Herrmidifier Dual Pneumatic User Manual

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READ & SAVE THESE INSTRUCTIONS
Dual Pneumatic
Control Cabinet
Herrmidifier® | www.herrmidifier-hvac.com
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Installation, Operation & Service Manual
TABLE OF CONTENTS
Warranty ...............................................................................................................................................2
I. Introduction ........................................................................................................................................ 3
II. Operational Characteristics ..............................................................................................................3
III. Mounting .......................................................................................................................................... 3
IV. Plumbing .......................................................................................................................................... 4
V. Controls ............................................................................................................................................4
VI. Start-up Checklist ............................................................................................................................ 5
VII. Start-up ..........................................................................................................................................5
VIII. Atomizing Head Operation ............................................................................................................5
IX. Pressure Settings ............................................................................................................................ 5
X. Maintenance ..................................................................................................................................... 5
XI. Extended Shutdown ........................................................................................................................6
XII. Atomizing Head Adjustment ........................................................................................................... 6
XIII. Nozzle Troubleshooting ................................................................................................................. 6
XIV. Wiring Diagram ..............................................................................................................................7
Dual-Pneumatic
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WARRANTY
1. TRION, Inc. warrants to the buyer or any user during the duration of the Warranty that the Herrmidier humidier described in this manual will be free from defects of material and workmanship for a period of two (2) years.
2. For this Warranty to be effective, this humidier must be installed, operated and maintained in accordance with the Installation
Instructions, Operations and Service Manual(s) supplied with the humidier.
3. In the event of a defect or malfunction in this product during the Warranty Period, user may contact their Herrmidier Representative or Trion Customer Service Department for a Return Material Authorization number. Items tagged with this number may be returned to the Trion Factory Repair Department for complete reconditioning without charge to the user for parts or labor. Incidental expenses such as cost of transporting the part/unit to Trion shall be borne by the user. Upon
completion of the reconditioning, the humidier will be returned at no cost to the user. In an effort to keep equipment on line,
Trion may elect to send items out and use the RMA to return alleged defective parts for examination. Credit consideration will
be given upon return and conrmation of improper performance. In either case, items returned without an RMA number will
not be accepted!
4. This Warranty does not cover eld labor for repairs to this humidier or any special, indirect or consequential damages. Some
states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply
to you.
5. If, after a reasonable number of attempts to do so, TRION, Inc. is unable to remedy any defects or malfunctions in this
humidier, then the user may elect either a replacement of such product or part which may be defective without charge or a
refund at the buyer’s original purchase price.
6. This Warranty gives you specic legal rights, and you may also have other rights, which vary from state to state.
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Installation, Operation & Service Manual
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 sufcient 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 orice 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 orice
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 specic layout drawings with each job. Typically, a “unistrut” style mounting structure is eld
fabricated to support the atomizing manifold.
Dual-Pneumatic
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
specied 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.
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WARNING
Do not mount any controls inside the unit or tap power from any location in the unit, except as stated in these instructions. Do not place objects near the cabinet. Do not attach to dry wall without studs.
IV. PLUMBING
Each cabinet has an air inlet, water inlet, air outlet, water outlet and a drain. All air connections are ¾” and all water connections, including drain, are ½”.
1. Drain loop must extend 3” above highest location of heads or water outlet port on cabinet. This loop allows water pressure to be relieved on system shutdown while maintaining water volume inside piping.
2. Piping from control cabinet to manifolds should be ¾” for the air and ½” for the water piping unless otherwise
shown on your job specic drawings provided for your
project.
CAUTION
Any minerals that are in the water will be injected into the
airstream. Your application/process may require some means of air or water ltration to complete a successful
application. Consult the factory if you should have any
questions. Softening the water only increases the TDS level.
V. CONTROLS
Controls may be supplied by the factory or others. The following information applies to all controls factory supplied or furnished by others. All external electrical control circuits are to be connected to the unit using the terminal strip located in the electrical compartment. Field wiring
from humidistat to humidier and between safety devices,
such as high limit humidistat and air proving switches, should be 18 AWG stranded or 20 AWG solid wire. Wall devices should be mounted at a height similar to that of a typical thermostat and should be located in an area that will provide good representation of the overall space
being humidied. Do not mount wall devices directly in
the air stream of a supply grille or room distribution unit.
Control Circuit Connections
ON/OFF
1. Control Input - Unit will operate with any two-position device. Demand for humidity will close the contact.
2. Limit Input - Unit will operate with any two-position device. The humidistat contact will open on humidity rise.
NOTE: Inlet water pressure must be in range of 50-100 psig. Consult the factory if you are outside this range.
Supply Power
1. Supply power of 120 VAC, 5 amps is required.
2. Field wiring of the main power supply is connected directly to the terminal strip in the control cabinet. A ground lug is provided for the ground wire.
3. Install external over current protection and provide wiring in accordance with the NEC, state and local codes.
4. Power supply must be “clean”; free of spikes, surges and sags; +10%, -15% of nominal. Ground should be true earth ground.
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VI. START-UP CHECKLIST
This checklist is intended to highlight critical installation
points. A poor installation frequently results in start-up difculties and always results in less than ideal operation of the humidier.
1. Ensure all valves and valve cocks throughout the system (especially at every head) are shut off.
2. Electric power is connected to the control cabinet per the wiring diagram.
3. All humidistats and external inputs are connected to the cabinet.
4. Air compressor is primed and oiled and air supply is connected to the cabinet.
5. Air supply line has been purged and blown down to remove any installation dirt.
6. Air supply line has been charged, leak tested and has a minimum of 60 psi pressure to the cabinet.
7. Water supply is connected to the cabinet and has been purged and blown down to remove installation dirt.
8. Water supply is charged and leak tested and has a minimum of 50 psi pressure at the cabinet.
9. Drain loop has been connected to the bottom of the cabinet and has been plumbed to an open drain.
10. Drain piping is installed with a loop a minimum of 3” above atomizing heads and all piping after the cabinet.
11. All water piping from the cabinet to the manifolds is level
and without loops, or automatic oat type air vents have
been installed at high points to remove trapped air.
12. All air and water lines at the ends for the atomizing heads have been terminated with hose bibs.
VII. START-UP
After all checklist items are completed (and the total installation is complete) the Dual Pneumatic system is ready to start. Refer back to the Start-Up Checklist prior to Start­Up below.
IMPORTANT: Before scheduling factory start-up, please have any issues relating to the “Checklist” resolved. If additional
trips are required, additional start-up costs will be incurred!
VIII. ATOMIZING HEAD OPERATION
The Herrmidier atomizing heads operate with the water
pressure higher than the air pressure. As air enters the
atomizing head, it ows in a centrifugal motion inside the air
nozzle and outside of the water nozzle. As the water enters the atomizing head, it creates pressure against the diaphragm and compresses the spring located on the opposite side of the diaphragm. The motion of the diaphragm pulls the water seat away from the bottom of the water nozzle allowing water
to ow through the water nozzle. As the water exits the water
nozzle, it becomes atomized by the compressed air inside
the air nozzle and exits the atomizing head as a ne mist.
IX. PRESSURE SETTINGS
IMPORTANT: The air and water pressures to the atomizing
head should only be adjusted when the humidier is at full
output. Do not attempt to adjust the air and water pressure settings at any other time. The instructions below assume that the atomizing heads are installed at the same elevation as the water control section. Adjustment from this standard must be made to compensate for any elevation differences between the water control section and the atomizing head manifold.
1. Set the air pressure at 30 psig.
2. Set the water pressure at 33-38 psig according to the atomizing head capacity as listed below:
a. 6 lb/hr. 35 psig
b. 8 lb/hr. 38 psig c. 10 lb/hr. 33 psig d. 12 lb/hr. 35 psig e. 15 lb/hr. 37 psig
The water pressure settings listed above will allow the atomizing heads to perform at their rated capacity (lb/hr.). It may be desired to deviate slightly (1-2 psig) from the standard settings in order to enhance performance. Slightly
lower water pressures will result in a ner atomized spray
(smaller droplet size). Be aware that any adjustments such as this will also reduce the rated capacity of the heads. Use caution accordingly.
1. Blow out air and water lines to the control cabinet.
2. Set all controls to their lowest setting (control and limit if applicable). This allows the system to be turned “on” without the atomization process being started.
3. Once the units get the signal to run and unit is turned “on,” the air solenoid will energize within 5 seconds.
Once the air pressure switch detects sufcient air
pressure, the water solenoid will open.
4. With individual air and water valves at atomizing heads closed, blow out the air and water lines through the hose bibs.
5. A factory-trained technician will complete the balance of the start-up.
Dual-Pneumatic
X. MAINTENANCE
Air Compressor – follow manufacturer’s recommended instructions.
Atomizing Heads – clean dust and debris from outside of
heads as required. If raw water is used, we recommend
removing the atomizing nozzles and strainer screens once a year for disassembly and cleaning. DO NOT use a wire or other foreign object to clean nozzle as this
could ruin orice.
Air & Water Lines – blow out once a year. Check joints for leaks once a year.
Humidistats should be checked once per year.
Solenoid valves should be checked once a year for proper operation and closure.
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XI. EXTENDED SHUTDOWN
After an extended shutdown, air and water lines should be blown out prior to resuming normal operation
XII. ATOMIZING HEAD ADJUSTMENT
The atomizing heads are factory adjusted and tested.
Typically, no adjustment is required unless the atomizing
heads have been disassembled for maintenance. Do not adjust individual atomizing heads to reduce capacity or enhance performance. This is done only by changing the operating pressures for the entire system.
1. Turn the system on to full output and check that the air and water pressures are correct.
2. Remove the cap from the back of the atomizing head.
3. Using a screwdriver, slowly turn the spring tension nut clockwise until the atomizing heads stops spraying.
4. Note the position of the spring tension nut.
5. Back the spring tension nut out two full turns counterclockwise.
6. If head is not spraying at start of procedure, back out spring tension nut until head starts to spray and then begin step 3.
WARNING
Absolutely no other components may be mounted inside
or electrically tapped into the humidier without voiding
the warranty.
XIII. NOZZLE TROUBLESHOOTING
1. Heavy spray patters (droplets too large)
a. All heads – This is caused by incorrect air and water pressure settings. Review settings and
adjust as required. Never allow air pressure to
exceed the water pressure. b. Individual heads – These heads are not getting enough air for one of the following reasons: i. Foreign matter may be clogging the screen (AH-21) in the air strainer union of the head. Clean or replace it. ii. One or more of the heads may have been improperly adjusted or the individual shut-off valve may be throttled. No valves should ever be throttled. Readjust if necessary.
iii. Water nozzle (AH-942) orice may have been
enlarged due to bent cleaning needle. Replace
parts as required. iv. Atomizer nozzle (AH-941) orice may have
been enlarged due to improper cleaning or
dirty air. Replace part as required. Standard air orice sizes for the various heads are as
follows.
1. 6 lb/hr. - 0.95 mm
2. 8 lb/hr. - 1.10 mm
3. 10 lb/hr. - 1.15 mm
4. 12 lb/hr. – 1.35 mm
5. 15 lb/hr. – 1.45 mm
2. Spray pattern too light at full capacity a. All heads – This is caused by incorrect air and water pressure settings. Review settings and
adjust as required. Never allow air pressure to
exceed the water pressure. b. Individual heads – These heads are not getting enough water for one of the following reasons: i. One or more of the heads may have been improperly adjusted or the individual shut-off valve may be throttled. No valves should ever be throttled.
ii. Foreign matter may be restricting water ow
in the water nozzle (AH-942). Turn off the air and water valves at the head. Remove the atomizer nozzle and water nozzle. Blow water nozzle with air. Do not use wire or other hard object that will score the inside of the nozzle.
3. Sputtering heads (Air pressure at the atomizing heads exceeds water pressure.) a. Adjust air and water pressures to correct operating pressures. b. Normally open drain solenoid on water control section may have a malfunction allowing water to leak into drain line during operation. Solenoid valve seat may have foreign matter under the seat causing it to leak. Solenoid may have defective seat.
4. Inoperative heads (all heads) a. The atomizing heads may be shut down because
the system controls and set points are satised.
b. If the desired RH level has not been achieved, check calibration of the controls and adjust as
required.
c. Air and water supply valves are not open. d. No supply air pressure. If supply valves are open and the gauges indicate no air pressure, check compressed air source. e. No power to the air and water solenoid valves. Check controls and control cabinet fuses.
5. Inoperative heads (individual heads) a. Be sure air and water valves to the atomizing heads are open. b. Possible defective parts inside atomizing head. Shut off air and water valves to the head and remove head from the system. Disassemble and examine internal parts. Repair and
reassemble as required. Rebuilding kits are available from your local Herrmidier
representative. Perform a complete restart and readjustment of the atomizing head upon reassembly and repair.
6. Air without water – Be sure water valve to control section is open. Check modulating water valve, water solenoid and drain solenoid on water control section.
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XIV. Wiring Diagram
Installation, Operation & Service Manual
Dual-Pneumatic
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Herrmidifier
®
101 McNeill Rd. | Sanford, NC 27330
P: 800.884.0002 | F: 800.458.2379 | www.herrmidifier-hvac.com | cs@herrmidifier-hvac.com
© Herrmidier 2014. All Rights Reserved.Form No. 268046-001 Rev. 10/14
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