Connection Diagrams - Bosch ISM 1 Installation Instructions Manual

104 | Installation
3.4

Connection diagrams

For the four solar thermal systems (the four standard systems with possible options), the required
connections to the ISM modules are shown in Fig. 18 to 23.
Legend to Fig. 20 to 23 from page 120:
DWU1 Valve, return flow raising
DWUC Priority/secondary valve (option C)
DWUF Valve, temperature differential control
(option F)
FK Solar collector
HK Heating circuit
ISM 1 Module for standard solar thermal
systems
ISM 2 Module for extended solar thermal
systems
HP Heating circuit pump
KW Cold water connection
NTC Temperature sensor connection
1...6
PA Solar circuit pump for collector array 2
PB DHW circulation pump for DHW
transfer system(option B)
PD Secondary circuit pump for solar
thermal systems with external HE
(option D)
PE Circulation pump for thermal
disinfection (option E)
R Connection for pump or diverter valve
1...6
RE Flow rate adjuster with indicator
RV Non-return valve
SB Gravity brake
SF Cylinder temperature sensor (heating
appliance)
SP Solar circuit pump for collector array 1
T Collector temperature sensor array 1
1
T Cylinder temperature sensor, bottom
2
(solar cylinder)
T Cylinder temperature sensor at the
3
same height as the heating return
(solar cylinder)
T Heating return temperature sensor
4
T Cylinder temperature sensor, top
5
(solar cylinder)
6 720 645 355 (2010/09)
T Standby cylinder temperature sensor,
6
bottom
TA Collector temperature sensor for
collector array 2
TB Cylinder temperature sensor for
cylinder 2 in the transfer system
TB Temperature limiter
1...2
TC Cylinder temperature sensor on
priority/secondary cylinder
(cylinder C)
TD Temperature sensor on externalsolar
circuit indirect coil
TWM Thermostatic DHW mixer
WW DHW connection
T Heat source temperature sensor for
F1
temperature differential control
(option F)
T Heat sink temperature sensor for
F2
temperature differential control
(option F)
UL Transfer pump to heat the standby
cylinder from the solar cylinder
(systems 3 and 4)
WS Solar DHW cylinder
S
WS Cylinder 2 (cylinder B) for DHW
B
transfer system
WS Priority/secondary cylinder
C
(cylinder C)
WS Standby cylinder (systems 3 and 4)
N
WT Heat exchanger
WWKG DHW comfort assembly
Z DHW circulation connection
ZP DHW circulation pump (if direct
connection to heating appliance is not
possible, connect to IPM)
en