Type: Posts; User: valentyn
Try this www.nest.com
According owner - 4 times per 2 year.
It`s depend what you reading.
Rich apartment in NY, customer complain - no air flow.
Two 18000 Btu unit , no heater, no panel for close opening and no insulation on front cover on unit.
Almost 50% air circulation inside in...
No, it"s not the steps, this is a grill.
Can you check pressure and amps on compressor in moment when compressor stop running.
Because for me going over there is little bit difficulty , I ask my baddy go and check chill water valve on fan coil system.
It was fun, I have to pull him out.
Inlet Water valve may be leaking.
I once had a problem with this machine,sometimes valve close properly, sometimes
water leaking through.
Customer complain about economizer on big a/h.
After lot digging
Try this: run condensing unit with fan motor off. Build head pressure to 400 psig. Stop unit by disconnect , make sure reversing valve energize. If reversing valve leaking you might be able to hear a...
This is unique a/h unit. NYC building on 37 th floor. Outside on the terrace. Rain, snow ets.
No air filters, poor return air flow.
Some "Rules of Thumb"
Size supply plenums to the flanged opening of the blower outlet, not to the extents of the AHU or fan/coil cabinet.Supply plenum length should be 2.5 times the blower outlets...
Why its unit leaking all time ? Strange :whistle:
From Service Handbook:
Ice Formation Pattern
Evaporator ice formation pattern analysis is helpful in
ice machine diagnostics.
Analyzing the ice formation pattern alone cannot
diagnose an ice...
Try this http://www.filefactory.com/file/ah92aad/n/TR35743_20Rev_201006_pdf
Application Engineering Bulletin
AE-1294 August 1, 1992
MEGOHM VALUES OF COPELAND COMPRESSORS
......There are many factors that affect megohm
readings including contaminated refrigerant,...
Start capacitor shorted ?
How you tested?
Most start capacitors has dielectric housing.
Yes, if compressor running.
Yes, its common for 3 phase motor,
if one leg short to ground other short too.
Compressor Replacement after Motor Burn
In the case of a motor burn, the majority of contaminated
oil will be removed with the compressor.
The rest of the oil is cleaned...
Check the resistance and voltage
According Copeland :
Start Wdg: 1.4
Run Wdg: 0.59
Definitely restriction in system.