Dulas VC60SDD User manual

DULAS Solar Direct Drive
VC60SDD Refrigerator
User’s Manual
Ref: MU-VC60SDD-ENG-A

VC60SDD User’s Manual
Page 2 of 18
Table of Contents
1. Components Checklist………………………………………………………………. 3
2. Safety Instructions……………………………………………………………………... 4
3. Your Dulas Solar Powered Direct Drive Vaccine Refrigerator……………………… 5
4. Refrigerator Components………………………………………………………………. 6
5. Material Safety Information…………………………………………………………….. 7
6. End of Life & Product Recycling……………………………………………………..8 - 9
7. Refrigerator Installation…………………………………………………………………. 10
8. Refrigerator Loading……………………………………………………………………. 11
9. Freezer Operation………………………………………………..………………………12
10. Status Light…………………………………………………………………………..……13
11. User Training…………………………………………………………………………….. 14
12. Maintenance Tasks……………………………………………………………………... 15
13. Spare parts………………………………………………………………………………..15
14. VC60SDD System Layout……………………………………………………….……. 16

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1. Components Checklist
Description Qty
Refrigerator
Solar Array
Mounting System
VC60SDD Refrigerator Cabinet 1
Refrigerator Baskets 4
Refrigerator Key 2
250W min Solar Modules 3
20m Pre-terminated 6mm 2 Solar Cable (+ve & -ve) 1 pair
Solar Connector – Branch Plug 2
Solar Connector – Branch Socket 2
Earthing Kit (incl. Earth Rod, 25m Earth Cable & Earth Clamp) 1
(A) End Clamp 34-43mm Set 4
(B) Mid Clamp 28-42mm Set 4
(C) Front fixed leg 3
(D) C-Rail 47-3 – 1530mm 4
(E) C-Rail 47-3 - 750mm (not used with VC60SDD system) 0
(F) Rear adjustable leg 3
(G) Rail connector set 47 2
Coachscrews, Rawlbolts, Washers. 2 pack
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. Cover solar modules before breaking any
electrical connections.
Electrical danger – under fault conditions high electrical currents
can occur. Never bypass a system fuse and always replace with the
same type and rating.
DC power only - this refrigerator is designed for operation with the
solar power system supplied. Do not connect the refrigerator to other
power supplies.

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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.

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3.
Your Dulas Solar Direct Drive Refrigerator
Congratulations on choosing the Dulas VC60SDD vaccine refrigerator and water pack freezer.
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 VC60SDD 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 renowned 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 shining 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 its cold store. Under normal
sunlight conditions (8 hours/day of solar irradiance >200W/m²) the refrigerator will take
approximately 7 days to fully charge the cold store and be ready for vaccine storage.
In the VC60SDD the freezer compartment is secondary to the vaccine compartment. It has its own
separate refrigeration circuit and we prioritise the operation of the vaccine compartment. The
freezer only runs when there is enough solar energy to power first the fridge compressor and then
the freezer. This means that in periods of very low sunshine you may not be able to freeze water
packs.
Recommended solar array
The VC60SDD has been designed to meet the World Health Organisations 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 600W solar array with a Voc not exceeding 45Vdc.

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4. Refrigerator Components
Dulas VC60SDD
Refrigerator
Fridge compressor
& controller
SDD Controller
Varistors
PV Switch
& MCB
Solar Connectors
Lockable Handle
Earth
connection
terminal
Freezer
compressor
& controller
Freezer switch
Freezer compartment with
foam lid
Baskets
Vaccine compartment
(solar powered temperature
display)
Solar powered
temperature
displays

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5.
Material Safety Information
THE REFRIGERATOR
The Dulas VC60SDD 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.
May be fatal if swallowed and enters airways.
IF SWALLOWED: Immediately call a POISON CENTRE or doctor/
physician.
DO NOT induce vomiting.
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 inform authorities. Avoid water ingress underground
and do flush into surface water or sewer system.

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6. End of Life & Product Recycling
PACKAGING
The packaging is made from recyclable / reusable materials and should be brought to an official
recycling centre. The materials used are:
 Heat treated (HT) timber, certified by UK Forestry Commission (ISPM No. 15 Mark)
 Corrugated cardboard / Cardboard
 Polyethylene plastic
 Moulded polystyrene parts
 Steel reinforcing straps
WARNING – Keep packaging away from children - danger of suffocation from plastic!
WORN OUT REFRIGERATOR
The refrigerator still contains valuable materials and is not to be disposed of in the normal
household waste.
 Ensure that the cooling circuit of the worn out device is not damaged when being
transported.
 Information on the coolant used is on the type plate on the back of the refrigerator.
 The walls of the refrigerator contain an organic phase change material that can be harmful
and must be disposed of safely. Please contact Dulas for advice.
 Worn out devices must be professionally disposed of in accordance with local regulations
and legislation.
Potentially hazardous components / materials are:
 Refrigerant gas (R600a)
 Phase change material (PCM) - paraffin, normal C5-20
 Electrolytic capacitor
 Electronic components – SDD controller
Compressor controller
Refrigerator compartment temperature display
Disposal of Phase Change Material (PCM)
The PCM used in the Dulas refrigerator has a very long life and does not degrade through use. At
the end of the refrigerators useful life the PCM should be either recycled or disposed of in
accordance with applicable regional, national and local laws and regulations. Contact your local
waste disposal authority for advice. The product can be incinerated in accordance with local
regulations. In the EU it has a Waste Disposal Code (EWC): 13 08 99 oil waste not otherwise
specified.

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SOLAR POWER SUPPLY
Do not dispose of this equipment with normal domestic waste!
To comply with the European Directive 2002/96/EC on Waste Electrical and Electronic Equipment
and its implementation as national law, electrical equipment that has reached the end of its life
must be collected separately and returned to an approved recycling facility. Any device that you no
longer require must be returned to our agent, or find out about the approved collection and
recycling facilities in your area.
Ignoring this European Directive may have potentially adverse effects on the environment and
your health!
Solar modules contain materials that can be recovered and reused in either new PV modules or
other new products. Industrial recycling processes exist for both thin-film and silicon modules.
Materials such as glass, aluminium, as well as a variety of semiconductor materials, are valuable
when recovered.

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7.
Refrigerator Installation
DO NOT position the refrigerator in direct sunlight or next to any heat sources. Make sure the
refrigerator is positioned to provide good ventilation and ease of access for maintenance.
Ventilation is particularly important for the condensers and compressors.
1) Position the refrigerator on a level surface; wipe all internal and external surfaces with a
clean cloth.
2) Check the PV isolator at the back of the
cabinet is in the “0” position.
3) Check the freezer switch on the back left of
the cabinet is in the “0” position
4) Plug the solar connectors into the
refrigerator. Check that there is sufficient
slack in the cable to allow access to the
back of the refrigerator.
5) Turn the PV isolator on by switching it to “1”.
Within 1 minute the compressor will start if
there is sufficient sunlight (solar irradiance of
>125W/m²). You will be able to hear the
compressor operating and feel the
condensers getting warm.
6) Turn the freezer switch to “1”. Within 1
minute the second compressor will start if there
is sufficient sunlight (solar irradiance of
>250W/m²). You will be able to hear the
compressor operating and feel the condensers
getting warm.
7) Check that the refrigerator compartment
temperature display on the front of the cabinet is
operating. If there is insufficient natural light
shine a torch on the display for a few seconds.
8) Ensure that all baskets are in position
and the refrigerator lid is firmly closed.
9) Check that all cables are securely
supported so that they will not be pulled loose if
the refrigerator is moved for cleaning.
10) Roll the refrigerator into its final position and apply the brakes on the castors to secure it.

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8. Refrigerator Loading
IN ORDER TO KEEP INTERNAL TEMPERATURES OPTIMUM AND MINIMISE ENERGY
CONSUMPTION, ONLY OPEN THE LID WHEN STRICTLY NECESSARY.
The VC60SDD refrigerator has two refrigerated compartments. The large one is specifically for the
storage of vaccines and the smaller one with the fan is the freezer, see Section 4. The vaccine
compartment is designed to maintain a stable temperature between +2oC and +8oC across an
ambient temperature range from +5oC to +43oC. There are no points within the vaccine
compartment that drop below freezing and thus no danger of freezing vaccines.
The vaccine compartment contains stacking baskets designed to make stock management easier
and encourage air circulation within the compartment. The wire baskets encourage the circulation
of air by maintaining a small gap between the basket and the cabinet wall. Good air circulation will
help the refrigerator to maintain an even temperature throughout the compartment.
In order to save energy, try to keep the lid open for as short a time as possible.
Stock management
 Allocate a certain space for each different type of vaccine, so that they may be located rapidly.
 Check the vaccine labels and adhere to any special requirements.
 Always use before expiry date (store older vaccines on top).
 Store the most frequently used vaccines in the top baskets for easy access.
WARNING: ALWAYS FOLLOW THESE VACCINE STORAGE GUIDELINES

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9. Freezer operation
The VC60SDD freezer is a highly efficient freezer designed specifically for freezing water packs for
vaccine distribution. It has a fan to maximise the cooling power and is able to rapidly freeze up to
2.4kg of water each day.
The refrigeration circuit of a solar direct drive freezer only runs during the day time when there is
enough sunshine. The VC60SDD is designed to prioritise keeping the vaccine compartment cold
over the freezing of water packs. The freezer only turns on when there is enough solar energy to
run first the fridge compressor and then the freezer. In low sunshine conditions it is normal for only
the fridge to keep running.
To freeze water packs simply place the required number of water packs in the freezer at the
beginning of the day and by the end of the day they will be frozen. The freezer is well enough
insulated that the water packs will remain frozen overnight.
The VC60SDD can be used to build up a store
of up to 23 x 0.6L water packs allowing
multiple outreach trips to take place in a short
time. Simply add 2.4kg of water packs each
day until the desired amount of ice has been
accumulated.
The VC60SDD has an intelligent controller that automatically ensures the operation of the freezer
never endangers the safe storage of the vaccines in the fridge. There is also an on / off switch on
the back of the cabinet.
There is no need to turn the freezer off unless for maintenance.
There is no risk of damage to the system by freezing too many water packs.
Tips to maximise the freezing power of the VC60SDD:
 Allow the freezer to run for 2 or 3 days before starting to freeze water packs.
 Use the foam lid: make sure it is always replaced securely.
 Use the basket provided in the freezer: this is designed to allow air to flow around the water
packs and ensures rapid freezing
 If there is a build-up of ice on the cabinet walls, turn the freezer off for a day until it has
melted. Keep the lid closed during defrosting!
 If water builds up in the bottom of the freezer there is a drain plug on the side.
Freezing capacity per day
Water pack volume Qty = 2.4kg
0.3L 8
0.4L 6
0.6L 4

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10. Status light
Status light
During the hours of daylight the green status light on the front of the cabinet should flash steadily
to indicate that the refrigerator is working correctly.
Important: The light does not give an indication that the correct vaccine storage temperature has
been reached. That is best found out by inspecting the fridge temperature display or measuring
the temperature directly.
The following table gives an indication of what the green light means and what actions should be
taken depending on its status.
Condition of
the green
status light
What it means Action
Flashing
Normal operation: Sufficient
sunshine and no faults indicated
by the controller.
Check the temperature of the refrigerator
and if within +2C to +6C then it is safe to
store vaccines.
Temperatures >6C indicate that the
refrigerator’s cold store is nearly empty.
Constantly on
Fault condition! If this condition persists for more than 5
minutes turn the PV off using the PV
isolator switch at the rear of the fridge.
Wait another 5 minutes and turn the PV
isolator back on.
Wait another minute. If the status light is still
permanently on seek technical help.
Off
Either there is not enough
sunshine / it is night time OR
If the sun is shining then there is a
fault with the system
Either wait for sufficient sunlight or call a
technician if in fault condition.

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11. User Training
The end user of the VC60SDD should be instructed in the simple processes outlined below and
also those in Section 22 Maintenance tasks. It should be stressed that these tasks are essential to
ensure correct and reliable operation of the refrigerator.
Caution: failure to follow these instructions may lead to system failure and vaccine
wastage.
If you have a problem, please contact your appointed engineer.
When turning on for the first time or when the refrigerator has been turned off for more than 3
days:
 Connect the solar panels and allow the refrigerator to run for at least 7 days.
 Before loading with vaccines, ensure that the temperature display on the front of the
refrigerator reads +4.5oC or less by 4pm in the afternoon.
Daily Routine
 Keep the lid closed, open only when required and lock after use.
 Store the most frequently used vaccines in the top baskets for easy access.
 Do not keep food or drink in the refrigerator.
Vaccine Storage:
 Only store vaccines in the refrigerator.
 Use the baskets provided: Do not store vaccines outside the baskets.
 Always store vaccine in its original packaging.
 Always keep the same type of vaccine together and store your vaccine neatly.
 Always use old vaccines before new ones; before use make sure the vaccine has not
expired.
Freezer operation:
 Designed to make 2.4kg of ice each day. Freezing more may be possible when very sunny.
 Use the foam lid, always replace it securely.
 Use the basket provided.
 Defrost the freezer if ice builds up on the walls (switch on the back to turn it off)

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12. Maintenance Tasks
Every morning and afternoon:
 Check the temperature
 Fill in the daily record sheet
On the first day of every week:
 Clean the solar array
On the first day of every month:
 Clean the refrigerator, condensers and compressors
 Check the solar array is not shaded between 7am and 5pm
 Defrost the freezer if there is a build-up of ice on the walls of the compartment
Every 6 months:
 Check all mechanical fixings and electrical connections (including the array)
13. Spare parts
Listed below are the most likely spare parts required by the VC60SDD over the course of its
lifetime. It is recommended that one set of these spares is purchased for every 10 refrigerators.
Qty Description
1 Dulas SDD controller
3 Temp probe
1 Compressor controller 101N0410
1 Compressor BD35K
1 Solar thermometer
1 Foam lid (freezer only)
1 Freezer fan
Any other parts required can be obtained by contacting Dulas on the details at the end of this
manual.

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14. VC60SDD System Layout

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For more information contact:
DULAS Ltd, Dyfi Eco Park, Machynlleth, Powys, SY20 8AX, UK
tel: [phone] fax: [phone]
email: [e-mail]
website: www.dulas.org.uk