Borg & Overstrom b2 User manual

Contents
Install & Operation Manual
GB
Dispense options Chilled & Ambient
Chilled & Hot
Telephone
[phone]
Email
[e-mail]
borgandoverstrom.com
Synergy House
Fakenham Road
Morton On The Hill
NR9 5SP
Chilled
Ambient
2 Model Overview
2 Introduction
3 Controls
4 Components
4 Major Components Reservoir variant
4 Major Components Direct Chill variant
5 Operation
5 Water Connection & Operation
7 Functions & Controls
8 Maintenance
8 Isolation & Removal
9 Sanitisation Guide
11 Advanced Troubleshooting
15 Exploded Diagrams & Parts List
21 Technical Information
21 Electrical Circuit Diagrams
25 Flow Diagrams
29 Specication

Install & Operation Manual
Borg & Overström GB2
Model Overview
All Models
All models are self-contained machines
with robust steel chassis and attractively
injection moulded plastic front and top
panels. For oorstanding models there
is sufcient space internally for most
lters. For countertop models any lters
would need to be tted externally.
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 market).
Chilled
Water is fed into the insulated cold
tank under mains pressure. We strongly
recommend a Pressure Reducing Valve
is tted to all supplies to regulate the
pressure to 3.5 bar/355 KPat. The
cold tank is chilled via the evaporation
coil of the capillary controlled
refrigeration compression system. The
cold temperature is thermostatically
controlled via the adjustment screw on
the cold thermostat. This is factory set
and is not necessary to adjust in most
cases (see Controls).
Ambient
Water bypasses the cold tank for the
ambient dispense option in the case of
direct chill models, for reservoir models
water is fed down through the bafe
plate located inside the cold tank.
Hot
Hot water is provided by a hot water
tank with an external heating element.
Water is supplied directly into the
tank under gravity fed pressure, and
when full hot water is dispensed
by displacement. The water ow
is controlled by either a solenoid
valve (direct chill models) or by a tap
(reservoir models).
Direct Chill
Borg & Overström Direct Chill utilises
innovative technology to chill water
instantly. We recommend this system
for more demanding environments
because of its optimum dispense
performance and unrivalled hygienic
qualities. Superior to the gravity
fed Reservoir system, Direct Chill
technology chills water on demand
for the ultimate drinking experience.
Introduction
A range of compact water dispensers, available as a Reservoir (gravity fed) system
and a Direct Chill system:
• Reservoir Chilled & Ambient
• Reservoir Chilled & Hot
• Direct Chill Cold & Ambient
• Direct Chill Cold & Hot
The b2 model is available as countertop and oor standing in three colours.
© Copyright Borg & Overström.
This manual is printed by Borg & Overström and shall not be reproduced or copied in anyway.

Install & Operation Manual
Borg & Overström GB3
Chilled
On/Off Switch: at rear of machine, switches
cooling operation on/off.
Cold Thermostat: At rear of machine.
NOTE: on a Direct Chill model this is located
inside.
Cold Tap: Push tap lever down.
Reservoir Models - Cold & Ambient only:
Green LED: Cooling operation is switched on.
Yellow LED: Colour shows compresor is in
operation.
Ambient
Ambient Tap: Push tap lever down.
Hot
On/Off Switch: The hot water heating mode
is controlled by a switch on the back of the
unit, next to the cooling mode switch. This
switch is labelled “Hot”.
Hot Thermostat: regulated by a pre-set, non-
adjustable sensor on the tank.
Hot Tap: Lift red safety tab and push down
lever.
Red LED (on hot water icon): Colours to show
heating mode is enabled.
Reservoir Models - Cold & Hot only:
Green LED: Cooling operation is switched on.
Yellow LED: Hot operation is switched on.
Red LED: Heater element active according to
thermostatic demand.
10A Fuse: On rear of machine, integral with
IEC socket.
Controls
Factory set to:
Cold Thermostat
NB: Turn clockwise to decrease water temperature
+C
-C

Install & Operation Manual
Borg & Overström GB4
Components
Major Components & Water Connection - Reservoir variant
Lid
Dispense Taps
Cold Tank
Hot Tank
Hot Switch
Cold Switch
IEC power socket
Water Inlet
Major Components & Water Connection - Direct Chill variant
Lid
Dispense Buttons
Direct Chill
Cold Tank
Hot Tank
Hot Switch
Cold Switch
IEC power socket
Water Inlet
Float Valve Tank

Install & Operation Manual
Borg & Overström GB5
Operation
cold
hot
heating
Water Connection & Operation
On reservoir models remove the
Carbon bag from the cold tank.
Connect and turn on the water
supply. Then connect the power
supply.
Turn on the cold switch (located
at the rear on the unit) to begin
the chilling process.
Turn on the hot switch (also
located at the rear on the unit) to
activate the heating element.
Flush through 10 litres of water
before use.
Chilled & Ambient:
When the Green LED is on the
cooling circuit is activated.
When the Yellow LED is on the
compressor is operating.
Chilled & Hot:
When the Green LED is on the
cooling circuit is activated.
When the Yellow LED is on
heating circuit is activated.
When the Red LED is on the
heating element is activated.
1
The relevant indicator lights will
be lit.
Dispense from all options (to
conrm water supply).
4
3
cold
hot
heating
cold
chilling
6
510 L
cold
chilling
2

Borg & Overström GB
6
Install & Operation Manual
cold
hot
heating
Allow up to 1 hour for the
water to reach its minimum
temperature.
Water Connection & Operation (Continued)
The temperature of the chilled
water can be set from 4c to
10c. When the chilling LED is
off the set temperature has been
reached. This can take up to
one hour.
7
cold
hot
heating
8
cold
chilling
cold
hot
heating
4c
10 c
1
hour

Install & Operation Manual
Borg & Overström GB7
Functions & Controls
General Safety
15cm
• Leave a space no less than 15cm
between the wall and dispenser.
• Keep the machine away from
sunlight, heat and moisture.
Ambient or
Hot Water Lock
& Hot Water
Button
Chilled Water
Button
Ambient or
Hot Water
Button
Chilled Water
Button
Hot Water
Lock
Hot Models: Lift hot water lock
button prior to dispense
Hot Models: Press hot
water lock button and
then hot water button to
dispense.

Install & Operation Manual
Borg & Overström GB8
Maintenance
Isolation & Removal
12
3
Please make sure the machine is completely
disconnected from electricity before carrying
out any maintenance work.
Turn off the water supply.
To drain cold and ambient units, simply push each tap lever untill no water dispense. For cold and hot
dispensers push the cold dispense until no water dispenses and then remove the drain bung to empty the hot
water tank.
NOTE: All maintenance opertaions must be carried out with the dispenser switched off.
Caution: hot water may spill fom the hot tank during this operation.
HOT TANK
DRAIN
DIRECT CHILL
TANK DRAIN

Install & Operation Manual
Borg & Overström GB9
Sanitisation Guide
NOTE: Before beginning the sanitation process please ensure that water is turned off at the mains and refer to the MSDS
document for further information. Use bioguard hand gel and ensure gloves are worn.
1234
5678
Briey press chilled/ambient
dispense buttons to release
internal water pressure from
the machine.
Remove the existing lter. Add 25 ml of Bioguard
Internal Sanitisation uid to a
clean and empty service lter
cartridge.
Connect to machine.
Turn on incoming water, allow
service cartridge/doser to ll.
Dispense water using the
chilled button until the water
appears pink. Briey press the
ambient button too.
Leave the solution inside
machine for sanitisation
(minimum 5 minutes) while
thoroughly cleaning the
machine externally, pay
particular attention to the
dispense faucet and buttons.
Remember to include the drip
tray. If a Waste Overow
System is tted, empty this
and ush through with a small
amount of sanitisation uid if
needed.
PINK
For reservoir variants always ensure that the hot water outlet is plugged before beginning this procedure (use gloves). Never push
the hot water button during the sanitisation procedure.
1234
Remove the top panel by
undoing 2x screws at the rear
of the dispenser.
Remove the polystyrene lid.
Gently lift the plastic lid from
the tank, taking care not to
disconnect the plumbing.
Dispense chilled water until
the bafe plate is accessible.
Insert the Hot tank sanitisation
plug into the centre of the hot
tank, press down rmly. Ret
the plastic lid to the tank.
Follow steps 1-12below.
Once the sanitisation procedure is complete repeat step 3 and reverse step 4 above, then remove the Hot tank sanitisation plug
and replace the plastic lid rmly on the tank, then replace the polystyrene lid and top panel. Ensuring the screws are done up
before leaving.

Borg & Overström GB
10
Install & Operation Manual
9 10 11 12
When the external cleaning
(minimum 5 minutes) is
completed, ush the machine
using the chilled button with
clean water until the dispense
water runs clear. Repeat
briey with the ambient
button.
Turn off water and remove the
service lter. Retain service
lter for reuse.
Fit new lter. Turn on incoming
water supply.
Pre-ush the new lter to waste
using the ambient button until
the water appears clear and
is free of air. Flush through
a small amount of water to
check all functions.
Please note that this sanitisation uid contains
an active caustic/alkaline agent.
Always use responsibly and with care
remembering that due to its alkaline nature
unnecessary concentrated/prolonged contact
with any materials, including metals, can
cause damage. Always rinse all contact
surfaces after use with clean water.
Avoid skin contact and
wear protective gloves
when handling sanitisation
uids
In the event of any skin
contact, ush immediate-
ly with clean, cold water

Install & Operation Manual
Borg & Overström GB11
Advanced Troubleshooting
Fault Diagnosis: No Water Dispenses
Problem/Report Possible Cause Suggested Action
From Ambient Tap Water Supply turned off (and tank
empty).
Check all that taps/valves/ lters
on the incoming supply are tted
and are turned on.
“Waterblock” tripped off (and tank
empty).
Reset “Waterblock” (and check for
any leaks).
“Leak detector” (if tted) tripped off
(and tank empty).
Disconnect the power and water
supply, reset the machine (check
for leaks).
Tap not working (and tank full). Dismantle and check the tap,
completely replacing the tap or just
the washer as necessary.
Reservoir Float Valve jammed (and
tank empty).
Replace/adjust position/repair as
needed.
Blocked tank outlets/pipes. Check and unblock or replace as
needed.
From Cold Tap Firstly all as for Ambient Tap. Carry out checks and actions as for
ambient tap.
Chiller tank frozen – Thermostat set
too low.
Thaw out the machine and increase
cold water temprature.
Chiller tank Frozen - Thermostat not
working.
Thaw out the machine and check
thermostat. Replace Cold Water
thermostat as needed.
From Hot Tap Firstly all as for Ambient Tap. Carry out checks and actions as for
ambient tap
Airlock in dispense pipe work. Unblock/replace hot water pipe
and hot vent pipe. (Check water
level showing in hot vent pipe).
Tank lled with limescale. Replace tank.

Install & Operation Manual
Borg & Overström GB12
Fault Diagnosis: Water Dispenses
but not Correct Temperature
Problem/Report Possible Cause Suggested Action
Ambient Water too Warm Low usage and/or heat from
compressor inuencing stored
water.
Check tank insulation and/or
advise customer.
High usage and/or water supply
pipe in warm ducting.
Advise customer.
Cold Water not Cold Cooling switched off. Check switch positions as
necessary.
Compressor runs and switching off
(cool/warm to touch) - Thermostat
set too high.
Decrease cold thermostat set point.
Thermostat not working. Check/replace thermostat.
Compressor runs but not switching
off (hot to touch).
Please contact technical support.
Refrigeration problem. Please contact technical support.
Compressor not running at all. Please contact technical support.
No electricity power supply. Check the Power cord is connected
and live, and the machine is
switched on.
Compressor only hums slightly/
briey.
Check and replace relays.
Relays loose. Check and ret relays.
Compressor not working. Please contact technical support.
Cold tank Bafe Plate not
connected.
Ret Bafe Plate.
Hot Water not Hot Hot water mode switched off. Switch on hot water mode (status
LED should show).
Heating operation tripped off. Reset overheat button on hot tank.
Break in supply wiring to control
circuit.
Locate break and repair.
Hot water demand too high. Advise user/s.
Main reheat element not working
(Red LED on all the time).
Check supply voltage and current
to hot thermostat and replace
accordingly.
Hot tank heavily scaled (signs of
scale in top of tank, loud boiling
noises etc).
Carry out thorough descale or
replace hot tank.
Break in supply wiring to main
element.
Locate break and repair.

Install & Operation Manual
Borg & Overström GB13
Fault Diagnosis: Water Leaks
Problem/Report Possible Cause Suggested Action
Water lying on top edge of lower
door panel and/or bottom of the
machine.
Overowing Drip Tray waste
container.
Empty Waste Container and check
drainpipe is not blocked.
Water lying in bottom of machine. Leak in supply inlet pipe work and/
or lter.
Locate and repair accordingly.
Leak from machine water pipes
and/or ttings.
Locate and repair accordingly.
Check pressure and t pressure
reducing valve if needed.
Overowing cold tank. Reservoir Variant: oat valve not
connected or malfunctioning -
replace if necessary.
Direct Chill Variant: oat valve or
internal cold tank water ttings
not connected or malfunctioning -
replace if necessary.
Water pressure too high. Check pressure and t pressure
reducing valve if needed.
Jammed oat valve. Check and repair oat valve.
Split Float Valve washer. Replace washer.
Overowing cold tank (Hot Tank
exclusively sealed).
Replace hot tank.
Hot Tank thermistor probe not
working.
Check and replace probe
(Conversion Kit recommended).
Control Board not working. Check and replace main
control board (Conversion Kit
recommended).
Condensation from tank or cold
water pipe.
Check insulation and repair/
replace accordingly.

Install & Operation Manual
Borg & Overström GB14
Fault Diagnosis: Miscellaneous
Problem/Report Possible Cause Suggested Action
No LED Control Lights No electricity to Machine. Check power supply and reconnect
as necessary (Also check out other
symptoms as described separately).
Control PCB not working (Machine
working normally otherwise).
Check/replace PCB.
Machine Shakes on Start-up Compressor Starting. No action needed. This is quite
normal.
Level Surface.
Uneven Surface. Level up machine using adjustable
feet.
Missing Fixings. Replace missing xings.
Tripping out Electricity Supply Machine in high humidity
environment.
Discuss possible repositioning with
customer.
Electrical circuitry faults. Test, identify and address
accordingly. See Electrical
Diagrams.
Please contact technical support

Install & Operation Manual
Borg & Overström GB15
Exploded Diagrams & Parts List
Chilled & Ambient - Reservoir variant
123818
135729
133410
131647
132457
135727
133419
131425
462013
134583
174231
172163
173251
121859
121955
134582
142122
142121
184601
124952
184531
131641
131642- ON COUNTERTOP MODELS
121956
120907
120908
120909
120974
120973
120972
125823
171201
126821
172144
172148
172152
852108
191145
184622
184622

Borg & Overström GB
16
Install & Operation Manual
Chilled & Hot - Reservoir variant
123818
135729
133410
131647
132457
135727
133419
131425
462013
134583
174231
174231
172163
173251
121859
121955
142123
142121
184601
124952
184531
131641
131642- ON COUNTERTOP MODELS
121956
120907
120908
120909
120974
120973
120972
125823
171202
126821
131661
154521
154524
154523
173265
166880
166880
131423
172144
172148
172152
852108
191146
184622
184622

Borg & Overström GB
17
Install & Operation Manual
123818
131647
462013
462013
462013
174231
172163
121859
121955
462013
462013
184601
124952
184531
131641
131642- ON COUNTERTOP MODELS
121956
120907
120908
120909
120974
120973
120972
125823
154523
133416
135721
133415
131422
134601
174310
133418
132456
133414
131644
131643
131424
194121
133512
151544
184415
134581
173249
184625
173251
171204
126822
172144
172148
172152
852108
191147
184622
184622
131642
Chilled & Ambient - Direct Chill variant

Borg & Overström GB
18
Install & Operation Manual
123818
462013 462013
462013
174231
174231
172163
121859
121955
184601
124952
184531
131641
131642- ON COUNTERTOP MODELS
121956
120907
120908
120909
120974
120973
120972
125823
154523
173265
166880
166880 131423
133416
135721
133415
131422 134601
174310
133418
132456
131649
133414
131643
131643
194121
131424
173246
133512
134581
173249 184625
154536
126822
172144
172148
172152
852108
191148
184622
184622
131646
173251
154521
154551
171205
131642
Chilled & Hot - Direct Chill variant

Install & Operation Manual
Borg & Overström GB19
Parts List
Borg & Overstrom
Part No Description
120907 b2 NG Front Panel - Silver
120908 b2 NG Front Panel - White
120909 b2 NG Front Panel - Black
120972 b2 NG Door Panel - Silver
120973 b2 NG Door Panel - White
120974 b2 NG Door Panel - Black
121859 Side Handle
121955 b2/b3 Floorstanding Left Side Panel
121956 b2/b3 Floorstanding Right Side Panel
123818 b2 NG Top Cover Panel Black
124952 b3 Floorstanding Base Panel
125823 b2 NG Drip Tray Set - Black
126821 b2 NG Tap Cover Panel - Black
126822 b2 NG DC Tap Cover Panel - Black
131422 1/4" Inlet Connector Back Nut
131423 b2 Countertop Drain Bung
131424 DC Tank Pipe Connector
131425 Insert for Cold Tank
131641 1/4” PF Inlet Straight Bulkhead Connector
131642 1/4” PF Inlet Elbow Bulkhead Connector
131643 1/4" PF Stem Elbow
131644 1/4" Push-Fit 4 way Joint
131646 Air Vent Elbow for Clip-on Tank Lid
131647 1/4" Push Fit Elbow
131649 1/4" Push Fit Tee
131661 1/4" Equal Elbow Stem only
132456 Reservoir Float Valve (Side Type) - Assembly
132457 Reservoir Float Valve (Lid type) - Assembly
133410 Clip on Tank lid Assembly
133414 b2 Direct Chill Header Tank
133415 DC Cold Tank Inner Lid
133416 DC Cold Tank Lid
133418 b2 Direct Chill Header Tank Lid
133419 Reservoir Bafe Plate
133512 b2 DC Faucet (Light Grey w/o vent)
134582 Ambient Water Pipe
134583 Cold Water Pipe
134601 DC Coil for Twin Tank Models
135721 DC Cold Tank Lid insulation
135727 b2/b3 Floorstanding Reservoir Insulation Sleeve
135729 b2/b3 Floorstanding Reservoir Insulation Top
142121 b2 NG Cold Tap
142122 b2 NG Ambient Tap
142123 b2 NG Hot Tap

Borg & Overström GB
20
Install & Operation Manual
Parts List - Continued
Borg & Overstrom
Part No Description
151544 b2/b3 Floorstanding Drain Bung
154521 Hot Vent Pipe - 300mm
154523 Hot Water Pipe/DC Tank Pipe
154524 Hot Tank Feed Pipe
154536 Hot Tank Silicon Feed Pipe
154551 L-shape Silicon Tube
166880 b2/b3 Hot Tank (New) c/w HB & 90/105 TC Set
171201 b2 CA Circuit Board
171202 b2 CH Circuit Board
171204 b2 CA DC Main Control Board
171205 b2 CH DC Main Control Board
172144 IEC Power Cordset - Danish
172148 IEC Power Cordset - Shucko/EURO
172152 IEC Power Cordset - UK
172163 IEC Fused Socket
173246 LP1/4PFx1/2STS230 Solenoid Valve
173249 HP1/4PFx1/2STS230 Solenoid Valve
173251 b2/b3 Cold Thermostat
173265 90C/105C Hot Tank Sensor Set
174231 Electric Rocker Switch
174310 Direct chill Pump
184415 Grommet for b2 NG DC
184531 b2/b3 Floorstanding Adjustable Foot
184601 b2/b3 Floorstanding Filter Bracket
184622 Magnetic door catch including screw
184625 Solenoid Valve Bracket for b2
191145 b2 NG Reservoir Chilled & Ambient Control Panel Label
191146 b2 NG Reservoir Chilled & Hot Control Panel Label
191147 b2 NG Direct Chill Chilled & Ambient Control Panel Label
191148 b2 NG Direct Chill Chilled & Hot Control Panel Label
194121 Grit Filter
462013 1/4" White Tubing per mtr
852108 IEC Power Cordset - Swiss