intatec 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.
User interface and Maintenance
Hiper II Heat Interface Unit
Instantaneous priority hot water and heang
OK
04/22 E&OE
Annual servicing is required to ensure that the condions of the warranty are met.
This guide details the maintenance regime that should be carried out annually. It is the responsibility of
the network operator to ensure this is met to honour the condions of the warranty.
Relevant Hiper II HIU documents.
1. Installaon and Operang Manual (included with the HIU)
2. User interface and Maintenance. (this document)
3. Commissioning report (included with the HIU)
4. Programming Guide (Only available to the approved and qualied commissioning or service
engineers.
Rev 2

User informaon menu
06/21 E&OE
Page 2
OK (set)
OK
ON /OFF
UP and DOWN arrow
HIU controller screen display
shows the HIU is ready for
Operaon and in standby mode.
.
With Keep Warm funcon OFF.
Re-programming shall only be
allowed by the network operator.
For the user to view only the sengs the HIU
must be in standby mode, and not in heang or
hot water modes.
HOLD THE OK BUTTON DOWN FOR
OVER 3 SECONDS.
First on the screen will be the DHW set
Temperature.
1.
55 0C
2.
The set temperature is ashing, change with the up
and down arrow buons, press OK
Hot Water
Factory set = 55 0C
60
0C
Screen shows the programmed Heang set point.
3.
4.
SET DATE
23/04/2021
Screen shows Date, (ashing) press OK to conrm.
Up or down to reset year/month/day.
Heang type set by
the installer.
Factory set = 60 0C
SET TIME
13 :10
5.
Aer conrming the me, the unit will then
return to standby mode.
Screen shows me, (ashing) press OK to conrm.
Or change by up or down to reset minutes / hours.
Operaon
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.
HIU controller screen display
shows the HIU is ready for
Operaon and in standby mode.
The screen also shows the symbol
for Keep Warm funcon ON.

• 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 temperature
nears 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.
• 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.
User informaon
Opmised funcon
Keep warm mode on
Change sengs mode
Symbols used on the controller screen.
Hot Water
Heang - radiators
Underoor heang
ERROR warning
Prepayment out of credit!
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.
This document is only to be used by the commissioning or service engineer and not to be le
with the HIU or the occupier of the home!
Features and operaonal opons of the Hiper II heat interface unit.
O
CREDIT ON
CREDIT OFF
Prepayment
The HIU can be congured for pre-payment
billing, (somemes called Pay as You Go - PAYG).
All hot water and heang services are pre-paid to the
billing company managing this property.
The tenant or home owner pays for heat as used to
make hot water and heang and measured by the
heat meter in the HIU. Here the screen alternates
Approximately every 8 seconds between the
CREDIT ON display, and the standby screen, Hot water
and heang are available on demand.
Should the tenant or home owner fall out of credit,
then the billing system will at some stage (according
to policy) send a signal to the HIU to shut down.
The screen shows CREDIT OFF.
Heang and hot water will not be available unl the
payment is made to the billing company at which
point a signal will be sent to the HIU, allowing it to
resume hot water and heang on demand.
06/21 E&OE
Screen shows ‘in credit’ and is ‘in standby’.
Screen shows ‘out of credit’ .
Heang and hot water are not available.
Page 3

SECTION 7 - The HIU Controller rst power up and set up
06/21 E&OERev 7
User informaon - Fault codes
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 an
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 do a factory reset (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
feedback 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
Page 4

SECTION 7 - The HIU Controller rst power up and set up
User informaon - Error codes
04/22 E&OE
Page 5
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.
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.
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. Reset (turn power
on and o) to recalibrate the PICV actuator.
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 value 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.
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 temperature is too low?
- 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. Check temperatures.
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.
E8 The PICV actuator cable has
been disconnected from the controller or
there’s a failure on the actuator itself.
No Hot Water available, so to avoid scalding
risk due to very high DHW temperature. The
E8 code appears on the screen. Both Heang
and DHW are no longer available.
To avoid scalding risk , when the HIU detects a
DHW or Heang ow temperature 10°C above
setpoint for more than the programmed me
interval (90 seconds factory set, adjustable up to
210 seconds) the HIU will shut down and show an
E8 error code. The diverter will move into the
Heang posion and Pump will switch o.
Allow the unit to cool down rst! Check PICV
actuator connecon, and that the valve stem pin
is not jammed (free if possible).
Power OFF then ON again, check for movement
in the actuator stem. Replace the actuator if
found to be seized. Replace the valve cartridge if
found to be seized.
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.

Maintenance
06/21 E&OE
Annual servicing is required to ensure that the condions of the warranty are met.
Ref Checklist - Maintenance Remarks /Notes
✓
1Turn o all HIU Isolaon valves.
Isolate the electrical supply to the HIU at the fused spur switch.
Drain the Primary side pipework of the HIU.
If leaving the installaon while maintenance is in progress noces should be placed ac-
cordingly to prevent others from interfering with equipment and valves.
2Inspect STRAINER on the HIU Primary side ow.
REMOVE CAP, REMOVE MESH, CLEAN AND REPLACE.
Sample the Primary water chemical composion and check against specicaon. Report
any abnormalies to the Building manager immediately.
3DRAIN the HIU secondary heang circuit using the built in drain valves.
See page 5 for of strainers (posion 2).
4Check all strainers, including lters ed on the cold water mains supply.
This may also include Pressure Reducing Valves with integral strainer cartridges.
Always isolate any components before maintenance.
5Central Heang side of the HIU - check the safety valve discharges by twisng the cap.
Check the safety valve re-seats and seals.
6Central Heang side of the HIU - check the expansion vessel pressure and adjust or re-
charge to 0.75 bar.
7PLATE HEAT EXCHANGERS - MAINTENANCE
Special aenon should be given to the plate heat exchangers, recent reported loss of
performance may be caused by dirty or blocked plates (lime scale).
Aer cleaning (or replacing) ret both plate heat exchangers. .
8
9
Check all drain valves are closed, open isolaon valves and REFILL (secondary and prima-
ry), check for leaks and vent air from the systems.
Check all the temperature sensors are in their correct posions and securely clamped
onto the pipes.
10 If you are sased that all is correct, replace the casing securely.
11 Power up the HIU, and let the automac diagnoscs run the inial check.
The HIU should then go immediately to the standby mode. If by chance a fault code
appears, the this should be aended to immediately.
Note this in the service record.
Record the Heat network design
ow temperature oCRecord the Heat network
design temperature M3/hr
Page 6

Maintenance
RED = Primary FLOW
ORANGE = Hot Water OUT
WHITE = Heang FLOW
(behind the controller)
GREY = Heang RETURN
12 Network supply test. Run a Kitchen tap, and record the me the network supply reaches
the HIU at the design temperature (noted on page 17)
13 Network supply test. During acon 12, note the ow as can be seen on the heat meter
and record this. Check this is adequate for the design peak ow
expectaons
14 Tapping Test. Open the kitchen tap, and record the me at the tap for the hot water to
reach 50C. This should conform to BS 8558. If not look again at 12 and 13, is the supply
adequate?
15 Heang check. Run the heang, and record the ow and return temperatures.
Record these are correct as per the design requirements.
16 Sign and complete the Service Record (as found in the User Guide
Temperature Sensor Posions
(above the pump)
SERVICE DATE
Engineer name
Company
Phone
Comments
Signed
SERVICE DATE
Engineer name
Company
Phone
Comments
Signed
06/21 E&OE
Page 7
BLUE - = Primary RETURN

SERVICE DATE
Engineer name
Company
Phone
Comments
Signed
SERVICE DATE
Engineer name
Company
Phone
Comments
Signed
SERVICE DATE
Engineer name
Company
Phone
Comments
Signed
SERVICE DATE
Engineer name
Company
Phone
Comments
Signed
SERVICE DATE
Engineer name
Company
Phone
Comments
Signed
Annual Service Record
Enter contact company name and number here for maintenance calls
06/21 E&OE
Page 8