Thx for the reply. Now according to the tech bulletin(from Oct 2004) on page 4 that a separate transformer is required. The "note" says..."the BMP supplies power to all connected modules.
1.Does this mean that one independent transformer can be used for multiple modules? The note goes on th say"...no need to power up modules separately. This would make me think that the answer to Q1 is yes but what if the units are so far away that runs that long were cost and structurally prohibitive. Then would not seperate transformers be the answer. (for lack of a better decscription the units are on the 4 corners of a 10k sq foot box)
The note goes on to say"...improve design and reduces the possibility of polarity reversal"
2. What would that look as far as the wiring connections go? These units are wired up with relays and don't have a seperate transformer.
3. Is there a protocol that would call for using relays (I assume that since the TB is dated 2004 that the installation was 2004.
Now I actually got an opportunity to talk with the previous owner and he indicated that "... he had been told his units were wired in "reverse polarity". He also stated that he has had incidence of 2 of his 4 units just stop working and after a total shut down they start working again. Now doesn't this sound unusual and thus by Q2. I want to know what to look for and should the "seperate power supply issue be addressed because they are functioning however as indicated there are some problems.
4. Based on "Power solutions chart on page 9 there is added current draw with this system thus the need for seperate power supply. There have been incidents of humidity damage...maybe the damper aren't operating properly.
5.Now if there needs to be a seperate transformer would it need to have its own circuit from the breaker box with disconnect or could it tie inwith the line power to each unit and maybe increase the disconnect rating?
I was always taught that any system should not be made just to work but to work the way it was intended. and I would appreciate your assistance in getting this right