45
Plug
sXS
Terminals
Function
Explanation
222.3
222.4
Switching external heat
source with two high limit
safety cut-outs (max. 70 °C)
to protect the heat pump and
to stop the secondary pump
Zero volt contact
Note
■ The switching contact is a zero volt
N/O contact that is closed when a heat
demand is issued.
■ Never route low voltage via this con-
tact; that requires an on-site relay.
■ The boiler water temperature sensor in
the external heat source (plug F20)
must capture the average temperature
of the external heat source.
Connection values (contact loads):
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect the high limit safety cut-out on
site:
■ In series to the secondary pump (ter-
minal 211.2 on the main PCB).
■ In series to the switching of external
heat sources.
Installation sequence
Electrical connections
(cont.)
5601 429 GB
Installation
Содержание 7424689
Страница 83: ...83 Opening the programming unit 1 3 2 2x Troubleshooting Repairs 5601 429 GB Service ...
Страница 84: ...84 Removing cover from programming unit if necessary 5 4 4x Troubleshooting Repairs cont 5601 429 GB ...
Страница 85: ...85 Placing the control panel in its service position 4x 2 3 1 Troubleshooting Repairs cont 5601 429 GB Service ...
Страница 86: ...86 Removing the separating plate 1 2 Troubleshooting Repairs cont 5601 429 GB ...