Daikin GCU2020PXB1 Guide

Hubbard Products Ltd. 1-7 Bluestem Road,
Ransomes Europark, Ipswich, Suffolk, IP3 9RR UK
Tel: [phone]
email: [e-mail]
www.hubbardproducts.com
Hubbard Products Ltd
Hermetic R744 Condensing Units
Model Number:
GCU2020PXB1
ESIE20-02
Installation, Commissioning and
Maintenance Manual
Page 1 of 179
Copyright HPL March 2021
P41135 Rev 03

Hubbard Products Ltd. 1-7 Bluestem Road,
Ransomes Europark, Ipswich, Suffolk, IP3 9RR UK
Tel: [phone]
email: commerci[email protected]m
www.hubbardproducts.com
CONTENTS
1
EC Declaration of Conformity
2
Installation, Commissioning and maintenance
instructions
3
Material Safety data Sheets
4
Wiring Schematics
5
Pipework Schematics (P&ID)
6
Carel PR300T CO2 Controller manual and factory
settings
7
ABB Inverter non-default settings
8
Pressure & Enthalpy Diagram
9
Commissioning Form
10
ECO Design
11
Evaporator Installation Guide
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Hubbard Products Ltd. 1-7 Bluestem Road,
Ransomes Europark, Ipswich, Suffolk, IP3 9RR UK
Tel: [phone]
email: commerci[email protected]m
www.hubbardproducts.com
1. EC Declaration of Conformity
Model: GCU2020PXB1
Part Number: A10145-02M
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Hubbard Hermetic Rotary R744 Units
Installation, Commissioning and Maintenance
Manual
Model No.: GCU2020PXB1
ESIE20-02
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Contents
1. Safety recommendations
2. Storage
3. Description of the unit
4. Application
5. Handling
6. Post Transport Checks
7. Overall Dimensions
8. Serial plate Information
9. Installation Spacing
10. External Pipe and Electrical Connections
11. Basic Component layout
12. Mechanical Safety of the system
13. Commissioning and Maintenance
14. Service and Maintenance
15. Maximum Refrigerant Charge
16. Estimation of Refrigerant and Oil Charge
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These pages contain important safety information. Please read carefully before commencing any work on the
equipment to which the instructions refer.
It is assumed that installation, commissioning, service and maintenance activities must only be undertaken only by
competent personnel who have been trained for the activity. They should be familiar with this type of equipment
and the handling of refrigerants and their disposal.
1. Safety recommendations
When installing and using the unit please follow the recommendations listed here below.
•Installation shall be carried out in strict compliance with the diagrams and instructions supplied by the
manufacturer.
•Damages due to improper connections are excluded.
•The electric system available where the unit is installed shall meet the relevant standards in force.
•Maintenance shall be effected by trained personnel or by the manufacturer according to the provisions as per
EN378.
WARNING
Use safety gloves to protect your hands from possible cuts.
The user is strongly recommended to contact the manufacturer before attempting any intervention on the unit and
any use not corresponding to the manufacturer’s indications (in particular as for the field of application) and to
enquire about the possible dangers and contra-indications connected with an improper use of the machine.
•The unit shall be used following these instructions and sticking to the destination of use indicated by the
supplier. Any incorrect use can result in damages to the unit and represents a serious danger for people’s
health.
ATTENTION
The unit is not suitable for working in explosive environments.
Therefore the use of the unit in an explosion-dangerous atmosphere is absolutely forbidden.
When maintenance requires operations on the cooling circuit, drain the system and let it reach the
atmospheric pressure. Oil residuals left in the refrigerant receiver should be recovered and disposed of by
specialized firms, specially authorized by the national regulations in force.
ATTENTION
The unit is not suitable for working in salty environments. In such a case protect condenser
and evaporator with appropriate means.
•Only use refrigerant and oil as specified on the serial plate and this manual.
•No modifications or changes in circuit or components (such as: welding on compressor body, on refrigerant
receiver wall or on refrigerant separator wall) are allowed.
•Sight glasses, minimum level indicators and flanged couplings are secured to the receiver or the separator by
means of demountable fixing elements. As a rule, gaskets resist pressure, temperature and fluid stresses.
When fixing elements include gaskets (for example glass windows and flanges) however, reduced tightness
and bedding of gaskets can not be excluded due to their features; for this reason tighten them before and
possibly after starting. Driving torques can be different. On sight glasses (mounted on refrigerant receiver) use
a dynamometric wrench, otherwise the steel edge could be excessively loaded and cause glass breakage.
•Any official registration necessary for pressure appliances and repeated tests shall by governed by the laws
and regulations in force in the Country where the unit is installed. Compliance with laws, regulations and with
the technical instructions specified above falls within the manager’s responsibility.
•The final user shall protect the unit from external fire dangers.
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2. Storage
Equipment should be stored, prior to installation, in warm, dry conditions, free from dust, vibration and extremes
of temperature and humidity.
3. Description of the unit
Hubbard CO2 hermetic rotary series includes air-cooled condensing units. They consist of:
1. Condensing unit placed outside the cold room;
2. Electric control panel placed on the condensing unit.
4. Application
Under no circumstances must the equipment be used for any purpose other than that for which it
was specifically designed.
The equipment must be located on, and secured to a solid level base or framework designed for the purpose.
**Anti-vibration pads/feet are strongly recommended.
Access must be provided to allow safe working for both installation and servicing of all electrical and refrigeration
components. A safe exit path must be provided in the event of a mishap. During installation, the space must be
adequately ventilated to remove any potentially toxic/asphyxiating/explosive gases that may otherwise build up.
All pipework connected to the equipment must be adequately supported and all electrical components and supplies
connected to the equipment must conform to IEE regulations.
Refer to the individual electrical drawings supplied width the equipment for details of the electrical circuitry.
Extreme care should be exercised when opening any part of the refrigerant pipework to atmosphere for the
purpose of connecting pipework etc. The systems contain a positive pressure of inert gas, when despatched,
which will be released upon any breach of the equipment's pipework or pressure vessels.
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5. Handling
The unit shall be handled by appropriate lifting and transport means. An appropriate risk assessment should be
undertaken by a suitably qualified person before attempting to move or lift the equipment.
Make sure that no one is in transit in the operating area of the lifting/ transport means to
prevent any possible accidents to people.
If the unit is in a wooden case or crate, sling the packing properly before handling it.
Lifting speed shall be such as not to make the packed unit oscillate dangerously and
possibly fall.
6. Post Transport Checks
On siting the unit, we recommend the security of all electrical connections is checked, and system
flanges, rotalock valves, and flexible connections are secure. Where flexible hose lines are used please
ensure that the outer material is not subject to rupture due to contact with other surfaces.
Before initial operation we recommend that crankcase heaters are operated for 24 hours prior to
compressor operation to ensure correct lubrication properties are provided.
The units are factory tested including leak, pressure and electrical test – not running test. Anyway, is
highly recommend a further pressure test after transport and positioning to help prevent leakage in
operation. Pressure testing should be carried out according to your companies test procedures and
where applicable in accordance current P.E.D. recommendations, F-gas regulations and your customers
requirements.
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7. Dimensions and weights:
Models: GCU2020PXB1
7.1 Packaged Unit
7.2. Unit Dimensions
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