Herrmidifier Dual Pneumatic - Manual (Page 5)

Dual-Pneumatic
I n s t a l l a t i o n , O p e r a t i o n & S e r v i c e M a n u a l
www.herrmidifier-hvac.com 3
I. INTRODUCTION
The Dual Pneumatic system is a space applied air/water
atomization system designed to introduce atomized water
into a factory setting via ON/OFF control.
II. OPERATIONAL CHARACTERISTICS
Upon a call-for-humidity, the controls will energize the
compressed air solenoid valve. An air pressure switch will
close if sufficient air pressure is present to allow for proper
atomization. When the air pressure switch contacts close,
the supply water valve opens, the water drain valve closes,
and atomization will begin. Each nozzle is equipped with
a clean-out pin that helps keep the water orifice clear of
mineral build-up each time the nozzle is cycled. Periodically,
the controls will de-energize the water control section in
order to actuate the clean-out pin to keep the water orifice
clear. During operation, if the air proving switch contacts
open, the system will de-energize. If the system ON/OFF
switch is opened the system will de-energize.
Allowable Operating Conditions
• Ambient Temperature: 40°-120°F (4°-50°C)
• Ambient Relative Humidity: 0% - 90%
• Line Voltage: -15% to +10% Nominal
• Frequency: 50/60 Hz
• Supply Air Pressure: 60-100 psig
• Supply Air Quality: Filter clean and dry to 35°F dew point.
• Supply Water Temperature: 40°-100°F (4°-38°C)
• Supply Water Pressure: 50-100 psig
• Supply Water TDS less than 50 ppm: Consult Factory
with water analysis and application data prior to selecting
equipment.
NOTE: If units are mounted in outdoor enclosures, conditions
inside enclosure must be maintained as shown above.
III. MOUNTING
The Dual Pneumatic system consists of two basic
components: the control cabinet and the atomizing-head
assemblies. The control cabinet should be mounted so that
the water outlet of the control cabinet is level or below the
water manifold. Air vents must be mounted on any loops
necessary to connect the cabinet to the manifolds.
Cabinet depth = 8.3”
Minimum Cabinet Clearances
Top: 12”, Bottom: 12”, Sides: 12”, Front: 36”
Hang the cabinet on the wall or unistrut mounting frame.
Two keyhole slots and two additional mounting holes are
provided. Be sure the unit is level and mounted directly
to the wall to wood studs as least 2” thick (or equivalent).
The atomizing head manifolds consisting of air manifolds,
atomizing heads, water manifold and unistrut brackets are to
be located as shown on specific layout drawings with each
job. Typically, a “unistrut” style mounting structure is field
fabricated to support the atomizing manifold.
Manifold Installation
1. Install the air/water manifolds per the layout drawing
included with this package.
2. Use only copper, plastic or stainless steel piping as
specified in your print package.
3. Keep runs between control cabinets and heads as short
as possible.
4. Piping runs between control cabinets and manifolds
should be as direct as possible. If loops are unavoidable,
automatic air vents must be supplied and installed.