(April, 2013)
DRH Series GEN1 Ultrasonic Humidifi er Installation, Operation & Maintenance Manual
1-4
1.4 Specifi cations
Type DRH Series Ultrasonic Humidifi er
Model DRH-04 DRH-06 DRH-08 DRH-16
Nebulizing capacity (lb/h) 4.4 6.6 8.8 17.6
Qty. of Ultrasonic nebulizers/unit 4 6 8 16
Power source 48VDC
Rated power consumption (W) 145 220 285 565
Weight (lb) 19.8 24.3 30.9 50.7
Electrical Characteristics
Allowable voltage range 47-51VDC
Insulation resistance 100 M.Ohms or more (excluding solid-state components).
Dielectric voltage withstand Operational when 1500VAC is applied for 1 minute (excluding solid-state components).
Operating conditions
Ambient working conditions 34 to 122°F; 90%RH or less.
Water supply quality DI or RO water. Water conductance <5 microsiemens purity.
Water supply pressure 30 to 60 psi
Water supply temperature 40°F to 104°F
Parts to be provided by user:
DI or RO supply water, Water supply valve, Water supply tubing (1/4” stainless steel or poly tubing rated for DI water),
power supply wiring and control wiring to the control box.
Notes: 1) Calcium, magnesium or other agents that may be contained in the supply water are atomized into
the air together with the mist and may form white powders after the water has evaporated. To avoid
this, always use DI or RO supply water.
2) The nebulizing capacity of the transducer in the ultrasonic nebulizer unit decreases gradually with
use. It should usually be exchanged after about 10,000 to 15,000 hours of operation, (depending
on water quality and suitable voltage), although the unit may continue to run as long as it’s effective
capacity meets the particular requirements.
3) To ensure full warranty coverage, the input voltage to the humidifi er must not exceed 51VDC. If the
input voltage exceeds 51VDC, damage to the transducers and print plates will result.
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