Stulz DRH-04 Instructions Manual
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Stulz DRH-04 Instructions Manual

Drh series gen2 energy efficient ultrasonic humidifier
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DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual
STULZ DRH Series GEN2
Energy Effi cient Ultrasonic Humidifi er
IOM
(March, 2013)
Installation, Operation & Maintenance
READ AND SAVE THESE INSTRUCTIONS
LIRE ET CONSERVER CES INSTRUCTIONS
Models:
DRH-04
DRH-06
DRH-08
DRH-16
Retrofi t & Conditioning
Humidifi cation
®

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  • Page 1 DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual READ AND SAVE THESE INSTRUCTIONS LIRE ET CONSERVER CES INSTRUCTIONS Retrofi t & Conditioning Humidifi cation STULZ DRH Series GEN2 Energy Effi cient Ultrasonic Humidifi er Models: DRH-04 DRH-08...
  • Page 2 No part of this document may be photocopied, reproduced, or translated into another language for use by anyone other than the owner of the equipment for which this manual is written without the prior written consent of Stulz Air Technology Systems, Inc. (STULZ).

  • Page 3: Table Of Contents

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual TABLE OF CONTENTS Introduction ........1-1 4.2.1 Air Filter ............4-3 4.2.2 Water Supply Strainer/Flow Regulator ..4-3 General ............1-1 4.2.3 Electrical Parts ...........4-3 Safety ............1-1 4.2.4 Float Switches ..........4-4 1.2.1 General ............1-1 4.2.5 Water Tank ..........4-5 1.2.2...

  • Page 4: Introduction

    STULZ DRH Series Ultrasonic Humidifi ers are de- signed as stand alone direct room humidifi ers. Any CAUTION use beyond this is deemed to be not intended. STULZ is not liable for any damage resulting from improper This unit must be installed according to local use.
  • Page 5 DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual NOTE CAUTION STULZ offers no warranty protection on humidifi cation systems using controls that are Never attempt to remove the mist guide cover not provided by STULZ. and/or the mist blow tubes while the humidifi - er is operating, or electrical shorts may result.

  • Page 6: Product Warranty

    Inc.’s obligation under this warranty is to repair or replace, at its option, free of charge to the customer, any part or parts which are determined by Stulz Air Technology Systems Inc. to be defective for a period of 24 months from date of shipment when a completed start-up form has been submitted to Stulz Air Technology Systems, Inc.

  • Page 7: Specifi Cations

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 1.4 Specifi cations Type DRH Series Ultrasonic Humidifi er Model DRH-04 DRH-06 DRH-08 DRH-16 Nebulizing capacity (lb/h) 17.6 Qty. of Ultrasonic nebulizers/unit Power source 48VDC Rated power consumption (W) Weight (lb) 19.8...

  • Page 8: General Design

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 1.5 General Design The DRH Ultrasonic Humidifi er directly atomizes water, producing a fi ne mist. The humidifi er incorporates high frequency nebulizers to produce ultrasonic waves, a fan to propel the mist out, and an automatic water supply mechanism to maintain the supply water at a constant level.

  • Page 9: Level Controller

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 1.6.13 Level Controller prevents mist from being formed. The microprocessor monitors the 48VDC to be within a range of voltages. The Level Controller is a microprocessor based If the voltage is out of range, the microprocessor will device located in the electric box that receives inputs not energize the Solid State Relay.

  • Page 10: Installation

    STULZ ships all equipment FOB factory. STULZ is not liable for any equipment damage while in transit. STULZ can assist in the claim fi ling process with the freight carrier. Should any such damage be present, notify the STULZ Product Support Group prior to attempting any repairs. Refer to Section 5.0 of this manual for instructions.

  • Page 11: Mounting/Placement

    Mounting/Placement STULZ ultrasonic humidifi ers are designed for mounting to a fl at surface. Ensure the base is capable of support- ing the weight of the unit. Weight estimates can be found on the installation drawing provided with your unit.

  • Page 12: Main Power/Control Wiring

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual NOTE The water supply piping must be non-corrosive stainless steel or poly tubing rated for use with de-ionized water. Prepare the water supply piping. The water supply piping should be equipped with a water supply valve for maintenance purposes (user provided) at a place as close as possible to the humidifi...

  • Page 13: Figure 5- Electrical Connections

    Connecting Humidifi er(s) to Control Box The table below indicates the correct electrical wire As a standard, STULZ GEN2 Ultrasonic humidifi ers sizing from the control box to the humidifi er power are equipped with a twist lock power connector cable for three different distances.

  • Page 14: Operation

    2. Open the water supply valve allowing water to fl ow to the humidifi er. 3. Perform a manual drain cycle to fl ush any particulates from the tank utilizing the system controller (see STULZ Ultra-Series controller IOM manual #OUU0078, Section 5.5.1.2). 4. Set the humidity setpoint to the desired humidity level.

  • Page 15: Precautions

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 3.4 Precautions Do not remove the air fi lter at the bottom of the humidifi er during operation. Do not block the outlet of the mist blow tubes; component failure could occur. Drain the water from the water tank for sanitary reasons if the unit is turned off for more than 3 days.

  • Page 16: Maintenance/Repairs

    When performing maintenance or repairs, care must be taken to ensure small parts such as screws will not be lost. Testing insulation resistance and dielectric withstand voltage should be avoided because the humidifi er incorporates sensitive electronic parts. When parts are replaced, genuine STULZ parts must be used. Contact STULZ Product Support for assistance. (March, 2013)

  • Page 17: Maintenance Items And Necessary Tools

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual Maintenance Items and Necessary Tools Item Cycle Description Necessary Tools Routine Maintenance Air fi lter cleaning. About once a week depending Phillips screwdriver Sect. 4.2.1 on the extent of contamination. The interval should be short- ened if environmental condi- tions are particularly dusty.

  • Page 18: Air Filter

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 4.2.1 Air Filter 1) Stop the humidifi er. 2) Loosen and remove the fi lter case mounting screws (2 Pcs.) at the lower front of the humidifi er. Photo 1 3) Pull out the fi...

  • Page 19: Float Switches

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 6) Remove the terminal connectors (3 Ea.) from the sides of the level control board. Photo 6 7) Slide the board out and ensure there is no discoloration, deformation or deterioration of the printed circuit. Photo 7 If any defects are found with the electrical parts, take necessary steps referring to Sect.

  • Page 20: Water Tank

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 4.2.5 Water Tank 1) Loosen the fan casing mounting screws (4 Pcs.) on the sides of the humidifi er and slide it up from the base. Photo 11 2) Turn the fan casing on it’s side. Remove the screw inside the casing (1 Pcs.) holding the air fl...

  • Page 21: Troubleshooting And Repair

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 4.3 Troubleshooting and Repair Should any failure occur, make the necessary repairs referring to the following tables. As a rule, power must be turned off when troubleshooting is performed but if it is absolutely necessary to troubleshoot when power is supplied, special attention must be paid to avoid electric shock and short-circuiting.
  • Page 22 If the humidifi er is operated for a long time with a deteriorated transducer, the nebulizer print plate may fail. The transducers should be replaced using the estimated lifetime of 10,000 to 15,000 hours as the point of reference. STULZ If the cause cannot be located through the above checking, please contact Product Support.

  • Page 23: Preparation For Repairs

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual Common Repairs/Parts Replacement When parts are replaced, refer to sections “4.4.1 Preparation for Repairs” and “4.4.2 Re-assembling”. 4.4.1 Preparation for Repairs (Removal of Water Tank) 1) Stop the humidifi er, set the power supply circuit breaker (main switch) to “Off”...

  • Page 24: Replacing The Temperature Sensor

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 4.4.3 Replacing the Temperature Sensor The temperature sensor is mounted to the front of the water tank. Referring to Section 4.4.1, “Preparation for Repairs” steps 1 - 5, place the water tank on a well lit work surface. Locate the sensor (see photo 22) and refer to section 4.4.3.1.

  • Page 25: Replacing A Transducer

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 4.4.4 Replacing a Transducer 1) Referring to Section 4.4.1, “Preparation for Repairs”, place the water tank on a well lit work surface. 2) To replace a transducer, remove the two transducer lead wires, (yellow and orange) from the nebulizer print plate.

  • Page 26: Replacing A Nebulizer Print Plate

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 4.4.5 Replacing a Nebulizer Print Plate 1) Referring to Section 4.4.1, “Preparation for Repairs”, place the water tank on a well lit work surface. 2) Using a 5.5 mm nut driver, remove the print plate mounting nuts (2 Pcs.) and remove the plate.
  • Page 27 DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual Note Ensure the elbow is facing the correct direction. 7) Install the new solenoid valve to the fl oat panel and re-install the pipe fi tting. Note Ensure the O-ring is not damaged. If it is damaged, replace it with a new one.

  • Page 28: Product Support Group

    STULZ within 30 days of the any other method than UPS ground the customer is purchase date. Spare part sales over 30 days old will responsible for the shipping charges.

  • Page 29: Drawings

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual DRAWINGS 6.1 Layout Drawing of Humidifi er (Covers Removed to Show Parts) Front Rear The bubble numbers called out in the drawings coincide with the item numbers listed below: Drain Stub- 1/8”...

  • Page 30: Electrical Circuit Diagrams

    DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual 6.2 Electrical Circuit Diagrams (March, 2013)
  • Page 31 DRH Series GEN2 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual (March, 2013)
  • Page 32 • China • India ® STULZ mission is to be the premier provider of STULZ Air Technology Systems, Inc. 1572 Tilco Drive, Frederick, Maryland 21704 energy effi cient temperature and humidity control Phone: 301.620.2033, Fax: 301.662.5487 solutions for mission critical applications.

This manual is also suitable for:

Drh-08Drh-06Drh-16

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