UST DIGI MISTER DM530 User Manual

Duct mount atomizing/evaporative humidifier

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UNISYS TECHNOLOGIES

Duct Mount

Atomizing/Evaporative Humidifier

DIGI MISTER

DM530/DM538

User Manual

If you have any questions about the installation and operation of

your humidifier, please contact customer support:

US and Canada: 1-888-966-8074

E-mail: CustomerSupport@Unisys-Technologies.com

Web Site: www.Unisys-Technologies.com

READ AND SAVE THESE INSTRUCTIONS

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Page 1 UNISYS TECHNOLOGIES Duct Mount Atomizing/Evaporative Humidifier ® DIGI MISTER DM530/DM538 User Manual If you have any questions about the installation and operation of your humidifier, please contact customer support: US and Canada: 1-888-966-8074 E-mail: CustomerSupport@Unisys-Technologies.com Web Site: www.Unisys-Technologies.com READ AND SAVE THESE INSTRUCTIONS...
Page 2: Table Of Contents
TABLE OF CONTENTS SAFETY DEFINITIONS AND PRECAUTIONS ..........2 SAFETY DEFINITIONS ................2 SAFETY PRECAUTIONS ................2 INTRODUCTION ..................... 3 KNOW YOUR HUMIDIFIER ............... 3 PACKAGING CONTENT ................4 COMPONENTS ................... 4 SPECIFICATIONS ..................5 INSTALLATION ....................5 MOUNTING LOCATION ................5 MOUNTING CUT-OUT ................
Page 3: Safety Definitions And Precautions
SAFETY DEFINITIONS AND PRECAUTIONS SAFETY DEFINITIONS These safety terms identify information you must read. ⚠ CAUTION: Indicates a hazardous situation which, if not avoided, could cause bodily injury or property damage. ⚠ WARNING: Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
Page 4: Introduction
INTRODUCTION Thank you for selecting the DIGI Mister® DM530/DM538 whole-house humidifier, crafted by Unisys Technologies LLC, for your comfort needs. Our patented humidifier boasts the following exceptional features: ✓ Flexible capability. By adjusting the inlet water pressure, changing the number of nozzles (1 to 5) and hot air temperature, this humidifier can be used for homes and offices of various sizes.
Page 5: Packaging Content
PACKAGING CONTENT Name Qty. Picture DM530/DM538 Humidifier See below Mounting Gasket Humidistat Wire Harness Spray Nozzles Spray Stoppers Water Pressure Regulator 16-14 AWG Female ¼” Mounting Screws Wire Clamp Spray Nozzle Tester Nozzle Clean Needle User Manual COMPONENTS A. Observation Window E.
Page 6: Specifications
SPECIFICATIONS Model DM530/DM538 Type of Unit Atomizing/Evaporative Install Position Supply Duct Power Supply 24 V~, 50/60Hz Rated Power DM530: 5.0Watt / DM538: 8.0Watt Water Mist Rate 7 ~ 35Gal./Day (1.1 ~ 5.5 L/h) @ 60 psi Unit Dimension 5.1 x 4.3 x 4.3 in. (130 x 110 x 110mm) Duct Cut-Out Size 4 x 3.2 in.
Page 7: Mounting Cut-Out
⚠ WARNING: WATER DAMAGE. Do not install the humidifier where accidental overflow could cause damage to the home or properties. Dripping water can cause property damage. ⚠ WARNING: UV-C LIGHT HAZARD (DM538 ONLY). Do not install the humidifier where the duct work is not totally closed. Do not install in an area near a vent or other opening through which the UV light is accessible, or completely close/disable them to prevent any potential UV light leakage.
Page 8: Mount The Humidifier
MOUNT THE HUMIDIFIER Remove the paper on the back side of the gasket and stick it to the position on the duct as shown in Fig. 2, or you can attach the gasket on the back side of the mounting frame of the humidifier. With the spray nozzle bracket in rotating-out position, push and slide the humidifier unit from left to right into the cut-out opening so that the 2 tabs at the right side of the mounting frame are inside of the opening’s...
Page 9 connected to the 120V HUM terminal on the furnace control board. 24VAC power will be applied to the humidifier whenever both burner and main air blower motor are in operation. Fig. 4 Standard Electrical Wiring Users of the DM538 humidifier, which has disinfection and purification functions using UVC LEDs, can choose to make the optional connection shown in Fig.
Page 10: Humidistat Connection
⚠ WARNING: ELECTROCUTION HAZARD. Improper electrical wiring can cause personal injury or property damage. It is required by local codes that the unit be installed by a qualified HVAC technician or electrician. All wiring must be in accordance with NEC and existing local codes. HUMIDISTAT CONNECTION To get an accurate and stable humidity reading, it is recommended that the humidistat be located inside living space within 10 feet of the...
Page 11: Set Up And Operation
• Ensure proper installation by observing the flow direction indicators on the saddle valve, water filter, and pressure regulator to prevent water leakage, malfunction, or component damage. • It is crucial that a good polyphosphate filter be installed to minimize scale or sediment build-up of hard minerals onto plenum and duct surfaces and prevent nozzle clogs.
Page 12 • In rural areas where the water pressure fluctuates a lot set the pressure to match or slightly below the lower pressure limit, so that the inlet water pressure will be consistently all the time. • Do not reduce the water pressure below 30 psi since the water mist cannot be atomized adequately at such low pressure.
Page 13 Following three key factors will determine the appropriate water pressure setting and the number of nozzles to be installed. The recommended strategy is to begin with a lower pressure setting and a smaller number of nozzles. If the water mist can be fully evaporated, gradually increase the pressure or add more nozzles as needed: 1) Housing or building size The table below shows the approximate number of nozzles vs.
Page 14: Humidity And Hot Air Temperature Setting
3) Evaporating status of water mist Water mist evaporation depends on air temperature, water mist hanging time in hot air, and air movement speed, which can vary based on furnace type. Multistage furnaces or heat pumps typically have lower hot air temperature and slower blower speeds, making evaporation more challenging.
Page 15 air and burner turns on. The display window shows current humidity level (blue number on the left) and hot air temperature (red number on the right). By default settings, the humidifier starts to spray water mist if the relative humidity (RH) below 50% and the hot air temperature above 110°F (43°C).
Page 16: Maintenance
The recommended settings of relative humidity levels versus outside air temperature are outlined in the table below. These settings strike a balance between RH levels optimal for comfort and humidity levels suitable for home protection, while preventing excessive condensation on windows. Outside Temperature Recommended RH Setting +40°F(+4°C)
Page 17 or build-up during production, transportation, or operation could adversely affect their performance. Fig. 10 Spray Nozzle Assembly Follow these simple steps to check each nozzle: ➢ Install the nozzle tester on a ¾” faucet or garden horse ➢ Tighten a nozzle on the tester by turning it clock-wise ➢...
Page 18 After installing the tested nozzles on the humidifier, check through the observation window (FIG. 9) to verify that all the nozzles are still spraying a fine mist. During the heating season, inspect the water inlet pressure and mist status of each nozzle weekly, ensuring there are no water puddles or drips inside or outside the plenum or duct.
Page 19: Warranty
WARRANTY Unisys Technologies LLC provides a two-year warranty from the purchase date for all new DIGI MISTER humidifiers bought from us or authorized sellers. This  warranty covers defects in material and workmanship under normal, non- commercial use and services. All components are included in this warranty, except expendable items like spray nozzles.
Page 20: Frequently Asked Questions
FREQUENTLY ASKED QUESTIONS What factors must be considered for the mounting location of the humidifier? When considering the mounting location of a humidifier, several factors need to be taken into account to ensure optimal performance and efficiency. These factors include: Temperature: The hot air temperature must fall within the range of 100°F to 150°F.

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Digi mister dm538