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My GB-142

Ray M
Ray M Member Posts: 94
in THE MAIN WALL
It is a brisk 28 degrees this morning. My panel rads are purring along at 118 degrees AWT. Does it get any better than that? The desine temperture is 135 AWT @ 14 OAT. I have installed a Johnson A-419 temperture control as a outdoor starter along with the new AM-10{removed the RC-10}for constant circulation. The upper floor has TRV'S mounted on each rad and the bathroom has a towel warmer with no TRV for constant flow. I also have two other panels with only hand valves to eliminate the need for a pressure bypass valve. The grundfos 15-58 runs fine on speed 2. This boiler is AWESOME. I have installed 4 so far and my customers are amazed. Photo's to follow.

Thanks

Ray M

Comments

  • Joe@buderus_2
    Joe@buderus_2 Member Posts: 302


    The temperatures you are running sound great. Any idea what the return water temperature is? Do you have any info on the Johnson control? Please post some pictures.
  • Ray M
    Ray M Member Posts: 94
    pic's

  • Ray M
    Ray M Member Posts: 94
    pic's

    Quick pics. More to follow.

    Thanks
    Ray M
  • Unknown
    Unknown
    outdoor temp starter

    118° F very nice.

    i've been experimenting to find the best (costwise and functionality) device for an outdoor temp circ starter and the winner is: a tekmar 508 thermostat with the slab sensor output hijacked as an outdoor sensor. you can see the outdoor temp on the display and make adjustments, (unlike a themostat mounted in an outdoor box) and is less costly than a digital aquastat.
  • Ray M
    Ray M Member Posts: 94
    Outdoor starter

    The A-419 is around 60 dollars. We use them for DHW control,buffer tank control and refrigeration. The adjustability of this control is outstanding. Short cycle protection,differential and eeprom memory. No i dont work for Johnson but i do a lot of control work.

    Thanks
    Ray M
  • Ray M
    Ray M Member Posts: 94
    Return temp's

    The delta T is variable as the TRV'S modulate. I will install my Logit this week and take some readings. The thermometer's on the pumping stations are not as responsive as the Logit. I will keep you informed.

    Thank's

    Ray M
  • Ted_9
    Ted_9 Member Posts: 1,718
    gb

    Nice job.

    Like the controls ideas guys.

    I started using Buderus pump and mix stations now. I like them, quick, easy and consistant.

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