DryGair DG12 User manual

November 2017
Ver. 11/17
DryGair Dehumidification Unit
Installation, Operation and Maintenance
Manual (EU)

DryGair Energies Ltd.
ii
DryGair Energies Ltd. —www.drygair.com
8 Hamanofim St., Herzliya Pituach 46733
Tel.: [phone], Fax: [phone]
: drygair.energies
Proprietary and Confidential
Copyright © 2017 by DryGair Energies Ltd.
All rights reserved. No part of this manual may be reproduced or copied in any form by any means-
graphic, electronic, or mechanical, including photocopying, typing or information retrieval systems-
without written permission of DryGair Ltd.

DryGair Dehumidification Unit
Table of Contents
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TABLE OF CONTENTS
1. INTRODUCTION ______________________________________ 1
2. SAFETY _____________________________________________ 3
3. UNIT OVERVIEW _____________________________________ 7
4. INSTALLATION______________________________________ 10
5. UNIT PARTS AND COMPONENTS ______________________ 24

Table of Contents
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6. UNIT OPERATION ___________________________________ 33
7. MAINTAINING THE UNIT ______________________________ 40
8. TROUBLESHOOTING AND REPAIRING THE UNIT _________ 43
9. APPENDICES _______________________________________ 45
10. COMMENTS AND NOTES _____________________________ 62

DryGair Dehumidification Unit
List of Figures
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LIST OF FIGURES
Figure 2-1. High Voltage warning label _________________________________________ 5
Figure 2-2. Hearing Protection required label ____________________________________ 5
Figure 2-3. Hot Surface caution label___________________________________________ 5
Figure 2-4. Lift from Here notice_______________________________________________ 5
Figure 2-5. DryGair Identification label__________________________________________ 6
Figure 3-1. DryGair unit (front view) ____________________________________________ 9
Figure 3-2. DryGair unit (rear view) ____________________________________________ 9
Figure 4-1. Transferring the unit______________________________________________ 19
Figure 4-2. Water drain outlet________________________________________________ 22
Figure 4-3. Electrical switchboard and grid terminal block __________________________ 23
Figure 5-1. Temperature and humidity sensor ___________________________________ 24
Figure 5-2. Sensor unit_____________________________________________________ 24
Figure 5-3. Defrost temperature sensor ________________________________________ 25
Figure 5-4. Electrical compartment ___________________________________________ 26
Figure 5-5. Compressor (front view)___________________________________________ 29
Figure 5-6. Compressor (rear view) ___________________________________________ 29
Figure 5-7. Oil pressure protector and switches__________________________________ 30
Figure 5-8. Heat exchange compartment_______________________________________ 30
Figure 5-9. Expansion valve_________________________________________________ 31
Figure 5-10. Sight glass ____________________________________________________ 31
Figure 5-11. Blowing fans___________________________________________________ 32
Figure 6-1. Humidistat controller _____________________________________________ 36
Figure 9-1. Standard unit ___________________________________________________ 46
Figure 9-2. Small unit ______________________________________________________ 47
Figure 9-3. Standard split unit _______________________________________________ 48
Figure 9-4. Small split unit __________________________________________________ 49
Figure 9-5. Standard unit with heating & cooling _________________________________ 50
Figure 9-6. Small unit with heating & cooling ____________________________________ 51
Figure 9-7. Standard split unit with heating & cooling _____________________________ 52
Figure 9-8. Small split unit with heating & cooling ________________________________ 53
Figure 9-9. Warm climate unit _______________________________________________ 54
Figure 9-10. Four-direction canopy ___________________________________________ 55
Figure 9-11. Air distributor module (4-way canopy) _______________________________ 56
Figure 9-12. One-direction canopy____________________________________________ 57
Figure 9-13. Air distribution panel ____________________________________________ 58
Figure 9-14. Split unit ______________________________________________________ 59
Figure 9-15. Split unit connecting tubes________________________________________ 59
Figure 9-16. Air heating option _______________________________________________ 61

List of Tables
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LIST OF TABLES
Table 4-1. Parts and Accessories ____________________________________________ 20

DryGair Dehumidification Unit
Introduction
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1. INTRODUCTION
This manual provides instructions for operating the DryGair unit in a correct
and safe way, including installation instructions, maintenance procedures
and unit troubleshooting.
As DryGair continuously develops its machines to their maximum potential,
this manual, though completely up to date when issued, is subject to changes
without notice.
1.1 Before You Begin
Before you begin working with the DryGair dehumidification unit, read the
following
•This manual: the DryGair dehumidification Operation and Maintenance
Manual provides information and procedures for operating the unit, as
well as maintenance, troubleshooting and repair procedures.
▪The safety instructions.
▪Conventions: explains the symbols used in this manual.
Before beginning a procedure:
•Read the procedure through to the end. Thorough understanding of the
entire procedure prevents unnecessary loss of time and error.
1.2 Further Information
For further information, contact DryGair at:
Email: [e-mail]
Website: www.drygair.com

Introduction
Conventions
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1.3 Conventions
The following conventions are used in this manual:
Warning
Information given in a “warning” message warns of possible hazard to
personnel and extreme hazard to the unit.
Caution
Information given in a “caution” message refers to the safe operation of
the unit and provides warning where the possibility for damage to the
equipment exists.
Note
Information given in a note describes how the part/unit functions or
provides a tip on how best to use it.

DryGair Dehumidification Unit
Safety
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2. SAFETY
DryGair Energies Ltd. believes that the safety of personnel working with and
around the unit is the most important consideration. The DryGair unit is
equipped with all the safety devices necessary to ensure risk-free use under
standard conditions.
Machine installation, maintenance and adjustments must be performed only
by a qualified technician with expert machine knowledge and that has read
this manual.
Before operating the unit or performing maintenance operations, read and be
familiarized with the safety information.
•Obey and follow all warnings and cautions given in this manual.
•Comply with all approved and established precautions for operating
electrical and mechanical equipment.
•Only qualified and authorized personnel should perform maintenance or
repair tasks.
•Verify the power, and any other connected facilities, are turned off and
disconnected before beginning maintenance procedures, part
replacements, or repairs.
•We advise strict observance of the work safety standard as defined by the
authorities in each country.
DryGair cannot accept responsibility for injury to persons or damage to
objects resulting from not observing safety standards.
2.1 Hazards
Danger: Electrical Shock Hazard. High voltage is present at points throughout the
Unit. Contact with high voltage can result in injury or death. Before performing any
operation related to electricity, open the electric compartment cover, switch off the
Main Power switch and switch off the Circuit Breaker. Doing so ensures no voltage
is present.
Danger: Hot Surface Hazard. The heat exchangers and their pipes, and the
compressor may have a high temperature during unit operation. Do not touch the
compressor and the heat exchanger pipes and coils while the unit is operating.
Verify the unit has cooled down before touching them.
Danger: Bodily Injury Hazard. Be careful not to drop any of the unit parts.
Dropping the Covers might cause bodily injury or damage to the parts.

Safety
Operation Safety Notes
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2.2 Operation Safety Notes
The following safety practices must be complied with:
•CAUTION and WARNING notices posted on the machine and safety
notes in this manual.
•Ensure that all control panels and electrical panels are covered.
•Do not start the unit if any of the safety covers is missing.
•MOVING PARTS –Do not touch the fans during unit operation.
•Do not permit smoking or food in the working area.
•Personnel operating the unit must not remove covers or panels.
•Although the electrical compartment is closed by a door, operator access
to the compartment is strictly forbidden without explicit authorization.
•Ensure that all personnel operating the unit know where the main power
switch is located and what to do in case of electrical emergency.
•Locate approved types of fire extinguishers near the equipment.
2.3 Maintenance Safety Notes
Only authorized personnel are permitted to perform maintenance and repair
tasks. Before performing such a task, read the instructions to ensure you
understand them and that the required precautions and tools are available.
•For high mounted maintenance procedures, use a stable ladder to avoid
high fall injuries.
•To avoid getting caught in moving parts do not lubricate, repair or adjust
the machine while in operation, unless expressly written in the manual.
Stop the machine according to the machine stopping procedure before
lubricating or performing other maintenance tasks.
•Secure electrical wires and cables to prevent damage.
•The protecting doors and covers should not be opened during machine
operation.
•Replace all safety shields after completing set-up, troubleshooting and
maintenance procedures.

DryGair Dehumidification Unit
Safety
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2.4 Unit Labels
The following Warning, Certification and Identification labels are adhered to
the DryGair unit:
•Attention High Voltage
Figure 2-1. High Voltage warning label
•Hearing Protection Required
Figure 2-2. Hearing Protection required label
•Caution hot surface
Figure 2-3. Hot Surface caution label
•Lift from here notice
Figure 2-4. Lift from Here notice

Safety
Unit Labels
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•Identification Label
This identification label is located on the right panel and contains the
following information:
Figure 2-5. DryGair Identification label
•Model
The model number provides information on the specific unit
•Ps max
The maximum operating pressure
•Capacity
The drying capacity of the unit (at design conditions)
•Amp
The maximum required current
•Input watt
The power required by the unit (at 18°C and 80% RH)
•Serial No.
The serial number of the specific unit
•Refrigerant
The type of refrigerant used in the unit
•Quantity
The amount of refrigerant to fill in the unit
•Total weight
The overall weight of the unit

DryGair Dehumidification Unit
Unit Overview
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3. UNIT OVERVIEW
The DryGair dehumidifying unit is designed and manufactured by DryGair
Energies Ltd. The unit is designed for the dehumidification of greenhouses,
and can also be used in any other closed structure.
The unit reduces the humidity in the greenhouse according to a defined set-
point by pulling the wet cold air from the bottom of the greenhouse,
extracting the water, heating the air, and blowing the drier and warmer air
back into the greenhouse through an air distribution module.
The unit can also be configured to heat or cool the dried air.
The water condensed during the dehumidification process is removed from
the greenhouse through water drainage, and can be reused for other purposes
such as a hydroponic system.
3.1 Standard Features
The standard unit includes the following features:
•Humidification Set-Point –ensures the humidity in the greenhouse is
kept at this set-point.
•Temperature Control –stops the unit when the temperature drops to
10°C, and goes through a defrost cycle when reaching 6°C.
3.2 Available Models
The DryGair dehumidifying unit includes the following main models:
•Standard (Large)
•Small
•Warm Climate
Each of the above models can be configured as follows:
•Split configuration.
•With Heating & Cooling
•50 Hz or 60 Hz.

Unit Overview
Options
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3.3 Options
The DryGair unit can include one or more of the following options:
•Side Canopy –a 1-direction air vent.
•Combined Heating and Cooling –a water-based coil for heating or
cooling the air exiting the unit.
•Noise Reduction –an option for adding noise insulation to receive a
quieter unit.
•Protecting Wire-Net –a net for protecting the coil outer fins.
•Environmental Resistance –the unit parts are made of materials that
improve their resistance to chemicals and soil disinfectants.
•Wheels –set of wheels for unit mobility.
For more details on the available options, types and configurations, see
Appendix B and Appendix D.
Note
The configuration cannot be changed at the customer’s site.

DryGair Dehumidification Unit
Unit Overview
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3.4 Unit Description
The following figures show the various external parts of the DryGair unit.
Note
The front and rear view are of different models and configurations.
Figure 3-1. DryGair unit (front view)
Figure 3-2. DryGair unit (rear view)
1.
Air inlet to coils
2.
Removable cover to the
compressor
3.
Door to electrical
compartment
4.
Temperature and
humidity sensor
5. Removable cover to the:
▪Coils
▪Filter driers
▪Expansion valves
▪Temperature and
humidity sensor
6.
Fans and air distributor
(4-way canopy)
1
2
3
5
4
6
1.
Air inlet to coils
2. Removable cover to the
compressor and the
drain outlet
3. Removable cover to the
compressor pressure
switches
4.
Air distributor
(side canopy)
2
3
4
1

Installation
Site Preparation
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4. INSTALLATION
The installation chapter includes the site preparation, uncrating the unit and
installation instructions of the DryGair dehumidification unit.
Note
The site should be prepared before unpacking and powering-on.
4.1 Site Preparation
Prepare the installation site before receiving the DryGair unit.
4.1.1 Site Requirements
•The DryGair unit should be installed inside a greenhouse and located in
an accessible location for operation and maintenance. The unit should
preferably be located in the center of the greenhouse, blowing air towards
the plants.
•If the unit is placed next to the greenhouse wall, ensure it is distanced at
least 50 centimeters from the wall, and blowing air towards the plants.
•The unit should be placed on a concrete leveled surface, or on tiles built
according the unit dimensions and weight (see section 4.1.2 and Appendix
B).
•The unit in its final position should be positioned at a height the air
distributor (canopy) is just below the thermal screen (if exists) and the
unit's blowers are above the plants. The air should be distributed to the
center of the greenhouse.
•If the plants growing method is high-gutter, the unit should be elevated
on stable designed tables to a height that enables efficient and safe
operation of the unit.
•The transit lanes inside the greenhouse where the unit is to be installed
must be kept clear, and the floor must be clean and free from any
obstacles that might cause the forklift, truck or crane to “jump”.
•An electrical shut off switch (3×32 Amp), unless stated otherwise (e.g.,
small units), should be prepared and located in a protected location near
the unit.
•Drainage should be prepared for removal of the water that is condensed
by the unit. The unit is supplied with a metal 1½" BSP threaded bushing.
The prepared drainage should include a siphon.
Warning
The unit condensation water is not for drinking!
•The site should be equipped with suitable climbing equipment to enable
safe and comfortable access to the unit top.

DryGair Dehumidification Unit
Installation
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4.1.2 Unit Specifications (EU)
The unit specifications are according to model type and option. Drawings
with dimensions of the different models are attached in Appendix B.
•The units can be positioned on the ground –along the aisles, as part of
the rows, on the side of the greenhouse; or can be hung.
•Electricity consumption @ conditions of 18°C/80%RH.
4.1.2.1 Standard Unit
Specification
Value
Dimensions
Depth
930 mm
Width
2,320 mm
Weight
~775 kg
Height*
2,220 mm + ~500 mm
Air distribution module
Coverage Area **
Up to 4,000 m2
Temperature Operation Range
10°C –25°C
Water Condensation
(@18°C and 80% RH)
45 L/h
Electricity Requirements
3-phase, 32 Amp, 400 V, 50 Hz
Electricity Consumption
(@18°C and 80% RH)
10 kWh
Air Flow
~22,000 m³/h
Refrigerant Type
R507
** Exact height can be specifically adjusted
*** Depends on the crop
4.1.2.2 Small Unit
Specification
Value
Dimensions
Depth
920 mm
Width
2,300 mm
Weight
~550 kg
Height*
1,900 m + ~500 mm
Air distribution module
Coverage Area **
Up to 2,000 m2
Temperature Operation Range
10°C –25°C
Water Condensation
(@18°C and 80% RH)
24 L/h
Electricity Requirements
3-phase, 24 Amp, 400 V, 50 Hz
Electricity Consumption
(@18°C and 80% RH)
6 kWh
Air Flow
~12,000 m³/h
Refrigerant Type
R507
** Exact height can be specifically adjusted
*** Depends on the crop

Installation
Site Preparation
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4.1.2.3 Standard Split Unit
Specification
Upper part
Lower Part
Dimensions
Depth
930 mm
820 mm ***
Width
2,320 mm
1,900 mm
Weight
~550 kg
~330 kg
Height*
1,600 mm + ~500 mm
Air distribution module (adjustable)
900 mm
Coverage Area **
Up to 4,000 m2
Temperature Operation
Range
10°C –25°C
Water Condensation
(@18°C and 80% RH)
45 L/h
Electricity Requirements
3-phase, 32 Amp, 400 V, 50 Hz
Electricity Consumption
(@18°C and 80% RH)
10 kWh
Air Flow
~22,000 m³/h
Refrigerant Type
R507
Note
Max. distance between unit upper and lower units:
4 meters.
** Exact height can be specifically adjusted
*** Depends on the crop
****Can be shorter- depends on the requirements
4.1.2.4 Small Split Unit
Specification
Upper part
Lower Part
Dimensions
Depth
920 mm
820 mm ***
Width
2,300 mm
1,655 mm
Weight
~330 kg
~325 kg
Height*
1,160 mm + ~500 m
Air distribution module (adjustable)
900 mm
Coverage Area **
Up to 2,000 m2
Temperature Operation Range
10°C –25°C
Water Condensation
(@18°C and 80% RH)
24 L/h
Electricity Requirements
3-phase, 24 Amp, 400 V, 50 Hz
Electricity Consumption
(@18°C and 80% RH)
6 kWh
Air Flow
~12,000 m³/h
Refrigerant Type
R507
Note
Max. distance between unit upper and lower units:
4 meters.
** Exact height can be specifically adjusted
*** Depends on the crop
****Can be shorter- depends on the requirements

DryGair Dehumidification Unit
Installation
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4.1.2.5 Standard Unit with Heating & Cooling
Specification
Value
Dimensions
Depth
930 mm
Width
2,320 mm
Weight
~825 kg
Height*
2,360 mm + ~500 mm
Air distribution module
Hot water pipe connection
300 mm
Coverage Area **
Up to 4,000 m2
Temperature Operation Range
10°C –25°C
Water Condensation
(@18°C and 80% RH)
45 L/h
Electricity Requirements
3-phase, 32 Amp, 400 V, 50 Hz
Electricity Consumption
(@18°C and 80% RH)
10 kWh
Air Flow
~22,000 m³/h
Refrigerant Type
R507
** Exact height can be specifically adjusted
*** Depends on the crop
4.1.2.6 Small Unit with Heating & Cooling
Specification
Value
Dimensions
Depth
920 mm
Width
2,300 mm
Weight
~600 kg
Height*
2,030 mm + ~500 mm
Air distribution module
Hot water pipe connection
300 mm
Coverage Area **
Up to 2,000 m2
Temperature Operation Range
10°C –25°C
Water Condensation
(@18°C and 80% RH)
24 L/h
Electricity Requirements
3-phase, 24 Amp, 400 V, 50 Hz
Electricity Consumption
(@18°C and 80% RH)
6 kWh
Air Flow
~12,000 m³/h
Refrigerant Type
R507
** Exact height can be specifically adjusted
*** Depends on the crop

Installation
Site Preparation
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4.1.2.7 Standard Split Unit with Heating & Cooling
Specification
Upper part
Lower Part
Dimensions
Depth
930 mm
820 mm
Width
2,320 mm
1,900 mm
***
Weight
~600 kg
~330 kg
Height*
1,740 mm + ~500 mm
Air distribution module (adjustable)
900 mm
Hot water pipe connection
300 mm
Coverage Area **
Up to 4,000 m2
Temperature Operation
Range
10°C –25°C
Water Condensation
(@18°C and 80% RH)
45 L/h
Electricity Requirements
3-phase, 32 Amp, 400 V, 50 Hz
Electricity Consumption
(@18°C and 80% RH)
10 kWh
Air Flow
~22,000 m³/h
Refrigerant Type
R507
Note
Max. distance between unit upper and lower units:
4 meters.
** Exact height can be specifically adjusted
*** Depends on the crop
****Can be shorter- depends on the requirements
4.1.2.8 Small Split Unit with Heating & Cooling
Specification
Upper part
Lower Part
Dimensions
Depth
920 mm
820 mm
Width
2,300 mm
1,655 mm ***
Weight
~550 kg
~325 kg
Height*
1.30 m + ~0.5 m
Air distribution module (adjustable)
900 mm
Hot water pipe connection
300 mm
Coverage Area **
Up to 2,000 m2
Temperature Operation Range
10°C –25°C
Water Condensation
(@18°C and 80% RH)
24 L/h
Electricity Requirements
3-phase, 24 Amp, 400 V, 50 Hz
Electricity Consumption
(@18°C and 80% RH)
6 kWh
Air Flow
~12,000 m³/h
Refrigerant Type
R507
Note
Max. distance between the unit upper and lower
units: 4 meters.
** Exact height can be specifically adjusted