Inta HIPER II User manual

In this document Inta have endeavoured to make all the informaon
and procedures accurate. Inta cannot accept responsibility should it
be found that in any respect the informaon is inaccurate or
incomplete as a result of future developments.
Installaon and Operang Manual
Twin Plate Heat Interface Unit
Instantaneous priority hot water and heang
06/21 E&OERev 8

Index
Page 2
1. Important informaon and introducon
2. Dimensions
3. Components and schemac
4. Accessories
5. Installaon
6. Electrical wiring
7. The HIU rst power up sequence.
8. The HIU features.
9. Controller factory sengs
10. Fault and Error Codes / Fault nding guide
11. Pump
12. Technical Specicaon
13. Spares
14. Warranty
Page 2
Page 3
Pages 4 - 6
Page 6
Pages 7 - 11
Page 12
Page 13
Page 14
Page 15
Page 16 - 21
Page 22
Page 23
Page 24 - 26
Page 27
06/21 E&OE
Page Secon
Annual servicing is required to ensure that the condions of the warranty are met.
Required Hiper HIU documents.
1. Installaon and Operang Manual (this document)
2. Operaon and Maintenance record. (included with the HIU)
3. Commissioning report (included with the HIU)
4. Programming Guide (available on request, contact Inta before commissioning)
These instrucons describe the installaon and operaon and fault nding diagnoscs of the Hiper II Heat Interface Unit (HIU).
For operaon of the enre plant, the technical documentaon of all the components used such as, boiler, tank, pumps,
pipework and valves must be complied with. Inta does not accept any responsibility for the design and performance of the
heat network or components outside of the HIU, demarcaon being the HIU isolaon valves at the connecon to the HIU.
Installaon should only be carried out by a qualied and competent plumbing installer and a qualied and
competent electrical installer in accordance with the current Building, Water and Electrical Regulaons, Legislaon and
Standards. Do not start installaon unl you have thoroughly read and understood all the Installaon and Operang
Instrucons as listed above, and have complied with all safety provisions required.
DANGER – immediate risk of physical injury or even death.
DANGER – immediate risk of serious damage.
IMPORTANT – informaon crical to the installaon or installer.
IMPORTANT – informaon crical to the user.
NOTE – useful informaon regarding the operaon or installaon of the HIU.
SECTION 1 - Important informaon and introducon
Symbols used in these documents
Do not tamper or make any alteraon to the earthing connecons provided as indicated on
the casing with the provision of an earthing label.
One earthing point is on the outside of the lower casing, underneath the HIU. The other is
inside the HIU on the casing backplate. Each earthing connecons is provided with a metric
M4 screw and locking washer.
Earthing label

SECTION 2 - Dimensions and components
Page 3
D
E
A585 mm Height
B465 mm Width
C265 mm Depth
D100 mm Pipe Distance
E140 mm Pipe Distance
Dimensions
Clearances
G
F
H
FSides 30mm
GBelow 300mm
HAbove 200mm
IIn front 50mm
I
Hiper II Heat Interface Units Code
Hiper II Twin Plate HIU SZ 80kW DHW, 3 - 30 HTG HIPER2TP1580
Hiper II Twin Plate HIU 15-80kW DHW, 3 - 30 HTG ZENNER HEAT METER HIPER2TP1580ZE
A
CB
06/21 E&OE

SECTION 3 - Components and schemac
7CH Circulang
Pump
8Automac air
vent
9Safety pressure
relief valve
10 Low pressure
switch
11 Plate heat
exchanger
(PHE)
12 Expansion
Vessel
13 Pressure gauge
14 Shock arrestor
15 Flushing bypass
accessory
16 Flow meter
switch
17 Temperature
sensor
18 Heat meter
posion
110mm pipe
Page 4
Safety valve discharge pipe
Filling Group
CH Return
Cold Supply
CH Flow
DHW Supply
DH Return
DH Flow
Schemac Hiper II HIU
1
1
1
2
18
4
4
4
4
4
4
5
6
7
89
10
11 16
12
13
15
14
17
11
17
17
17
17 2
2
3
1Drain valve /
air venng
2Strainer with
drain valve
3Pocket for heat
meter sensor
4Isolaon Valves
Red - Flow
Blue - Return
5Diverter Valve
6Pressure
independent
control valve
(PICV)
06/21 E&OE

SECTION 3 - Components and schemac
1. Drain / air venng
2. Strainer with drain valves
3. Pocket for heat meter strainer
4. Isolaon Valves
5. Diverter valve actuator
6. Pressure independent control valve & actuator
7. CH Circulang pump
8. Automac air vent
9. Safety pressure relief valve
10. Low pressure switch
11A DHW Plate heat exchanger
11B CH Plate heat exchanger
12. Expansion vessel 8 Ltr
13. Pressure gauge
14. Shock arrester
15. Flushing by pass connecons
16. Flow meter switch
17. Temperature sensor
18. Heat meter posion 110mm pipe
19. Filling group
20. PID Controller
11B
14
16
Rear view of HIU with the HIU back panel made hidden
12
Page 5
3
1
6
15
2
18
2
View from underneath
19
20
3
2
4
7
9
10
13
20
17
4
View from above
5
1
5
8
11A
12
11B
1
06/21 E&OE

SECTION 4 - Accessories
Page 6
Lower connecons pipes (4 qty)
HIAC02BVPACK
ACCESSORIES for HIPER 2 TWIN PLATE HIU Part Code
Flushing By Pass Kit A for internal installaon. (temporary pipe). HI2AKITA
Flushing By Pass Kit B for internal installaon (Fixed connecon to HIU with shut o valve). HI2AKITB
Flushing By Pass Kit C (valve and tee ngs) for external installaon. HI2AKITC
First x JIG.(use as a template for rst x piping, use with HIACPFFKIT) HI2ACJIG
Primary only rst x kit, use with rst x JIG (supplied with the HIU) HIACPFFKIT
Pair stand o wall brackets (to allow for pipes to be run behind the HIU). HIAC01SOBPACK
All Connecons top KIT (4 x insulated pipes + stand o brackets + isolaon valves) HIACWBCONKIT
All connecons from above PIPES (set of 4 insulated preformed pipes to run behind the HIU. HI2ACCON
All connecons from above KIT (2 pairs M x M isolaon valves, x on pipes above the HIU). HI2ACISO
Lower connecons pipe kit (set of 4 preformed pipes to bring connecons 'back to the wall'. HIAC02BVPACK
Pack of 4 Secondary straight isolaon valves. HIAC03BVPACK
Prepayment relay (for billing systems using a 230v signal). HIAC04230KIT
Security - an tamper xing screws + driver. HIAC05SSPACK
Insulaon jacket for HIU isolaon valve. ARM022129
ZE102C5 Zenner Ultrasonic Heat Meter with Mbus. ZE102C5
Pack of 4 Secondary isolaon
valves.HIAC03BVPACK
Pair stand o wall brackets.
HIAC01SOBPACK
Primary only rst x kit.
Order with the HIU but supplied separately
for use with the HIU rst x JIG.
HIACPFFKIT
06/21 E&OE
First Fix Jig HI2ACJIG
Using the Jig allows pipe work to be installed with-
out the HIU and saves the cost of the purchase
of a ‘rst x rail’ for every HIU.
All connecons from above PIPES
HI2ACCON
Flushing By Pass Kit A
HI2AKITA
Flushing By Pass Kit C
HI2AKITC
Flushing By Pass Kit B
HI2AKITB

5.1 Before installaon read and comply with the following
Comply with all safety provisions. Do not tamper with the earthing connecons as indicated
on the casing. To secure the casing when closing the cover, use the provided M4 screw and
washer provided to ensure earth connuity on the casing.
The Installer’s Responsibility -in accordance with Part L of the Building Regulaons, all hot and
cold water pipes should be labelled and insulated to the current standards.
Installaon should only be carried out by a qualied and competent plumbing installer and a qualied and
competent electrical installer in accordance with the current document Building Regulaons, Legislaon
and Standards.
It is the installer’s responsibility to ensure that the place of installaon and wall is suitable.
An unsuitable locaon or provision of adequate supplies (Primary Heang and Cold Water mains) will not
jusfy any warranty or fault claim;
• The wall must be capable of bearing the weight of the HIU lled with water permanently
• Locaons where access is restricted for maintenance, see page 3.
• The HIU is only for WALL MOUNTING in the orientaon shown in this manual.
• Locaons where criminal damage or illegal tampering cannot be reasonably preventable.
• Locaons where discharge pipe is not able to be safely or legally installed and connected
• Supplies which are not suitably clean, and free from contaminants.
• Supplies which contain chemical contaminants.
• Supplies with inadequate ow or pressure (less than 1.5 bar)
• All cold and hot water pipes must be labelled and insulated in line with Part L of the
Building Regulaons.
• On site precauons must be made by the installer to protect the unit from builders dust and debris.
Cold water mains supply should be protected from excessive high pressures.
A Pressure Reducing Valve is recommended and pre-set to 3 bar.
• Wall xing bolts are to be provided by the installer and be suitable to bear the weight of the HIU
permanently when full of water.
• The posion of the HIU should be where the pipe run lengths to DHW outlets are kept to a minimum.
SECTION 5 - Installaon
5.2 Consider which installaon method is to be used.
1. HIU as delivered to site.
2. HIU and stand o brackets as delivered to site
3. HIU JIG at First Fix Pipe work stage, with the HIU to follow later.
4. HIU JIG and stand o brackets, with the HIU to follow later.
Page 7
5.3 General installaon notes
• Ensure all hot and cold water pipes are labelled and insulated in accordance with Part L of the build-
ing regulaons.
• The HIU can only be installed in one orientaon, with the heat network connecons at the top, and
in a vercal posion.
06/21 E&OE
Before removing the cover turn o the power supply at the mains (fused spur 230v 50Hz).

SECTION 5 - Installaon
Page 8
5.4 Ensure the chosen installaon site is inside the building, weather proofed and provides good access for maintenance,
minimum requirements as on page 3. Note where and which pipe connecons will be required, and pay aenon to
where the safety valve discharge pipe will terminate, and ensure this meets all current building regulaons and has a
connuous fall. All pipe runs for domesc hot water services (DHWS) should be at a minimum to prevent water
wastage and maximise DHWS delivery mes.
5.5 Making sure the wall the HIU is to be mounted on complies with 5.1, mark up the posion for the wall bracket. The
posion of the HIU is to be on a true vercal plane as in 5.3. Drill and plug the wall, and secure the HIU with suitable
wall xings (not provided with the HIU).
90o
Hang on to the wall
bracket hooks and with
care posion the HIU
against the wall
5.6 Hang the HIU as shown in this illustraon on to the
inner hooks on the wall bracket.
5.8 Plumbing Connecons LOWER
C 3/4” Heang Flow (radiators or
underoor heang.
D 3/4” DHW HOT OUTLET
E 3/4” DHW COLD INLET
F 3/4” Heang Return
G 1/2” Safety valve discharge
Make connecons with HIAC03BVPACK
Oponal - use HIAC02BVPAC (see page 6)
5.7 Plumbing Connecons UPPER
A Heat Network Flow
B Heat Network Return
Make connecons with
HIACPFFKIT
Isolaon valves
3/4” F Union nut x 3/4” M
and wall bracket
HIAC03BVPACK
C & D use red handles
E & F use blue handles
3/4” F Union nut x 3/4” M
A
B
AB
CDEF
G
06/21 E&OE

5.9 For lling the Heang Circuit for the radiators or UFH, the lling
valves and connecng pipes are integral to the HIU.
This may be removed while pipe work and isolaon valves are made
good. Ret when commissioning.
On compleon of lling the Heang Circuit the temporary connecon
pipe between cold Water supply should be removed. Place safely
inside the unit for future lling operaons.
Wras approval number 1804045
SECTION 5 - Installaon
Page 9
Cold water lter
Electrical connecons cable glands.
Safety valve
discharge
connecon
Accessory opon - stand o brackets (SOB)
5.10 Stand o brackets create a space behind the
HIU that can be used to run pipes in.
The stand o brackets are 40mm o the wall allow-
ing for 13mm pipe insulaon thickness.
First aach the brackets using 4 x xing screws to
the back of the HIU in the matching xing holes pro-
vided.
Fit the wall bracket as in 5.6 and per 5.1
Then hang the HIU as in diagram 5.6, but this me
using the outer wall bracket hooks.
Use outer bracket hooks.
5.11 Safety valve discharge pipe.
The safety valve has a 1/2” F threaded connecon for 15mm pipe to
be connected to (15mm x 1/2” M compression coupling to be provid-
ed by the installer).
The discharge pipe should have a connuous fall and conform to
BS6798.
Where the pipe empes into a drain then that area must be frost free,
and consideraon as to a trap being include as well as a tundish to
maintain any discharge is fully visible. Discharge connecon
06/21 E&OE
Temporary connecon
to remove aer lling.

SECTION 5 - Installaon
Page 10
5.12 Accessory opon - pre-formed pipes
Also available are me saving pipes which are formed to run behind the HIU
and make all the connecons from above.
The isolaon valve kit that can be used for this are 3/4” MxM union nuts, and
seal with bre washers, and can be ed either below or above the HIU.
First aach the brackets using 2 x xing screws to the back of the HIU in the
matching xing holes provided.
Fit the wall bracket as in 5.6 and per 5.1
Fit the stand o brackets as per 5.10
The isolaon can be connected either;
• Below the HIU
• Above the HIU
Hang the HIU as in diagram 5.6, using the outer wall bracket hooks.
All connecons from above
Set of 4 preformed insulated pipes
5.13 Accessory opon - rst x JIG HI2ACJIG
Isolaon valves pack
HIAC03BVPACK
Flushing Bypass Kit C ed at this point in rst x installaon!
Minimum 22mm pipe.
Clip and insulate pipes
06/21 E&OE
oo
JIG is removed leaving pipes, isolaon
valves and wall bracket in place ready for
the HIU installaon at a later date,
Repeat as required, the JIG is an
installaon tool.
1. Fix the wall bracket
2. Hang the JIG.
3. Make the isolaon and pipework connec-
ons.
4. Remove the JIG, and move on to the next
installaon site.
Wall bracket and valves and pipes are in posi-
on ready to receive the HIU at a later date.

5.16 Checklist before lling
Check Connecons!
• Flow and Return in correct posions?
• All union nuts have been ghtened, and a visual inspecon expects them to be water ght.
• All union nuts inside are ghtened, and a visual inspecon expects them to be water ght.
All isolaon valves in the closed posion
• Safety valve discharge pipe to the safety valve.
• Safety valve discharge pipe installaon conforms to Building Regulaons. (pipework to comply with current
Building regulaons and refer to BS6798)
All drain valves and air vent valves are closed.
The HIU installaon on the wall is secure and conforms to the instrucons in 5.1 and 5.4
If a ush bypass kit has been installed, it is in the closed posion
SECTION 5 - Installaon
Page 11
5.14 Flushing Bypass Kits - instrucons for KIT A
• See secon 6, HIU wiring complete. HIU turned o to close the PICV.
• All HIUs on this circuit must be ushed using this method at the same me.
• Close the isolaon valves as shown, and empty of water through the drain valve into a bowl.
• remove test port plugs.
• Install the kit adaptors making water ght seal on the O rings of the adaptors.
• Fix the ushing pipe in posion as shown, ghten the union nuts making a water ght seal with the bre washers provided.
• Open the isolaon valves for system ushing.
• When the ushing operaon is nished, close the isolaon valves as shown below, and empty water through the drain
valve again.
• Now remove and clean the lter mesh by undoing and removing the lter cap.
• Replace the now clean lter mesh, and replace the lter cap. This is part of commissioning secon 8, part 4. Sign complete.
• Remove and store the ushing pipe, replace the test plugs and make water ght. Do not over ghten on the O rings.
• Fill the HIU, ready for commissioning.
5.14 Flushing Bypass Kits - instrucons for KIT B, as above, but the ush pipe and valve can be le in posion.
Adaptors
and bre
washers
Test ports with plugs
Close the Primary Isolaon Valves
Drain
Filter cap
Flush pipe
5.15 Flushing Bypass Kits - instrucons for KIT C.
• Kit is to be assembled and installed at rst x stage, and the tees ed to the primary isolaon valves.
• The ushing procedure is as above, but without the use of the test ports inside the HIU
On compleon of ushing and during operaon the bypass valve on Kit B and C must be shut and kept shut!
06/21 E&OE

SECTION 6 - Electrical connecons
Page 12
7CN1 MODBUS 9600K baud connecon.
9600 baud means that the serial port is capable of
transferring a maximum of 9600 bits per second
(bps).
8ROOM THERMOSTAT—VOLT FREE!
9OPTIONAL SWITCHING
(VOLT FREE—relay required)
FOR 2nd pump to LOAD THE OPTIONAL ADDITION OF HOT
WATER TANK.
10 Connecon for OPTIONAL tank temperature sensor
(Type NTC).
11 Pre-payment connecon to VOLT FREE supply.
12 Power connecon 230V.
6.1 Before electrical connecon read and comply with the following.
Comply with all safety provisions.
Installaon should only be carried out by a competent electrical installer and the installaon
conform to all IEE regulaons
6.2 The installer is to provide a 230vAC 3 amp fused supply as per BS EN 7671:2008. Entry for cables is provided by 3 x cable
glands located beneath the HIU ( at the rear, LHS).
Live, neutral and earth connecons as per the diagram below.
6.3 Room thermostat connecon as per the diagram below. This is a 2 core cable connecon and VOLT FREE.
The room thermostat switching posion is NORMALLY OPEN (though this can be changed to normally closed in the installer
level programming of the controller which is covered in the separate programming manual).
Note that the Room thermostat switching must be VOLT FREE !!
Note that the billing connecon for pre-payment funcon must be VOLT FREE !!
Electrical connecons access panel, remove securing screws to enter
Isolate all electrical supplies before removing the access panel !
06/21 E&OE
FUSE
Note
Internal fuse specicaon
630 mA glass fuse

Page 13
Secon 7 - sequence of rst power up menu.
06/21 E&OE
OK (set)
OK
ON /OFF
UP and DOWN arrow buons
On rst power up, the controller will perform a check
on all connected components. If all is OK, it will
automacally proceed to the set up menu. If a fault or
wiring error is detected, a warning symbol will appear
unl the error is corrected.
START HERE
The correct date and me is
required for recording a
history of diagnosc codes, or
med funcons (see page 15).
5b SET TEMP RADIATOR
60 C
Factory seng for radiators
is 60C.
Press OK or change with the
up and down arrow buons
to increase or decrease the
heang ow temperature.
Pres OK to set.
Next screen will be to set
the hot water temperature
SET DHW.
SET TEMP DHW
55
DHW (domesc hot water)
temperature is factory set
to 55C. Press OK or change
with the up and down arrow
buons to increase or
decrease the temperature.
Drying starts at the minimum temperature.
25°C as factory seng for 3 days then rises to the maximum
factory set temperature (40°C as factory set) for 4 days.
The funcon can be stopped by pressing the OFF buon.
Controller screen looks like
this, now in standby mode.
The icon that can be seen
shows ‘Keep Warm’
funcon is ON.
SETRT=46.5 OK
This is a ‘one o’ start up sequence to ensure the selecon of radiators or UFH .
SET HEATING
RADIATOR
Change to YES using the UP
or DOWN buon to iniate
the oor drying for a new UFH
system.
SELECT FLOOR HEATING or
RADIATOR
UFH is the factory default.
Use the arrow UP/DOWN arrow
buons to change to RADIATORS
7.
ENGLISH, ITALIANO,
FRANCAIS, NEDERLAND
or DEUTSCH.
Factory seng for UFH is 30°C.
Press OK or change with the
UP and DOWN arrow buons
to increase or decrease the
heang ow temperature.
Press OK to set.
SET LANGUAGE
ENGLISH
2. SET DATE
01/01/21
1.
3.
SLAB DRYING
STOP=167h 59m
TFLOOR = 24.5C
SET HEATING
FLOORHEATING
SLAB DRYING
NO
6.
5a.
SET TEMP FLOOR
30 C
4.
SET TIME
09.30
6a.
UP and DOWN buons - use to increase or decrease a
value or number.
OK buon - to conrm and set a value or number.
ON / OFF buon will turn o the HIU.
The unit will not be in standby mode.
Heang, hot water, keep warm and frost protecon funcons
are OFF.
Operaon.

SECTION 8 - The HIU features
Page 14
All features and funcons can be accessed in the installer level programming. How to access, and a list of all the parameters which can be
programmed are in a separate document that is not to be le with the end user as misuse of these set parameters my cause the HIU to not
operate as eciently as commissioned. Refer to the Installer Controller Parameter Sengs Guide, available from Inta or the supplier request.
• Language opons.
• UFH or Radiator Heang.
• UFH oor drying (slab drying)*
• Minimum temperature liming (HTG and DHW)
• Maximum temperature liming (HTG and DHW)
• Opmised heang (uses less heat as the temperature
nears the set point)
• Flow liming in HTG mode, full power as used for
DHW not required for lesser heang loads).
• Temperature control of primary return when in keep
warm mode.
• Frost protecon.
• PWM pump control.
• Manual switching of the pump.
• Opon to temperature control and addional hot water
storage cylinder.
• Opon to switch a second pump to load the cylinder.
• Keep warm funcon switch ON or OFF.
• Opon to redirect the keep warm bypass through the
heang PHE to prevent scaling of the DHW PHE.
• An-Legionella pasteurisaon temperature and med
funcon.
• Prepayment operaon and shung down of the HIU
when out of credit.
• Manual mode for the PICV actuator.
• Manual mode for the diverter valve.
• Room thermostat switching opons for normally open or
normally closed switching.
Features available in the HIU Controller
Check the temperature sensors are clipped securely to the pipes for accu-
rate control. All the sensors are colour coded for ease of idencaon.
RED = Primary FLOW
BLUE = Primary RETURN
ORANGE = Hot Water OUT
WHITE = Heang FLOW
GREY = Heang RETURN
The Controller Programming Guide is only for the use of the installer or commissioning engineer, and under no
circumstances should be le with the user or home owner. Incorrect parameter programming may result in inecient
performance or error code diagnoscs which prevent the HIU operang as required.
06/21 E&OE
*SLAB DRYING (rst me of applying heat to the screed/oor).
Select YES to iniate the oor drying for a new UFH system
Drying starts at the minimum temperature (25°C as factory set) for 3 days then rises to the maximum factory set
temperature (40°C as factory set) for 4 days => 7 days total. These minimum and maximum temperatures can be
reset respecvely with parameter 03 and parameter 12 in the installer menu. The screen shows the me le for
this operaon. The funcon can be stopped by pressing the OFF buon.
Programming the HIU Controller.
Any changes to the factory sengs should be carried out during commissioning. Details of programming parameters are to be
found in the Controller Programming Guide.
Contact Inta to request the Controller Programming Guide.
This document is not to be le with the HIU or the occupier of the home!
This document is available on request from your Inta Specicaon manager involved with this installaon project.
Alternately contact by;
Inta website hps://intatec.co.uk/contact-us/
Phone [phone] ask for HIU Technical Support or HIU Service Desk.

SECTION 9 - Controller factory sengs
Page 15
Descripon /parameter Factory Set
Start temperature oor drying. 25
Factory set temperature for under oor heang (UFH). 30oC
Factory set temperature for radiators heang. 60oC
Select heang type (FLOOR HEATING or RADIATORS) FLOOR HEATING
Set minimum temperature for under oor heang (UFH). 20oC
Set maximum temperature for under oor heang (UFH). 40oC
Set minimum temperature for radiator heang. 40oC
Set maximum temperature for radiator heang 65oC
Opmised heang funcon switch ON (YES) or OFF (NO). NO
Set ∆T heang opmized funcon for UFH (∆T opt. UFH). 5oC
Set ∆T opmized heang funcon for radiator heang 10oC
Set me period for measuring the ∆T in opmized heang
funcon in minutes.
25
Liming the primary ow for Heang (max travel of the
stepper motor in heang mode) value 99 % valve fully
closed.
70
Set max. primary return temperature limit. 60oC
Select pump protecon.
If the pump is not run aer 24 hours, the pump is turned
on, this prevents the pump from seizing during long
periods of no usage).
NO
Set the me for running the pump during the pump
protecon programming funcon in minutes.
2
Set frost protecon.
Temperature is measured from the heang return
temperature sensor.
3oC
Set PWM funcon (00 = OFF). 99 is on max speed
modulaon from external source.
PWM cable provided only as an accessory.
00
Manual operaon of heang pump (overrides room
thermostat).
NO
Select type of contact room stat connecon switching
(N.OPEN = Normally open / N.CLOSE = normally closed)
N.OPEN
Set temp DHW (set the hot water temperature) 55oC
OPTION for system with a hot water storage cylinder
Set DHW temperature produced by cylinder.
60oC
OPTION for a system with a hot water storage cylinder
Set ∆T for loading the cylinder.
5oC
OPTION for a system with a hot water storage cylinder
Select cylinder connected.
(NO = no cylinder/ YES= cylinder).
NO
OPTION for a system with a hot water storage cylinder
O =00
Switching loading pump or electrical heang element = 01
Switching remote fault or error indicator = 02
01
Descripon/parameter Factory Set
Select keep warm funcon ( OFF / ON). YES
Set delay me for acvang the keep warm funcon aer
closing the PICV (last operaon heang or DHW).
Set me in 10 minute values (1 == 10 minutes).
1
Set max primary return temperature during keep warm
funcon.
40oC
Set min primary return temperature during keep warm
funcon.
37oC
Select which Plate Heat Exchanger (PHE) will be used in
combinaon with the keep warm funcon.
00 = PHE for DHW
01 = PHE for Heang
Or convert the controller to Single Plate HIU operaon
02 Single Plate HIU - HTG Only
03 Single plate HIU - DHW ONLY
00
Select Legionella cycle (00 = NO / 01 = YES
Only operates when there is no call for DHW funcon.
NO
Time of the legionella cycle. In minutes. 30
Time for the Legionella to start aer the last demand
for DHW funcon value in days.
7
Set temperature to pasteurise in the legionella cycle. 65oC
Prepayment - select Prepayment NO or YES.
‘Pay as you go’( PAYG).
Connected to a Billing Provider by a VOLT FREE connecon.
NO
PICV ACTUATOR - manual operaon stepper motor PICV
00 = AUTO.
(Seng 01 = FULLY CLOSE Seng 02 = FULLY OPEN).
AUTO
DIVERTING VALVE - manual operaon.
00 = AUTO.
(Seng 01 = DHW Seng 02 = HEATING)
AUTO
PUMP - manual operaon.
00 = AUTO.
(Seng 01 = PUMP ON Seng 02 = PUMP OFF)
AUTO
Language. English
SLAB - start the slab drying funcon. NO
Reset to Factory Sengs.
Note if operang as a single plate HIU - reset parameter 60!
NO
Diagnoscs (display shows operaon, temperature, valve
opening steps).
NO
Programming HIU Controller.
Any changes to the factory sengs should be carried out during
commissioning. Details of programming parameters are to be
found in the Controller Programming Guide.
This document is available on request from your Inta Specicaon
manager involved with this installaon project.
Alternately contact by;
Inta website hps://intatec.co.uk/contact-us/
Phone [phone] ask for HIU Technical Support.
∆T = Temperature dierenal value
06/21 E&OE

SECTION 7 - The HIU Controller rst power up and set up
Page 16
SECTION 10 - Fault and Error Codes / Fault nding guide
06/21 E&OE
Diagnoscs - Fault code denions.
When a fault occurs the relevant code will be displayed on the controller screen.
Fault codes inform that the controller has diagnosed a fault in one of the HIU’s components.
code Cause Eect Remedy
F0 DHW temperature sensor is short circuit or
broken circuit, or disconnected.
The HIU will not operate in DHW demand.
It will sll operate in heang demand mode.
Check that the sensor cable plug connecon is
good, and if OK then check the connecon inside
the controller. If this doesn’t clear the F0 code,
then replace the sensor.
The F0 will clear and return to normal operaon.
F1 Primary ow temperature sensor is short
circuit or broken circuit, or disconnected.
The HIU will not operate in DHW or heang
demand.
Without informaon of the primary temperature
in, the controller can not funcon.
Check that the sensor cable plug connecon is
good, and if OK then check the connecon inside
the controller. If this doesn’t clear the F1 code,
then replace the sensor.
The F1 will clear and return to normal operaon.
F2 DHW storage tank temperature sensor is
short circuit or broken circuit, or
disconnected.
The controller disconnects the control of a n
oponal hot water cylinder and all its parameters.
Check that the sensor cable plug connecon is
good, and if OK then check the connecon inside
the controller. If this doesn’t clear the F2 code,
then replace the sensor.
The F2 will clear and return to normal operaon.
F3 Heang ow temperature sensor is short
circuit or broken circuit, or disconnected.
The HIU will not operate in Heang mode. It will
sll operate in hot water demand mode.
Check that the sensor cable plug connecon is
good, and if OK then check the connecon inside
the controller. If this doesn’t clear the F3 code,
then replace the sensor.
The F3 will clear and return to normal operaon.
F4 Primary return temperature sensor is short
circuit or broken circuit, or disconnected.
The HIU ‘keep warm’ funcon is disabled as this
sensor controls the DHW PHE temperature during
periods of non-use. Also eciency is reduced as
there is no control of the primary return
temperature
DHW and Heang are both sll operaonal.
Check that the sensor cable plug connecon is
good, and if OK then check the connecon inside
the controller. If this doesn’t clear the F4 code,
then replace the sensor.
The F4 will clear and return to normal operaon.
F5 Heang return temperature sensor is short
circuit or broken circuit, or disconnected.
The HIU ‘heang opmisaon’ funcon is disabled
as this sensor controls the heang return
temperature . DHW and Heang are both sll
operaonal.
Check that the sensor cable plug connecon is
good, and if OK then check the connecon inside
the controller. If this doesn’t clear the F5 code,
then replace the sensor.
The F5 will clear and return to normal operaon.
F6 It is a nocaon that unexpected
uctuaons in the return temperature have
been monitored during hot water
producon. Probable cause is the network
supply to the HIU.
The F6 error code is a nocaon that this is
unusual. F6 will reset back to normal operaon
aer 60 seconds.
Check the network supply temperature and ow
and remedy.
If F6 persists, then make a factory reset on the
controller (parameter 00).
This will recalibrate the PICV actuator.
Check DHW sensor is in the correct posion.
Check with a manual operaon of the PICV.
Set this on parameter 91.
If not working, replace the PICV actuator as a last
resort.
F7 Either the pressure in the heang system is
too low or the pressure switch is faulty.
The HIU will not operate in heang mode. It will
sll operate in hot water mode.
Check the system pressure on the gauge on the
HIU. The pressure switch will cut out at 0.15 bar.
Rell system to 1.2 bar.
Resets normal operaon aer 30 seconds.
If low pressure is not the issue, replace the
pressure switch.
F8 The controller is recognising from the feed-
back from the electrical connecon that the
rotaon of the pump is not what it is
expected to be.
Depending on the issue, it’s most likely that heang
will not be available.
Check wiring connecons to the pump. Check
pump for red LED lights signifying a fault.
Check PWM is not set as ON in parameter 24.
Seng must be 00 as factory set.
Only consider replacing the pump head once all
else has been checked
Check water quality which is usually the cause of
a premature pump failure

SECTION 7 - The HIU Controller rst power up and set up
Page 17
SECTION 10 - Fault and Error Codes / Fault nding guide
06/21 E&OE
code Cause Eect Remedy
E1 The measured primary temperature is lower
than the set point temperature is for heang
or hot water, so the HIU will not be able to
achieve the set temperature. This is aer
approximately 60 seconds of ow.
The funcon is re-enabled when the primary
exceeds the setpoint temperature.
Remedy? Check the set point in the controller,
adjust if the set point is set higher than the
design supply temperature.
Check that the primary temperature probe is
correctly connected to the primary pipe.
When the primary temperature and set point are
aligned, the error code E1 automacally
disappears.
E2 In installaons where Radiators are at very
high temperatures, then this is a warning
that the return temperature is higher than
the maximum allowed in parameter 20.
As this is a safety funcon, the PICV closes unl the
sensor on the primary return sees a temperature
drop of 10C below the parameter 20 set point for
maximum.
Reset (turn power on and o) to recalibrate the
PICV actuator.
Check parameter 20 is set correctly, if too low,
reset this at 5C higher than secondary heang
ow set temperature.
Check the temperature probe is posioned
correctly.
E3 The controller is recognising and warning
that the HIU performance is not as the
algorithm predicts. The energy transfer is
poor, and the HIU is not delivering heat as it
should be.
Heat transfer is inecient, hot water producon
reduced and temperature control unstable.
If signs of blockage it could be the strainer is
blocked or the PHE is parally blocked with lime
scale.
Check PICV fully open and check ow on the heat
meter. Low ow now would prove that a
blockage of some sort is the issue.
E4 No hot water. The controller has detected that the hot water
temperature control behaviour is consistent with
the sensor being in the wrong posion, and shut
down hot water producon as a safety precauon.
The HIU will automacally rest aer 10 minutes,
but repeat the shutdown again if the issue is not
resolved.
Check DHW temperature sensor posion is in
correct posion as seen in this manual. If not,
re-posion the sensor into its correct posion.
Then system reset, turn o the power at the
supply, and then turn on again to allow the PICV
actuator to re-calibrate its posion.
E5 Heang is not reaching the set point so is
performing poorly or not at all.
Heang stops aer 20 minutes and shows the E5
code.
Resets aer 30 seconds
Or Error LEDs on the pump?
Power ON and OFF at the mains switch, this
allows the PICV to recalibrate, and in doing this will
allow a small ow into the PHE, which then proves
the PICV and Diverter not at fault.
Check the following possibilies.
- Primary is too low (heat network issue to
resolve)?
- Is the set temperature on the controller higher
than the incoming primary (network)
temperature and temperature is impossible to
reach? Rest set the temperature so it is 10C lower
than the primary.
- PICV blocked / strainer blocked?
- Diverter in the wrong posion?
E6 Temperature informaon from the heang
temperature sensors is wrong or unusual.
Return temperature is too high with no apparent
control being seen.
This error code is showing that either;
1.The heang temperature sensors have been
wrongly posioned with the ow on the return
and the return on the ow, change them to their
correct posion.
2.The installer has not connected the primary
connecons correctly, with the ow connected to
the return connecon. Verify by recording the
primary temperatures.
Advise the installer to recfy the mistake.
E7 The heang return temperature is too high
and the HIU is warning the operator. Various
causes may be considered, example all TRVs
may be closed with only 1 x small radiator
open, but the room thermostat is sll calling
for heat.
Various causes may be considered, example all
TRVs may be closed with only 1 x small radiator
open, but the room thermostat is sll calling for
heat. The return temperature is much too high, so
the HIU ceases .The eect is that the controller
shuts down the pump before re-starng again aer
10 minutes.
The E7 will automacally reset itself aer 10
minutes. Aenon should be paid to the set up of
the heang radiators and controls.
Is the room thermostat posioned correctly to
turn o before all the TRVs shut down?
Is the radiator circuit balanced correctly at the
radiator valves? E7 may occur under certain test
condions where unnatural operang condions
are forced.
Diagnoscs - Error code denions.
When an error code is seen, the controller is warning of unsuitable operang condions that may be causing
the HIU to operate ineciently or possibly not at all. Also could be a potenal operang condions that could,
if le in that state, become a safety issue

SECTION 7 - The HIU Controller rst power up and set up
Page 18
SECTION 10 - Fault and Error Codes / Fault nding Guide
Performance issues where no fault code is displayed
Ref REPORTED ISSUES Trouble Shoong Checklist
1The water from the hot taps is COLD.
• Is there power to the HIU?
• Is the unit going into hot water mode?
• Possible blockages – if there is heat coming into the HIU from the communal
heang system, follow the path through the Strainer, PICV, Diverter ?
• Plate Heat Exchanger blockage, possibly scale. If suspected take the necessary
steps to remove and clean (Fig 8B in the Secon Maintenance).
• No ow or insucient ow through the ow sensor or ow sensor not
working?
Once blockages are cleared, then reconnect the unit, and follow the
commissioning instrucons.
2There is NO WATER at the Hot Taps. • Is there water at the cold taps? If not, check the mains stop tap. If it is found
to be closed, open it and check the fault is resolved. Check piping.
• Are the HIU isolaon valves open or closed?
If not check for blockages on the cold water supply pipe. Check all lters and clean
if blocked.
3Insucient Hot Water at the taps, but no
error codes on the HIU Controller screen.
Is it a ow or temperature problem?
Is the primary ow sucient?
Low primary ow caused poor or no DHW
performance!
If all checks prove the HIU is working correctly,
• Is there a bypass ed on the primary before the HIU, and it has been le
open? CLOSE the valve, the HIU will now work as designed.
• Is the TMV set at the correct temperature? Has it been tampered with or
reset in error? Set to 57C.
• Is there enough FLOW at the HIU? If the supply pumps have not been de-
signed to the required ow of the HIU, then DHWS will not be sucient.
• Similar for pipework, if not sized correctly, the HIU will not be able to deliver
to its designed output.
4• No Room Heang
• Radiators are COLD.
• Under Floor Heang is installed Floor is
COLD.
• No Room Heang or Hot Water.
• Check the ambient temperature. Is the reason that the room thermostat
seng is too low to switch on the heang?
• System low pressure. Has the safety valve discharged? Check system pressure
and top up if necessary.
• Air blockage in the radiators.
• Check the Circulang Pump (see LED lights on the pump which can warn of a
problem or a fault). Is the pump fully operaonal?
• Is the controller set up correctly? See Installer sengs.
• Is the Room thermostat wired correctly? Is it working?
• Check that the communal heang is supplying heat to the unit.
• Check then that the isolaon valves to the unit are open.
• Is the Bypass Valve open on the valve above the HIIU?
5The Control mode seems to be frozen in
either Heang or Hot water modes, and will
not change even regardless of demand or no
demand.
• A PCB in the Controller is damaged. Look for the cause rst before replacing.
Cauon! Has a 230v supply has been connected in error to a zero volt
connecon, either the T1 / T2 connecon for the room stat or on the
connecon posion for pre-payment connecon? This should be checked by
a qualied electrician before aempng any repair!
06/21 E&OE

SECTION 7 - The HIU Controller rst power up and set up
Page 19
SECTION 10 - Fault and Error Codes / Fault nding guide
NO YES
NO
YES
If the ow is reduced at a hot water outlet does
the DHW temperature begin to rise?
Does the tap symbol show
on the display when calling
for hot water?
Check the cable and connecons to
the ow sensor, is it connected?
Has this solved the problem?
YES
Isolate and drain down the HIU.
Then remove and clean the primary strainer.
Replace and ll. Check operaon again.
Has hot water delivery now been restored?
Check for blockage, check PHE for blockage.
YES
Is a warning symbol displayed
on the controller screen?
NO HOT WATER
(but heang is working)
Read the Heat Meter reading for M3/hr ow rate
and check primary ow temperature. Look up the
HIU performance table.
Is the HIU Flow reading below what is required to
produce hot water?
The problem lies in the supply to the HIU.
Not sucient FLOW or TEMPERATURE.
Invesgate and resolve.
NO
NO
Check Bypass is closed.
Problem solved?
Hot Water
at the taps!
See fault code descripon* and
check the correct parameters are set,
recfy. Or if it is a fault, then check the
component is connected or possibly
faulty. Recfy the fault
* Have the ‘Controller Programming Guide at hand!
NO
YES
NO
Check primary
ow rate, is it
sucient?
Blockage
cleared.
YES
06/21 E&OE

SECTION 7 - The HIU Controller rst power up and set up
Page 20
SECTION 10 - Fault and Error Codes / Fault nding guide
Danger - 230v !
NO HEATING Is a warning symbol displayed
on the controller screen?
Heang ON!
Is the primary FLOW rate
and temperature sucient?
YES
NO
YES
Is the room thermostat
is calling for heat. Set room thermostat and turn heang on
Symbol for heang
appears and pump on
Does the heang symbol show on the
display when the room thermostat is
calling for heang?
NO
YES
Check the room thermostat
wiring to the controller is
as per page 12.
If 230 v has been applied to the room
thermostat connecons then the
controller maybe damaged beyond
repair and will have to be replaced.
Warranty will not cover this!
*see Installer Controller Parameter Sengs Guide
YES
Check room thermostat wiring.
N/open or N/closed switching?
See installer parameter 26*.
Check room thermostat by over ride on
parameter 25* (manual heang).
Replace room thermostat if found faulty.
Vent the system of air.
Recfy.
Problem is not the HIU.
NO
Replace pump
Pump - are LED’s
ashing red?
YES
NO fault code displayed See fault code descripon and check if the
programming is correct* If prepayment
used, is it in CREDIT? If a fault code is
showing* recfy the fault according to the
code descripon.
* Have the ‘Controller Programming Guide at hand!
06/21 E&OE