Zero GR250BC Manual

Installation, Service and User
INSTRUCTIONS
ZERO MODEL: GR250BC
L.P. Gas Double Lid Bottle Cooler
Z RO APPLIANC S (PTY) LTD
Cat. I
3+ (28–30/37)
& I
3B/P (30)
WARNING: THIS APPLIANC MUST B ARTH D
ENSURE THAT THE GAS SUPPLY HOSE IS NOT IN
CONTACT WITH OR NEAR THE BURNER BOX

Page 1
T CHNICAL DATA
Zero Appliances Model GR250BC
Category:
I
3+ (28-30/37)
For use on Butane at 2.8 - 3.0 kPa
and Propane at 3.7 kPa.
I
3 B/P (30)
For use on Butane and Propane
mixtures at 3.0 kPa
Declared Rate: Injector size 0. 2mm diameter, marked ‘13’ or 0
Gas consumption: 3 .2 g/h
lectrical Supply (optional): 230V 0.320kW
WARNING: THIS APPLIANC MUST B ARTH D
ENSURE THAT THE GAS SUPPLY HOSE IS NOT IN
CONTACT WITH OR NEAR THE BURNER BOX
Manufactured in South Africa by:
Zero Appliances (Pty) Ltd.
P.O. Box 426
Edenvale 1610
Gauteng Province

Page 2
INSTALLATION INSTRUCTIONS:
IMPORTANT INFORMATION FOR THE USER
This appliance ma onl be installed b a registered LP Gas installer. All registered installers
are issued with a card carrying their registration number. Ask to be shown the card before allowing
the installation work to commence and make a note of the Installer QCC number. Upon completion
of the installation, the installer is required to explain the operational details of the appliance together
with the safety instructions. ou will be asked to sign acceptance of the installation and be provided
with a completion certificate. ou should only sign for acceptance of the installation when the
installation is completed to your satisfaction.
Note that your invoice is required in the event that you wish to make a guarantee claim.
IMPORTANT INFORMATION FOR THE INSTALLER .
This appliance may only be installed by a LP gas installer registered with the Liquefied Petroleum
Gas Association of Southern Africa. The appliance must be installed in accordance with the
requirements of SANS 10087-1 and any fire department regulations and/or local bylaws applicable
to the area. If in doubt check with the relevant authority before undertaking the installation. Upon
completion of the installation you are required to fully explain and demonstrate to the user the
operational details and safety practices applicable to the appliance and the installation.
NSUR THAT TH FR Z R IS STANDING L V L!
1. Place the freezer in a cool, well-ventilated area out of direct sunlight and strong
gusts of wind, allow enough space (at least 100mm) around sides and back of
cooler and 600mm above.
2. Use spirit level provided and place it in the center of a closed lid.
3. If positioning on uneven or soft ground, place two flat pieces of wood or suitably
hard material (approximately 600mm long and 100mm wide by 20mm thick) under
the two feet of the freezer, from front to back, before attempting to level the freezer.
. Remove all loose items from cooler.
IMPORTANT: There must be adequate space to reach the controls situated at the back
of the cooler easily.
NOT : Any gas supply cylinder should have at least 250mm clearance if placed behind
the cooler.

Page 3
GAS CONN CTION:
The appliance inlet is to the 8mm plain straight tube, allowing connection by means of a
gas-tight compression fitting to comply with both EC and local regulations. The cooler is
suitable for connection to butane at 2.8-3.0 kPa and to propane at 3.7 kPa. Means must be
provided to turn off the gas supply. If the supply is common to other appliances, a separate
tap must be fitted for the cooler line.
GAS-PR SSUR R GULATOR
This appliance requires an operating pressure of 2,8 kPa at the appliance. A suitable LPG
regulator that complies with the requirements of SANS 1237 must be installed.
LP. GAS OP RATION:
After initial installation, after changing gas cylinder, after servicing, etc., the gas pipes may
contain some air, which should be allowed to escape by briefly pressing on the safety
valve knob (A). This will ensure that the flame lights quickly. Don’t place the cylinder and
pipe near or on the side of the burner.
Do not press knob A for more than 15 seconds – see Users note.
BURN-BACK (FIR IN BURN R TUB OR CHAMB R)
In the event of a burn-back (where the flame burns back to the jet) immediately turn off the
gas supply at the control valve on the panel. After ensuring the flame is extinguished, re-
light the appliance in the normal manner. Should the appliance again burn back, close the
control valve and call a service technician. Do not use the appliance again until the service
technician has declared that it is safe to do so.
WARNING
This appliance consumes air (oxygen). Provide ample ventilation especially when sleeping.
Do not use this freezer in unventilated structures to avoid endangering your life. Provide
additional ventilation for any additional fuel burning appliances and additional occupants.
Always ensure nothing is covering or blocking the flue. (Chimney)
FOR YOUR SAF TY
If you smell gas:
1. Open windows.
2. Do not touch electrical switches.
3. Extinguish any open flames.
. Do not check for leaks with an open flame.
5. Do not smoke while checking for leaks.
6. Immediately call your gas supplier.
Do not store or use gasoline or other flammable vapour and liquid in the
vicinity of this or any other appliance.

Page
OP RATING INSTRUCTIONS FOR COOL R
It is important to read through these instructions carefully before operating the cooler.
This instruction manual should be kept in a safe place for future reference.
GAS TH RMOSTAT OP RATION
US R OP RATING INSTRUCTIONS
Note: Appliance cannot be run off 2 heat sources at the same time.
TO START GAS OP RATION
1. Open the shut-off valve for the gas bottle (check that there is enough gas).
Open any shut-off valve of the gas installation.
2. Open flap B.
3. Keep the flame failure device knob (A) pressed in for approximately 15 seconds.
. Release for 10 seconds, strike match and insert into flap hole. Press (A) again.
5. Keep the knob (A) pressed in for a further 15 seconds then release it. If the flame
goes out, repeat steps 2, 3 and until the flame stays alight.
To terminate the gas operation turn off the shut-off valve on the gas bottle.
On starting the cooler, it will take a few hours to start becoming cold.
 Once the burner (B) has been lit turn the gas thermostat (C) to position ‘7’ for
maximum cooling (clockwise).
 By adjusting the thermostat (C) knob down from position ‘7’ you can regulate the
temperature you desire in the bottle cooler.
NOTE: The gas safety valve knob (A) should never be depressed for periods longer than
15 seconds with the burner unlit, as this can cause a potentially dangerous build-
up of unburnt gas. If the burner does not ignite, allow sufficient time for any
unburnt gas to disperse, then repeat the ignition steps.

Page 5
TROUBL SHOOTING
IF TH COOL R FAILS TO WORK
:
Check the following points before calling for service:
1. That the instructions for starting the cooler have been followed.
2. The cooler is level.
3. If the cooler fails to work check:
a) That the gas bottle is not empty.
b) That all LP gas valves are open.
c) That the regulator is not faulty.
d) If another appliance is connected to the same supply, check if it works properly.
IF TH COOL R IS NOT COLD NOUGH IT MAY B B CAUS :
1. The ventilation of the absorption unit is inadequate. Allow at least 100mm around
the back and sides of the cooler and 600mm above.
2. The evaporator is frosted up – see Defrosting.
3. The gas pressure is incorrect – check the pressure regulator at the gas cylinder or
the orifice (7) of the burner. If the orifice (7) is blocked, remove orifice, clean with
alcohol or other solvent and blow through with compressed air. Never use a piece of
wire or a pin. Check that you have the correct regulator for the cylinder (2.8-3.0 kpa
butane, 3.7 kPa propane). Check that you have not run out of gas.
. The ambient temperature is too high.
5. Too many products are loaded into the cooler at one time.
6. The lid is not properly closed or the lid seal is defective.
7. The baffle has not been inserted into the chimney. (factory fitted).
8. The absorption unit is leaking. A leak can be determined in the case of a visible leak,
by traces of yellow deposit at the point where the ammonia is escaping. If there
is a leak on the evaporator inside the cabinet, a smell of ammonia may be noticeable.
If a leak is detected, under NO circumstances should you try to repair it, as the unit is
pressurized with hydrogen and may explode if welding is attempted on the leak. Call a
qualified service technician. Turn off the gas or electric supply, and then empty the
cooler. If it is in a small room or in sleeping quarters or the smell of ammonia persists
remove the appliance. Do not try to use it.
9. If the flame fails to stay alight after releasing the fail-safe valve knob according to the
instructions, there may be two faults, these being:
a) The magnet in the fail-safe valve is faulty.
b) The thermocouple feeler point (8) may not be in the flame properly.
To rectify this, loosen the bottom nut to the feeler point and push forward until the
point is over the burner, and then tighten the top nut on the feeler point.
Repeat starting instructions.
Repeat lighting procedure. If still fails contact a service agent as the valve may be
faulty or the flame detector misplaced.
10. If the cooler is still not working properly, call a qualified service technician to repair
it.

Page 6
SOM US FUL HINTS
Make sure that:
1. Defrosting is carried out periodically.
2. The cooler is clean and dry with the lid open when it is not to be used for some time.
If the appliance is fitted with a locking device – remove key to prevent accidental
locking.
3. Liquids or items with strong odours are well packaged.
. The ventilation of the absorption unit is not obstructed.
5. You do not touch the absorption unit while it is in operation as parts of it will be
extremely hot.
6. You check the condition of the gas supply tube regularly:
a) End fitting in good condition.
b) Overall appearance etc.
7. You have switched on the cooler for approximately 12 hours prior to loading it with
products.
8. Hot liquids are not introduced into the cooler, allow to cool first.
9. You are aware that the temperature inside the cooler can vary according to the
ambient temperature, the location of the cooler, the frequency with which the lid is
opened, and the volume and concentration of products stored in it.
10. You avoid packing products in too tightly – air must be able to circulate freely.
11. For the safety of children keep the key out of reach at all times.
12. It is recommended that a yearly service check be carried out by a suitably qualified
person.
CL ANING YOUR COOL R

Clean your cooler using ½ a litre of warm water and a level table spoon of bicarbonate
soda.

Soak a soft cloth in the solution, wring it out, and use it to clean out the interior of the
cooler and its fittings.

Do not use wax polish, scouring powder, strong scented products or household
cleaners and detergent to clean the interior of the cooler as they may damage the
surface and leave a strong odour.

The exterior of the cooler should be wiped clean now and again using a damp cloth
and a small quantity of detergent. But not the lid seal which should only be cleaned
with soap and water and then thoroughly dried. The absorption unit behind the cooler
should be cleaned with a brush from time to time, but make sure that the cooler is
switched off when doing this.

Page 7
D FROSTING

Frost may gradually accumulate on the cooler surface. It must not be allowed to grow
thick as it acts as an insulator and adversely affects cooler performance.

Check the formation of frost regularly and when it gets around 5mm thick, defrost the
cooler.

To defrost the cooler, turn it off and remove all food items.
WARNING:
 Do not try to accelerate defrosting by using any ind of heating appliance, as this might
damage the plastic surface of the cooler. Neither should any sharp object be used to
scrape off the ice.
 Once defrosting is finished clean the interior thoroughly.
PROLONG D STORAG
 Disconnect the gas supply.
 Empty the cooler. Defrost and clean it thoroughly as described earlier.
 Leave the lid partially open to prevent any odours and moulds forming.
IMPORTANT:
 Be ore using the cooler again, ensure that no oreign bodies are present in the chimney, or the
burner (dust, insect, nests, waste paper etc.)
WARNING:
The needle valve screw used for admitting the ammonia / hydrogen filling charge to an
absorption unit is fitted to the unit’s reservoir. It is a strictly applied provision of the
guarantee extended on the unit to the customer, that any interference with the filling valve
screw will automatically void the guarantee. The absorption unit must not be opened, since
it contains corroding chemicals under high pressure.
S RVIC NOT S
ROUTIN MAINT NANC
It is recommended that a suitably qualified person service this appliance at
least once a year.
- Inspect the gas hose for cracks and chafing marks. Test all connections
with a suitable solution, do not use an open flame.
- Check there is no smell of ammonia or any signs of green/yellow crystal-like
deposits on the cooling unit tubes. Smell or deposits indicate a leaking unit
– see User instructions.
- Check the functioning of the flame failure control – adjust if necessary.
- Check the functioning of the ignition device if fitted – adjust if necessary.
- Check that the control knobs turn freely.
- Examine the burner flame – ensure burning with a sharp blue flame and no
yellow tipping or sooting.
- Check the door/lid seals are in good condition.

Page 8
IN TH V NT OF FAILUR
If the burner will not light:
- Check adequate gas supply – through to the burner.
- Depress flame failure device for 15sec and try lighting with a match. This
must be done in a well ventilated area!
- Check injector is clean – if not, clean with solvent and blow dry. Do not try to
clean with pin or similar sharp object.
- If the burner will not stay alight, check position of the flame detector head,
and the functioning of the safety valve.
If not cold enough:
- Check through points listed under Troubleshooting.
- In the unlikely event of cooling unit failure, contact the national distributor
without delay.
IMPORTANT NOT
If there is a smell of ammonia, advise the user to turn off the appliance, clear
out all the food and remove the appliance from dwelling areas.
WARNING: THIS APPLIANC MUST B ARTH D
ENSURE THAT THE GAS SUPPLY HOSE IS NOT IN
CONTACT WITH OR NEAR THE BURNER BOX

Page 9
TH RMOSTATICALLY CONTROLL D GAS BURN R PARTS LIST
WARNING: THIS APPLIANC MUST B ARTH D
ENSURE THAT THE GAS SUPPLY HOSE IS NOT IN
CONTACT WITH OR NEAR THE BURNER BOX
1. SANS BRASS HOSE TAIL.
2. GAS THERMOSTAT.
3. CAPILLARY WIRE.
. FLAME FAILURE DEVICE.
5. M10 NUTS.
6. M10 x 3/8 UNF JET HOLDER.
7. M10 x 1 JET RETAINER.
8. THERMOCOUPLE.
9. MIXING TUBE BRACKET.
10. MIXING TUBE.
11. BURNER BOX.
12. BURNER COVER.
13. HEAT SHIELD.
1 . RETAINER SCREW.

Made in South Africa
(Pty) Ltd