Multi Connection - Viessmann VITOCROSSAL 300 Installation Instructions Manual
Vitocrossal 300
cu3a series 26 to 57
floor mounted, gas-fired condensing boiler with matrix gas burner and lambda pro control
for operation with natural gas and liquid propane gas
heating input 19 to 199 mbh
5.6 to 58 kw
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Also See for VITOCROSSAL 300:
- Service instructions manual (164 pages) ,
- Service instructions for contractors (148 pages) ,
- Service manual (108 pages)
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Control Connections
Vitocrossal 300 CU3A 26 to 57 Installation
Connections
(continued)
Multi connection
Normally closed safety connection A.
Remove jumper (not shown) to install a field supplied
normally closed relay.
IMPORTANT
The relay must be rated for 120VAC 5 FLA
Power/Pump connection interface
Power/pump connection interface
A
Multi connection
Note: See wiring diagram on page 50 for connection
to the control base.
35
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