenance

Desiccant Replacement

Purge Mufflers

Pilot Air Filter Element Replacement

Dew Point Analyzer Filter (optional)

Troubleshooting

Power and Pressure Issues

Temperature and Dew Point Alarms

Operational Alarms

P&ID Schematic - Models 500 through 600

Sequence of Operation (Models 500 through 600)

P&ID Schematic - Models 750 through 4300

Sequence of Operation (Model 750 through 4300)

Replacement Parts

Models 500 through 600

Models 750 through 1800

Models 2200 through 2600

Models 3200 through 4300

Warranty

Related product manuals