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Type: Posts; User: mark schofield

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  1. Replies
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    887

    why Siemens?

    Given that both systems are just about as good, what are your supervisors reasons for the addition of the new controls system? Price, function, relative working for Siemens, ect? Perhaps if some of...
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    2,145

    auto feed ?

    If there is an auto feed valve in the make-up watersupply line to the boilers, could the valve possibly be broken allowing water into the system above the valve set preasure?
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    1,382

    duct tape

    For about twice the cost, you can buy a metal (tin foil) faced duct tape. Seems to last longer and is incredibally sticky. From a duct work supply house.
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    2,369

    There are many days in the New Haven CT area when...

    There are many days in the New Haven CT area when the temperature will remain below freezing while the cooling load in the rooms (classrooms) serviced by the heat pumps will be above setpoint. ...
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    2,369

    A smaller BAC tower at one of our schools...

    A smaller BAC tower at one of our schools services about 40 WSHPs. The tower has both fan and pump for the water in the sump. Because the water in the closed loop servicing the heat pumps goes both...
  6. Thread: JCI LCP

    by mark schofield
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    3
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    647

    The LCPs I had configured to sense boiler or loop...

    The LCPs I had configured to sense boiler or loop temp would fluctuate between the actual temp and -57 deg. I think if you short the sensor thats what you will get. or open the circut - I can't...
  7. Thread: JCI LCP

    by mark schofield
    Replies
    3
    Views
    647

    I never had any " on disk" files for the LCP....

    I never had any " on disk" files for the LCP. Only the manuals, which weren't to deep on diagnosing electrical/electronic problems. I have sent a few back JC parts to be rebuilt. On those occasions...
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    Before you pull cool basement air via the open...

    Before you pull cool basement air via the open cellar door, consider what type of heating and hot water systems you have in the cellar. If you have an oil fired boiler with tankless (like me) or...
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    976

    I occasionally convert 4-20 ma to 0-10 vdc for...

    I occasionally convert 4-20 ma to 0-10 vdc for our Johnson Controls controllers. Johnson specifies 1/4 watt 499 ohm resistors. Could that 1 ohm be a problem?
  10. Has anyone used a UNT controller for outdoor air...

    Has anyone used a UNT controller for outdoor air reset on a residential boiler (WM WTGO3). The domestic hot water isn't a problem because I'm feeding the tankless coil from a solar tank, so DHW...
  11. Replies
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    1,273

    how did you make out with the Companion panel?

    how did you make out with the Companion panel?
  12. Replies
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    we are still running Companion front ends at our...

    we are still running Companion front ends at our school system. As the Esperite terminals died, I would replace them with PCs and access with Hyper Terminal. VT100. 9600 baud. hardware flo control....
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    1,123

    I'm trying to get a bit more fresh air in one...

    I'm trying to get a bit more fresh air in one bank of rooms in one of the schools in our district. The AHU is configured mixed air dual path multi zone hot/cold deck reset. Rather than raise the...
  14. Casturbo, thanks for your reply. You're right in...

    Casturbo, thanks for your reply. You're right in that the Carlin leaves nothing behind. And I guess I'm lucky because my oil company suggests all the low end stuff I can do myself - oil filter, air...
  15. Two years ago I replaced a 25 year old Williamson...

    Two years ago I replaced a 25 year old Williamson Tempmatic Low Boy - the one with tke round heat exchanger - with a Williamson Centenial LowBoy - with the square heat exchanger and two inspection...
  16. thanks for the replies. this isn't a cold start...

    thanks for the replies. this isn't a cold start situation. the boiler has a tankless coil for DHW so it stays on all the time, mostly hovering around the low limit and it's differential. 170hi/140lo
  17. I've been monitoring the temps and preasures on a...

    I've been monitoring the temps and preasures on a new WM WTGO3 boiler 3 zone baseboard Taco 007 pumping away primary loop only. All goes well as explained in Dan H's book. However, on a call for...
  18. Replies
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    2,109

    Has anyone had any experiences with this OA reset...

    Has anyone had any experiences with this OA reset controler. I finished installing a WM WTGO3 a few months ago with no problems. I've been researching all the various reset options - Heat Manager,...
  19. Replies
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    1,789

    Unfortunately for us, the cooling towers are part...

    Unfortunately for us, the cooling towers are part of an open loop which supplies water to a heat exchanger inside the building. The water from the heat pumps (closed loop) is heated by an exchanger...
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    I went to the JC Institute in Denver a while back...

    I went to the JC Institute in Denver a while back for the one week ASC engineering course. $1200. well worth it.
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    1,789

    sorry - that should have been "cooling/heating"

    sorry - that should have been "cooling/heating"
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    1,789

    In Guilford, Ct, 15 miles north of New Haven. Our...

    In Guilford, Ct, 15 miles north of New Haven. Our school system, three of the schools each have a BAC cooling tower (open loop to heat exchanger) servicing Trane/Command Air heat pumps with reversing...
  23. Replies
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    824

    and I guess to reset the system supply temp,while...

    and I guess to reset the system supply temp,while maintaing enough boiler heat for the tankless coil I'd have to replumb to primary and secondary loops with bypass and a modulating valve. Kind of...
  24. Replies
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    824

    spelling error

    please disregard "VASVX". also for the tankless coil, "cirrulator relay" should read "boiler relay". Sorry
  25. Replies
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    824

    I recently put in a new WM WTGO3 oil fired to...

    I recently put in a new WM WTGO3 oil fired to replace my old boiler. In my travels around the internet I came across the Beckett Heat Manager, which accomplishes sVASVXupply reset depending on sensed...
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