15.5
H E A T I N T E R F A C E U N I T
C O N T E N T S
Page 2
H E A T I N T E R F A C E U N I T
P R O D U C T F E A T U R E S
Page 3
TABLE OF CONTENTS
2.1.
General
2.2
Additional documents
2.3
Symbols used in the
document
2.4
Abbreviations
2.5
Liability and warranty
3.1
General
3.2
Regulations and
equipment
5.1
Label information
5.2
Approvals
5.3
BESA test regime
5.4
Design parameters
5.5
Materials
5.6
Noise data
4.1
General function
4.1.1
Keep warm bypass
4.1.2
Domestic hot water
4.1.3
Central heating
4.1.4
Metering
4.1.5
Safety devices
6.1
Transport
6.2
Packing
6.3
Storage
7.1
Location
7.2
HIU fixing
7.3
Hydraulic connection
7.4
Electrical
connections
7.5
Wiring installation
7.5.1
Wiring diagram (radiator)
7.5.2
Wiring diagram (underfloor
heating)
8.1
Before filling the HIU
8.2
Filling the HIU with water
8.2.1
Filling the secondary MCW and
DHW system
8.2.2
Filling the secondary heating
system
8.2.3
Filling the primary system
8.3
Finalising the HIU installation
8.4
Final commissioning
8.4.1
DHW and keep warm control valve
adjustment
8.4.2
Heating control valve adjustment
8.4.3
Powering up the HIU
8.4.4
Heating set up
8.4.5
DHW set-up
1. PRODUCT FEATURES
The new space saving
v
Therm
˚
Heat Interface Unit (HIU) has been designed to minimise heat losses
and improve the efficiency of your district heating scheme.
The new product range is available in a variety of outputs providing instantaneous Domestic Hot Water
(DHW) and Heating (HTG) for radiators or underfloor heating (UFH) systems in homes.
The HIU provides complete hydraulic separation between the primary circuit and the secondary DHW
and HTG installations.
The HIU is thermostatically controlled to give good and reliable control of temperature which improves
efficiency and lowers return temperature.
Instantaneous hot water is produced via a plate heat exchanger and Pressure Independent Control Valve
(PICV) with actuator, allowing hot water to reach the tap at the desired temperature without delay, even
during low demand periods.
Heating is also produced via a plate heat exchanger and controlled via a PICV with actuator.
The HIU has been designed as a wall mounted product with all connections upwards, however more
options are available.
v
Therm
˚
can be easily accessed for commissioning and maintenance post-installation as the thermal
insulation casing has been designed in 3 sections to facilitate easy access.
v
Therm
˚
has been independently tested in line with the BESA test regime and the results are BESA
verified.
v
Therm
˚
has a number of extras that have
been designed to ease installation and improve
efficiency.
1.
First fix valve rail to protect the HIU by allowing
the installation to be undertaken without the
HIU on site
2.
Fully insulated valve box reduces heat losses
and improves aesthetics
3.
Pipe bracket to allow up and down connections
4.
Bespoke design to meet your requirements
5.
v
Therm
˚
is a compact HIU, see drawing
adjacent (Fig. 1)
6.
Low overall sound power level of 31.8dB (see
section 5.6)
1. PRODUCT FEATURES
Page 3
Page 13-20
Page 21-28
Page 29
Page 30-31
Page 4-5
Page 6-7
Page 8-9
Page 10-11
Page 12
2. INTRODUCTION
3. SAFETY
5. TECHNICAL DATA
4. PRODUCT DESCRIPTION
6. DELIVERY INFORMATION
7. INSTALLATION
8. COMMISSIONING
9. MAINTENANCE
10. TROUBLESHOOTING
Fig. 1
690
434.5
95.5
81
530
