LK International UFH - Wired Control Upgrade GATESHEAD, NORTH EAST

[T1000]

Wired Control Upgrade

Have a 3 zone LK International UGH system which has now been in for 7 years.
OIM paperwork supplied with system, indicate it uses:
NC 24V AC Actuators and Wired NC 24V AC Thermostats connected by a NC Connection Box
Belimo 24V rotary actuator for blending controlled by a EMR-12 temperature controller.
Boiler was replaced a few month ago to latest Worcester Highflow 440CDi with flow temp to UFH set at 45 Deg C, so in reality with this new boiler I guess the Belimo thing is probably not doing much blending.
Have attached some images for reference.

Were looking for someone who can upgrade the old LK Room Stats to latest Heatmiser ones

Would also be interested if anyone could shed any light on the fact that the UFH circualting pump last about 12 months then stops circulating water through the floors...... (7 years ..7 pumps !!!).
We keep a spare ready, when one packs up, swap it over and it's off and running again.
Strange thing is all the old pumps look mechanically fine, shaft spins, very clean, impeller all good and attached to shaft etc, electrics all look OK as well..... but they don't circulate the water.

 

[Ermintrude]

For a start wilo pump 5 year wazza! Plus it's probably set up incorrectly and circulating 24/7

 

[T1000]

For a start wilo pump 5 year wazza! Plus it's probably set up incorrectly and circulating 24/7

Na pump only runs when actuators are "popped up" and room stats calling for heat..... once stats / rooms satisfied the pump powers down

 

[IDCHAPPY]

I can only think that at some stage the pumps are running against a dead head, which they don't like. you should get more than 1 year out a pump buddy 🙂