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- Thu Jun 18, 2015 2:17 pm
- Forum: Hvac, Heating Opentherm Forum
- Topic: Viessmann Vitodens 100-W with Honeywell ST9520C Programmer
- Replies: 0
- Views: 4932
Viessmann Vitodens 100-W with Honeywell ST9520C Programmer
I have a Viessmann 100-W WB1C system boiler, 4-pipe configuration, with a two-zone heating system controlled by a Honeywell RF2 Pack 5 kit which consists of one Honeywell ST9520C Programmer with built in wireless receiver and two Honeywell DT92e wireless room thermostats. honeywelluk.com/products/Sy...