THE REMEHA
4 colour
Artwork
A4 portrait
HIU RANGE
Installation, operation
and maintenance manual
December 2017
CONTENTS
The following instructions are for the E70/5, E70/9, T60/5 & T60/7.
Introduction ............................................................................................................................................................. 3
Declaration of conformity ........................................................................................................................................ 3
Symbol key ............................................................................................................................................................. 3
Installers liability ....................................................................................................................................................... 4
Users liability ........................................................................................................................................................... 4
Performance + HIU data ......................................................................................................................................... 6
HIU hydraulic diagrams ........................................................................................................................................... 9
HIU + Jig drawings & dimensions.......................................................................................................................... 12
Fixing of 1st fix jig + HIU mounting ........................................................................................................................ 19
Wall Fixing (1st Fix Jig) ........................................................................................................................................... 19
Wall Fixing (HIU) .................................................................................................................................................... 19
Wiring Details ........................................................................................................................................................ 22
Commissioning (start up) ....................................................................................................................................... 26
Completion of installation ...................................................................................................................................... 29
Maintenance + servicing of HIU ............................................................................................................................. 30
Fault finding ........................................................................................................................................................... 35
Spare parts ........................................................................................................................................................... 38
Decommissioning .................................................................................................................................................. 40
Warranty................................................................................................................................................................ 40
Commissioning and installation/service documents .............................................................................................. 41
Service records ..................................................................................................................................................... 43
THE REMEHA
HIU RANGE
2
INTRODUCTION
DECLARATION & SYMBOL KEY
The following instructions are offered as a guide to the user and installer.
The installation must be carried out by a competent plumbing and electrical installer in accordance with Building
Regulations, The Building Standards (Scotland) Regulations 1990, The Building Regulations (Northern Ireland), UK
Water Regulations and IEE Electrical Regulations.
Also, BSEN.12828:2003 - Heating Systems in buildings Design for water based systems.
BSEN.12831:2003 Heating Systems in buildings: Method for calculation of the design heat load.
BSEN.13831 Specification for: Expansion vessels using an internal diaphragm, for sealed hot water heating
systems.
BSEN.14336:2004 Heating Systems in buildings: Installation and commissioning of water based heating systems.
The appropriate Building Regulations either The Building Regulations, The Building Regulations (Scotland),
Building Regulations (Northern Ireland).
The Water Fittings Regulations or Water Bye laws in Scotland.
The Current I.E.E. Wiring Regulations.
ElectromagneticCompatibilityDirective2004/108/EEC
LowVoltageDirective2006/95/EC
Ensure that the primary and secondary heating circuit have been flushed in accordance to BS7593 and BSRIA
guide B629/2012.
Declaration of conformity
Our products are manufactured in compliance with the requirements of applicable European Directives. This
appliance complies with the requirements of the CE marking directive.
In the interest of customers we are continuously endeavouring to make improvements in product quality.
All the specifications stated in this document are therefore subject to change without notice.
Symbol Key,
In these instructions various risk levels are employed to draw the user’s attention to particular information. In doing
so we wish to safeguard the user, avoid hazards and guarantee the correct operation of the appliance.
DANGER
Risk of a dangerous situation causing serious physical injury.
WARNING
Risk of a dangerous situation causing slight physical injury.
CAUTION
Risk of material damage.
THE REMEHA
HIU RANGE
3
INSTALLER’S & USERS
LIABILITY
Our liability as the Supplier may not be invoked in the following cases:
• Failure to abide by the instructions on using the appliance.
• Faulty or insufficient maintenance of the appliance.
• Failure to abide by the instructions on installing the appliance.
Installer’s liability
The installer is responsible for the installation and the
commissioning of the appliance. The installer must
respect the following instructions:
• Read and follow the instructions given in the
manuals provided with the appliance.
• Carry out installation in compliance with the
prevailing legislation and standards.
• Perform the initial start up and carry out any
checks necessary.
• Complete the commissioning checklist.
• Explain the installation to the user.
• If maintenance is necessary, warn the user
of the obligation to check the appliance and
maintain it in good working order.
• Leave all the instruction manuals to the user.
DANGER
This unit becomes pressurised when in
operation. The combination of pressurisation
and hot water could lead to serious physical
injury if the safety instructions in this manual
are not adhered to.
The unit is also designed to work at district
heating hydraulic pressures up to 10 bar
g and temperatures up to 90ºC, which, if
exposed to could lead to serious injury.
Users liability
To guarantee optimum operation of the appliance, the
user must respect the following instructions:
Read and follow the instructions given in the manuals
provided with the appliance.
• Call on qualified professionals to carry out
installation and initial start up.
• Ask the installer to explain the installation.
• Have the required checks and services
carried out annually.
Keep the instruction manuals in good
condition and close to the appliance.
WARNING
• Only competent persons having received
the appropriate training are permitted to
work on the appliance and the installation.
• Do not tamper with any of the safety
valves or controls supplied with the unit.
• Before any work, isolate the mains
electrical supply to the appliance.
WARNING
• Do not adjust the (ESBE) three way thermostatic mixing valve. This is factory set to prevent excessive hot water
temperatures reaching the taps in the event of a system failure (see fig. 3 & 4). The purpose of this valve should
not be confused with that of a point of use mixing valve which is fitted near to the tap to prevent scalding.
• Do not tamper with any of the safety valves fitted to the systems. If a fault is suspected contact a competent
installer.
THE REMEHA
HIU RANGE
4
WARNING
• Under no circumstances should the factory fitted
safety valves (three way thermostatic mixing valve
and safety valve, see fig. 1+2) be removed by
anyone other than a competent person. The unit
must not be run if either of these safety valves
have been removed. Doing so will invalidate any
guarantee or claim.
• Although the unit is suitable for cold water
pressures up to 10 bar g it is strongly
recommended that pressures above 3 bar g are
reduced down using a suitable PRV fitted in the
cold feed pipework.
• Where water hammer may be an issue fit a
suitably suized potable water shock arrester /
expansion vessel.
• Where expansion vessels have been fitted, it is
good practice to protect the system in the event
of its failure using a suitable potable water safety
valve.
• No control of safety valve should be tampered
with or used for any other purpose.
• The safety valve discharge pipe should not be
blocked or used for any other purpose.
• Where a tundish is fitted, this should not be
located adjacent to any electrical components.
INSTALLER’S & USERS
LIABILITY CONT.
Please note:
A means for disconnecting the power supply must be incorporated in the fixed wiring in accordance with BS EN
7671:2008.
This unit is designed to be permanently connected to the hydraulic systems and as such flexible hose connections
should not be used.
Details of how the unit should be fixed to its support can be found on page 19.
For maximum and minimum cold water inlet pressures see page 6 & 7.
The unit is fitted with an integral pressure safety valve. Water may drip from the discharge pipe of the Safety valve
and this can be witnessed through a tundish open to atmosphere. Where discharge pipework is piped to a drain,
a trap to prevent foul odours should be installed. The pressure safety valve should be tested regularly to remove
lime deposits and to verify it is not blocked.
Only competent persons having received the appropriate training are permitted to work on the appliance and the
installation. Children must be supervised to ensure they do not play with the appliance.
Prior to installation make sure that the primary & secondary heating circuit have been flushed.
THE REMEHA
HIU RANGE
5
PERFORMANCE AND HIU DATA
The DHW output and performance of the HIU is related to the district flow temperature and flow rate.
THE REMEHA
HIU RANGE
6
PERFORMANCE AND HIU DATA
The DHW output and performance of the HIU is related to the district flow temperature and flow rate.
THE REMEHA
HIU RANGE
7
TECHNICAL CALCULATION GUIDE
Secondary heating pump graph
THE REMEHA
HIU RANGE
8
HYDRAULIC SCHEMATIC
FIG.1
E70/5 & E70/9
The hydraulic schematics within this document are for guidance only and do not constitute system design.
Some components may not be detailed and connection positions have been moved for clarity purposes.
1 A&B. Two Way Electronic Flow Control Valve
2 A. HWS PHE B. HTG PHE
3 A. HWS Strainer B. HTG Strainer
5 Heating Circulation Pump
6 Differential Pressure Controller
7 Primary 5 Way Distributor + Strainer
8 Expansion Vessel
9 Heat Meter (optional)
10 Safety Discharge Outlet Connection
11 Safety Valve
12 Check Valve (Non-Return Valve)
14 Three Way Thermostatic Mixing Valve
15 Pressure Switch
16 Cold Water Meter (optional)
17 Filling Valve
18 Draining Valve
THE REMEHA
HIU RANGE
9
HYDRAULIC SCHEMATIC
FIG.2
T60/5 & T60/7
The hydraulic schematics within this document are for guidance only and do not constitute system design.
Some components may not be detailed and connection positions have been moved for clarity purposes.
B
0
B
1 HWS Thermostatic Control Valve
2 A. HWS PHE B. HTG PHE
3 A. HWS Strainer B. HTG Strainer
5 Heating Circulation Pump
6 Differential Pressure Controller
7 Primary 5 Way Distributor + Strainer
8 Expansion Vessel
9 Heat Meter (optional)
10 Safety Discharge Outlet Connection
11 Safety Valve
12 Check Valve (Non-Return Valve)
13 Two Way Electronic Flow Control Valve
14 Three Way Thermostatic Mixing Valve
15 Pressure Switch
16 Cold Water Meter (optional)
17 Filling Valve
16 Draining Valve
THE REMEHA
HIU RANGE
10
E70/5 & E70/9
FIG.3
COMPONENT PARTS
1A. HWS Two Way Electronic Flow Control Valve 1B. HTG Two Way Electronic Flow Control Valve
2A. HWS PHE
4. PSU (Power Supply Unit)
8. Expansion Vessel
7. 5 Way Distributor + Strainer
14. Three Way Thermostatic Mixing Valve
16. Cold Water Meter (optional)
3A. HWS Strainer
12. Check Valve
17. First Fix JIG (Optional)
9. Heat Meter (optional)
2B. HTG PHE
6. Differential Pressure Controller
5. Heating Circulation Pump
15. Pressure Switch
18. MBUS Box
3B. HTG Strainer
11. Safety Valve
10. Safety Discharge Outlet Connection
COMPONENTS:
1 A&B. Two Way Electronic Flow Control Valve 10 Safety Discharge Outlet Connection
2 A. HWS PHE B. HTG PHE 11 Safety Valve
3 A. HWS Strainer B. HTG Strainer 12 Check Valve (Non-Return Valve)
4 PSU (Power Supply Unit) 14 Three Way Thermostatic Mixing Valve
5 Heating Circulation Pump 15 Pressure Switch
6 Differential Pressure Controller 16 Cold Water Meter (optional)
7 Primary 5 Way Distributor + Strainer 17 First Fix JIG (Optional)
8 Expansion Vessel 18 MBUS Box
9 Heat Meter (optional)
THE REMEHA
HIU RANGE
11
T60/5 & T60/7
FIG.4
COMPONENT PARTS
1A. HWS Thermostatic Mixing Control Valve 13. HTG Two Way Electronic Flow Control Valve
2A. HWS PHE
4. PSU (Power Supply Unit)
8. Expansion Vessel
7. 5 Way Distributor + Strainer
14. Three Way Thermostatic Mixing Valve
16. Cold Water Meter (optional)
3A. HWS Strainer
12. Check Valve
17. First Fix JIG (Optional)
9. Heat Meter (optional)
2B. HTG PHE
6. Differential Pressure Controller
5. Heating Circulation Pump
15. Pressure Switch
18. MBUS Box
3B. HTG Strainer
11. Safety Valve
COMPONENTS:
1 HWS Thermostatic Control Valve 10 Safety Discharge Outlet Connection
2 A. HWS PHE B. HTG PHE 11 Safety Valve
3 A. HWS Strainer B. HTG Strainer 12 Check Valve (Non-Return Valve)
4 PSU (Power Supply Unit) 13 Two Way Electronic Flow Control Valve
5 Heating Circulation Pump 14 Three Way Thermostatic Mixing Valve
6 Differential Pressure Controller 15 Pressure Switch
7 Primary 5 Way Distributor + Strainer 16 Cold Water Meter (optional)
8 Expansion Vessel 17 First Fix JIG (Optional)
9 Heat Meter (optional) 18 MBUS Box
THE REMEHA
HIU RANGE
12
10. Safety Discharge Outlet Connection
FIG.5
5
C
D
4
6
7
8
A
B
570
750
65 60 60 60 100 67,5 67,5 90
182
338
3/4'' 3/4'' 3/4'' 3/4''3/4''3/4''3/4''
DEC
A
B
G
F
3
2
1
5
C
D
4
6
7
8
A
B
A
Central Heating Supply
170320-02
Rev: 0
Central Heating Return
B
E70/5 & E70/9
DIMENSIONS
570
338
750
3/4'' 3/4'' 3/4'' 3/4''3/4''3/4''3/4''
D
E
C
A
G
B
F
182
65 60 60 60 100 67,5 67,5 90
CONNECTIONS:
A Central Heating Supply
B Central Heating Return
C Domestic Cold Water Inlet
D Domestic Cold Water Outlet
E Domestic Hot Water
F Space Heating Supply
G Space Heating Return
THE REMEHA
HIU RANGE
13
T60/5 & T60/7
5
C
D
4
6
7
8
A
B
570
750
65 60 60 60 100 67,5 67,5 90
182
338
3/4'' 3/4'' 3/4'' 3/4''3/4''3/4''3/4''
DEC
A
B
G
F
3
2
1
5
C
D
4
6
7
8
A
B
A
Central Heating Supply
170320-01
Rev: 0
Central Heating Return
B
DIMENSIONS
FIG.6
570
338
750
3/4'' 3/4'' 3/4'' 3/4''3/4''3/4''3/4''
D
E
C
A
G
B
F
182
65 60 60 60 100 67,5 67,5 90
CONNECTIONS:
A Central Heating Supply
B Central Heating Return
C Domestic Cold Water Inlet
D Domestic Cold Water Outlet
E Domestic Hot Water
F Space Heating Supply
G Space Heating Return
THE REMEHA
HIU RANGE
14
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