Quincy QPNC 150 - User Manual

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QPNC Series (75-250)

Non-Cycling

Parts/Instruction Manual

This manual contains important safety information and should be made available to

all personnel who operate and/or maintain this product. Carefully read this manual

before attempting to operate or perform maintenance on this equipment.

Manual No. 65504-2A

January 2007 Edition

Update: May 2009

Questions and Answers

N
Nicholas FowlerAug 5, 2025
What to do if my Quincy QPNC 150 Dehumidifier motor cuts out on overload?
- J
  jacksondennisAug 5, 2025
  If the motor cuts out on overload, it could be due to several reasons. First, the dryer might be operating outside of its specified range; in this case, verify the treated air's flow rate. Secondly, the dryer might be working under unfavorable conditions for an air-cooled condenser; make sure to clean the condenser. Finally, the cooling circuit could be malfunctioning due to an incorrect refrigerant charge; check for any refrigerant gas leaks.
V
Vincent LopezAug 9, 2025
Why is my Quincy QPNC 150 Dehumidifier compressor head so hot?
- R
  Randall WellsAug 9, 2025
  If the compressor head is very hot, exceeding 131 °F (55 °C), it could be due to a few reasons. The dryer might be operating outside its rated capacity, so check the flow rate of the treated air. Additionally, the dryer may be working under poor conditions for the air-cooled condenser, so you should clean the condenser. It's also possible that the cooling circuit isn't working correctly due to an incorrect refrigerant charge, in which case you should check for leaks of refrigerating gas.
S
Sandra GreenAug 13, 2025
What to do if my Quincy Dehumidifier compressor is very noisy?
- V
  Veronica HuffmanAug 13, 2025
  If the compressor is very noisy, it indicates trouble with the internal mechanical parts or with the valves. You should consider repairing or replacing the affected components.
K
Kimberly ParkerAug 17, 2025
What to do if my Quincy Dehumidifier motor hums and does not start?
- V
  Vicki GriffinAug 18, 2025
  If the motor hums but doesn't start, it could be due to several reasons. First, the line voltage might be too low, in which case you should contact the electric power company. Second, the machine may have been switched off and on again too quickly, without allowing enough time for pressure balancing; wait a few minutes before restarting it. Lastly, the motor's starting system could be defective; check the running and starting relays and condensers, if installed.
C
Catherine WrightAug 21, 2025
What to do if my Quincy QPNC 150 machine stopped and does not restart?
- C
  Christopher RodriguezAug 22, 2025
  If the machine (compressor) has stopped and won't restart, it could be due to overload protection or a burned-out compressor motor. In the first case, refer to sections B2, B3, and C3 for remedies. In the second case, replace the compressor.
M
Michael JonesAug 27, 2025
Why is there condensate in the pipings of my Quincy QPNC 150 Dehumidifier?
- C
  Carly GoldenAug 27, 2025
  The presence of condensate in the pipings may be due to several factors. The condensate separator might not be working correctly; in this case, clean the condensate drain filter. The dryer could be operating outside its specified range; check the flow rate of treated air. Also, the dryer might be working under bad conditions for the air-cooled condenser; make sure to clean the condenser.
C
Christopher SpearsAug 31, 2025
How to fix a Quincy QPNC 150 with no compressed air passing through the outlet?
- M
  Mark SmithAug 31, 2025
  If no compressed air passes through the dryer outlet, the pipes may be frozen inside. This could be because the hot gas bypass valve is broken or out of calibration, or because the room temperature is too low, causing the evaporator's piping to be obstructed with ice.

Summary

General Information

Safety Messages

Crucial safety information, warnings, and cautions for operation.

Safety Zones, Devices and Decals

Safety Instructions

General safety guidelines for operation and maintenance.

Installation Instructions

Electrical Connection

Procedures and requirements for connecting the dryer to power.

Compressed Air System Connection

How to connect the dryer to the air supply network.

Specifications and General Layout

Start-Up and Operation

Preliminary Controls

Starting and Stopping Procedures

Steps for safely starting and stopping the dryer.

Pressure Discharge Procedure

Controls and Operation

Maintenance

Maintenance Schedule

Troubleshooting Guide

QPNC-75 (115 V) Wiring Diagram

QPNC-75 (230 V) Wiring Diagram

QPNC-100;125 (115 V) Wiring Diagram

QPNC-100;125 (230 V) Wiring Diagram

QPNC-150;175;200;250 Wiring Diagram

Summary

General Information

Safety Messages

Crucial safety information, warnings, and cautions for operation.

Safety Zones, Devices and Decals

Safety Instructions

General safety guidelines for operation and maintenance.

Installation Instructions

Electrical Connection

Procedures and requirements for connecting the dryer to power.

Compressed Air System Connection

How to connect the dryer to the air supply network.

Specifications and General Layout

Start-Up and Operation

Preliminary Controls

Starting and Stopping Procedures

Steps for safely starting and stopping the dryer.

Pressure Discharge Procedure

Controls and Operation

Maintenance

Maintenance Schedule

Troubleshooting Guide

QPNC-75 (115 V) Wiring Diagram

QPNC-75 (230 V) Wiring Diagram

QPNC-100;125 (115 V) Wiring Diagram

QPNC-100;125 (230 V) Wiring Diagram

QPNC-150;175;200;250 Wiring Diagram

Quincy QPNC 150 Specifications

General

Brand	Quincy
Model	QPNC 150
Category	Dehumidifier
Language	English

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