4
Heating system designs
System version 1
Direct connection to heating circuit loop
A Vitotronic 050
B Power/pump module
C Heating circuit
D Supply manifold
E Return manifold
F Power supply 120 VAC, 6FLA
! Outdoor temperature sensor (ATS)- X3 socket
(see page 7)
? Supply temperature sensor - X6 socket (see page 7)
sÖ Heating circuit pump (wired from PPM)
fÖ Power supply to Vitotronic 050 (wired from PPM)
aVD Connection for external controls - X5 socket
(see page 11)
Electrical connection
B Power/pump module
G Power supply 120 VAC, 6FLA
H Heating pump
I Limit aquastat (optional)
Note: Add jumper from terminals L-L when making limit
connection
Specification
Setting range: 0 to 80 ºC / 32 to 176ºF
Switching differential
Immersion thermostat: max. 11 ºC / 22 ºF
Contact thermostat: max. 14 ºC / 27 ºF
Electro-mechanical limit aquastat according to the liquid
expansion principle.
Switches the heating circuit pump OFF, when the set
value has been exceeded.
In such cases the supply temperature reduces only
slowly, e.g. it may be several hours before the system
restarts again automatically.
5285 967 v1.2
H
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