IDEAL Logic HIU 50 Indirect User manual

PRODUCT GUIDE
WE HAVE IT COVERED.
LOGIC HEAT
INTERFACE UNITS
(HIUs)

02
Ideal Commercial Boilers is the UK’s market leader of
high efficiency commercial heating solutions.
Operating from its Hull manufacturing plant and offices
since 1906, Ideal Commercial Boilers is one of the few
true British manufacturers left in the heating industry.
Your phone or tablet can let you
appreciate our Condensing Boiler range
in a new dimension.
The Ideal Commercial Eye app uses
the latest technology to project 3D
renders from the page of this brochure
on to your device.
To see this for yourself, simply download the
Ideal Commercial Eye app for free from your
device’s app store. Open the app and then
place your device over the image that has
this icon next to it:
DOWNLOAD
THE APP
BRING BOILERS TO LIFE

03
4 HIU Introduction
Logic HIU range
6-9 Logic HIU 50 Indirect
10-13 Logic HIU 75 Indirect
14-17 Logic HIU 50 Direct MT
18-20 Logic HIU 50 Direct HT
Metering & Accessories
21 CF Echo II
21 CF UltramaxX V
21 Accessories
Condensing Boiler range
23 Evomax
24-25 Evomax Cascade
26 Imax Xtra
27 Imax Xtra EL
28 Evomod
29 Evojet
30-31 Commercial range overview
32-33 Stelrad radiators
34-35 Ideal Training & Support

04
TYPICAL
SYSTEM.
DOWNLOAD
THE APP
LOGIC HIU
INTRODUCTION
The Ideal Heat Interface Units are heat energy transfer
units. Designed for use in conjunction with centralised
boilers, district heating or central energy systems. The
function is to efficiently transfer heat from the plant
room to the individual dwelling’s central heating (CH)
and domestic hot water (DHW) systems.
TYPICAL SYSTEM

05
Ideal HIUs incorporate an internal electronic control
unit which ensures not only maximum efficiency,
improved reaction time and control but also
incorporates other additional features.
Modulating valves control the supply of hot water to
both the space heating and domestic hot water within
the apartment.
The thermally insulated casings minimise heat loss
from the unit.
Maximum energy saving from the HIUs can only be
achieved if the system is designed correctly and HIUs
are selected and sized correctly.
To ensure maximum efficiency, reliability and
performance the system must be designed and
commissioned in accordance with CIBSE.
IDEAL LOGIC HIU
BENEFITS
THE BENEFITS OF IDEAL LOGIC HIUs ARE:
• Compact design requiring a minimum amount of space
• Minimal routine maintenance since they do not require
regular servicing or maintenance
• All the Logic HIUs incorporate a spacer piece which can
be easily removed and a heat meter fitted inside the unit.
This allows the energy used by each individual apartment
to be recorded and charged accordingly
THE LOGIC HIU RANGE HAS TWO METER
OPTIONS AVAILABLE:
• CF ECHO II
• CF ULTRAMAXX V
Depending upon the meter chosen the energy used can
be monitored and recorded automatically which enables
automatic billing to the tenants.
For information on how to design Ideal Logic HIUs
into you next project please refer to the Design Guide which
covers:
• Unit selection
• Heating system layout
• Integration of low carbon heat sources
• Prediction of hot water simultaneous demands
SAP has been adopted by the Government as part of
the UK’s national standard for calculating the energy
performance of buildings.
Every new building has to have an SAP rating. It provides a
simple means of reliably estimating the energy efficiency.
SAP ratings are expressed on a scale of 1 to 100, the higher
the number the more energy efficient the building.
SAP RATING

06
* After shut-off valves are installed the connections become a female 3/4’’.
CONNECTION A B C
Thread G¾” G½” G1”*
D E F Depth inc. Cover kg
65mm 550mm 630mm 265mm 19
F
A ABB
DD
E
D
C
C
• Twin plate design hydraulically separates both domestic
and space heating from the central primary supply
• Internal electronic control unit with LCD display
• The standard unit can be set to hold a stable heating
flow temperature, to suit the installation (radiators, UFH
for example), but crucially, can also be set to vary the
heating flow temperature automatically depending on the
temperature of the heating return water
• Automatically compensates for changes due to external
influences, such as outside temperature etc. thereby
ensuring that the unit and the system operate at maximum
efficiency
• Pump bypass protection, in case of complete radiator
TRV shutdown
• Compact and lightweight
• Fully insulated EPP front cover
• Convertible to underfloor heating
• Configurable hot water priority
• Pressure independent control valve
• Ability to pre-heating of the DHW exchanger
FEATURES & BENEFITS
The Logic heat interface unit is the latest
‘intelligent’ range of HIU from Ideal. The Logic
HIU is the complete solution for instantaneous
hot water production and space heating control.
This is an indirect wall mounted HIU, providing
50 kW instantaneous priority DHW and 15 kW
modulated CH. This can be converted to under
floor heating including inbuilt safety thermostat
capability.
LOGIC HIU
50 INDIRECT

07
LOGIC HIU
Maximum working pressure: 16 bar - primary
3 bar - secondary
Maximum temperature 85°C
Max. Percentage of glycol 30%
Max. Recommended primary
circuit flow rate
1.2 m³/h
PRIMARY PERFORMANCE
Heat Interface Unit 50
Primary ball valve set
Domestic connection flow & return valve kit
Filling loop connection kit valves
Flushing By-pass
CF Echo II
CF Ultramaxx V
UIN PRODUCT NAME METERING OPTIONS
211094 Logic HIU Indirect 50 HIU only, meter not
included
211347 Logic HIU Indirect 50 Factory fitted, CF Echo 11
MbBus 1
211351 Logic HIU Indirect 50 Factory fitted, CF
Ultramaxx V MBus PS
Power supply 230 V (ac)±10% 50 Hz
Max. Power consumption 105 W
Protection class IP 40
Actuator Stepper 24 V
Probes NTC 10 kΩ
ELECTRICAL
Frame RAL 9010 sprayed steel
Protective shell cover EPP (Expanded polypropylene)
Components Brass BS EN 12165 CW617N
Pipes Stainless steel
Exchanger Brazed stainless steel
CONSTRUCTION
INCLUDED AS STANDARD
ACCESSORIES
The temperature setting operates on the principle of set
point regulation and can be fixed within application limits.
Heating Set Point 25 to 75°C
Nom. heating exchanger net
output:
15 kW
Secondary circuit: Maximum pressure rating 3 bar
Maximum operating pressure
2.5 bar
Pump UPS 15/60
Pump bypass setting 0.45 bar
Pressure switch Opening 0.4 bar
Closing 0.8 bar
Safety relief valve setting 3 bar
Safety thermostat 55˚C ±3
Expansion vessel 7.5 litre
Under floor heating capability Optional
Heating control circuit VOLT FREE
HEATING
The DHW function takes priority over the heating function
controlled by the DHW priority flow switch.
Set Point DHW temperature 42 to 60°C
Max. Domestic hot water
pressure
10 bar
DHW circuit max. flow rate 18 l/m (0.3 l/s)
Min. flow rate to activate
domestic flow sensor
2.7 l/m ±0.3
Max. Differential pressure on
domestic water modulating
valve
Δp 1.65 bar
Min. Differential pressure on
domestic water modulating
valve
Δp 0.35 bar
Nom. DHW heat exchanger
net output
50 kW - Logic HIU
50 Indirect
DOMESTIC HOT WATER - DHW
INCLUDING OPTIONAL PRE HEAT FUNCTION

08
HYDRAULIC CHARACTERISTICS DOMESTIC HOT WATER - PRIMARY SIDE
HYDRAULIC CHARACTERISTICS HEATING - PRIMARY SIDE
DOMESTIC HOT WATER
DHW - heat exchanger
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.25 m³/h
Hydraulic Characteristics
Heating - secondary side
Flow Path
Heating - secondary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
0
10
20
30
40
50
60
0 0.1 0.2 0.3 0.4 0.5 0.6
Flowrate -l/s
Pressure loss -kPa
3
2
1
Kv = 2.63 m³/h
UPS 15 - 60 pump settings
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
HRHF
DHW - heat exchanger
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.03 m³/h
Flow Path
Heating - primary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
HR
HF
CHS
HEATING
CHS
HRHF
DHW - heat exchanger
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.25 m³/h
Hydraulic Characteristics
Heating - secondary side
Flow Path
Heating - secondary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
0
10
20
30
40
50
60
0 0.1 0.2 0.3 0.4 0.5 0.6
Flowrate -l/s
Pressure loss -kPa
3
2
1
Kv = 2.63 m³/h
UPS 15 - 60 pump settings
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
HRHF
DHW - heat exchanger
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.03 m³/h
Flow Path
Heating - primary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
HR
HF
CHS
CHS
PRIMARY FLOW CHARACTERISTICS

09
HYDRAULIC CHARACTERISTICS HEATING - SECONDARY SIDE
HEATING
DHW - heat exchanger
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.25 m³/h
Hydraulic Characteristics
Heating - secondary side
Flow Path
Heating - secondary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
0
10
20
30
40
50
60
0 0.1 0.2 0.3 0.4 0.5 0.6
Flowrate -l/s
Pressure loss -kPa
3
2
1
Kv = 2.63 m³/h
UPS 15 - 60 pump settings
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
HRHF
DHW - heat exchanger
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.03 m³/h
Flow Path
Heating - primary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
HR
HF
CHS
CHS
HRHF
Primary Flow Rate I/h
Primary flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary
flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow
temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
DOMESTIC HOT WATER OUTPUT

10
ON DHW CH FAULT
RESET
F
A ABB
DD
E
D
C
C
* After shut-off valves are installed the connections become a female 3/4’’.
CONNECTION A B C
Thread G¾” G½” G1”*
D E F Depth inc. Cover kg
65mm 550mm 630mm 265mm 19
• Twin plate design hydraulically separates both domestic
and space heating from the central primary supply
• Internal electronic control unit with LCD display
• The standard unit can be set to hold a stable heating
flow temperature, to suit the installation (radiators, UFH
for example), but crucially, can also be set to vary the
heating flow temperature automatically depending on the
temperature of the heating return water
• Automatically compensate for changes due to external
influences, such as outside temperature etc. thereby
ensuring that the unit and the system operate at maximum
efficiency
• Convertible to underfloor heating
• Configurable hot water priority
• Pressure independent control valve
• Pump bypass protection, in case of complete radiator TRV
shutdown
• Ability to pre-heating of the DHW exchanger
FEATURES & BENEFITS
The Logic heat interface unit is the latest
‘intelligent’ range of Logic HIUs from Ideal.
The Logic HIU is the complete solution for
instantaneous hot water production and space
heating control.
This is an indirect wall mounted HIU, providing
75 kW instantaneous priority DHW and 15 kW
modulated CH. This can be converted to under
floor heating including inbuilt safety thermostat
capability.
LOGIC HIU
75 INDIRECT

11
LOGIC HIU
Maximum working pressure: 16 bar - primary
3 bar - secondary
Maximum temperature 85°C
Max. Percentage of glycol 30%
Max. Recommended primary
circuit flow rate
1.2 m³/h
PRIMARY PERFORMANCE
Heat Interface Unit 75
Primary ball valve set
Domestic connection flow & return valve kit
Filling loop connection kit valves
Flushing By-pass
CF Echo II
CF Ultramaxx V
UIN PRODUCT NAME METERING OPTIONS
211093 Logic HIU Indirect 75 HIU only, meter not
included
211346 Logic HIU Indirect 75 Factory fitted, CF Echo 11
MbBus 1
211350 Logic HIU Indirect 75 Factory fitted, CF
Ultramaxx V MBus PS
Power supply 230 V (ac)±10% 50 Hz
Max. Power consumption 105 W
Protection class IP 40
Actuator Stepper 24 V
Probes NTC 10 kΩ
ELECTRICAL
Frame RAL 9010 sprayed steel
Protective shell cover EPP (Expanded polypropylene)
Components Brass BS EN 12165 CW617N
Pipes Stainless steel
Exchanger Brazed stainless steel
CONSTRUCTION
INCLUDED AS STANDARD
ACCESSORIES
The temperature setting operates on the principle of set
point regulation and can be fixed within application limits.
Heating Set Point 25 to 75°C
Nom. heating exchanger net
output:
15 kW
Secondary circuit: Maximum pressure rating 3 bar
Maximum operating pressure
2.5 bar
Pump UPS 15/60
Pump bypass setting 0.45 bar
Pressure switch Opening 0.4 bar
Closing 0.8 bar
Safety relief valve setting 3 bar
Safety thermostat 55˚C ±3
Expansion vessel 7.5 litre
Under floor heating capability Optional
Heating control circuit VOLT FREE
HEATING
The DHW function takes priority over the heating function
controlled by the DHW priority flow switch.
Set Point DHW temperature 42 to 60°C
Max. Domestic hot water
pressure
10 bar
DHW circuit max. flow rate 26.6l/m (0.44l/s)
Min. flow rate to activate
domestic flow sensor
2.7 l/m ±0.3
Max. Differential pressure on
domestic water modulating
valve
Δp 1.65 bar
Min. Differential pressure on
domestic water modulating
valve
Δp 0.35 bar
Nom. DHW heat exchanger
net output
75 kW - Logic HIU
75 Indirect
DOMESTIC HOT WATER - DHW
INCLUDING OPTIONAL PRE HEAT FUNCTION

12
HYDRAULIC CHARACTERISTICS DOMESTIC HOT WATER - PRIMARY SIDE
HYDRAULIC CHARACTERISTICS HEATING - PRIMARY SIDE
DOMESTIC HOT WATER
DHW - heat exchanger
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.25 m³/h
Hydraulic Characteristics
Heating - secondary side
Flow Path
Heating - secondary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
0
10
20
30
40
50
60
0 0.1 0.2 0.3 0.4 0.5 0.6
Flowrate -l/s
Pressure loss -kPa
3
2
1
Kv = 2.63 m³/h
UPS 15 - 60 pump settings
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
HRHF
DHW - heat exchanger
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.03 m³/h
Flow Path
Heating - primary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
HR
HF
CHS
HEATING
DHW - heat exchanger
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.25 m³/h
Hydraulic Characteristics
Heating - secondary side
Flow Path
Heating - secondary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
0
10
20
30
40
50
60
0 0.1 0.2 0.3 0.4 0.5 0.6
Flowrate -l/s
Pressure loss -kPa
3
2
1
Kv = 2.63 m³/h
UPS 15 - 60 pump settings
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
HRHF
DHW - heat exchanger
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.03 m³/h
Flow Path
Heating - primary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
HR
HF
CHS
PRIMARY FLOW CHARACTERISTICS
ON DHW CH FAULT
RESET
CHS
ON DHW CH FAULT
RESET
CHS
HRHF

13
1,100
1,000
800
600
400
200
0
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800
Domestic Hot Water Flow Rate @ 48˚C - l/h
Primary Flow Rate I/h
Primary flow temperatures
55˚C
65˚C
75˚C
85˚C
Primary Flow Rate I/h
Primary
flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow
temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
1,100
1,000
800
600
400
200
0
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800
Domestic Hot Water Flow Rate @ 48˚C - l/h
Primary Flow Rate I/h
Primary flow temperatures
55˚C
65˚C
75˚C
85˚C
1,100
1,000
800
600
400
200
0
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800
Domestic Hot Water Flow Rate @ 48˚C - l/h
Primary Flow Rate I/h
Primary flow temperatures
55˚C
65˚C
75˚C
85˚C
HYDRAULIC CHARACTERISTICS HEATING - SECONDARY SIDE
HEATING
DHW - heat exchanger
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.25 m³/h
Hydraulic Characteristics
Heating - secondary side
Flow Path
Heating - secondary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
0
10
20
30
40
50
60
0 0.1 0.2 0.3 0.4 0.5 0.6
Flowrate -l/s
Pressure loss -kPa
3
2
1
Kv = 2.63 m³/h
UPS 15 - 60 pump settings
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
HRHF
DHW - heat exchanger
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.03 m³/h
Flow Path
Heating - primary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
HR
HF
CHS
DOMESTIC HOT WATER OUTPUT
ON DHW CH FAULT
RESET
CHS
HRHF

14
* After shut-off valves are installed the connections become a female 3/4’’.
** Not shown on components illustration.
CONNECTION A B C
Thread G¾” G½” G1”*
D E F Depth inc. Cover kg
65mm 450mm 550mm 265mm 16
• Single plate design hydraulically separates the domestic
water with the space heating supplied directly from the
central primary supply
• Internal electronic control unit with LCD display
• Can be set to modulate the heating flow circuit for greater
efficiency and to compensate for changes in the external
environment
• Complete with a heating support pump, as standard,
including a pump bypass loop in case of complete radiator
TRV shutdown
• Compact and lightweight
• Fully insulated EPP front cover
• Includes differential pressure control valve (DPCV)**
supplied and fitted to the base of the unit
• Ability to pre-heating of the DHW exchanger
FEATURES & BENEFITS
The Logic heat interface unit is the latest
‘intelligent’ range of Logic HIUs from Ideal.
The Logic HIU is the complete solution for
instantaneous hot water production and space
heating control.
This is a direct wall mounted HIU, providing 50
kW indirect instantaneous priority Domestic
Hot Water (DHW). Central Heating (CH) is
dependent upon the primary system design
and pump specification.
LOGIC HIU
50 DIRECT MEDIUM TEMP
F
AB
D
E
D
A B
D
C
C

15
LOGIC HIU
50 DIRECT MEDIUM TEMP
Maximum working pressure: 10 bar
Maximum temperature 85°C
Max. Percentage of glycol 30%
Max. Recommended primary
circuit flow rate
1.2 m³/h
PRIMARY PERFORMANCE
Heat Interface Unit MT
Primary ball valve set
Central heating flow & return valves
DHW inlet and outlet connection valves
Differential pressure control (DPC)
UIN PRODUCT NAME METERING OPTIONS
211095 Logic HIU Direct MT HIU only, meter not
included
211348 Logic HIU Direct MT Factory fitted, CF Echo 11
MbBus 1
211352 Logic HIU Direct MT Factory fitted, CF
Ultramaxx V MBus PS
Power supply 230 V (ac)±10% 50 Hz
Max. Power consumption 105 W
Protection class IP 40
Actuator Stepper 24 V
Probes NTC 10 kΩ
ELECTRICAL
Frame RAL 9010 sprayed steel
Protective shell cover EPP (Expanded polypropylene)
Components Brass BS EN 12165 CW617N
Pipes Stainless steel
Exchanger Brazed stainless steel
CONSTRUCTION
INCLUDED AS STANDARD
The temperature setting operates on the principle of set
point regulation and can be fixed within application limits.
HEATING
The DHW function takes priority over the heating function
controlled by the DHW priority flow switch.
Set Point DHW temperature 42 to 60°C
Max. Domestic hot water
pressure
10 bar
DHW circuit max. flow rate 18 l/m (0.3 l/s)
Min. flow rate to activate
domestic flow sensor
2.7 l/m ±0.3
Max. Differential pressure on
domestic water modulating
valve
Δp 0.9 bar
Min. Differential pressure on
domestic water modulating
valve
Δp 0.35 bar
Nom. DHW heat exchanger
net output
50 kW - Logic HIU 50
Direct MT
DOMESTIC HOT WATER - DHW
INCLUDING OPTIONAL PRE HEAT FUNCTION
Flushing By-pass
CF Echo II
CF Ultramaxx V
ACCESSORIES
Heating Set Point 50 to 75°C
Nom. heating net output As primary and heating circuit
controls permit
Heating circuit Maximum pressure rating: 10
bar as primary and heating
circuit
controls permit
Pump UPS 15/60
Pump bypass setting 0.45 bar
Heating control circuit VOLT FREE

16
DHW - heat exchanger
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.25 m³/h
Hydraulic Characteristics
Heating - secondary side
Flow Path
Heating - secondary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
0
10
20
30
40
50
60
0 0.1 0.2 0.3 0.4 0.5 0.6
Flowrate -l/s
Pressure loss -kPa
3
2
1
Kv = 2.63 m³/h
UPS 15 - 60 pump settings
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
HRHF
DHW - heat exchanger
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.03 m³/h
Flow Path
Heating - primary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
HR
HF
CHS
Hydraulic Characteristics - Heating Function
SATK 20103 - low temperature unit - UPS 15-60 pump settings
Kv = 2.04 m³/h
0
10
20
30
40
50
60
Flowrate -l/s
Pressure loss -kPa
3
2
1
0
10
20
30
40
50
60
0 0.1 0.2 0.3 0.4 0.5 0.6
0 0.1 0.2 0.3 0.4 0.5 0.6
0 0.1 0.2 0.3 0.4 0.5 0.6
Flowrate -l/s
Pressure loss -kPa
Kv = 2.12 m³/h
3
2
1
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.20 m³/h
0
10
20
30
40
50
60
Flowrate -l/s
Pressure loss -kPa
Kv = 2.12 m³/h
3
2
1
SATK 20203 - medium temperature unit - UPS 15-60 pump settings
SATK 20303 - high temperature unit
SATK 20403 - high temperature unit - UPS 15-60 pump settings
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
CHS
HYDRAULIC CHARACTERISTICS HEATING - PRIMARY SIDE
HYDRAULIC CHARACTERISTICS DOMESTIC HOT WATER - PRIMARY SIDE
HEATING
DOMESTIC HOT WATER
PRIMARY FLOW CHARACTERISTICS
CHS
HRHF

17
Primary Flow Rate I/h
Primary flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary
flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow
temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
DOMESTIC HOT WATER OUTPUT
DOMESTIC HOT WATER

18
* After shut-off valves are installed the connections become a female 3/4’’.
** Not shown on components illustration.
CONNECTION A B C
Thread G¾” G½” G1”*
D E F Depth inc. Cover kg
65mm 450mm 550mm 265mm 16
• Single plate design hydraulically separates the domestic
water with the space heating supplied directly from the
central primary supply
• Internal electronic control unit with LCD display
• Compact and lightweight
• Fully insulated EPP front cover
• Includes differential pressure control valve (DPCV)**
supplied and fitted to the base of the unit
• Ability to pre-heating of the DHW exchanger
FEATURES & BENEFITS
The Logic heat interface unit is the latest
‘intelligent’ range of Logic HIUs from Ideal.
The Logic HIU is the complete solution for
instantaneous hot water production and space
heating control.
This is a direct wall mounted HIU, providing 50
kW indirect instantaneous priority Domestic
Hot Water (DHW). Central Heating (CH) is
dependent upon the primary system design
and pump specification.
LOGIC HIU
50 DIRECT HIGH TEMP
F
AB
D
E
D
A B
D
C
C

19
LOGIC HIU
50 DIRECT HIGH TEMP
Maximum working pressure: 10 bar
Maximum temperature 85°C
Max. Percentage of glycol 30%
Max. Recommended primary
circuit flow rate
1.2 m³/h
PRIMARY PERFORMANCE
Heat Interface Unit HT
Primary ball valve set
Central heating flow & return valves
DHW inlet and outlet connection valves
Differential pressure control (DPC)
UIN PRODUCT NAME METERING OPTIONS
211096 Logic HIU Direct HT HIU only, meter not
included
211349 Logic HIU Direct HT Factory fitted, CF Echo 11
MbBus 1
211353 Logic HIU Direct HT Factory fitted, CF
Ultramaxx V MBus PS
Power supply 230 V (ac)±10% 50 Hz
Max. Power consumption 105 W
Protection class IP 40
Actuator Stepper 24 V
Probes NTC 10 kΩ
ELECTRICAL
Frame RAL 9010 sprayed steel
Protective shell cover EPP (Expanded polypropylene)
Components Brass BS EN 12165 CW617N
Pipes Stainless steel
Exchanger Brazed stainless steel
CONSTRUCTION
INCLUDED AS STANDARD
The temperature setting operates on the principle of set
point regulation and can be fixed within application limits.
HEATING
The DHW function takes priority over the heating function
controlled by the DHW priority flow switch.
DOMESTIC HOT WATER - DHW
INCLUDING OPTIONAL PRE HEAT FUNCTION
Flushing By-pass
CF Echo II
CF Ultramaxx V
ACCESSORIES
Heating Set Point Dependent on primary system
Nom. heating exchanger net
output
As primary and heating circuit
controls permit
Heating circuit Maximum pressure rating: as
primary and heating circuit
controls permit
Heating control circuit VOLT FREE
Set Point DHW temperature 42 to 60°C
Max. Domestic hot water
pressure
10 bar
DHW circuit max. flow rate 18 l/m (0.3 l/s)
Min. flow rate to activate
domestic flow sensor
2.7 l/m ±0.3
Max. Differential pressure on
domestic water modulating
valve
Δp 0.9 bar
Min. Differential pressure on
domestic water modulating
valve
Δp 0.35 bar
Nom. DHW heat exchanger
net output
50 kW - Logic HIU 50 Direct
HT

20
Primary Flow Rate I/h
Primary flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary
flow
temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
Primary Flow Rate I/h
Primary flow
temperatures
1,500
1,400
1,200
1,000
800
600
400
200
0
0 100 200 300 400 500 600 700 800 900 1,000 1,100
Domestic Hot Water Flow Rate @ 48˚C - l/h
55˚C
60˚C
65˚C
70˚C
75˚C
80˚C
85˚C
DOMESTIC HOT WATER OUTPUT.
DHW - heat exchanger
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
0.04 0.06 0.08 0.1 0.2 0.3 0.4 0.5
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.25 m³/h
Hydraulic Characteristics
Heating - secondary side
Flow Path
Heating - secondary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
0
10
20
30
40
50
60
0 0.1 0.2 0.3 0.4 0.5 0.6
Flowrate -l/s
Pressure loss -kPa
3
2
1
Kv = 2.63 m³/h
UPS 15 - 60 pump settings
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
CHS
HRHF
DHW - heat exchanger
Flowrate - l/s
50
10
1
0.5
20
30
2
3
5
Pressure loss - kPa
Kv = 2.03 m³/h
Flow Path
Heating - primary side
ONON DHWDHW CHCH FAFAULULTT
RRESETESET
11
22
HR
HF
CHS
HYDRAULIC CHARACTERISTICS DOMESTIC HOT WATER - PRIMARY SIDE
DOMESTIC HOT WATER
PRIMARY FLOW CHARACTERISTICS
CHS