Gardner Denver RNC150 User Manual

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REFRIGERATED

TYPE

COMPRESSED

AIR DRYERS

INSTRUCTION MANUAL

RNC Series

Models: RNC100, RNC125, RNC150, RNC200,

RNC250, RNC300, RNC400, RNC500,

RNC600, RNC750

5002737 Rev. J 02/17

18-2-670 RNC100-750 New Platform 1st Edition

For Sales and Service: (800) 883-2477

Or visit Sales and Service at www.gardnerdenverproducts.com

Table of Contents

Questions and Answers:

R
Roger HernandezAug 19, 2025
Why is the pressure drop so high across my Gardner Denver RNC150 Dehumidifier?
- M
  mmorrisonAug 19, 2025
  A high-pressure drop across your Gardner Denver Dehumidifier can stem from a few reasons. First, check the flow rate to ensure it's not excessive. Freezing of moisture in the evaporator due to a refrigeration system fault can also cause this issue. Lastly, a clogged separator or optional Oil Removal filter element could be the culprit; if so, replace the filter element(s).
A
Abigail LoveAug 21, 2025
How to troubleshoot a Gardner Denver RNC150 Dehumidifier refrigeration system that is not functioning properly?
- M
  Matthew DavisAug 21, 2025
  If the refrigeration system of your Gardner Denver Dehumidifier isn't working right, begin by checking the power to the unit. Ensure the ON/OFF switch is in the “ON” position and that the line disconnect switch is closed. Inspect fuses and breakers for continuity. Have an electrician examine the wiring for any faults or loose terminals. Also, check if ambient conditions are within the specified minimum and maximum temperature ranges. For air-cooled models, ensure the condenser fins are clean and that there is free airflow across the condenser. If the problem continues, further assistance is required.
M
Matthew OneillAug 27, 2025
What causes a high pressure drop across my Gardner Denver RNC150?
- D
  Daniel MillerAug 27, 2025
  A high pressure drop across your Gardner Denver Dehumidifier could stem from a few reasons. First, check the flow rate to ensure there isn't excessive air flow. Another potential cause is the freezing of moisture in the evaporator due to a refrigeration system fault. Lastly, the separator or optional oil removal filter element might be clogged, necessitating replacement of the filter element(s).
M
Martin JohnsonAug 30, 2025
What to do if the refrigeration system is not functioning properly in my Gardner Denver RNC150 Dehumidifier?
- S
  Sarah WilliamsAug 30, 2025
  If the refrigeration system of your Gardner Denver Dehumidifier isn't working correctly, begin by checking the power supply to the unit. If the power light is off, ensure the unit is receiving power. If the compressor light is off, turn the switch to the “ON” position. If the refrigeration compressor cycles on and off, close the disconnect switch. Check for continuity and have an electrician inspect the electrical connections. Also, verify the minimum and maximum temperature ranges, and clean the condenser, ensuring free airflow. If the problem continues, further assistance is required.
K
Katie AndersonSep 2, 2025
Why is the dew point indicator in the red area on my Gardner Denver RNC150?
- J
  Johnny LewisSep 3, 2025
  If the dew point indicator on your Gardner Denver Dehumidifier is in the red area, it could be due to the dryer being overloaded, resulting in a high air outlet temperature. It may also be because the refrigeration system is not functioning properly, also leading to a high air outlet temperature. If the dryer is running with no load, the light will go out when air flow is established.
F
fergusonnicholasSep 12, 2025
Why is there a high pressure drop across my Gardner Denver RNC150?
- R
  Robert SmithSep 12, 2025
  A high pressure drop across your Gardner Denver Dehumidifier can be due to several reasons. First, check the flow rate to ensure there isn't excessive airflow. If moisture is freezing in the evaporator due to a refrigeration system fault, see section D (not provided). Lastly, the separator or optional Oil Removal filter element might be clogged; replace the filter element(s) in this case.

Gardner Denver RNC150 Specifications

General

Brand	Gardner Denver
Model	RNC150
Category	Dehumidifier
Language	English

Summary

Installation Guide

Piping Connections

Guidance on connecting air inlet, outlet, and water lines for proper function.

Electrical Connections

Instructions for safely connecting the dryer to the power supply.

Operation Procedures

Operating Conditions

Specifies the minimum and maximum operating parameters for the dryer.

Start-up Procedure

Step-by-step guide for safely starting the dryer unit.

I-Controller Level 4 Operation

Specific operation details for models with the I-Controller Level 4.

Ethernet Feature Usage

Guide to connecting and monitoring the dryer via Ethernet/Web Interface.

Maintenance Procedures

Separator/Filter Element Service

Instructions for replacing moisture separator and oil removal filter elements.

Troubleshooting Guide

I-Controller Level 1 & 2 Issues

Common symptoms and corrective actions for I-Controller Level 1 & 2.

I-Controller Level 4 Issues

Common symptoms and corrective actions for I-Controller Level 4.

Reference Information

Dryer Alarm and Warning Codes

Table listing alarm conditions, triggers, and actions.

Wiring Diagrams

I-Controller Level 1 Wiring

Wiring diagram for I-Controller Level 1, Model 100.

I-Controller Level 2 Wiring (Models 100-150)

Wiring diagram for I-Controller Level 2, Models 100-150.

I-Controller Level 2 Wiring (Models 200-600)

Wiring diagram for I-Controller Level 2, Models 200-600.

I-Controller Level 2 Wiring (Model 750)

I-Controller Level 4 Wiring (Models 200-600)

I-Controller Level 4 Wiring (Model 750)

Replacement Parts

Parts List: Models RNC100-150

Parts List: Models RNC200-750 (Air-Cooled)

Parts List: Models RNC200-750 (Water-Cooled)

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