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Central Heating & Storage Heaters Forum
Commercial heating system help needed
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<blockquote data-quote="Phil Saunders" data-source="post: 459373" data-attributes="member: 29909"><p>Hi everyone </p><p> I'm looking for info.... </p><p></p><p> I've bought a building which is now domestic but was a commercial building. It has an oil fired boiler (actually 2 boilers) which supplies 2 heating zones and DHW.</p><p></p><p> In spite of being idle (switched off completely and drained) for approximately 4 years the plant fired up and ran perfectly needing nothing more than new nozzles and a good clean - from a mechanical point of view. The control system is another matter however.</p><p></p><p> It has a landis &amp; gyr Osc21 controller which has an E2 error code and a pair of reh3 compensated controllers which I know the purpose of but don't understand at all. </p><p></p><p> Does anyone have any documentation regarding either of these devices?</p><p></p><p> I also suspect wiring faults (which are all cabled in pyro) but getting the thing programmed correctly would help before I go chasing ghost faults</p><p></p><p>I also have a couple of frozen 3-port valves in the plant room. The actual valve part is fine (I can operate them manually) but the actuator head is frozen. Can I remove this to strip it down without disturbing the plumbing? </p><p></p><p>Thanks for any help. </p><p></p><p> </p></blockquote><p></p>
[QUOTE="Phil Saunders, post: 459373, member: 29909"] Hi everyone I'm looking for info.... I've bought a building which is now domestic but was a commercial building. It has an oil fired boiler (actually 2 boilers) which supplies 2 heating zones and DHW. In spite of being idle (switched off completely and drained) for approximately 4 years the plant fired up and ran perfectly needing nothing more than new nozzles and a good clean - from a mechanical point of view. The control system is another matter however. It has a landis & gyr Osc21 controller which has an E2 error code and a pair of reh3 compensated controllers which I know the purpose of but don't understand at all. Does anyone have any documentation regarding either of these devices? I also suspect wiring faults (which are all cabled in pyro) but getting the thing programmed correctly would help before I go chasing ghost faults I also have a couple of frozen 3-port valves in the plant room. The actual valve part is fine (I can operate them manually) but the actuator head is frozen. Can I remove this to strip it down without disturbing the plumbing? Thanks for any help. [/QUOTE]
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