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Type: Posts; User: hvac/airplanes

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  1. Replies
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    1,448

    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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    2,768

    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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    2,768

    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...
  6. Replies
    25
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    2,768

    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
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    2,768

    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...
  8. Replies
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    425

    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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    456

    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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    456

    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). ...
  13. Replies
    2
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    374

    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...
  20. Replies
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    1,203

    Looks like the drain pan is still vertical?

    Looks like the drain pan is still vertical?
  21. Replies
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    784

    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...
  22. Replies
    2
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    475

    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...
  25. Replies
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    743

    yes, the burner motor comes on each time.

    yes, the burner motor comes on each time.
  26. Replies
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    743

    Simple oil pump not so simple

    I replaced a seized oil pump today on an older oil furnace with same rpm, rotation, and gpm. Simple right? I called for heat and started the bleed and as I got a solid fuel column, system cut out...
  27. Thank you for your help, very appreciated.

    Thank you for your help, very appreciated.
  28. There is a regulator on the tank, then one more...

    There is a regulator on the tank, then one more at the house before it goes in the house. The one at the house is reading 11.5"wc. There is no other regulator before the stove. The stove is the...
  29. At the inlet of the gas valve. Downstream of 2nd...

    At the inlet of the gas valve. Downstream of 2nd regulator, inlet of gas valve.
  30. I also had the same readings awhile ago on a 2001...

    I also had the same readings awhile ago on a 2001 lp stove. Incoming press. at the gv was extremely low and at the house regulator I had 11.5"wc coming into the house. This one would light the main...
  31. freestanding LP stove input gas pressure issue?

    Why am I reading only about 1.5" w.c. for incoming pressure at propane free standing gas valve. I'm getting about 12"wc at meter next to the house. The stove is working ok, my meter is digital and...
  32. Replies
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    Thanks for the advice, I will give this a shot...

    Thanks for the advice, I will give this a shot and let you know what I find.
  33. Replies
    5
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    1,081

    exhaust fumes from oil furnace

    I had a customer complaint about smelling oil from furnace during a call for heat but only before fan kicked on. Once fan energizes, the smell went away. I smelt a faint oil smell once I arrive. ...
  34. Replies
    5
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    1,031

    Wow, I feel stupid, excuse me while I crawl under...

    Wow, I feel stupid, excuse me while I crawl under a rock and die.
  35. Replies
    5
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    1,031

    Older Wayne oil burner

    I was on an older wayne oil burner and found the fuel pump seized. Pump is single stage and has no markings on it whatsoever. From my understanding, the older pumps are 1725 rpm. This one is...
  36. gas fireplace, where is the thermocouple?

    Went on a call today for a blazeking pegasus 9300. Pilot won't stay lit. I removed the logs to gain access to pilot assy. The assy. only has a pilot hood, ignitor and a thermopile. What on this...
  37. Replies
    1
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    609

    Amana wall mounted heat pump

    Went to check out two wall mounted heat pumps, both only working in EM heat. The first one, compressor and condenser fan not coming on. No schematic with unit. Compressor windings and dual cap...
  38. Replies
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    1,515

    Thank you everyone who responded to my thread. ...

    Thank you everyone who responded to my thread. Sure is good to get quality answers on some unfamiliar topics.
  39. Replies
    5
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    1,515

    vent draft regulator for oil furnace

    I haven't done a lot with oil furnaces so I ask lots of questions when I can. Is a draft regulator required for a vent pipe venting out the chimney?
  40. Replies
    8
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    1,367

    Manual J Software

    Does anyone have any suggestions on manual J software. I've heard of several different ones on the market and I may be looking into purchasing after doing the last two load calculations by hand. I...
  41. Replies
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    1,985

    1.00 80 deg. A. I've heard of people changing...

    1.00 80 deg. A. I've heard of people changing nozzle sizes, but I'm not sure if that is a good idea and how it will effect the overall system operation.
  42. Replies
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    1,985

    I don't recall the blower having a run cap., but...

    I don't recall the blower having a run cap., but will check. The squirrel cage was a little dusty but nothing major. When the fan did kick on, it did seem to run pretty slow for high speed. ...
  43. Replies
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    1,985

    oil furnace tripping on high limit.

    Went on a "no heat" call to find system tripping on high limit. I had a 70 deg. RA and a 238 deg. SA!!! The blower motor is working at 120v on high speed. I found no obstruction in the RA duct,...
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