Dulas VC50SDD User manual

DULAS Solar Direct Drive
VC50SDD Refrigerator (E003/078)
Installation & Technician’s Manual
Ref: M-VC50SDD-ENG-F

VC50SDD Installation & Technician’s Manual
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Table of Contents
1. COMPONENTS CHECKLIST...................................................................................... 4
2. SAFETY INSTRUCTIONS........................................................................................... 5
3. YOUR DULAS SOLAR DIRECT DRIVE REFRIGERATOR......................................... 7
4. VC50SDD REFRIGERATOR COMPONENTS ............................................................ 8
5. RECOMMENDED TECHNICIAN’S TOOLS ................................................................. 9
6. MATERIAL SAFETY INFORMATION.........................................................................10
7. END OF LIFE & PRODUCT RECYCLING..................................................................11
8. REFRIGERATOR TRANSPORTATION......................................................................13
9. PREPARING TO INSTALL .........................................................................................14
10. SOLAR ARRAY ASSEMBLY...................................................................................15
11. SOLAR ARRAY ORIENTATION..............................................................................21
12. SOLAR ARRAY INSTALLATION.............................................................................22
13. SOLAR MODULE CONNECTIONS.........................................................................24
14. COMMISSIONING SOLAR ARRAY ........................................................................25
15. ADVICE ON LIGHTNING PROTECTION................................................................26
16. ADVICE ON SURGE PROTECTION.......................................................................26
17. SOLAR ARRAY EARTHING....................................................................................27
18. REFRIGERATOR INSTALLATION..........................................................................28
19. SYSTEM COMMISSIONING...................................................................................29
20. REFRIGERATOR LOADING...................................................................................30
21. GREEN COMPRESSOR STATUS LED LIGHT.......................................................31
22. USER TRAINING.....................................................................................................32
23. MAINTENANCE TASKS..........................................................................................32
24. TROUBLESHOOTING GUIDE ................................................................................33
25. INSTALLATION & COMMISSIONING RECORD.....................................................40
26. VC50SDD ELECTRICAL SCHEMATIC...................................................................43
27. VC50SDD REFRIGERATION SCHEMATIC............................................................44
28. SPARE PARTS........................................................................................................44
29. VC50SDD SYSTEM LAYOUT - 1 MODULE SYSTEM............................................45

VC50SDD Installation & Technician’s Manual
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VC50SDD Installation & Technician’s Manual
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1.Components Checklist
DESCRIPTION
QUANTITY
REFRIGERATOR
VC50SDD Refrigerator Cabinet
1
Refrigerator Basket
1
Refrigerator Key
2
SOLAR ARRAY
260Wp min Solar Module(s)
1
20m Pre-terminated Solar Cable (+ve & -ve)
1 pair
Solar Connector –Branch Plug (only required for 2 module systems)
0
Solar Connector –Branch Socket (only required for 2 module systems)
0
Earthing Kit (incl. Earth Rod, 25m Earth Cable & Earth Clamp)
1
MOUNTING SYSTEM (see page 14 for references A to G)
(A) End Clamp 34-43mm Set
4
(B) Mid Clamp 28-42mm Set
0
(C) Front fixed leg
2
(D) C-Rail 47-3 –1530mm
2
(E) C-Rail 47-3 - 750mm (only required for 2 module systems)
0
(F) Rear adjustable leg
2
(G) Rail connector set 47 (only required for 2 module systems)
0
Coachscrews, Rawl bolts, Washers
2 packs
Screws
1 pack
Wall Plugs
1 pack
Cable Ties
1 pack
Cable Tie Bases
1 pack
Silicon Sealant
1

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2. Safety Instructions
Read the Manual - please read all instructions completely
before installing. Installation and system servicing should only be
carried out by a qualified and competent engineer. Work
performed by persons with insufficient technical knowledge may
adversely affect the performance of the unit or cause physical
injury or damage to the equipment.
The refrigerator is not to be used by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given
supervision or instruction. Children must be supervised not to play
with the appliance. This refrigerator is for professional use only. It
is not designed for household use.
Refrigerator and power system are heavy - please observe
good manual handling procedures when moving the refrigerator
and solar power system. Only use suitable transport equipment.
Safe working - Please observe safe working at height practices
when installing the solar array.
Live electrical components –solar modules are live when
exposed to sunlight. Isolate the array (using the PV isolator on the
back of the refrigerator) before disconnecting any components.
Electrical danger –under fault conditions high electrical
currents can occur. Never bypass a circuit breaker and always
replace with the same type and rating.

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DC power only - this refrigerator is designed for operation with
the solar power system supplied. Do not connect the refrigerator to
other power supplies.
Dangerous substances - this refrigerator contains substances
that are not biodegradable and can cause harm, please ensure
that all components of the refrigerator are disposed of correctly,
see page 8 for more information. Do not damage the internal side
panels of the compartment.
Keep Dry –This refrigerator is for indoor use only. Do not
expose it to rain.
WARNING: This unit's cooling system contains flammable refrigerant. Due to this
fact, the following information is particularly important:
Warning: Do not damage the refrigeration circuit. Ensure that
sharp or pointed objects do not come into contact with the
refrigeration circuit.
Warning: Do not use mechanical devices or other means to
accelerate the defrosting process, other than those recommended
by the manufacturer.
Warning: Keep ventilation openings, in the appliance enclosure
or in the built-in structure, clear of obstruction.
Warning: Do not use electrical equipment inside the appliance.
Warning: Do not store explosive substances such as aerosol
cans with a flammable propellant inside this appliance.

VC50SDD Installation & Technician’s Manual
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3. Your Dulas Solar Direct Drive Refrigerator
Congratulations on choosing the Dulas VC50SDD vaccine refrigerator. With over 30 years of
engineering experience in the production of solar powered vaccine refrigerators, Dulas is
considered one of the market leaders in this field.
The VC50SDD is Dulas’ latest innovation in solar refrigeration. Using our new solar direct drive
technology we have replaced the traditional battery energy store with a ground breaking phase
change solution. With this new technology we can offer the same renown Dulas quality and
reliability that have always kept your vaccines safe, but in a simpler and more efficient package.
How does solar direct drive work?
When the sun shines the solar panels generate electricity which directly drives the refrigerators
compressor, cooling down the refrigerator and its contents. As a result the compressor only
operates during the day. To maintain the temperature at night or when the sun is not shinning the
refrigerator has a phase change lining. This interior lining holds the exact temperatures required
for safe vaccine storage and acts as a “cold store”, storing energy that keeps the temperatures
stable all day and night.
In order to store sufficient energy to keep vaccines safe for prolonged periods without any
sunshine, the refrigerator must be allowed time to charge it’s cold store. Under normal
sunlight conditions (8 hours/day of solar irradiance >250W/m²) the refrigerator will take
approximately 7 days to fully charge the cold store and be ready for vaccine storage.
Recommended solar array
The VC50SDD has been designed to meet the World Health Organisation’s Performance, Quality
& Safety (PQS) standards. The refrigerator has been independently tested to the PQS standard
WHO/PQS/E03/RF05 and is a Hot zone rated appliance with an ambient operating temperature
range of between +5C and +43C. For use in such Hot Zone environments it should be powered by
a minimum 260Wp solar array with a Voc not exceeding 45Vdc.

VC50SDD Installation & Technician’s Manual
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4. VC50SDD Refrigerator Components
Lockable Handle
Basket
Vaccine
compartment solar
powered temperature
display and
compressor status
LED
Temperature
sensors
Replaceable
gaskets

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5. Recommended Technician’s Tools
Pozidrive No.2 Screwdriver
Slot-head Screwdriver
Pliers
Wire Cutters
Craft Knife
Drill and Bits
Hammer and Punch
Deep reach 18mm socket (supplied)
Torx T30 key (supplied)
Torx T45 key (supplied
Ratchet socket handle (not supplied)
Adjustable Spanner
Multimeter (20A rated)
Tape measure
Spirit level
Compass (supplied)

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6.Material Safety Information
THE REFRIGERATOR
The Dulas VC50SDD conforms to the European directive 2002/95/EC on hazardous substances
and does not contain the following elements: lead, cadmium, mercury, hexavalent chrome, PBB or
PBDE.
The absence of ozone destroying materials is in accordance with EC 1005/2009 (CFC-free)
It is compliant with European Standards (CE) EN60335-1:2010 & EN60335-2-24:2010.
R600a refrigerant –Isobutane, is highly flammable when mixed with air. Do not inhale, ingest, and
avoid contact to skin. Ensure that any work carried out on the refrigeration circuit is done by a
competent refrigeration engineer.
THE PHASE CHANGE MATERIAL (PCM)
The refrigerator contains an organic phase change material (PCM) that provides the energy store
for the refrigerator. This PCM material is a paraffin wax that is liquid at room temperature and is
stored in large tanks secured inside the walls of the refrigerator. In normal use the user will never
be aware of its presence. This PCM is classified under regulation (EC) No 1272/2008 as a
category 1 aspiration hazard and is classified under regulation 67/548/EWG, 1999/45/EG as
having the potential to cause physical harm (R65 & R66). At normal ambient temperatures this
product will be unlikely to present an inhalation hazard because of its low volatility. At high
temperature aerosol/mist can cause an irritation of the respiratory tract.
H304 May be fatal if swallowed and enters airways.
P301 + P310 IF SWALLOWED: Immediately call a POISON CENTRE or
physician.
P331 DO NOT induce vomiting.
R65: Harmful: may cause lung damage if swallowed.
R65: Repeated exposure may cause skin dryness or cracking.
In the event of a PCM spillage:
•Wear suitable protective clothing, gloves and safety glasses when clearing up spillages.
•Use an absorbent substance such as sand to contain any escaping material.
•If the PCM contaminates rivers and lakes or sewers inform respective authorities. Avoid water
ingress underground. Do not flush into surface water or sanitary sewer system.