Hyco MBS3 Specification sheet

Product Instruction Manual
Microboil
Available in 3-25 Litre models
Automatic Boiling Water Unit
Vers on 3.2 Jan 2015
V16.3/4

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Thank you for purchas ng from our M crobo l range of wall mounted
automat c bo l ng water un ts. Ava lable n s zes rang ng from 3 to 25 L tres,
the Hyco M crobo l s a great way to prov de the hot dr nks that w ll keep
a busy work team happy and product ve. The M crobo l comes w th a wh te
powder coated steel outer cas ng as standard, sta nless steel covers are
ava lable on request. Please read and follow these nstruct ons carefully to
ensure that nstallat on and operat on s s mple and safe.
1. Important safety points
•This unit dispenses near-boiling water. ever leave children or the infirm
unatteneded near this appliance as boiling water can cause severe injury.
•This appliance can be used by children aged 12 and above and persons with
reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or instruction concerning
the use of this appliance in a safe way.
•This product is not suitable for outdoor use or use in damp conditions.
•Parts of this appliance - especially the tap and the vent pipe - can become very
hot in use and can also generate steam. Take adequate precautions to avoid
injury or damage to property.
•The unit must be vented and will malfunction if steam can not easily escape via
the vent pipe. Please follow the installation instructions.
•Any plastic pipework or fittings connected to the vent must be rated to 100 degrees.
•The unit must be installed by a suitably qualified person in accordance with the
latest edition of iee wiring regulations and uk water fitting regulations.
•The supply cord cannot be replaced by the user. If the cord is damaged the
appliance should be returned to the manufacturer or an authorised service
agent for replacement.
•It is recommended that a filter is installed in the pipework to protect against
lime-scale build up, reduce service cost and extend product life. Lime scale damage
is not covered by the warranty.

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2. Installation
Step 1: Remove the Cover
The cover is attached to the back by means of two pins located at the top of the unit
and two screws at the base of the unit. Remove the screws first, then lift cover upwards
over the tap stem (see right).
Step 2: Wall Mounting (positioning)
Befo e commencing any d illing always ensu e the e a e no pipes o
elect ical cables hidden in the intended d illing su face.
Position the unit bearing in mind it will contain scalding water and should not be
accessible to children or the infirm. Units are typically mounted above a draining
board or drip tray in a kitchen or similar setting. The tap height should be convenient
for the operator and such that visual contact is maintained with the liquid level
of any vessel being filled.
When selecting the final mounting position of the boiler it is important to consider the
surface and wall fixings are suitable for the weight of the boiler when full (see the
Technical Specification section for details). In addition a minimum clearance of 40mm
above the boiler is required to facilitate easy removal of the boiler jacket during any
future maintenance.

Step 3: Fixing
The unit should be fixed to the
wall using the three key hole slots
as shown in the picture.
With the aid of a spirit level or similar,
mark and drill the two upper wall plug
positions. Insert the wall plugs and
screws, leaving approx. 4mm of the
screw head protruding. Hang the boiler
via the two upper key hole slots and
then mark the lower wall plug position.
Remove the boiler from the wall and drill
and insert the final wall plug and screw,
again leaving approx. 4mm of the screw
head visible.
Return the boiler to the wall and mount
via all three key hole slots, tighten the
screws to lock the boiler in place.
Step 4: Plumbing onne tions
Recommended fittings (not supplied): 2 x ½” female to 15mm compression.
Connect the cold water supply to the right side connection (when viewed from the
front) as per the diagram. It is recommended a service valve is fitted as close to the
inlet as is convenient to aid future maintenance.
For the vent connection (left side connection) it is important that the vent pipe
installation adheres to the following specification:
•Falls continuously.
•Has a maximum total length of 400mm.
•Is open to the atmosphere (no blockages).
•All Fittings must be rated for continuous operation at a minimum of 100 C.
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Cold Water In
Vent
Upper key slot
Lower
key slot

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It is possible to pipe the vent beyond the 400mm specification but to do so a tundish or
other air gap device must be fitted within the 400mm distance to the unit (see example
below).
Failu e to comply with the equi ements fo venting the boile will invalidate
the wa anty and my cause damage to the boile o damage to p ope ty.
Step 5: Ele tri al Conne tion
Electrical connection should be made via a 13A switched fused spur in accordance
with the latest edition of the IEE Wiring Regulations.
•Ensure a water supply is present prior to turning on the electrics.
•This appliance MUST BE EARTHED.
Make the connections as:
Green/Yellow earth wire to terminal marked or “E”
Brown live wire to the terminal marked “L”
Blue neutral wire to the terminal marked “ ”
>400mm

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Step 6: Commissioning and Operation
•Ensure water supply is on.
•Turn on the power, the Power LED on the front of the boiler will illuminate to
indicate power is present.
•The unit will now commission by first filling the tank to maximum capacity
and then bringing the water to temperature.
•The unit will now switch to normal operation which will prioritise boiling
over filling, so you will only ever receive near boiling water.
•Powering off and then on the unit via the switched fused spur will initiate
commissioning mode again.

4. User operation
The unit can be left on permanently or controlled by any timer capable of switching
13A.
•Always switch the electrical power off if the water supply needs to be disconnected
for more than a few minutes. Failure to do this can damage the solenoid valve.
The tap can be set to self-return or remain open (for filling larger vessels), to adjust
between the two modes rotate the tap handle 180 C.
Once the boiler has reached its target temperature it will not be possible to dispense
water that is below this temperature, even when recovering from heavy usage. If the
water ceases to flow it is likely the useful water has been exhausted and the boiler will
require time to recover all or part of its capacity before dispensing further water.
All boilers are factory set to near boiling (96 - 98 C) but it may be necessary to adjust
this temperature due to factors such as atmospheric pressure. If adjustment is required
this can be achieved by turning the potentiometer (located on the top of the PCB
controller), clockwise to increase and counter clockwise to decrease (see diagram
below). Keep in mind that the nearer the set point is to boiling the greater the volume
of steam the boiler will produce.
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5. Care and servi e poli y
Before attempting any maintenance on this product ensure it is isolated
from the electrical supply and the water contained within has cooled.
•Clean w th a damp cloth only - do not use abras ves.
•The un t s f tted w th a resettable thermal cut-out located on the element,
a reset should only be attempted when the power s off and by a competent
person. If you get repeated cut-outs th s nd cates a problem and you should
consult the manufacturer for adv ce.
•In the event of a dr pp ng tap, dra n all water from the tank and unscrew the tap
handle, ensure the s l cone seal conta ned w th n s free from scale or other debr s
and then reseat.
•Per od cally (at least every 6 months) remove nternal l me-scale bu ld up us ng
a standard domest c kettle de-scal ng compound. Access to the tank s v a the
l d at the top of the un t. You may w sh to remove the un t from the wall to a d
access to the un t for de-scal ng. We recommend that th s s done by a competent
person.
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6. Te hni al spe ifi ation
Model MBS3 MBS6 MBS8 MBS16 MBS25
Powe 2.4 kW 2.4 kW 2.4 kW 2.4 kW 2.4 kW
Initial d aw 20 38 50 100 156
off (Cups)
Recove y ate 150 150 150 150 150
(Cups/h )
Voltage 230V ~ 230V ~ 230V ~ 230V ~ 230V ~
F equency 50 Hz 50 Hz 50 Hz 50 Hz 50 Hz
Min wo king 0.2 bar 0.2 bar 0.2 bar 0.2 bar 0.2 bar
p essu e
Max wo king 10 bar 10 bar 10 bar 10 bar 10 bar
p essu e
P otection IPX1 IPX1 IPX1 IPX1 IPX1
Dimensions 370 x 269 420 x 312 510 x 312 545 x 364 550 x 414
(HxWxD) x 153 mm x 171 mm x 171 mm x 218 mm x 264 mm
Weight (Full) 8.6 KG 14.8 KG 17.2 KG 28.8 KG 37.8 KG
*Based on 167ml cup.
*For stainless steel models add the suffix 'SS' to the product code e.g. MBS3SS.
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W
H
D
D (inc. tap)
Depth excludes
the tap, for depth
including tap
add 90mm.

7. Troubleshooting
Symptom Possible Cause Solution
Unit fills but
takes a long time
to heat up from
first installation,
or does not
heat at all.
Unit boils
constantly,
or
produces excess
steam at vent.
Water is
too cold.
Tap drips.
Constant flow
of tepid or
cold water
from vent
pipe.
Unit does not fill.
This could be normal - it can
take up to 15 minutes to boil
from cold.
Thermal cut out tripped.
Element has failed.
Electronic controller fault.
Temperature setting is
too high.
Temperature setting is
too low.
Seal failure.
Solenoid valve seized in the
open position.This symptom will
persist even with the power off.
Water level sensor does not
recognize when the tank is full,
or the circuit board is faulty. This
fault will only occur with the
power on.
Water supply is off
(solenoid LED will be on).
Power is off (All LEDs will be off).
Level sensor fault.
Circuit board fault.
Solenoid valve faulty.
Allow sufficient time - water should
get progressively warmer.
Reset thermal cut-out by pressing
button located on element.
Verify 230V mains power present at
element and that element resistance
is approximately 20 Ohms. Replace
if faulty.
Replace.
The temperature can be adjusted by
turning the potentiometer on the
circuit board with a small screwdriver.
The temperature can be adjusted by
turning the potentiometer on the
circuit board with a small screwdriver.
Empty tank and allow to cool. Unscrew
plastic rim of tap, remove and reseat /
replace silicone seal.
Replace solenoid valve.
Check for limescale on probe, and
that electrical connection to circuit
board is sound.
Switch on water supply.
Switch on power.
Remove connection from circuit board
to level probe. If the unit now fills,
ensure there is no short circuit
between the level probe and the tank.
Replace circuit board.
Verify Solenoid LED is on, and that
24V DC is supplied to the valve. If so,
replace solenoid.
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