Viessmann Vitocal 222-A - Page 11

11
Outdoor units, types 221.A10 to A16
1109
705
62
110
165
508
544
536
545
1377
126
133
176
223
590
637
48
518
A
D
C
B
A
B
C D
/
Fig. 3
A
Outdoor unit flow (heating water outlet) G 1¼
(union nut supplied, female thread)
B
Outdoor unit return (heating water outlet) G 1¼
(union nut supplied, female thread)
C
Power cable inlet
D
Modbus cable inlet for indoor/outdoor unit
Preparing for installation
Requirements for on-site connections (cont.)
5831412
Installation