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Type: Posts; User: hvac/airplanes

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  1. Replies
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    Lennox mini-split headache

    I will first start by saying that everything was done as per install manual on this installation. This was Lennox model # MS8-ZO-24P3. I installed two indoor heads and my total lineset length was...
  2. The fan is belt driven with split pulley. The...

    The fan is belt driven with split pulley. The furnace is not ducted, I didn't check the temp. split or the stack temp (I should have), and the furnace is approx. a 1974 model. Customer is having...
  3. Porter oil furnace tripping on high limit

    Customer has a Porter oil furnace in her living room that is tripping on high limit. I replaced the oil nozzle with like- 80degA .50gph, which is what this furnace calls for. pump press. at 100psi...
  4. Replies
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    1,785

    Thank you everyone for all your professional...

    Thank you everyone for all your professional input. I will make a list and implement your suggestions.
  5. Replies
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    1,785

    overfire draft= .02", breech= .04", smoke test=...

    overfire draft= .02", breech= .04", smoke test= failed, gross stack temp.= 400deg., CO2= 9%. Stack temp. would probably be higher if burner wasn't cycling on limit side of fan/limit control every 4...
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    1,785

    overfire draft was .02" and breech was about...

    overfire draft was .02" and breech was about .04". Burner blower was clean, I didn't check the pump pressure and I hadn't cleaned the vent before I did my comb. analysis. Could pump press be...
  7. Replies
    25
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    1,785

    oil burner heavy heavy sooting

    I performed an anual service today on an williamson lowboy with a wayne oil burner. When it came to my combustion analysis, my smoke test revealed heavy sooting. I'm not talking off-white on my...
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    395

    coleman evcon ac

    How does one frontseat/backseat service valves on coleman evcon residential condenser. Removed service caps and was baffled. Had to recover entire charge just to leak check. Thank You-
  9. who said anything about a fireplace?

    who said anything about a fireplace?
  10. Y or G controlling fan speed in cool mode?

    This one has been bugging me. When you call for cooling at stat, Y is energized and so is G. So does the IFC board determine fan speed based on 24v from G and one other input such as W or Y? I...
  11. Replies
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    419

    Anyone know where I could find one. Gensco and...

    Anyone know where I could find one. Gensco and Johnstone don't have them in catalog. Also, if it is seeping out wheep hole in off position, is this normal, I wouldn't think so.
  12. Replies
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    419

    Oil Safety Valves

    Went out on a leaking oil furnace today. They have a Oil safety valve in the supply line. It reads 60psi max press. stamped on the housing. It is leaking out the weep hole( installed vertically). ...
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    361

    5 conductors to heat pump

    Went on a call for heat pump with fossil fuel back up. Heat pump stat acting up. Customer told me they wanted a stat that would lock out the compressor at low ambient, just like the one they have- ...
  14. water source heat pump evap. freezing up

    Went on a call for a water source heat pump. Evap. coil freezing up. Both coil and filter a little dirty but not plugged. Ambient temp. about 70 deg. Blower motor on high and working fine. My...
  15. Munchkin boiler 8 pulse fault code.

    A lady from our church had a munchkin model #80m boiler put in 12 years ago. She said it has had the same problem since day 1. System tries to fire but then locks out on 8 pulse code: air press....
  16. Is insulating trunk line always necessary in unconditioned space?

    I worked for a contractor who always ran rigid 26 or 24 ga. galv. for residential even in insulated crawl spaces. Worked for another contractor who ran ductboard most of the time. My question is,...
  17. downflow

    downflow
  18. model: GHR26Q3/4-100-7 sn: 5800 D 29250

    model: GHR26Q3/4-100-7 sn: 5800 D 29250
  19. Lennox 90% press. switch failure fault code.

    Ok, here we go, sorry for the length of this post but I wanted to get everything in here. No Heat call, showed up to furnace blinking press. switch fault code. Removed comb. air vent first, put...
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    Looks like the drain pan is still vertical?

    Looks like the drain pan is still vertical?
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    oil furnace electrodes

    Hey guys,
    Performed oil burner service today. I measured electrode gap, distances from nozzle, etc. before removing nozzle. I put electrodes back into position. 1/16 in front of nozzle, 1/8 gap...
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    445

    manual J software

    I'm looking at purchasing a manual j software program to speed up the load calculation process. Anyone have any good suggestions or feedback on some recommended programs? Thank you
  23. I forgot to mention the outside winter design db...

    I forgot to mention the outside winter design db here is 5 deg. I spoke with a guy I used to work with at another company with a similar climate and he said they size all their heat pumps for heat...
  24. heat pump sizing with fossil fuel back up

    I know it's ok to upsize a heat pump 25% when used for heating and cooling when using elec. em/aux heat. But when you are sizing for a dual fuel set up do the same rules apply. The reason I am...
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    yes, the burner motor comes on each time.

    yes, the burner motor comes on each time.
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