HANKISON HPRP 750 - User Manual

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REFRIGERATED

TYPE

COMPRESSED

AIR DRYERS

CONTENTS

GENERAL SAFETY INFORMATION .........................2

RECEIVING, MOVING, AND UNPACKING ................2

1.0 INSTALLATION ..................................................3

2.0 OPERATION.......................................................5

3.0 MAINTENANCE .................................................8

SIZING ......................................................................8

ENGINEERING DATA (Models 100-250)...................9

ENGINEERING DATA (Models 300-750)...................10

WIRING DIAGRAM (Models 100, 125 & 150) ...........11

WIRING DIAGRAM (Models 200-600 - 460 VAC) .....12

WIRING DIAGRAM (Model 750 - 460 VAC) .............. 13

DIMENSIONS / WEIGHTS ........................................ 14

TROUBLESHOOTING GUIDE (Models 100-150) .....15

TROUBLESHOOTING GUIDE (Models 200-750) .....16

PARTS LIST ..............................................................17

WARRANTY..............................................................20

INSTRUCTION MANUAL

HPRplus Series with ColdWave™ Technology

Models: HPRP 100, 125, 150, 200, 250, 300,

400, 500, 600, 750

5002730 Rev. A 5/06

18-2-675 5th Edition

Internal Use Only

060519

SERVICE DEPARTMENT: (724) 746-1100

Table of Contents

Questions and Answers

D
Dawn LewisAug 25, 2025
What causes a high pressure drop across my HANKISON HPRP 750 Dehumidifier?
- W
  wellsderrickAug 26, 2025
  A high pressure drop across your HANKISON Dehumidifier can stem from a few potential issues. Excessive airflow could be the cause, so check the flow rate. Another possibility is the freezing of moisture in the evaporator due to a refrigeration system fault; in this case, consult section D. Lastly, a clogged separator filter element can lead to a pressure drop, so replace the filter element.
S
Samantha HuberAug 31, 2025
What does it mean if the dew point indicator is in the red area on my HANKISON HPRP 750?
- T
  Tara DiazAug 31, 2025
  If the dew point indicator on your HANKISON Dehumidifier is in the red area, this suggests that the dryer is overloaded, leading to a high air outlet temperature. Refer to section A 7. Alternatively, the refrigeration system might not be functioning properly, also resulting in a high air outlet temperature; in this case, consult section D.
J
John WolfNov 8, 2025
What to do if there is water downstream of my HANKISON HPRP 750?
- J
  Joseph KingNov 8, 2025
  If you notice water downstream of your HANKISON Dehumidifier, several factors could be responsible. It might be due to residual free moisture in the pipelines; in this case, blow out the system with dry air. Check the valve positions because the air bypass system might be open. Ensure that the inlet and outlet connections are correctly connected. If air lines downstream are exposed to temperatures below the dew point, insulate or heat trace them, or use dry air to lower the dew point. Excessive free moisture at the dryer inlet might be the cause, so install a separator ahead of the dryer. Condensate drainage issues can also lead to this problem; ensure the drain mechanism isn't clogged or inoperative, the drain line isn't restricted or frozen, and, for electric drains, the timer is set for...
H
Holly HaynesNov 15, 2025
Why is my HANKISON HPRP 750 Dehumidifier's refrigeration system not functioning properly?
- T
  Tracy BrownNov 16, 2025
  Several issues can cause the refrigeration system of your HANKISON Dehumidifier to malfunction. First, check if the power is on. If the power light is off, ensure the unit is receiving power. Verify that the line disconnect switch is closed and inspect for blown fuses or open breakers, checking for continuity. Faulty wiring or loose terminals can also be culprits, so have an electrician inspect the electrical connections. High or low ambient conditions might affect the system; check the minimum and maximum temperature ranges. If your system is air-cooled, inspect for dirty or clogged condenser fins and ensure there's no obstruction to airflow across the condenser. Also, check the fan motor or fan control switch. If the issue persists after cleaning the condenser and ensuring free airflow, ...

HANKISON HPRP 750 Specifications

General

Brand	HANKISON
Model	HPRP 750
Category	Dehumidifier
Language	English

Summary

General Safety Information

Installation

Location

Proper placement considerations including clearances, ambient conditions, and altitude.

Operation

Minimum;Maximum Operating Conditions

Specifies pressure, temperature limits for inlet air and ambient conditions.

Start-up

Procedures for initiating operation for different model series.

Program Monitor

Interface for setting language, date, time, and operational schedules.

Manual Operation

Starting Dryer

Operating Check Points

Maintenance

Troubleshooting Guide (Models 100-150)

Troubleshooting Guide (Models 200-750)

Warranty

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