4eco immerSUN User manual

Water heating for your PV system
Installation and user guide
v1.3

2

Contents
1 Overview 4
2 Te hni al Spe ifi ations 5
3 Installation 6
3.1 Mounting 6
3.2 Ele tri al Conne tions 7
3.3 Clamp Installation 8
3.4 Wiring Diagrams 9
3.5 Using the immerSUN with a dual-rate ele tri al supply 13
4 Installer Settings 14
4.1 DIP Swit h Settings 14
4.2 Installation Setup 15
4.3 Installer Menu 16
5 User Operation 18
5.1 Controls and Display 18
5.2 Changing Values 18
5.3 Normal Operation Display 19
5.4 Main Menu 20
5.5 Timed & Manual Hot Water Boost 21
5.6 Error Messages 22
6 Troubleshooting 23
7 Legionella and General Advi e 24
7.1 Legionella 24
7.2 Getting the most from your immerSUN 24
8 Warranty 25
9 Conforman e 26
10 Commissioning Sheet 27
3

1. Overview
Thank you for hoosing immerSUN. This intelligent devi e is a sensible and pra ti al addition to your PV
or Wind mi rogeneration system.
Water is heated via your existing immersion heater, using surplus power that would otherwise have been
exported to the grid.
Please read and follow this guide to ensure many years of trouble-free operation and savings!
Key features
•Heats water from your PV system or Wind Turbine
•Effe tively adjusts power levels to the immersion heater, keeping the exported
power at virtually zero
•The onsumer no longer needs to be at home to use the free ele tri ity,
whatever the weather
•No need to hange the immersion heater
•Suitable for all ele tri al mi rogeneration systems
•Built-in hot water boost timer
•Manual hot water boost fun tion
•Ba k-lit LCD display shows energy saved, output power and operating mode
•Dual immersion heater ontrol option
•Internal multi-fun tion relay in-addition to the modulated power output
•Up to 4 devi es an be daisy- hained for master / slave operation
•MODBUS RS485 interfa e for system expansion and external data logging
•Internal thermal prote tion
•3 year produ t warranty
4

2. Te hni al Spe ifi ations
Electrical Specifications
Description Minimum Nominal Maximum
Supply Voltage (VAC) 198 230 264
Supply Frequen y (Hz) - 50Hz -
Load Current (A) - 13 16
Load Size (W) 250 3000 3200
Relay Conta t Voltage (VAC) - - 250
Relay Conta t Current (A) - - 16
Clamp Current (A) - - 100
Re ommend PV System Size (kW) 2 - 15
Dimensions and weight
Width (mm) 150 Depth (mm) 64
Height (mm) 140 Weight (g) 935
5

3. Installation
3.1 Mounting
Often, the most suitable lo ation for the immerSUN is near to the onsumer unit. Usually all the
onne tions required are available here.
The following should be onsidered when de iding upon the most suitable lo ation:
•Close to the main in oming mains ele tri al supply of the property
•A ess to immersion heater supply able (this is usually at the onsumer unit)
•A ess to suitable supply via 16A MCB or 13A fused outlet
•User a ess to immerSUN ontrols and visibility of LCD s reen
•Adequate ventilation – keeps vents lear and provide airflow around the unit
•Cable a ess point – through the rear or bottom of the unit
Use the 3 s rews and wall plugs provided to mount the immerSUN at the hosen lo ation.
Remove LCD protective cover after mounting the unit
DO NOT BLOCK VENTS! The en losure may get hot, always keep vents lear of obstru tion and allow
suffi ient learan e from walls, eilings and other obje ts. Observe minimum learan es as shown below.
6
50mm
100mm
100mm
0mm

3.2 Ele tri al Conne tions
Electrical connections should be made only by a competent person Do not attempt to install this
unit if you are not a qualified or an experienced electrician Installation may involve alterations to
fixed wiring and opening the consumer unit, there is risk of death by electrocution
Choose the most suitable able entry points (rear or bottom) and make the ele tri al onne tions to the
unit a ording to the appropriate wiring diagram (see se tion 3.4). Use the blanking plugs provided for
unused able entry points.
Alternative loads
In some ases it may be desired to ontrol the power to a load other than an immersion heater. The load
MUST be a simple resistive load, e.g. an ele tri towel radiator, storage heater et .
The load must not ex eed 3.2kW and must not in lude digital or analogue timers, as they may be
damaged by the proportional output ontrol of the immerSUN.
IMPORTANT!
Be sure to fully tighten terminals, he king the ables are se urely lamped by the terminals and the ord
grips. Failure to ensure good onne tion ould result in fire or permanent damage to the unit.
NOTE: The s rew terminals are 'rising lamp' type.
TERMINALS
MAINS
L LIVE FEED 240V supply input, should be from 16A MCB or 13A fused outlet
LH LIVE OUTPUT Live output to immersion heater, maximum load 13A or 3kW
N NEUTRAL (x2) Mains Neutral terminals (All Neutral terminals are internally onne ted)
E EARTH (x2) Mains Earth terminals (All Earth terminals are internally onne ted)
IMPORTANT! Earth MUST be onne ted
RELAY (used for some additional fun tions, see wiring diagrams in se tion 3.4)
NO NORMALLY OPEN Volt-free normally open relay onta t (max. urrent 13A)
C COMMON Volt-free ommon relay onta t (max. urrent 13A)
NC NORMALLY CLOSED Volt-free normally losed relay onta t (max. urrent 13A)
CLAMP
CT CURRENT TRANSFORMER AC urrent transformer lamp terminals
COMMUNICATIONS
A RS485 A RS485 ommuni ation terminal A (D+)
B RS485 B RS485 ommuni ation terminal B (D-)
GD DIGITAL GND Ground onne tion for future use
5V 5V OUTPUT 5-volt output onne tion for future use
7

3.3 Clamp Installation
Corre t positioning of the urrent sensor lamp is vital to the operation and effi ien y of the immerSUN.
In orre t installation may result in in reased ele tri al osts to the user.
The lamp should be lo ated at the main incoming grid supply to the building. This will be the supply
from the main ele tri meter (NOT the PV generation meter). Close the lamp around one of the ables
(Live or Neutral) from the meter, this an be at the meter lo ation or inside the onsumer unit.
IMPORTANT! Ensure the lamp is se urely losed around the able.
Conne t the lamp wire to the CT terminals inside the immerSUN. Don't worry about polarity as the
immerSUN will figure it out during setup.
PV connected via Henley Block
If the PV system is onne ted via a 'Henley Blo k' then the lamp should be installed on the grid side of
the blo k, i.e. between the meter and Henley blo k.
More than one consumer unit
Where there is more than one onsumer unit, the lamp should be installed at the primary in oming
supply (i.e. before it splits).
Three phase supply
One immerSUN will only work on one of the phases, the lamp MUST be installed on the SAME PHASE
that is wired to the immerSUN, the inverter MUST be on the SAME PHASE also.
If the inverter is 3-phase, then the immerSUN will only 'see' the import/export on that phase, therefore not
all of the export power an be utilised.
Extending the clamp cable
The lamp wire an be extended if required, however due to the small signal from the lamp, twisted-pair
able should be used to help eliminate possible interferen e. The maximum able length is 50m. Most
types of twisted-pair able an be used, e.g. Beldon able, Cat.5, telephone able et .
8

3.4 Wiring Diagrams
Single heater wiring
Most installations will be a single immerSUN onne ted to a single heater. This is shown in the diagram
below.
Alternative wiring method
If the immerSUN is lo ated lose to the onsumer unit, it may be simpler to use the alternative wiring
option using 4- ore able or singles. As the Earth and Neutral terminals are ea h ommon, the alternative
option shows that the heater earth and neutral need not be dire tly onne ted the the immerSUN. The
alternative wiring method an also be used for all of the additional wiring options.
Using the multifunction relay
When wiring one of the options involving the relay onta ts, the relay fun tion must be sele ted. This is
done via the Relay Fun tion option in the Installer Menu. See se tion 4.3. The relay an be set to perform
only one of the fun tions.
Linking several immerSUN units (Cascading)
Up to four immerSUN units an be linked together. This allows up to 12kW (3kW for ea h immerSUN) of
surplus power to be utilised on one phase. This is known as Cas ading as the first immerSUN will
onsume the first available 3kW, the se ond unit in the hain will then onsume the next available 3kW
and so on. When using as ade mode, ea h immerSUN must have its own 3kW (maximum) load.
The immerSUNs should be linked in a 'daisy- hain' fashion with twisted-pair signal able using the
COMMS terminals A and B. Cas ade mode needs to be sele ted in the Installer Menu. See se tion 4.3
For simple single heater ontrol, relay onne tions not required, omms onne tions (A&B) are used only when several immerSUN
devi es are to be linked. (Also see Alternative Mains Wiring diagram).
9
240V AC MAINS SUPPLY
From 16A MCB or
13A fused outlet
IMMERSION HEATER
Max. Load 3kW
CLAMP
Install onto incoming mains
Live ca le to uilding
Single Immersion Heater
COMMS LINK
For linking several
ImmerSUN devices
ISOLATOR
Must e dou le-pole
5V GD AB CT CT
COMMS
RELAY MAINS
NOCNC E EN LN LH
CLAMPPWR

As an alternative to using two flex ables, one 4- ore able may be used for the mains wiring.
Two heaters an be ontrolled by using the multi-fun tion relay. The heaters need not be in the same ylinder. Heater no. 1 has
priority.
10
CONSUMER UNIT
With 16A MCB
IMMERSION HEATER
Max. Load 3kW
Alternative Mains Wiring
ISOLATOR
Must e dou le-pole
4-Core
16A
E N
RELAY MAINS
NOCNC E EN LN LH
IMMERSION HEATERS
Max. Load 3kW each
(Other loads can e used)
CLAMP
Install onto incoming mains
Live or Neutral ca le to uilding
Two Heaters
1
2
ISOLATORS
Must e dou le-pole
240V AC MAINS SUPPLY
From 16A MCB or
13A fused outlet
COMMS LINK
For linking several
ImmerSUN devices
5V GD AB CT CT
COMMS
RELAY MAINS
NOCNC E EN LN LH
CLAMPPWR