DriSteem VM-4 User Manual

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READ AND SAVE THESE INSTRUCTIONS

VAPORMIST

®

and

VAPORMIST DI

ELECTRIC STEAM HUMIDIFIERS

Installation, Operation

and

Maintenance Manual

For toll-free technical support

call 1-800-328-4447

cETL LISTEDETL LISTED

VMOM-0600.PDF 1 11/19/2009 9:59:05 AM

Table of Contents

Questions and Answers:

J
Jacob SuttonAug 9, 2025
Why is my DriSteem VM-4 not heating?
- J
  Jacob SalazarAug 9, 2025
  If your DriSteem Humidifier isn't heating, it could be due to several reasons. First, check the main line safety switch and fuses, and ensure the unit is receiving the correct supply voltage. Another possible cause is an incorrect or nonexistent control voltage. In this case, try resetting the control transformer circuit breaker and verify that there's 24 VAC control circuit voltage at T-1 and T-2 on the control board. Also, make sure the humidistat is calling for humidity and that it isn't faulty. Finally, check the safety controls, air flow switch, and high humidistat.
N
Nicole DonaldsonAug 16, 2025
What to do if my DriSteem VM-4 will not fill?
- K
  kristenwatkinsAug 16, 2025
  If your DriSteem Humidifier isn't filling, start by checking the water supply and shut-off valves to ensure there's water pressure at the valve. Then, check the water fill valve to see if it's receiving 24 volts. Also, inspect the strainer and valve for any blockages. Finally, verify the control voltage across the fill valve output, as a faulty control board could be the reason.
H
hendersonlatoyaAug 22, 2025
Why does my DriSteem Humidifier have low output even with proper water level?
- K
  Kelly LiAug 22, 2025
  If your DriSteem Humidifier has reduced or no output despite the water being at the correct level, it could be due to a malfunctioning heater. Verify that the proper voltage is being applied to the heaters and check the heater amp draw, comparing it to the wiring diagram ratings. Another potential cause is a malfunctioning control system. If this is the case, replace the heater contactor if it's not functioning. Also, check auxiliary limit controls (humidistat, air flow proving switch, etc.) and reset, replace, or calibrate them as needed.
C
Christopher MarshallAug 27, 2025
What to do if my DriSteem VM-4 does not stop filling?
- A
  Andrea DillonAug 27, 2025
  If your DriSteem Humidifier won't stop filling, it might be due to a few reasons. First, ensure that the water conductivity is at least 100 micromhos/cm (2 gr/gal) or .34.2 mg/liter. You might need to add salt to the tank. Also, check the fill valve for any foreign matter that may be causing it to stick open. Inspect the drain valve to ensure it's closed and that the fill valve is installed correctly, noting the arrow for proper water flow. Finally, the humidifier may be in periodic drain and flush, so check the controller display.
R
Robert Knox DDSSep 2, 2025
Why is my DriSteem VM-4 short-cycling?
- J
  Jeffrey McconnellSep 2, 2025
  If your DriSteem Humidifier is short-cycling, the controller cycle rate might be set too low. Review the controller cycle set point to resolve this issue.

DriSteem VM-4 Specifications

General

Brand	DriSteem
Model	VM-4
Category	Humidifier
Language	English

Summary

INSTALLATION

Locating and Mounting the Humidifier

Guidance on selecting a suitable location and mounting the VAPORMIST humidifier.

PIPING AND WIRING

Piping Connections and Considerations

Electrical Wiring Guidelines

AREA-TYPE APPLICATION USING SPACE DISTRIBUTION UNITS

START-UP AND OPERATION

Preparation for Start-Up

Covers mounting, piping, and electrical checks before operation.

Control System Checkout Procedures

Detailed steps for starting and verifying system operation using the control system.

MAINTENANCE

Standard Water Model Maintenance

Details proper skimming, draining, and flushing for standard VAPORMIST models.

Inspect and Service Procedures

Step-by-step guide for inspecting and servicing the unit's components.

Standard Model Off-Season Shutdown

DI Water Model Maintenance

DI Model Off-Season Shutdown

VAPORMIST® TROUBLESHOOTING GUIDE

VAPORMIST® DI TROUBLESHOOTING GUIDE

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