Guru Home Systems GU-HB-201-R1 User manual
GURU Hub Base Unit V1
Installation Guide
GU - HB - 201 - R1
Thanks for choosing Guru!
The Guru Hub provides residents with a simple way to control
their own energy use and allows housing managers to flexibly
manage debt risk.
The Guru Hub works with a range of utilities, including heating,
cold water and private wire electricity networks. The Hub can
read up to five meters and control up to three actuators (such as
valves and contactors).
The Guru Hub has been designed with extensive input from
building services professionals. We aim to make the installation
process as simple as possible.
For technical support, please call us on 0207 042 9270
or email at info@fontenergy.com
We strive to continuously improve our products. If you have any
feedback on the installation process or ideas of how to improve it,
please let us know!
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Table of contents
Before you begin
Specifications
Connected devices
Testing & approvals
Terminals & cable specification
Installation of GURU Base Unit
Supplies required (not included)
Safety
Choosing a location
Attaching the Base Unit to the wall
Wiring the Base Unit
Wiring connections in Compartment A
Wiring connections in Compartment B
Sample wiring diagrams
Installation of Guru Top Unit
Safety
Connecting the Top Unit to the Base Unit
Fixing the Top Unit in the oset position
Attaching the Top Unit to the Base Unit
Cleaning
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5
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The Guru Hub comprises two sections:
1. The Base Unit – to be mounted to the wall inside the dwelling
and connected to mains input, control devices and data
inputs.
2. The Top Unit – to be connected to the Base Unit.
The Base Unit is designed for installation at second fix. It can
be installed, with covers in place, and safely left until the Top
Unit is installed. The Top Unit can be installed any time after the
Base Unit, but is intended to be installed once other trades have
completed their work and there is less risk of damage to the Top
Unit’s delicate components.
For information on how to operate the GURU Smart Energy Hub,
please read the User Guide.
Please read this entire installation manual before starting
installation. Please note that protection provided by the
equipment may be impaired if used in a manner other than as
specified in this installation guide.
Figure 1. Base unit Figure 2. Top unit
Before you begin
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Dimensions (W x H x D): 150 x 105 x 44 mm (Base Unit only: 150 x
105 x 35 mm)
Display type: 3.5” RGB TFT with touch screen
Power consumption: < 2W average (excluding load on relays)
Power supply: 230VAC 50Hz 5A max current
Real-time clock battery: CR2032 lithium coin cell
Radio: 2.4 GHz mesh network
Operating temperature: 0° to 40°C
Storage temperature: -5° to 50°C
Operating relative humidity: 5% to 90%
Ingress rating: IP43 (with top unit installed or all base unit covers
in place)
Service life: 10 years
Specifications
6
The Guru Hub has the following interfaces for connecting external
devices:
1 x M-Bus master node, which can read up to five M-Bus slave
devices such as heat or electricity meters. For a list of compatible
meters, please check the website: www.gurusys.co.uk. Note
that most M-Bus devices are polarity independent so it does not
matter which wire goes to which M-Bus terminal.
1 x Pulse Input, compatible with the “pulse output” terminals on
many utility meters. Only one pulse device can be connected,
and it must conform to the following specification:
Pulse output type Volt-free switch (“dry contacts”)
Pulse ON Switch closed (<50kΩ) for > 0.5 milliseconds
Pulse OFF Switch open (>2MΩ) for > 10 milliseconds
Pulse rate Up to 10 Hz
Table 1. Pulse device specification
1 x Analogue Input, which measures voltage in the range 0 to 5V.
A 5V reference signal is also available on the Hub’s terminals.
3 x Relay Outputs, which can switch mains or other loads (up to
3A). Each relay is controlled independently by the Hub, based on
account balances or other logic (depending on how the Hub is
configured). All three relays have “normally open” contacts. Relay
1 also has a “normally closed” contact.
Auxiliary mains (live and neutral) terminals are provided within the
Hub for powering small external devices such as valves. These can
be wired through the Hub’s relay terminals if required.
Connected devices
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Mains Compartment
All cables entering this compartment must have an external
diameter between 6 and 8mm for compatibility with the strain
relief system. All cables must be less than 3m in length for EMC
compliance.
• EN 301489-17 v2.2.1
• EN 61326-1:2006
• EN 55022:2010
• EN 55024:2010
• EN 61000-3-2
• EN 61000-3-3
• EN 300 328 V.1.7.1
• EN 60730-1:2011
• IP 43 to BS EN 60529:1992
Testing & approvals
Terminals & Cable
Specifications
L1 L2 N1 N2 R1
L N E
R2 R3
COMPARTMENT A
COMPARTMENT B
PULSE
PULSE
MBUS – Aln
A0V
A5V
MBUS +
Figure 3. Terminals
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Terminal Description Voltage Max current
L1 Auxiliary Live terminals for powering external
devices
230V AC 3A
L2
L Mains power supply input, power this from a
5A fused spur
230V AC 5A
N
E
N1 Auxiliary Neutral terminals for powering
external devices
230V AC 3A
N2
R1NO Relay 1 normally open terminal Up to 230V
AC or up to
24V DC
3A (AC or DC)
R1NC Relay 1 normally closed terminal
R1C Relay 1 common terminal
R2NO Relay 2 normally open terminal
R2C Relay 2 common terminal
R3NO Relay 3 normally open terminal
R3C Relay 3 common terminal
Table 2. Mains Terminals Specification
Signal Compartment
All cables entering this compartment must have an external
diameter between 4 and 6mm for compatibility with the strain
relief system. All cables must be less than 3m in length for EMC
compliance.
Terminal Description Voltage Max current
PULSE Pulse input, for connecting a voltage-free
(“dry contact”) switching device such as a
meter’s pulse output
3.6V DC 12mA
PULSE
MBUS- M-Bus master node for connecting up to five
M-Bus slave devices
36V DC 400 mA
MBUS+
A5V Analogue 5V reference 5V DC 20 mA
Ain Analogue voltage input 0 – 5V DC
A0V Analogue 0V 0V
Table 3. Signal Terminals Specification
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Supplies required (not included)
• Anchors suitable to wall construction where Hub will be
fitted.
• 4 no. M4 screws to suit anchors.
• Cable clips or ties (to manage cabling to other devices).
Safety
• Mains wiring should only be carried out by a qualified
electrician.
• Ensure suitable protective devices are fitted on the mains
supply to the Hub.
• Ensure mains supply is switched o before installation begins.
• Ensure all cabling and connected devices meet the
specifications stated in this installation guide.
• Use the cable strain relief provided inside the Guru Hub.
• Securely fix all cables between the Hub and connected
devices.
• Include drip loops in all cables where there is risk of water
running along the cables to the Hub.
• If using the Hub’s relays to control inductive loads, fit
appropriate back-EMF suppression devices as close as
possible to the loads. Typically these suppression devices
will be flyback diodes for DC loads and Metal Oxide Varistors
(MOVs) or similar for AC loads.
• Follow earthing guidance for any connected devices, and
ensure that any pipework is adequately earth-bonded.
Installation of GURU
base unit
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The Base Unit should be installed in a location that:
• Allows connection to all M-Bus meters (if applicable) with less
than 3m of cable.
• Allows connection to the pulse device (if applicable) with less
than 3m of cable.
• Allows connection to the analogue device (if applicable) with
less than 3m of cable.
• Allows connection to a dedicated 5A fused spur. Note: if
the Hub will be able to disconnect the domestic electricity
supply, it must be powered from a separate source (such
as the landlord’s supply) that will not be aected if the
domestic supply is cut.
• Is easily accessible to the resident and allows them to view
the Hub’s display from directly in front. Keep in mind that
residents will use the display on the Hub to monitor their
consumption and remaining credit.
• Is easily accessible to the installer of the Top Unit with
clearances as illustrated in Figure 4 below.
• Will not subject the Hub to conditions outside those in the
specification above.
Mounting
hole
Mounting
hole
75mm
minimum
As required to allow safe
entry of fixed cables
Mounting
hole
150mm
minimum
Choosing a location
Figure 4. Required clearances
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1. Ensure power is disconnected to all cables and devices
before installing the Base Unit.
2. If bringing cables into the Base Unit through the rear, thread
cables through the appropriate knock-out holes before
attaching the unit to the wall.
3. Use the drilling template printed on the packaging to mark
the holes on the wall where you intend to mount the Base
Unit.
4. Use suitable anchors for the wall type (not included) at the
four mounting locations indicated on the hole template.
5. Fasten the Base Unit to the wall using the appropriate screws
(not included). Screws must be fitted to all 4 mounting points.
Attaching the Base Unit
to the wall
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The Base Unit has two separate compartments for wiring.
1. The Mains Compartment (A) is for incoming mains wiring and
connections from the relays to control devices such as valves
(Figure 5). This compartment should only be accessed by
qualified electricians. Do not open this compartment unless
the mains power is isolated.
2. The Signal Compartment (B) is for low voltage data
connections. This compartment should only be accessed
by competent technicians, though these needn’t be fully
qualified electricians.
Wiring the Base Unit
L1 L2 N1 N2 R1
L N E
R2 R3
COMPARTMENT A
COMPARTMENT B
PULSE
PULSE
MBUS – Aln
A0V
A5V
MBUS +
Figure 5. Compartments
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Mains power must be via a 230V AC fused spur with 5A
protection fitted.
1. Ensure power is disconnected from all cables and devices.
2. Remove the cover from Compartment A, saving the screws
for later reattachment (Figure 6.1).
3. Connect the mains power supply cable to the L, N and E
terminals in Compartment A.
4. Using guidance from your supplier, connect up to 3 control
devices to the relay and auxiliary power terminals in
Compartment A.
If you need to install link wires to provide mains power to
the relays, ensure that you use mains-rated wire of sucient
current-carrying capacity and with an appropriate insulation
colour.
5. Reattach the cover on Compartment A.
6. Switch on the power supply to the Hub. When mains power
is correctly connected, the red “Mains Present” LED will
light in Compartment B (Figure 6.2).If this LED is not lit,
please check that you have followed the above instructions
correctly. If the LED is still not lit, please stop the installation
process here and contact your supplier.
Wiring connections in
Compartment A
Secure cover with two
screws (provided after
connections complete)
Red light indicates
mains present
Figure 6.1 Compartment A cover Figure 6.2 Compartment B red LED indicator
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Wiring connections in
Compartment B
1. Switch o the power supply to the Hub. Check that the
“Mains Present” LED is not lit. Ensure power is disconnected
to all other cables and devices.
2. Remove the cover from Compartment B, saving the screws
for later reattachment.
3. Using the wiring diagrams on Page 13, connect data input
cables to the terminals in Compartment B.
4. Reattach the cover on Compartment B.
Wiring diagrams
Please contact your supplier for guidance on wiring your
particular installation.zzzzzzzz
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Safety
Mains wiring should only be carried out by a qualified electrician.
However, no mains wiring should be required in order to install
the Guru Top Unit, provided the Base Unit has been installed
correctly.
If you discover at any point during installation that a change
to mains wiring is required, then (unless you are a qualified
electrician) ensure the covers are fixed over Compartments A
and B and stop the installation process until the wiring can be
corrected.
Connecting the Top Unit to the Base Unit
In order to commission the Hub, mains power must be present. If
you intend to commission the Hub, check that the “Mains Present”
LCD in Compartment B is lit.
Remove the cover from Compartment B. This cover is no longer
required and should be returned to your supplier to be used
again.
Connect the supplied ribbon cable to Connector 1 on the Top Unit
(Figure 7.1) and Connector 2 in Compartment B of the Base Unit
(Figure 7.2) as shown below.
Installation of Guru Top Unit
Figure 7.1 Connect ribbon to Base Unit Figure 7.2. Connect ribbon to Top Unit
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Fixing the Top Unit in
the oset position
If you wish to commission the Hub, attach the Top Unit to the
Base Unit in the oset position. This allows you to access the
connectors in Compartment B while the Hub operates as normal.
To fix the Top Unit in the oset position, slide the plastic tabs into
the slots (Figures 8.1 & 8.2).
Please note that Hub commissioning requires special hardware
and software as well as training from Guru Home Systems. Please
contact us if you wish to commission units but don’t have the
training and equipment needed.
Figure 8.1 Putting Top Unit into oset position Figure 8.2 Top Unit in oset position
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Attaching the Top Unit to the
Base Unit
The cover of Compartment B is no longer required and can be
returned to your supplier.
To fix the Top Unit into the closed position, slide the plastic tab
into the slot in the top of the case (Figure 9.1).
Press the Top Unit into the case until the tabs click into place at
the sides (Figure 9.2).
Figure 9.1. Closing the unit. Push the tab into the
slot at the top of the case.
Figure 9.2. Closing the unit. Push side tabs until
a click is heard.
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Cleaning
Use a damp cloth with only water to clean the outside of the Hub.
Solvents or other cleaning products should not be used.
© 2013 Guru Home Systems Ltd
10 Stoney St, London, SE1 9AD, UK
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