Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual page 27

Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Electrical Connections
(continued)
Connecting Pumps (continued)
120V pumps with an amperage draw of <2FLA
Legend
A DIN rail (located in the junction box)
B Pump
120V pumps with an amperage draw of >2FLA
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
Installation
27