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HANKISON H Series - User Manual

HANKISON H Series
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1
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H
REFRIGERATED
TYPE
COMPRESSED
AIR DRYERS
H Series
7610.719.3B 73/06
Contents
GENERAL SAFETY INFORMATION ............................... 2
RECEIVING, STORING, MOVING, UNPACKING
1.0 DESCRIPTION........................................................... 3
2.0 INSTALLATION ......................................................... 4
2.1 Location .............................................................. 4
2.2 Position in the compressed air system ............... 4
2.3 Mounting ............................................................. 4
2.4 Piping .................................................................. 4
2.5 Electrical ............................................................. 4
2.6 Air-Cooled Models .............................................. 5
2.7 Compressor tiedown nuts -
7 1/2 and 10 horsepower units only .................... 5
3.0 OPERATION ............................................................... 6
3.1 Start-up and Shut down Procedures................... 6
3.2 Operational Sequence ........................................ 8
3.3 Fault Conditions .................................................. 10
3.4 Lights and Gauges.............................................. 10
3.5 Operational Check Points ................................... 10
4.0 MAINTENANCE.......................................................... 11
4.1 Separator/Filter Sleeve Replacement ................. 11
4.2 Air-Cooled Condenser - Special Instructions ...... 12
4.3 Water-Cooled Condenser - Special Instructions 12
Cooling Water Requirements ..................................... 15
4.4 Condensate Drains - Pneumatically Operated.... 16
4.5 Condensate Drains - Electrically Operated ......... 17
TROUBLE SHOOTING ..................................................... 18
WARRANTY ..................................................................... 20
SERVICE DEPARTMENT: (724) 746-1100
INSTRUCTION MANUAL
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Table of Contents

Questions and Answers

  • E
    Eric FernandezSep 5, 2025
    What causes a HANKISON Dehumidifier compressor to not unload?
    • J
      Jason JohnsonSep 5, 2025
      If the HANKISON Dehumidifier compressor will not unload, it could be due to several reasons. The unloader solenoid might be stuck, so attempt to repair it. The unloader solenoid coil could be defective, requiring replacement. The hot gas by-pass valve might be set too high or sticking, so reset or repair it. A faulty low-pressure transducer could also be the cause, so check the pressure reading and calibrate or replace the transducer.
  • A
    Angela ClarkNov 20, 2025
    Why does my HANKISON Dehumidifier compressor stop with "HIGH REFRIG PRESS" error?
    • V
      Victoria CaseyNov 20, 2025
      If the HANKISON Dehumidifier compressor stops due to high head pressure, which the system reads as "HIGH REFRIG PRESS", several issues could be the cause. It could be due to a faulty high-pressure transducer (PT200), which may require calibration or replacement. Excess refrigerant can cause this, so reclaim any excess. Air in the refrigeration system can also cause this, so check for leaks and recharge the unit, properly disposing of the old refrigerant. An air load on the unit during start-up can cause this, so take the air load off the unit during start-up. For water-cooled units, ensure sufficient water flow through the condenser by adjusting the water regulating valve, cleaning the water strainer, increasing the water main size to the condenser, fully opening the discharge shutoff valv...
  • C
    Christopher BellSep 18, 2025
    What to do if HANKISON H Series Dehumidifier shows "DRAIN # HI LEVEL"?
    • J
      Joshua MeyerSep 19, 2025
      If there is a high condensate level in the drains, indicated by "DRAIN # HI LEVEL" on your HANKISON Dehumidifier, it could be due to an incorrect setting on the drain valve, the drain valve not operating properly, or a defective float switch. Try increasing the drain open time or decreasing the time between openings. Repair or replace the drain valve if it's not operating properly. Check and replace the float switch if it's defective.
  • A
    Alison JacobsSep 17, 2025
    What does "LOW EVAP AIR TEMP" mean for HANKISON Dehumidifier?
    • J
      Jared RollinsSep 17, 2025
      If the air temperature in the evaporator is low, indicated by "LOW EVAP AIR TEMP" on your HANKISON Dehumidifier, it could be due to low suction pressure, an incorrect superheat setting on the TXV, or a defective temperature sensor (TT2). Reset the hot gas valve to the factory setting. Adjust the superheat to 3-6°F/1.7-3.3°C. Check and replace the temperature sensor if necessary.
  • R
    Ronald SalinasSep 15, 2025
    What does "HI INLET AIR TEMP" mean on my HANKISON H Series Dehumidifier?
    • S
      Sandra GonzalezSep 15, 2025
      If the inlet air temperature to your HANKISON Dehumidifier is high, indicated by "HI INLET AIR TEMP", it could be due to the unit being overloaded or a defective temperature sensor (TT1). Check that the inlet air temperature is below 120°F/49°C. If the temperature is within range, check and replace the temperature sensor.
  • R
    romeroandreaSep 12, 2025
    What causes low crankcase oil level in HANKISON Dehumidifier?
    • C
      Connie WoodSep 12, 2025
      If the crankcase oil level is low in your HANKISON Dehumidifier, it could be due to a clogged oil return screen or a Freon leak. Start by cleaning the oil return screen. Then, check for and repair any Freon leaks.
  • R
    rodgersianSep 10, 2025
    Why is my HANKISON Dehumidifier compressor so cold?
    • R
      Ruben FitzgeraldSep 12, 2025
      If the compressor in your HANKISON Dehumidifier is cold, with cylinders and the crankcase sweating, it could be due to low suction pressure, a defective or improperly set expansion valve, a defective or improperly set liquid injection valve, or a restricted suction line filter. Try resetting the hot gas valve to the factory set point. Also, reset the expansion valve to 3-6°F/1.7-3.3°C superheat and the liquid injection valve to 65°F/18.3°C return gas temperature at no load. Finally, check for a pressure drop across the suction line filter and replace the filter elements if necessary.
  • A
    Angela LewisSep 8, 2025
    Why is there rapid unloader cycling in my HANKISON Dehumidifier?
    • V
      Veronica ThomasSep 8, 2025
      If the HANKISON Dehumidifier experiences rapid unloader cycling, it could be due to excessive fluctuation in suction pressure, a fluctuating system load, or the hot gas valve being set too high. To address this, check the hot gas valve set point and stabilize the load. You may also need to return the valve to its factory set point.
  • S
    Steven JohnsonSep 6, 2025
    What to do if HANKISON Dehumidifier compressor will not load?
    • T
      Tammy BowenSep 6, 2025
      If the HANKISON Dehumidifier compressor will not load, it could be due to the unloader solenoid being stuck open, so reset or repair it. Another potential cause is a faulty low-pressure transducer, so check the pressure reading and calibrate or replace the transducer.
  • J
    Julie GonzalezAug 22, 2025
    What to do if my HANKISON Dehumidifier compressor stops due to "LOW REFRIG PRESS"?
    • B
      Benjamin MedinaAug 23, 2025
      If your HANKISON Dehumidifier compressor stops due to low suction pressure, indicated by "LOW REFRIG PRESS", it could be due to several reasons. A low refrigerant charge is a possibility, so check for leaks and add refrigerant as needed. The suction pressure setting might be incorrect, so adjust the hot gas by-pass valve and check the technical data for the proper setting. The low-pressure switch setting could also be incorrect, so check and repair it. Other potential causes include a hot gas valve sticking, a faulty low-pressure transducer (PT100) needing calibration or replacement, a defective CPU or component module needing replacement, or the refrigerant compressor not unloading properly, which would require checking the unloader mechanism and replacing it if necessary.

Summary

General Safety Information

Receiving, Storing, Moving, Unpacking

Procedures for receiving, storing, and unpacking the dryer, including checks for loss or damage.

1.0 Description

Function

Explains how refrigerated dryers reduce moisture by cooling compressed air and separating liquid.

Operation

Details the compressed air flow through the dryer, including precooling and reheating stages.

2.0 Installation

2.1 Location

Guidance on selecting a suitable installation location based on ventilation, ambient temperature, and access.

2.2 Position in the compressed air system

Recommends placing the dryer downstream of the compressor receiver, before main distribution lines.

2.3 Mounting

Instructions for permanently mounting the dryer to a level solid floor using provided base holes.

2.4 Piping

Covers air inlet/outlet, condensate drain, and water-cooled model piping connections.

2.5 Electrical

Electrical connection requirements, including disconnect switch and wiring precautions.

2.6 Air-Cooled Models

Specific installation guidance for air-cooled models, including integral and remote condensers.

2.7 Compressor shipping spacers - 7 1;2 and 10 horsepower units only

Procedure for removing shipping spacers and installing rubber spacers to prevent compressor damage.

3.0 Operation

3.1 Start-up and Shut down Procedures

Detailed steps for pre-start-up checks, starting the dryer, and standard/maintenance shutdown.

Control Panel Functions

Explanation of the operator interface, function buttons, and display messages.

Operator Interface Display

Table detailing status, conditions, pressures, temperatures, and fault messages displayed on the operator interface.

3.2 Operating Sequence

Step-by-step description of the dryer's operational sequence from energizing to normal running or standby.

3.3 Fault Conditions

Lists and explains various fault conditions, including compressor protection and informational faults.

3.4 Light and Gauges

Describes the function of the power-on indicator, general alarm light, and air inlet pressure gauge.

3.5 Operational Check Points

A checklist of critical checks to perform after starting the dryer to ensure proper operation.

4.0 Maintenance

4.1 Separator;Filter Sleeve Replacement

Instructions on when and how to replace separator/filter sleeves, including disassembly and reassembly.

4.2 Air-Cooled Refrigerant Condensers - Special Instructions

Guidance on cleaning and maintaining air-cooled condensers, including operational deficiencies.

4.3 Water-Cooled Refrigerant Condenser - Special Instructions (Cleanable shell and tube type)

Instructions for cleaning and maintaining water-cooled condensers, including operational deficiencies.

Water-Cooled Refrigerant Condenser - Special Instructions (Continued)

Details water treatment recommendations and chemical/mechanical cleaning procedures for water-cooled condensers.

Water-Cooled Refrigerant Condenser - Special Instructions (Continued)

Covers mechanical cleaning procedures, disassembly, and reassembly of water-cooled condensers.

4.4 Condensate Drains - Pneumatically Operated

Monthly flushing and annual servicing procedures for pneumatically operated condensate drains.

4.5 Condensate drains - Electrically Operated

Monthly flushing and periodic cleaning of internal strainers for electrically operated condensate drains.

Trouble Shooting Guide

Compressor stopped because of high head pressure HIGH REFRIG PRESS

Identifies causes and corrective actions for compressor stopping due to high head pressure.

Compressor stopped because low suction pressure LOW REFRIG PRESS

Identifies causes and corrective actions for compressor stopping due to low suction pressure.

Compressor stopped because of low oil pressure LOW OIL PRESSURE

Identifies causes and corrective actions for compressor stopping due to low oil pressure.

Compressor stopped because solid state motor protector open SSMP

Identifies causes and corrective actions for compressor stopping due to solid state motor protector opening.

Compressor stopped because motor starter protector open MTR STARTER

Identifies causes and corrective actions for compressor stopping due to motor starter protector opening.

High air temperature leaving the evaporator HIGH EVAP AIR TEMP (optional)

Identifies causes and corrective actions for high evaporator air temperature.

Compressor will not start

Lists potential causes and corrective actions when the compressor fails to start.

Compressor cycles intermittently in standby mode

Identifies causes and corrective actions for intermittent compressor cycling in standby mode.

Low refrigerant head pressure

Identifies causes and corrective actions for low refrigerant head pressure.

System Noise

Identifies causes and corrective actions for various system noise issues.

Compressor will not unload

Identifies causes and corrective actions for the compressor failing to unload.

Compressor will not load

Identifies causes and corrective actions for the compressor failing to load.

Rapid Unloader Cycling

Identifies causes and corrective actions for rapid cycling of the unloader.

Cold Compressor (Cylinders and Crankcase Sweating)

Identifies causes for cold compressor sweating and potential remedies.

Compressor Flooding

Identifies causes for compressor flooding and potential remedies.

Low Crankcase Oil Level

Identifies causes and corrective actions for low crankcase oil level.

High Crankcase Temperature (should be 100°F;38°C to 130°F;55°C)

Identifies causes and corrective actions for high crankcase temperature.

High inlet air temperature to unit HI INLET AIR TEMP (optional)

Identifies causes and corrective actions for high inlet air temperature.

Low air temperature in evaporator LOW EVAP AIR TEMP (optional)

Identifies causes and corrective actions for low evaporator air temperature.

High condensate level in drains DRAIN # HI LEVEL (optional)

Identifies causes and corrective actions for high condensate levels in drains.

Low water pressure entering condenser (water-cooled units) LOW WATER PRESS (optional)

Identifies causes and corrective actions for low water pressure entering the condenser.

High pressure drop across dryer air side CHECK SEPARATOR (optional)

Identifies causes and corrective actions for high pressure drop across the dryer air side.

Warranty

HANKISON H Series Specifications

General IconGeneral
BrandHANKISON
ModelH Series
CategoryDehumidifier
LanguageEnglish

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