Hi, I've been working on an Osborne bottle cooler which hasn't been achieving temperature.... suspected it to be short of refrigerant due to high internal temperature and lack of cooling back to compressor. There was no service point to add my gauges to and the service point too short to add a temporary one to check unit pressures. I used a quick release type service tap and reclaimed what was in and was a tad short so added a braised service point and regassed after leak checking.
When I ran the unit the temperature began to drop , although seemed a little slow and seemed to take a little longer than would probably be expected. The temperature only came down as far as 11 degrees yet the pressures seemed reasonable I.e not running in a vac or any signs of possible blockage etc, the condenser is clear and both condenser fans are running.... also both internal fans are running yet the compressor is ridiculously hot. After around a hour to hour and half the compressor temperature got up to 94 degrees, I know compressors on some bottle coolers can run a little warmer than other systems but not as hot as this is. I checked electrics on it and everything seems good but was suspecting perhaps it isn't pumping as efficiently as it should be and just generating huge amounts of heat.
Any ideas what could be causing it, and best method of checking pump quality? I thought about removing charge and running it with nothing in to see how low of a vac it can pull but not sire what would be a good result, should it be strong enough to pull my gauges into complete vac as low as they will go and if not then that's the issue?
Don't really want to condemn it if it isn't faulty but I can't see what else it could be....I've only had one compressor that's needed pump testing before and that had rotarlock valves on so could do it with charge in system and when tested it barely moved.
When I ran the unit the temperature began to drop , although seemed a little slow and seemed to take a little longer than would probably be expected. The temperature only came down as far as 11 degrees yet the pressures seemed reasonable I.e not running in a vac or any signs of possible blockage etc, the condenser is clear and both condenser fans are running.... also both internal fans are running yet the compressor is ridiculously hot. After around a hour to hour and half the compressor temperature got up to 94 degrees, I know compressors on some bottle coolers can run a little warmer than other systems but not as hot as this is. I checked electrics on it and everything seems good but was suspecting perhaps it isn't pumping as efficiently as it should be and just generating huge amounts of heat.
Any ideas what could be causing it, and best method of checking pump quality? I thought about removing charge and running it with nothing in to see how low of a vac it can pull but not sire what would be a good result, should it be strong enough to pull my gauges into complete vac as low as they will go and if not then that's the issue?
Don't really want to condemn it if it isn't faulty but I can't see what else it could be....I've only had one compressor that's needed pump testing before and that had rotarlock valves on so could do it with charge in system and when tested it barely moved.