Quincy Compressor QPNC 25

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ENGLISH

Cod. 2200780113 01 - Edition 10/2014 - 1

INSTRUCTION AND MAINTENANCE MANUAL

DRYERS

QPNC 10 to QPNC 50

CONTENTS

PART A: INFORMATION FOR THE USER

11.0 UNPACKING

1.0 GENERAL CHARACTERISTICS

12.0 INSTALLATION

2.0 INTENDED USE

13.0 DIMENSIONS AND TECHNICAL DATA

3.0 OPERATION

14.0 MACHINE ILLUSTRATION

4.0 GENERAL SAFETY STANDARDS

15.0 PARTIAL ROUTINE MAINTENANCE

5.0 DESCRIPTION OF DANGER SIGNALS

16.0 SCRAPPING THE DRYERS

6.0 DANGER ZONES

17.0 TROUBLE-SHOOTING AND EMERGENCY REMEDIES

7.0 SAFETY DEVICES

PART B: INFORMATION RESERVED FOR TECHNICALLY SKILLED

PERSONNEL

8.0 POSITION OF PLATES

18.0 STARTING UP

9.0 DRYERS ROOM

10.0 TRANSPORT AND HANDLING

ATTENTION: THERE IS A COPY OF THE WIRING DIAGRAM INSIDE THE ELECTRIC PANEL

ADDRESSES OF ASSISTANCE CENTRES

In the event of breakdown or malfunction of the dryer, switch it off and do not tamper with it. If repairs are needed, apply only to a technical

assistance centre approved by the manufacturer and insist on the use of original spare parts. Failure to comply with the above may

endanger the safety of the machine.

INTRODUCTION

Keep this manual with care for future consultation; the use and maintenance manual is an integral part on the dryer. Read this

manual carefully before carrying out any operations on the dryer.

The installation of the dryer and all operations involving it must be performed in conformity with the regulations in force

concerning electric plants and personal safety.

Code

2200780113

Edit. 10/2014

READ THIS MANUAL CAREFULLY BEFORE CARRYING OUT ANY OPERATIONS ON THE DRYER.

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This document is an instruction and maintenance manual for a series of QPNC dryers, specifically models QPNC 10 to QPNC 50. It provides comprehensive information for both general users and technically skilled personnel.

Function Description

The QPNC dryer is a chilling machine designed for industrial compressed air drying. It operates on a direct expansion and dry evaporator principle. Compressed air to be dried is directed to a heat exchanger where water vapor condenses. The resulting condensate is collected in a separator and discharged externally via a steam trap. The refrigeration cycle involves a compressor, condenser, motor fan, evaporator, and expansion capillary tube. Gaseous refrigerant from the evaporator is drawn by the compressor, pumped to the condenser for condensation (assisted by the fan), then passes through a dewatering filter and expands through the capillary tube back to the evaporator, creating a cooling effect. A hot gas bypass valve regulates the refrigerating capacity to maintain a constant refrigerant pressure in the evaporator, ensuring the dew point never drops below 32°F (0°C) to prevent condensate from freezing. The dryer operates fully automatically and is factory-calibrated for a dew point of 39°F (4°C).

Important Technical Specifications

The manual provides detailed technical data for each model (QPNC 10, 15, 25, 35, 50), including:

Gross Weight: Ranging from 57.3 lb (26 kg) for QPNC 10 to 75.0 lb (34 kg) for QPNC 35 and 50.
Refrigerant (R134a) Charge: From 0.397 lb (0.180 kg) for QPNC 10 to 1.047 lb (0.475 kg) for QPNC 50.
Nominal Power (Compressor): Varies by model and voltage (230/115-60Hz, 230-60Hz, 115-60Hz), ranging from 0.161 HP (120 W) to 0.441 HP (329 W).
Nominal Power (Motor Fan): Consistent at 0.040 HP (30 W) across all models and voltages.
Nominal Power (Total): Ranges from 0.201 HP (150 W) to 0.481 HP (359 W).
Maximum Working Pressure: 232 psi (16 bar) for all models.
Dimensions (L x W x H): All models share the same dimensions: 13.78 in (350 mm) L, 20.09 in (510 mm) W, 19.05 in (484 mm) H.
Refrigerant Gas: R-134a, with a GWP100 of 1300.
NPT Connections (A & B): 1/2-14 Male for all models.
Operating Conditions:
- Min. room temperature: +34°F (+1°C) compulsory.
- Max. room temperature: +115°F (+46°C) compulsory.
- Max. temperature of incoming air: +131°F (+55°C).
- Min. temperature of incoming air: +34°F (+1°C).
Reference Conditions: Ambient temperature +100°F (+38°C), Inlet air temperature +100°F (+38°C), Working pressure 102 psi (7 bar), Dew point in pressure +39°F (+4°C).

Usage Features

Intended Use: Designed exclusively for drying compressed air for industrial use. Not suitable for premises with fire/explosion risk or where hazardous substances are released. Cannot be used to produce breathable air or for direct contact with foodstuffs unless the compressed air is filtered by a suitable filtering system.
Installation: Requires an even, industrial-type floor. The room must be spacious, dry, well-ventilated, and dust-free. Sufficient space around the machine is needed for maintenance. The operator must have a clear view of the machine from the control panel.
Electrical Connection: Requires checking supply voltage against the machine data plate, ensuring good line leads and an efficient earth lead. An automatic cut-out device with a differential device is required upstream.
Compressed Air Network Connection: A manual interception valve should be fitted between the dryer and the compressed air network for isolation during maintenance. Condensate drainage must comply with local regulations.
Starting and Stopping: The system should be started before the air compressor and stopped after it. If the dryer is switched off, a 5-minute wait is required before restarting for pressure balancing.
Control Panel: Features a digital controller with icons for alarms, power ON, fan ON, PDP temperature, unit °C or °F, and alarm LEDs.
Digital Control Alarms: The manual details various alarms (P1 for fan control probe failure, P2 for PDP temp probe failure, H2 for high PDP call for service, L2 for low PDP call for service, EE for internal EPROM errors) with possible root causes and observations.

Maintenance Features

Safety Precautions: All maintenance work requires switching off the electric power supply and discharging residual pressure. Work on the electric plant must be done by professionally skilled personnel. Protective guards must not be removed without proper safety measures.
Maintenance Schedule:
- Each Week: Clean the filter of the steam trap.
- Each Month: Clean the condenser fins to remove dust.
Cleaning the Automatic Condenswater Discharger Filter: Involves closing the cock, releasing pressure via the "TEST" pushbutton on the steam trap, switching off the machine, turning on the supply automatic differential switch, removing panels, stopper, and filter, then cleaning the filter with a jet of air from inside to outside before reassembling.
Cleaning the Condenser: Monthly cleaning involves switching off the machine, turning on the supply automatic differential switch, removing panels, and cleaning condenser fins with compressed air (no water or solvents).
SE Alarm: After 2000 hours, the controller issues an "SE" warning, indicating due maintenance. The manual provides a 6-step procedure to reset this warning.
Troubleshooting: A dedicated section lists common faults (e.g., no compressed air, condensate in pipings, hot compressor head, motor overload, motor hums but doesn't start, noisy compressor) with possible causes and observations/remedies. Operations marked with "■■" must be carried out by manufacturer-approved skilled personnel.
Scrapping: If the machine is to be scrapped, it must be dismantled into parts of the same material and disposed of according to local regulations, with strict adherence to regulations for disposing of old oil, insulating foam, and other polluting materials.