Desert Aire Aura QS Manual de usuario

Installation and Operation Manual

• 100% Outdoor Air

Systems & High

Outdoor Air Systems

• Aura™ (QS), dedicated

outdoor air system,

offers a high quality

dehumidifier with

various options to

cover multiple

applications

• TotalAire™ (QS),

dedicated outdoor air

systems, offers an

optional energy

recovery wheel that

recovers both sensible

and latent heat.

• VerticalAire™ (QV),

dedicated outdoor air

system, is a high-

quality cost-effective

dehumidifier that’s

designed for tight

spaces

Indoor Air Quality

Aura™ (QS)

TotalAire™ (QS)

VerticalAire™ (QV)

TotalAire™ (QS)

Dehumidifier

VerticalAire™ (QV)

Dehumidifiers

Aura™ (QS)

Dehumidifier

Desert Aire - QS/QV Manual

DANGER

ONLY TRAINED, QUALIFIED PERSONNEL SHOULD INSTALL AND/OR SERVICE

DESERT AIRE EQUIPMENT. SERIOUS INJURY, DEATH AND PROPERTY DAMAGE CAN

RESULT FROM IMPROPER INSTALLATION/SERVICE OF THIS EQUIPMENT. HIGH VOLTAGE

ELECTRICAL COMPONENTS AND REFRIGERANT UNDER PRESSURE ARE PRESENT.

For any unit labeled Class 1, Group D, Division 2, all wiring must be in accordance to

Class 1, Group D, Division 2 requirements. Insure that all local, state, national and any

other applicable codes are adhered to when connecting any device to this equipment.

All electrical connections to units labeled Class 1, Group D, Division 2 must be done

with a conduit seal.

Desert Aire

Dehumidication Equipment Standard Limited Warranty

Desert Aire warrants the dehumidifying unit to be free from defects in materials and workmanship subject to the terms,

conditions and limitations stated herein.

TERMS

Desert Aire warrants all components (except as noted) for a period of two (2) years from the date of shipment. This

warranty shall be limited to the supply of new or rebuilt parts for the part which has failed because of

defects in workmanship or material, and does not include the cost for labor, transportation or other costs not herein

provided for. Replaced parts are warranted only for the remaining portion of the original warranty period.

CONDITIONS

The warranty is subject to the following conditions:

1. The unit must be properly installed and maintained in accordance with the Desert Aire

“Installation and Operation Manual” provided with each unit and/or other documentation provided.

2. The Start-Up Report must be completed and returned to Desert Aire Service for evaluation. If no

deciencies are identied a Warranty Validation Letter will be issued that provides all warranty dates

and coverage. If installation or start-up deciencies are present, these must be corrected and

communicated to Desert Aire in order to activate warranty.

3. This warranty shall not apply to any part that has been tampered with, or has been subject to

misuse, negligence or accident. A warranty can be obtained for altered equipment but only with

written consent from Desert Aire.

 4. Thefollowingpartsandcomponentsareexcludedfromthewarranty:belts,lters,driers,fusesand

refrigerant.

4Desert Aire - QS/QV Manual

5. Refrigerant coils or other components that corrode due to improperly balanced pool chemistry or

corrosive air quality will not be warranted.

6. All replacements or repairs will be FOB Germantown, WI.

7. This warranty shall be null and void if defects or damages result from unauthorized opening of the

refrigerant circuit, tampering with factory set controls, or operating outside the original design conditions.

8. Desert Aire shall not be liable for labor costs incurred in diagnosing the problem, or the removal

or replacement of the part or parts being repaired.

9. Desert Aire must preauthorize all warranty coverage described herein.

Extended Warranty:

Your Desert Aire unit may have extended warrantees beyond this Standard Limited Warranty document.

Extended warrantees are only available at the time of the purchase of the original equipment. These extended

warrantees are covered under a separate document and their terms and conditions are separate from this

document. It is mentioned in this document for informational purposes only. Any Extended Warranties will be

identiedontheWarrantyValidationletter.

Any and all incidental or consequential damages are expressly excluded from this warranty. Some states do not allow

the exclusion of incidental or consequential damages for personal injury, so the above limitations may not apply to you

for certain damages. This warranty gives you specic legal rights, and you may also have other rights, which vary

from state to state. No person or representative is authorized to make any warranty or assume any liability not strictly

in accordance with the aforementioned.

Inquiries regarding warranty matters should be addressed to:

Desert Aire Corp c/o Service Manager

N120 W18485 Freistadt Road • Germantown, WI 53022

PH: (262) 946-7400 • FAX: (262) 946-7401 • E-MAIL: [email protected]

Additional copies of this manual can be purchased for a nominal fee from Desert Aire. Desert Aire also posts the most

current revision of our I/O Manuals on our website. For a digital copy of the I/O Manual for your unit revision, please

submit request to the contact information listed above.

Gas Heat Exchanger Ten (10)-Year Prorated Warranty Terms (For Aura™ units with gas heat only)

Desert Aire offers an extended prorated eight (8)-year warranty for gas heat exchanger. All other heater components

are covered under the initial 2 year warranty.

2 Years Parts Only from date of shipment. Prorated from years 3-9 as follows:

Year 3: Desert Aire warrants 70% of replacement price

Year 4: Desert Aire warrants 60% of replacement price

Year 5: Desert Aire warrants 50% of replacement price

Year 6: Desert Aire warrants 40% of replacement price

Year 7: Desert Aire warrants 30% of replacement price

Year 8: Desert Aire warrants 20% of replacement price

Year 9: Desert Aire warrants 10% of replacement price

For Units w/Gas Heat:

For Your Safety Read Before Operating

WARNING: If you do not follow these instructions exactly a fire or explosion

may result causing property damage, personal injury or loss of life.

A. This appliance does not have a pilot. It is equipped with an ignition device that automatically

lights the burner. Do not try to light the burner by hand.

B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the

floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any phone in your building. Immediately call

your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will

not push in or turn by hand, don't try to repair it, call a qualified service technician.

Force or attempted repair may result in a fire or explosion.

D. Do not use this appliance if any part has been under water. Immediately call a qualified service

technician to inspect the appliance and to replace any part of the control system and any gas

control that has been under water.

OPERATING INSTRUCTIONS

1. STOP! Read the safety information above on this label.

2. Set the thermostat to lowest setting.

3. Turn off all electric power to the appliance.

4. This appliance is equipped with an ignition device that automatically lights the burner.

Do not try to light the burner by hand.

5. Turn gas control knob clockwise to "OFF" position.

6. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor.

If you smell gas, STOP! Follow "B" in the safety information above on this label. If you don't

smell gas, go to next step.

7. Turn gas control knob counterclockwise to "ON" position.

8. Turn on all electric power to unit.

9. Set thermostat to desired setting.

10. If appliance will not operate, follow the instructions “To Turn Off Gas To Appliance” and call

your service technician or gas supplier.

TO TURN OFF GAS TO APPLIANCE

1. Set thermostat to lowest setting.

2. Turn off all electric power to the appliance if service is to be performed.

3. Turn gas control knob clockwise to "OFF" position.

Desert Aire - QS/QV Manual

Safety Labels are used throughout this manual. They comply with the ANSI Z535.4 Standard.

Please be familiar with the following labels and their denitions.

This is the safety alert symbol. It is used to alert you to potential

personal injury hazards. Obey all safety messages that follow this

symbol to avoid possible death or injury.

Indicates an imminently hazardous situation which, if not

avoided, will result in death or serious injury.

Indicates a potentially hazardous situation which, if not

avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not

avoided, could result in minor or moderate injury.

Caution used without the safety alert symbol indicates a

potentially hazardous situation which, if not avoided, could

result in property damage.

Product Warning for the State of California

Desert Aire - QS/QV Manual

TABLE OF CONTENTS

1. Introduction ................................................................................................................................. 9

1.1. Inspection ...................................................................................................................... 9

1.2. Freight Damage Claims ................................................................................................. 9

1.3. Rigging .......................................................................................................................... 9

  1.3.1.RiggingtheDehumidier................................................................................... 9

2. Installation

..................................................................................................................................

 2.1. LocationofDehumidier................................................................................................ 13

2.2. Duct Installation ............................................................................................................ 14

2.3. Condensate Drain Piping .............................................................................................. 14

2.4. Auxiliary Heat Coil Piping .............................................................................................. 16

2.5. Water Piping Installation (for Q-Pump and Water-Cooled Systems Only) .................... 16

2.6. Remote Condenser Installation (Air-Cooled Systems Only) .......................................... 19

2.7. High Voltage Wiring

......................................................................................................

2.7.1. High Voltage Connections ................................................................................. 20

2.7.2. Wire and Fuse Sizing ........................................................................................ 21

2.8. Controls and Sensors

...................................................................................................

2.8.1. Duct-Mount Sensor ........................................................................................... 22

2.8.2. Remote Room Sensor(s) ................................................................................... 22

2.8.3. CO2Sensors ...................................................................................................... 22

2.9. Auxiliary Heating Control Wiring

...................................................................................

2.9.1. Auxiliary Heating - Dry Contact Closure .......................................................... 22

2.9.2. Auxiliary Heating - Proportional Signal ............................................................ 22

2.10. Gas Heater (Optional) ................................................................................................... 23

2.10.1. Gas Heater Installation ................................................................................... 23

2.10.2. Gas Piping ...................................................................................................... 24

2.10.3. Gas Heater Location ........................................................................................ 30

2.11. Electric Heater (Optional) .............................................................................................. 33

2.12. Auxiliary Heat Coil Piping (Optional) ............................................................................. 33

2.13. Smoke Alarm Interlock .................................................................................................. 34

2.14. Cover Plates (if applicable) ........................................................................................... 34

2.15. Roof Curb w/ Wood Nailer (if applicable) ...................................................................... 35

2.16. Wheel Module Installation (Optional for Aura™ Products) ............................................ 36

3. Start-Up Procedures ................................................................................................................... 37

3.1. Preliminary Inspection ................................................................................................... 37

3.2. Gas Heater Start-Up (Optional) ..................................................................................... 38

3.2.1. Burner Adjustment .......................................................................................... 40

 3.3. AirowBalancing........................................................................................................... 40

3.3.1. Blower Adjustment Procedure ........................................................................ 41

3.3.1.1 Units with an EC Blower .................................................................. 41

3.3.1.2 Units without a VFD ......................................................................... 41

3.3.1.3 Unit with a VFD ................................................................................ 42

  3.3.2. AirowBalancingforDedicatedOutsideAirSystems(DOAS)....................... 42

3.3.2.1 Aura™ and TotalAire™ Units .......................................................... 43

   3.3.2.2 AirowBalancingforQVDehumidiers.......................................... 44

3.3.2.2.1 Damper Box Equipped VerticalAire™ Systems .................. 47

  3.3.3. AirowBalancingforDedicatedOutdoorAirSystems(DOAS)with

Unoccupied Recirculation ................................................................................ 47

  3.3.4. AirowBalancingforHighOutdoorAirSystems(HOAS)............................... 48

3.3.4.1 For Units with External Enthalpy Wheel (Aura™) ........................... 49

3.3.4.2 For Units with CO2Control (Aura™) ............................................... 49

Desert Aire - QS/QV Manual

8Desert Aire - QS/QV Manual

3.3.4.3 Recirculation Mode (TotalAire™) .................................................... 50

3.3.4.4 Mixed Air Mode (TotalAire™) .......................................................... 50

3.3.4.5 For Units with Systems Equipped with Demand Controlled

Ventilation Option (TotalAire™) ....................................................... 50

    3.3.4.5.1UnoccupiedModewithRecirculation(whenspecied)

(TotalAire™) .................................................................. 51

3.3.4.5.2 Occupied Mode Minimum Outdoor Air (TotalAire™) ...... 51

3.3.4.5.3 Occupied Mode Maximum Outdoor Air (TotalAire™) ..... 52

3.4. Refrigeration Testing ...................................................................................................... 53

  3.4.1. Dehumidication/CoolingMode.................................................................... 54

3.4.2. Heat Pump Mode ............................................................................................ 55

3.5. General Testing

............................................................................................................

3.6. Routine Maintenance Schedule

..................................................................................

3.6.1. Service Every Month ........................................................................................ 57

3.6.2. Service Every Six Months ..................................................................

..............

3.6.3. Service Every Year .............................................................

..............................

3.6.3.1 Energy Recovery Wheel (Optional)

........................

........................... 58

3.6.3.2 Gas Heater (Optional) ..................................

.......................................

4. Troubleshooting

........................................................................................................

..................

4.1. The Blower Does Not Run ............................................................................................. 61

4.2. The Compressor(s) Do Not Run .................................................................................... 62

4.3. High Pressure Alarms / Readings Above High Pressure Trip Set Point ...

......................

4.4. Low Pressure Alarms (Below 97 PSIG) Evaporator Coil Icing ................

.......................

5. Appendix

......................................................................

................................................................

5.1. Compressor Failure ................

........................................................................................

5.1.1. Compressor Replacement ............................................................................... 65

5.2. Recommended Duct Design

..........................................................................................

5.3. Recommended Controller Settings

................................................................................

5.4. IAQ Sequence of Operation

...........................................................................................

5.4.1. Basic Sequence

..............................................................................................

5.4.2. Blower Operation ............................................................................................. 71

  5.4.3. DehumidicationOperation............................................................................... 72

5.4.3.1. Packaged Units .................................................................................. 72

5.4.3.2. Q-Pump Inverter + Units .................................................................... 72

5.4.4. Cooling Operation ................................................................

............................

5.4.4.1. Packaged Units .................................................................................. 73

5.4.4.2. Q-Pump Inverter + Units .................................................................... 73

5.4.5. Heating Operation ........................................................................

...................

. 74

5.4.5.1 Water Source Heat Pump .................

.............................................

.. 74

5.4.5.2 Auxiliary Heat ..........................................................

.......................

... 75

5.4.6. SAT Control Options ........................................................................................ 75

5.4.7. Compressor Rotation ...................................................

.........................

........... 75

5.4.8. CO2Operation ..........................................................

..............................

.......... 76

5.4.9. Suction Pressure Operation ................................................

.............................

5.4.10. Enthalpy Wheel Operation ..............................................................

.................

5.5. Component Replacement, Charge, Evacuation, & Leak Instructions ..........

..................

5.6. System Rating Plate ...................................................................................................... 82

5.7. Start-Up Supervision Supplemental Information

...........................................................

5.8. System Start-Up Report

..................................................................

..............................

Start-Up Request Form ................................................................................................ 84

Start-Up Report

.............................................................................

................................

Compressor Replacement Form

...................................................

................................

1. Introduction

 DesertAiredehumidiersaredesignedtoprovideyearsofreliableservicewheninstalled

 properly.Readtheseinstructionscarefullybeforeyouinstallthedehumidier.

1.1. Inspection

 DesertAireinspectsandtestseachdehumidierbeforeitleavesthefactorysothat

you receive a quality piece of equipment. Unfortunately, equipment may become

 damagedintransit.Inspectthedehumidiercarefullybeforesigningthereceiving

papers. Check for both visible and concealed damage. Remove crating and inspect

 theexteriorcabinetfordamage.Dentedpanels,brokencratingoranyuidleakingfrom

the unit should be documented upon delivery.

1.2. Freight Damage Claims

 Ifthedehumidierhasbeendamaged,documenttheextentofthedamage.Takepicturesif

 possible.Next,obtainaclaimformfromthecarrier.Promptlylloutandreturntheform.

 Carriersmaydenyclaimsthatyouhavenotlledoutwithinaweekofdelivery.NotifyDesertAire

of any damage. Damaged units must have signed documents at the time of delivery to be eligible

for a freight claim.

1.3. Rigging

1. Failure to observe rigging instructions may lead to equipment damage, personal

injury, or death.

2. Lifting method and procedure must comply with all local and national codes and

regulations.

3. The use of safety slings in addition to lifting lugs is required.

4. Do not lift the dehumidifier in high winds or above people.

 DesertAiredehumidiersaresolidlybuiltandcanbeveryheavy.Avoidpersonalinjuryand

damaging the equipment by planning the installation carefully. Use moving equipment whenever

possible.

1.3.1. Rigging the Dehumidier

Depending upon the unit type, various rigging methods are used to best lift the

equipment. Please reference the applicable sections below:

Desert Aire - QS/QV Manual

• All Products (QV and QS)

Personnel should avoid stepping on the top of the unit. Desert Aire

   dehumidiersarenotdesignedtosupporttheweightofapersononall

portions of the roof. Damage incurred through caved or distorted top panels

will not be covered under warranty. If you must walk on the top panels,

carefully walk on the edges where structural integrity is greatest.

• VerticalAire™ Products (QV)

- 4-15 Ton

Move the unit to the desired installation location with the unit on the

wood skid. To remove unit from skid, position fork lift parallel to the

boards on the top of the skid. Carefully slide forks between the unit

and cross braces to pick the unit off the skid. The unit will have to be

carefully removed from the fork lift and placed into the desired

location using hand truck equipment dollies or pipe rollers. Use

caution to not damage the unit with the fork lift or tip the unit over

ensuring it is kept as level as possible.

- 20-30 Ton

The base is equipped with a built-in 12 gauge skid. Use a fork lift to

move the unit into place. Use caution to not damage the unit with the

fork lift or tip the unit over ensuring it is kept as level as possible. In all

cases, use appropriate safety practices while lifting the unit. Forklift

tie-down clamps, straps, and other restraints where applicable should

be used to prevent tipping of the load.

• Aura™ and TotalAire™ Products (QS)

   Aura™andTotalAire™dehumidiersareequippedwithfourormorelifting

points. Use spreader bars and safety straps when you rig the equipment.

- Utilize all of the lifting lugs provided when hoisting the unit.

   - Test-liftthedehumidiertoverifythatitisproperlybalanced.

- Refer to diagram below for additional lifting instructions.

Desert Aire - QS/QV Manual

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