Boste UDC102 User manual

1
PRODUCT MANUAL
Boste BK Series
(UDC102 Undersink Dispenser Model)

2
Product
Manual
BK Series (UDC102 Models)
Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . Page 3
2. Specifications . . . . . . . . . . . . . . . . . . . . . . . Page 4
3. Main Components . . . . . . . . . . . . . . . . . . . . . . . Page 5
4. Installation Guide . . . . . . . . . . . . . . . . . . . . . . . Page 7
5. Operation Guide . . . . . . . . . . . . . . . . . . . . . . . Page 8
6. Maintenance Guide . . . . . . . . . . . . . . . . . . . . . . . Page 9
7. Fault Diagnosis Guide . . . . . . . . . . . . . . . . . . . . . . . Page 10
8. Diagrams & Parts Guide . . . . . . . . . . . . . . . . . . . . . . . Page 16

3
Introduction
Please Note: This Product Manual is intended for use by qualified Service Technicians only.
Use of the advice and material enclosed by the end-user could invalidate product warranty,
occupational insurances and present health and safety risks.
We strongly recommend that this Product Manual is not left with the dispenser or end-user but that
instead training is given regarding the simple function operations.
The Boste BK Series (UDC102 Model) is a range of undercounter water dispensers that are connected to the mains water
supply and dispense water through a proprietary swan-neck faucet that is mounted on a worksurface.
There are two models in the range:
BK5 –Cold & Ambient
BK9 –Cold, Sparkling & Ambient
Both models models have robust steel framed cabinets and attr activ el y injection moulded plastic front, side and top
panels.
An IEC Power Lead is supplied for connection to the IEC socket found on the rear of all models (An additional Schuko
type is supplied for the European mark et).
Both are Direct Chill cold water dispenser where water is used as the cooling medium in the Direct Chill tank.
This is automaticall y filled and controlled by the level control system upon installation. This tank is then chilled via
the outer e v a por a tion coil of the capillary controlled refrigeration compression sys tem. We recommend fitting a
Pr essure Reducing V a l v e is fitted to all supplies to regulate the pressure to 3.5 bar/355 kPa.
On the carbonated water model, water is chilled as it passes through the coil immediatel y before dispense or
being pumped under pressure into the carbonator which it fitted inside the same coil. The carbonator is also
level controlled and allows the sparkling eff ect to occur through saturation with CO2.
Dispense is at inlet pressure and controlled via the solenoid v a l v es.
The Cold T e mperatur e is thermos taticall y controlled via the adjustment screw on the back of the machine. This
setting is factory set and is not necessary to adjust in most cases
The Cold Tank can be drained via the two Drain Port on the rear of the machine.
The level control system also incorporates a leak detection device within the cabinet which switches the
machine off in the event of detecting wate r .

4
Specifications
COOLING SYSTEM
High efficiency compression system with capillary control.
Premium quality long life hermetic compressor. Compact
internal condenser –fan assisted for greater efficiency.
Environmentally friendly R134A refrigerant.
3.5 litre stainless steel chiller tank with level control containing
stainless steel cold water direct chill coil.
Stainless steel carbonator tank with independent level control
fitted inside coil.
High capacity, low voltage diaphragm pump feeding
carbonator on sparkling water machine option.
COLD TEMPERATURE
2°C to 11°C.
THROUGHPUT PER HOUR
18 litres cold < 12°C / 16 litres sparkling <12°C.
DISPENSE
Swan Neck Faucet with ergonomically designed and
situated light touch sensitive controls.
MAXIMUM RUNNING
POWER CONSUMPTION
85-100 watt. Cooling. (Additional intermittent carbonation
usage).
POWER REQUIREMENTS
230 volt/50Hz 16A supply required.
POWER SUPPLY
IEC Power FusedSocket.
WATER CONNECTION
Mains in (3.5bar max) - 1/4” Push Fit/Faucet - 6mm Push Fit .
CO2 CONNECTION
1/4” Push Fit.
UNDERCOUNTER
DIMENSIONS
(w x d x h) 230 x 360 x 390mm
WEIGHTS
BK5 (M102)
Unit only - 15.0 kg/Faucet - 1.3kg
BK9 (M102)
Unit only - 17.1 kg/Faucet - 1.3kg

Boste BK Series
5
Threaded Stem & Back Nut
Main Components
Undersink Unit
BK5 Cold & Ambient BK9 Cold, Sparkling & Ambient
1no UDC102A Undercounter Unit 1no UDC102AS Undercounter Unit
Complete with: Complete with:
1no 2.0m Power Cordset 1no 2.0m Power Cordset
1no 1.0m Faucet Connection Harness 1no 1.0m Faucet Connection Harness
1no CO2 Regulator with gauge
Electronic Swan Neck Faucet
1no Electronic Swan Neck Faucet 1no Electronic Swan Neck Faucet
Complete with: Complete with:
2 - Button Membrane Switch 3 - Button Membrane Switch
1.0m x 6mm Insulated Water Pipe 1.0m x 6mm Insulated Water Pipe
Also included: Also included:
2.0m x 1/4” Faucet Connection Pipe 3.0m x 1/4” Faucet Connection Pipe
1.0m Faucet Connection Pipe Insulation 2.0m Faucet Connection Pipe Insulation
2no ¼1/4” Stem Elbow 5no ¼1/4” Stem Elbow
1no 1/4” Y Fitting 1no 1/4" Cross Fitting
1no 1/4" Male Threaded Adaptor 1no 1/4" Male Threaded Adaptor
1no 6mm Female Threaded Adaptor 1no 6mm Female Threaded Adaptor
Mains Installation Kit & Filters:
These are supplied as extra items according to individual ordering requirements
Top Panel
Side Panel
Front Panel
LED
Indication
Panel
On/Off Mode Switches
Power in
Thermostat
Water in & CO2 in
connections
Faucet
Connection
Water out connections
Swan Neck
Button
Switch
Panel
Ambient
Sparkling
Cold
Water Pipe
Elec
Connection
Back Panel

Boste BK Series
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Installation Guide
1. Unpack both the undersink unit and the swan-neck faucet, checking the main components are present as per the
lists above. Dispose of the packaging in a responsible manner. Please note regarding any Mains Installation parts.
2. Check the thermostat set point of the undersink unit.
It should be preset to the following position:
-C
NB: Turn clockwise to decrease water temperatur e
3. Identify a suitable location for the unit. It should be positioned within 1.0m of the faucet, and within 2.0m of a
suitable services connections:
Water: Mains potable water –2.0bar recommended. Min 1.0bar
Electricity: 16A supply –Earth Leakage Protected.
Always install internally. Do not expose to dampness or moisture. There should be 150mm minimum behind the
unit, 25mm min each side and 100mm above. Always ensure there is adequate airflow around the unit.
Additional ventilation grills or extraction may be required.
When planning and providing for the connection to the services, always allow for easily accessible service
isolator fittings and for the position of an external water filter.
Allow also for the CO2 cylinder when installing a carbonated model.
4. Provide service connections as required.
5. Position the unit in place, ensuring it is level and stable.
6. Connect to the water supply. The maximum recommended inlet pressure is 3.5bar.We recommend fitting a check
valve, a pressure reducing valve and a „Waterbock‟ device. (These are available as part of our optional
Installation Kit). When fitting a Waterblock device we recommend a minimum setting of „2‟ be used. Pre-flush and
fit the filter in an accessible position and always allow adequate connecting pipe length to enable the unit to be
sufficiently moved for any future disconnection. Do not turn the water supply on at this stage.
7. Identify a suitable position for the swan neck faucet. A 33-35mm (max) hole is required. When positioning to
drain over an existing sink bowl, allow for the reach of the swan neck or otherwise the position of any optional
drip tray. Also allow for the height of the swan neck under any overhanging cupboard/shelf and for the space
needed for forming the needed hole. Relate the selected position to the undersink of the worksurface and check
for any obstructions. Allow sufficient space for fitting a back nut to the faucet stem.
8. Carefully form the needed hole, using the correct type of cutter for the worksurface material. Observe all local
occupational health and safety requirements.
9. Remove the back nut and washer from the faucet and carefully feed the connecting pipe tail and ribbon cable
through the hole formed in the worksurface. There is an integrated sealing O ring pre-fitted in the base of the
faucet but it may be necessary to apply a thin bead of silicone sealant also.
10. With the faucet membrane switch in the right position, carefully refit the back washer and nut. Take care not to
overtighten.
+C

Boste BK Series
7
2no
Adaptors
5no Stem
Elbow
Insulated Faucet Pipe
11. Connect faucet pipework as follows:
Cold & Ambient Model: Cold, Sparkling & Ambient Model:
-Fit Stem Elbows directly to water outlets on back of unit.
-Fit 30mm pieces of pipe to each.
-Fit Y or Cross Fitting.
-Fit 30mm piece of pipe
-Fit male threaded adaptor fitting
-Fit female threaded adaptor fitting
-Connect to insulated faucet pipe
12. (Sparkling Model only). Unpack CO2 Regulator and fit elbow fitting to spigot outlet. Check the control knob is oin
the fully closed position (anticlockwise). Carefully screw fit to a new, full CO2 single use cylinder ensuring the
small pressure relief vent in the stem is facing away from you or anyone else. Hand tighten securely. Connect to
the CO2 inlet on the back panel using the required length of ¼1/4” pipe. Stand cylinder in a suitable place.
13. Fit optional Drip Tray at this stage (if selected)
14. Turn on the water supply and check for any leaks.
15. Connect the IEC power cordset to the electricity supply. The Direct Chill system should now be heard to begin
filling. This may continue for a few minutes depending upon water pressure. (NB: Any immediate whining noise
from the DC pump should soon stop as the water level in the system rises).
16. Upon the filling cycle completing, proceed to flush the cold and the ambient water channels using these buttons on
the faucet control panel. We recommend that a minimum of 10lts is flushed through the unit*. (Cold approx. 8 lts
and Ambient approx. 2 lts). Switch on the Cooling Mode and allow up to 1 hr for the initial cooling cycle.
17. (Sparkling Model only). Switch on Sparkling Mode and allow the carbonation tank to fill. (The carboanntion pump
will run for approx. 15-20 secs). Upon completion, open the CO2 Regulator Knob and set initially to 5 bar. Flush
through approx. 10 lts of water using the sparkling button*. Depending on the inlet water pressure, you may have
to pause approx. every 500ml to allow the carbonation tank to refill. Reset the CO2 pressure to the required level.
We recommend 3-5bar (max) depending on individual requirements. Allow up to 1 hr for carbonation to develop.
*NB: The integrated leak prevention control will prevent any continuous dispense of >60 secs and could occur
while carrying out this prolonged dispensing. When it occurs the dispense will stop and a bleeping noise will
sound. To reset momentarily release the button and press again
2no Stem
Elbow
Y Fitting
Cross
Fitting
2no
Adaptors
CO2 Regulator &
Cylinder

Boste BK Series
8
Operation Guide
Operation of these models is very simple. According to the individual model, ambient and cold or ambient, cold and
sparkling water can be freely dispensed.
During normal operation the only LED indicators are those on the
the front panel of the Undercounter Unit
Cold & Ambient Model Cold, Sparkling & Ambient Model
Top: Power on Sparkling Mode on
Middle: Cooling Mode on Cooling Mode on
Bottom: Cooling cycle on Cooling cycle on
To dispense water simply press and hold the appropriate button for the duration of the required dispense:
Cold & Ambient Model Cold, Sparkling & Ambient Model
Top: Ambient Ambient
Middle: N/A Sparkling
Bottom: Cold Cold
No other user operation function or adjustment is required
Please Note:
The integrated leak prevention control will prevent any
continuous dispense of >60 secs and could occur while
carrying out this prolonged dispensing. When it occurs the
dispense will stop and a bleeping noise will sound. To reset
momentarily release the button and press again

Boste BK Series
9
Maintenance Guide
Minimal routine maintenance is required. Every 6 months maximum a sanitisation procedure is
recommended as follows:
1. Turn off incoming mains water, briefly press cold/ambient (not sparkling) dispense button(s) to
release internal water pressure from the machine and remove filte r .
2. Add 100 ml of a proprietary sanitisation fluid to a clean and empty service filter cartridge/dosing device
and connect into machine. Always ensure to use a reputable branded sanitisation fluid for effective action.
Please note: We recommend using a 3% Hydrogen Peroxide concentration base sanitising fluid of r eputabl e
manufacture to the appropriate dilution ratios as supplied with the product or typically 1:30 max. (Str onger
concentrations will require larger dilution ra tes).
Please remember that most sanitisation fluids (including ozone) contain an active caustic/alkaline agent.
Always use re sponsibl y and with care remembering that due to its alkaline nature unnec e s sary
concentrated/prolonged contact with any materials, including metals, can cause damage. Always rinse
all contact surfaces after use with clean wate r .
3. Turn on incoming water, allow service cartridge/doser to fill and then draw off at least 1 litre of water for
the machine to ingest the solution. Leave solution for 10 minutes inside machine for sanitisation to take eff ect.
During this time thor oughl y clean the machine e x ternall y . For this we recommend the use of pr oprietary
disposable sanitisation wipes. Pay particular attention to the dispense faucet and the push button c ontr ols.
Remember to include the drip tray. If a W a s t e Overflow System is fitted, this may benefit from flushing thr ough with
a small amount of dilute sanitisation fluid.
4. After a satisfactory period of time, flush the machine with at least 10 litres of clean water to clear any trace
of the sanitisation fluid. Optionally use test strips to check.
5. Turn off water and remove the service filter/doser and fit a new filter of reputable quality and suited to the
site conditions. We recommend pre-flushing the new filter to reduce any risk of any loose media in the filter
entering the solenoid valves and pos s ibl y causing a malfunction. Retain the service cartridge/doser for re use.
6. Turn on incoming water supply and carefully ensure the thorough sanitising of the outside of the machine is
completed. Reconnect power and reset any service/filter life monitors ac c o r dingl y . Ensure any hot tank inlet is
reconnected and the tank is purged of air before switching heater on again.
ALWAYS ENSURE ANY RESIDUAL AIR HAS BEEN PURGED FROM ALL DISPENSE CHANNELS
AND ALL IS OPERATIONAL BEFORE LEAVING.

Boste BK Series
10
Fault Diagnosis
No Water Dispenses
Pr obl em/
Report
Possible Cause
Suggested Action
No Water Dispenses
From Ambient
Valve
Water Supply turned off
Check all T a ps/v al v e s/ filters on incoming
supply are fitted and are turned on.
No Electricity/Power Suppl y
Check power cord connected and live and
machine is switched on.
“Waterblock” tripped off
Reset “Waterblock” ( and check for cause
of leakage)
Faulty dispense control panel
membrane switch
Check and replace if required
Faulty Solenoid V a l v e
V a l v e clicking but no water-Check if hole in
centre of washer is cl ea r .
Check valve action. Carefully dismantle v a l v e
and clean out /part replace/complete r eplac e
as needed.
V a l v e not clicking-Check voltage output when
operated. If no output replace PCB.
If there is output, replace solenoid coil/whole
valve coil/whole valve as sembl y c ompl e te.
Leak detector has disabled
dispense operation.
Check for internal leakage, ensure probes are
dry and r eset.
From Cold V a l v e
Fir s tl y all as for Ambient
Ta p
Carry out checks and actions as for ambient
tap.
Chiller tank frozen - F aulty
Thermos tat/Incorrect Setting
Thaw out, check and replace thermostat or reset
temperature set point.
Chiller tank F r ozen-faulty air
pump
Thaw out, check operation and replace Air
pump id necessary.

Boste BK Series
11
No Water
Dispenses continued
No Water Dispenses continued
From Ambient
or Cold V a l v e
Button not being pr es sed
enough
Press button firmly
Faulty c o ntr ol s P C B –no
v ol tag e ou tpu t .
Replace PCB –Check for 24 VDC outputs if necessary.
From Sparkling
Valve
Carbonation System switched
off.
Check switch on back of the machine
Fir s tl y as for Ambient and
or Cold Dispense
Carry out the checks and actions as f o r
Ambient Dispense
Low or no CO2 pressure.
Check and replace cylinder as nec e s sary
Pump not oper ating
Check carbonator level Control Sys tem.
Check probes connected/leads attached. Check
power supply to pump.
Carbonator Tank over
pressurised with CO2
Switch Sparkling System off, shut off CO2 supply and
release CO2 from carbonator. Switch Sparkling system on,
then check pump operation.
If normal, open CO2 supply after pump has stopped.
Pump Feed Valve not opening
Check valve function:
If no input DC voltage, check rectifier and level control
module.
If input but no function, check valve coil.
Replace parts as needed.

Boste BK Series
12
Water Dispenses but not correct Temperature
Pr obl em/
Report
Possible Cause
Suggested Action
Water Dispenses But Not Correct T emper atur e
Ambient W ater
too warm
Low usage and / or fed
from water supply pipe in
warm ducting.
Advise user replacing e x ternal causes and
solutions.
Cold water not
Cold
Cooling and or Sparkling
System switched off.
Check switch positions on the back of the machine as
nec e s sary .
Compressor runs and
switching off (cool/warm to
touch) - Thermostat set too
high.
Decrease Cold Thermostat set point.
Faulty Thermos tat.
Replace Thermos tat
Compressor runs but not
Switching off (Hot to touch).
Contact Aftersales Support.
Refrigeration pr obl e m.
Contact Aftersales Support.
Compressor not running at
all.
Check voltage path through the machine.
No electricity power suppl y .
Check power cord connected and live, and
machine is switched on.
Compressor only hums
slightly/ briefl y .
Check and replace r e lays.
Relays l oose.
Check and refit r e lays.
Compressor F aulty.
Contact Aftersales Support.
DC Tank Empty
Check water level and replace level control module in
fill valve as needed.

Boste BK Series
13
Water Leaks
Pr obl em/
Report
Possible Cause
Suggested Action
Water Leaks
Water lying on
top edge of
lower door
panel and / or
bottom of
Cabinet.
Overflowing Waste Container .
Empty Waste Container and check drain pipe is not
blocked.
Water lying in
bottom of
machine
Faulty W a ter S y s te m Level
Sensor.
Check operation and replace batteries if needed.
Leak in supply inlet pipe-
work and / or filte r .
Locate and repair acc o r dingl y .
Leak from machine water
pipe work fittings.
Locate and repair acc o r dingl y .
Check pressure and fit pressure r educing valve if
needed.
DC tank over overfilling
Check level control module and fill valve function.

Boste BK Series
14
Miscellaneous
Pr obl em/
Report
Possible Cause
Suggested Action
Misc ellaneous
Bleeping Noise
Waste Container full/Internal
water leak.(If fitted)
Empty Waste Container. Check and
reset Leak Detector.
No LED function
Lights
No electricity to Machine.
Check power supply and reconnect as
necessary (Also check out other symptoms
as described separa tel y).
Check Fuse in IEC Sock et.
Replace if nec e s sary .
Faulty C o n tr o l PCB
(Machine working
normall y otherwise).
Replace Control PCB.
Machine shak es
on Start-Up
Compressor Starting.
Level Surf a c e .
No action needed. This is quite normal.
Uneven Surf a c e .
Level up machine using adjustable feet.
Missing Fixings.
Replace missing fixings.
Tripping out
El ectricity
suppl y
Machine in high humidity
envir onment.
Discuss possible repositioning with
cust ome r .
Electrical circuitry f aults.
T e s t, identify and address acc o r dingl y .
See Electrical Diagr ams.
(Contact Azure Aftersales for further advice).

Boste BK Series
15
Miscellaneous continued
Pr obl em/
Report
Possible Cause
Suggested Action
Slow but Continuous Water Dispense
From Ambient
or Cold W ater
Valve
Low incoming W ater
pr es sur e.
Consider re-plumbing to alternative suppl y
if pos s ibl e or boosting the inlet supply
pressure.
From Sparkling
Water Valve
Low/no CO2 Pr es sur e.
Check Regulator and/ or replace cylinde r .
Intermittent Water Dispense
From Ambient
or Cold W ater
Valve
Trapped air in pipe w o rk
(especially where water
pressure is low or after
filter change).
Hold button on to purge air out. (This c ould
take se v e r al minutes where pressure is low).
Use filter function if available.
Button Not being pr es sed
enough.
Press button firmly N.B. This could be
caused by a surrounding cold envir onment
making the action s tiff e r .
Faulty C o n tr o l PCB
Replace Control PCB.
From Ambient
or Cold W ater
V a l v e and
hammering
noise
Fluctuating mains water
pressure situation.
Contact Azure r egar ding special
replacement washers av ailabl e .
Continuous Water Dispense
From Ambient/
Cold or
Sparkling
Water Valve.
Button jammed on/faulty.
Replace Control PCB and or/ button Panel as
needed.
Debris blocking hole in
diaphragm washe r .
Dismantle V a l v e and clean out .
Faulty solenoid valve.
Check valve and replace if needed.

Boste BK Series
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Diagrams & Parts Lists

17