1
Function
The SATK series HIU allows independent control of heating and
domestic hot water production within centralised heating systems.
Technical specifications
Materials
Frame:
galvanised steel
Heat exchanger:
braze welded stainless steel
Fitting pipes:
copper
Components:
brass EN 12165 CW617N
Performance
Medium:
water, max. 30% glycol
Maximum medium temperature:
85°C
Maximum operating pressure: - primary circuit:
10 bar
- domestic hot water circuit: 10 bar
Nominal DHW heat exchanger net output:
40 kW
DHW circuit flow rate:
min 1,8 ± 0,3 l/min
max 18 l/min
Hydraulic characteristics: primary/heating circuit:
kv 2,9
Weight:
6 kg
Component specifications
Connections:
- primary circuit:
3/4” M
- heating circuit:
3/4” M
- domestic hot water circuit: 1/2” M
Contents of pack:
- HIU
- Instruction sheet
Key to symbols
Primary circuit flow
Primary circuit return
DHW out
Secondary circuit flow
Secondary circuit return
DCW in
Wall-mounted heat interface unit, instantaneous domestic hot water production
SATK12313
INSTRUCTIONS FOR INSTALLATION, COMMISSIONING AND MAINTENANCE
© Copyright 2014 Caleffi
78228EN
www.caleffi.com
Characteristic components
1 - DHW priority valve
2 - Manual by-pass
3 - 40 kW brazed heat exchanger
The DHW priority valve (1) controls
priority of the production of domestic hot
water in the presence of a DHW circuit
demand.
The heating circuit is always active when
there is no DHW tapping; we recommend
the use of a zone valve or thermostatic
valve on the heating circuit.
A
350
28
G
C
3/4”
88
I
B
194,5
93
H
1/2”
58
D
L
100
65
E
M
163
134
F
N
A
B
C
E
D
I
F
H
N
M
I
I
I
L
L
E
G
Dimensions
