Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual page 28

Installation
Electrical Connections
28
(continued)
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Connecting Pumps (continued)
240V pumps
Contactor specification 120VAC 1A
Legend
A DIN rail (located in the junction box)
B Contactor/relay (field supplied)
C Pump
D Power supply w/disconnect and protection
208/460/575V 3 phase pumps
Contactor specification 120VAC 1A
Legend
A DIN rail (located in the junction box)
B Contactor/relay (field supplied)
C Pump
D Power supply w/disconnect and protection