Boiler Power Supply Connection - Viessmann Vitocrossal 300 CU3A 26 Installation Instructions Manual
Floor mounted, gas-fired condensing boiler with matrix gas burner and lambda pro control
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Also See for Vitocrossal 300 CU3A 26:
- Technical data manual (33 pages) ,
- Service instructions manual (116 pages) ,
- Operating instructions manual (44 pages)
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Vitocrossal 300 CU3A 26 to 199 Installation
Connections
(continued)
Legend
20
Boiler pump/heating circuit A1 pump / zone circuit pump
21
DHW pump
28/20 DHW recirculation pump (see service manual)
Pump connection
Note: See wiring diagram on page 57 for connection
to the control base.
Note: Maximum pump draws 2 FLA each. All 120VAC
outputs must not exceed 6 FLA.
Power/pump connection interface
Control Connections
39
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