Aprilaire 550 Owner's Manual
  1. Manuals
  2. Brands
  3. Aprilaire Manuals
  4. Humidifier
  5. 550
  6. Owner's manual

Aprilaire 550 Owner's Manual

Automatic humidifiers
Hide thumbs Also See for 550:
Table of Contents

Advertisement

Quick Links

See also: Service Manual , Owner's Manual
Automatic Humidifiers
Owner's Manual
For Models 400, 550, 600 & 700
Includes Safety & Operating Instructions
and Warranty Information
READ AND SAVE THESE INSTRUCTIONS

Advertisement

Table of Contents
loading

Related Manuals for Aprilaire 550

Summary of Contents for Aprilaire 550

  • Page 1 Automatic Humidifiers Owner’s Manual For Models 400, 550, 600 & 700 Includes Safety & Operating Instructions and Warranty Information READ AND SAVE THESE INSTRUCTIONS...

  • Page 2: Table Of Contents

    Disconnect power and shut off water supply before servicing. Sudden operation may cause personal injury or property damage. Turn the CAUTION Aprilaire Humidifier Control to “OFF” or lowest setting before servicing. TABLE OF CONTENTS INTRODUCTION Thank you for your recent Aprilaire ®...

  • Page 3: Principle Of Operation

    The operating principle of your Aprilaire humidifier provides all of these advantages. Here, briefly, is the method: The Aprilaire Humidifier is installed to operate in conjunction with the furnace blower. When the Aprilaire Humidifier Control calls for humidity and the blower is operating, water flows to the distribution tray located at the top of the unit.
  • Page 4 Aprilaire Humidifier under most operating conditions, has this humidifying capacity. Trouble-free performance and minimum maintenance are assured by the design features of the Aprilaire Humidifier. All unit housing parts that come in contact with water are non-metal and will never rust or corrode. Neither heat nor water will affect them under normal operating conditions.
  • Page 5 Control – Automatic and Manual. An explanation of both modes follows: Automatic Mode: (Manual Mode-see pg 5) Your Aprilaire Humidifier Control is installed in the cold air return duct. During the first heating season, your Humidifier Control needs to be set initially to match your home’s condition.

  • Page 6: Automatic Mode

    Aprilaire Humidifier. AUTOMATIC MODE Your Aprilaire Automatic Humidifier, is a high precision system that will accurately maintain the relative humidity in your home to a maximum of 45% RH and a minimum of 10% RH. For every 1° change in outdoor...

  • Page 7: Manual Mode

    “5” on the dial range, then the RH in your home is 35%. Manual Mode: (Automatic Mode – see pg 3) Your Aprilaire Humidifier Control is installed in the cold air return. It is important to anticipate a drop in outdoor temperature and reduce the setting accordingly to avoid excessive condensation.

  • Page 8: Manual Mode

    The furnace blower motor must be operating and the furnace calling for heat for the Aprilaire Humidifier to function. Note: Turning the knob to “Test/Reset” resets the “Change Water Panel” internal timer. After the...

  • Page 9: Effect Of Water Characteristics

    On occasion, indoor moisture producing activities such as clothes drying, cooking, showers, etc., may raise the relative humidity level higher than it should be, even though the Aprilaire Humidifier is not operating. Telltale indications, again, are condensation or frost on cold surfaces such as windows, doors, walls, etc.

  • Page 10: Annual Maintenance

    (during operation only) when it is time to change your Water Panel. See individual model instructions for additional maintenance. To purchase a new Water Panel: • Call the installer of your Aprilaire Humidifier. This information is often found on your equipment. • Call your heating and air conditioning dealer.

  • Page 11: Periodic Preventative Maintenance

    TABLE OF CONTENTS VIII. PERIODIC PREVENTATIVE MAINTENANCE NOTE: Periodic inspection and preventative maintenance of your total heating system is important for efficient and safe operation. Your heating contractor should include humidifier service at the same time. All models are equipped with an in-line water strainer and orifice as shown below.

  • Page 12: Maintenance Instructions

    8. Inspect the plastic feed tube (2) by gently flexing it and looking for cracks or signs of wear. Replace tube if it is cracked, brittle, or has been damaged. 9. Slide a new Aprilaire No. 45 water panel (7) into the scale control insert/float chamber (8). Snap the distribution tray (5) back on the scale control insert (8).
  • Page 13 Replace the Water Panel evaporator (Stock No. 35) and with a new Genuine Aprilaire Water Panel. Slide the Water Panel back into the scale control insert with the colored spot up and snap the distribution tray back into place.

  • Page 14: Model 700

    Insert by twisting and flexing it to loosen the calcium deposits. Replace the Water Panel evaporator (Stock No. 35) and with a new Genuine Aprilaire Water Panel. Slide the Water Panel evaporator back into the scale control insert with the colored spot up and snap the distribution tray (4) back into place.

  • Page 15: Model 550

    Replace the Water Panel evaporator (Stock No. 10) and with a new Genuine Aprilaire Water Panel. Slide the pad back into the insert frame with color mark up and snap the distributon tray back into place.

  • Page 16: Limited Warranty

    TABLE OF CONTENTS WARRANTY REGISTRATION Visit us on-line at www.aprilaire.com to register your Aprilaire product. If you do not have on-line access, please mail a postcard with your name, address, phone number, product purchased and date of purchase to: Research Products Corporation, P.O.

This manual is also suitable for:

400600700

Table of Contents