VAV electric reheat not working
VAV electric reheat not working
(OP)
Hey guys, just got a call that the reheat coils for a job we did are not working (when thermostat set higher, heaters not kicking in). Now these are five 8" titus single duct boxes with 2kw heaters. The heating cfm's range from 90-120cfm. I think that they are heating the air too high and tripping a high limit cutout. I did the calcs and the 90 cfm minimum box would heat the air to 122 deg, when I want it around 95. I am thinking that they can adjust the minimum damper position for heating mode. Is this correct? I will bump the minimum up to around 200 cfm.
This of course after we check that the thermostats are hooked up and everything electrically is in order.
Am I right?
This of course after we check that the thermostats are hooked up and everything electrically is in order.
Am I right?





RE: VAV electric reheat not working
Moreover, your assumuption would be probable if heater is controlled by some intelligent electronic controller, otherwise it should have either flow or temperature switch or both, but would trip at first.
RE: VAV electric reheat not working
It's tricky when we get a call that something we did isn't working, and it's really easy to over think the problem and make assumptions. Whatever you do, eliminate speculation.
www.ellisconsultingengineers.com
RE: VAV electric reheat not working
RE: VAV electric reheat not working
RE: VAV electric reheat not working