Rated 5 out of 5
Â by MartynS Danfoss HP22 2 Port
Bought to replace Sunviv SZ2301. Only needed the motor/switch part due to micro switch sticking on Sunvic unit [boiler running all the time]. 20 minute to swap the unit. As stated by another reviewer Sunvic unit lasts about 2years then problems, hope the Damfoss does better.
Consult an electrician if unsure about the wiring.
6 Apr 2015
Rated 5 out of 5Â by plaetdon I am personally bias
Have always preferred Danfoss control components. It is exactly what I expected so satisfied with my purchase.
30 May 2014
Rated 1 out of 5Â by Hesperus Limited Life
Had four of these professionally installed as part of a large installation. Three have failed within 2 years. The valve seems fine, it is the motorised head that stops working - but it seems you need to buy the complete assembly to replace just the head. Fortunately it is easy to replace - just held to the back plate by two screws. When working they're fine but cannot recommend them for durability. If another one fails I will definitely look for an alternative make.
19 Oct 2013
Rated 5 out of 5Â by flyangleruk Quality product
fitted by qualified electrician and works well, not expensive for the job.
12 Mar 2011