refrigerated drinking fountain

[regigoz]

Hello,
I have been trying to fine tune a refrigerated 8 gph drinking fountain to meet the ARI standard and increase efficiency. The compressor specs are
R134a
Capacity
W ±7% 843

kcal/h ±7% 725
Btu/h ±7% 2883
The Evap coil is a coil on coil tankless type and has proven it can meet the capacity requirements for ARI with 4.25 oz charge. The standard calls for 8gph at these conditions Ambient 90 water inlet 80 water outlet 50. The HS pressure is the issue 240-280 psi. I thought it could have non condensables or moisture so I revacuated for 4 hrs down to 125 microns, it held. Ran it again, no change in the pressure. Thought maybe there was restriction at the expansion point (drier cap tube type) so I changed both, reevacuated successfully, recharged, ran it and still no change in the pressure. It was suggested to cut the cap tube length 6" and try again. Went through all steps again and re ran still no change. Cut six more 6" off at the request of my boss. Still no change in pressure but the flow dropped down to 6 gph. The system temps and subcooling and superheat all seem good, but he keeps saying the pressure is to high. I can not get why it is to high out of him. Can it be the compressor is low quality and just doesn't perform like a danfoss (our standard compressor)?I am suspicious that the vacuum pump is not working as it should. Can there still be moisture in the system even after a 4 hr evac to 125 microns? Could it be the wrong oil type for the pump? Is it ok to liquid charge at the compressor service port? I am no expert and my boss is not either but thinks he knows everything:confused: which makes it pretty hard to tune this unit. Any advice would be appreciated.

[mad fridgie]

You have not given enough detail.
But yes your discharge pressure does seem high.
Reduce your refrigeration charge, as a starting point

[regigoz]

What further details are needed? I would be happy to post them.

[Brian_UK]

Please also try to use standard text formatting, I find your post hard to read.

Mind you, it could be my age. ;)

[mad fridgie]

What further details are needed? I would be happy to post them.
Discharge pressure, discharge temp
Liquid pressure, liquid temp
Pressure at evap inlet, temp at evap inlet
Pressure at evap outlet, temp at evap outlet
Pressure at comp inlet, temp at comp inlet
How does the water flow?
How is the condenser cooled (with a fan or static)
In metric would be nice!!!

[regigoz]

Here is the additional information. The locations listed below are thermocoupled and the thermocouples are connected to a data logger. The pressure readings are guage readings and their locations are: LS on comp suction line 6" before compressor, HS in btwn comp out and cond in approx 6" from the compressor. The water supply is connected to the top of the evap coil out through the bottom to a push button valve, then out to the bubbler(outlet) The refrigeration goes from the fan cooled condenser, through the drier, then cap tube to the bottom of the evap coil and out to the the top of the evap coil to the compressor. The evap coil is a coil on coil type in a helix, there is no tank to store water.
The copper tubing is 1/2" od(12.7mm) for the water and 5/16"(7.5mm) for the refrigeration(only on the coil) The rest of the refrigeration tubing is 1/4"(6.35mm).
<TABLE style="WIDTH: 614pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=818 x:str><COLGROUP><COL style="WIDTH: 55pt; mso-width-source: userset; mso-width-alt: 2669" width=73><COL style="WIDTH: 56pt; mso-width-source: userset; mso-width-alt: 2742" width=75><COL style="WIDTH: 52pt; mso-width-source: userset; mso-width-alt: 2523" width=69><COL style="WIDTH: 57pt; mso-width-source: userset; mso-width-alt: 2779" width=76><COL style="WIDTH: 52pt; mso-width-source: userset; mso-width-alt: 2523" width=69><COL style="WIDTH: 54pt; mso-width-source: userset; mso-width-alt: 2633" width=72><COL style="WIDTH: 48pt" span=6 width=64><TBODY><TR style="HEIGHT: 26.25pt" height=35><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; WIDTH: 55pt; HEIGHT: 26.25pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl24 height=35 width=73>BUBBLER OUTLET</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 56pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl25 width=75>AMBIENT</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 52pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl24 width=69>INLET SUPPLY</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 57pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl25 width=76>COMP IN</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 52pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl24 width=69>COMP OUT</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 54pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl25 width=72>EVAP IN</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl24 width=64>EVAP OUT</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl25 width=64>COND IN</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl24 width=64>COND OUT</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl31 width=64>DRIER</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid" class=xl29 width=64>CAP TUBE</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid" class=xl29 width=64>COMP CASE</TD></TR><TR style="HEIGHT: 13.5pt" height=18><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; HEIGHT: 13.5pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl26 height=18>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl26>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl26>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl26>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl26>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl26>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl26>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl26>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl26>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl30 width=64>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl30 width=64>F</TD><TD style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl30 width=64>F</TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; HEIGHT: 12.75pt; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 height=17 x:num>50/ 10</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>91/ 32.7</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>79/ 26.1</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>57/ 13.8</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>178/81.1</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>47/8.3</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>51/10.5</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>154/67.7</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>138/58.8</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>139/59.4</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>136/57.7</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: windowtext; BORDER-RIGHT: windowtext 1pt solid" class=xl27 x:num>141/60.5</TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; HEIGHT: 12.75pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 height=17 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext 1pt solid; BACKGROUND-COLOR: transparent; HEIGHT: 12.75pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 height=17 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: windowtext; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: windowtext 1pt solid" class=xl28 x:num></TD></TR></TBODY></TABLE>
<TABLE style="WIDTH: 633pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=844 x:str><COLGROUP><COL style="WIDTH: 59pt; mso-width-source: userset; mso-width-alt: 2889" width=79><COL style="WIDTH: 56pt; mso-width-source: userset; mso-width-alt: 2742" width=75><COL style="WIDTH: 55pt; mso-width-source: userset; mso-width-alt: 2669" width=73><COL style="WIDTH: 56pt; mso-width-source: userset; mso-width-alt: 2742" width=75><COL style="WIDTH: 52pt; mso-width-source: userset; mso-width-alt: 2523" width=69><COL style="WIDTH: 57pt; mso-width-source: userset; mso-width-alt: 2779" width=76><COL style="WIDTH: 52pt; mso-width-source: userset; mso-width-alt: 2523" width=69><COL style="WIDTH: 54pt; mso-width-source: userset; mso-width-alt: 2633" width=72><COL style="WIDTH: 48pt" span=4 width=64><TBODY><TR style="HEIGHT: 13.5pt" height=18><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; WIDTH: 170pt; HEIGHT: 13.5pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff; mso-ignore: colspan" class=xl31 height=18 width=227 colSpan=3> 12 inches removed from cap tube</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; WIDTH: 56pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" width=75></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; WIDTH: 52pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" width=69></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; WIDTH: 57pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" width=76></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; WIDTH: 52pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" width=69></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; WIDTH: 198pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff; mso-ignore: colspan" class=xl26 width=264 colSpan=4>Cap Tube: .042 id 4 ft long including drier</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; WIDTH: 48pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: #e6e6ff" class=xl29 width=64> </TD></TR><TR style="HEIGHT: 13.5pt" height=18><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; HEIGHT: 13.5pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff; mso-ignore: colspan" class=xl24 height=18 colSpan=2>Flow: 6.73 gph</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl25></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl24>CHARGE: </TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl25 align=right x:num>4.25</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"> OZ</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff; mso-ignore: colspan" class=xl26 colSpan=2>Fan Motor: 5W</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl27></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl30></TD></TR><TR style="HEIGHT: 13.5pt" height=18><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; HEIGHT: 13.5pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff; mso-ignore: colspan" class=xl24 height=18 colSpan=2>HIGH SIDE PRESS </TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl25>250 PSI/17.5 kilogramcm2</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff; mso-ignore: colspan" class=xl28 colSpan=2 x:str="COMPRESSOR: ">COMPRESSOR: </TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff">Tatung</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl24></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff; mso-ignore: colspan" class=xl26 colSpan=2>Fan blade: 30" pitch</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl27></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl30></TD></TR><TR style="HEIGHT: 13.5pt" height=18><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; HEIGHT: 13.5pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff; mso-ignore: colspan" class=xl24 height=18 colSpan=2>LOW SIDE PRESSURE:</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl25>35 psi/2.4kgcm2</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl25> 5.22 A</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl25></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl27></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl30></TD></TR><TR style="HEIGHT: 12.75pt" height=17><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; HEIGHT: 12.75pt; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff; mso-ignore: colspan" class=xl24 height=17 colSpan=3>WATER LINE PRESSURE: 35 PSI</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl28>122 V</TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl25></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff"></TD><TD style="BORDER-BOTTOM: #e6e6ff; BORDER-LEFT: #e6e6ff; BACKGROUND-COLOR: transparent; BORDER-TOP: #e6e6ff; BORDER-RIGHT: #e6e6ff" class=xl30></TD></TR></TBODY></TABLE>These test results were after cutting 12" (304mm) off the cap tube to reduce the head pressure, but the only thing that was reduced was the water flow(was at 8.47 gph(32.06lph) with a 280psi(19.68kgcm2) head pressure). This compressor we are testing is in three different units and the high head pressure is showing on all three. I'm at a loss on how to get the pressure down without losing anything else. Tried using less charge 4 oz, 4.25 oz, but then I lose the 50F-55F evap out, the 70-90F comp in, and the 130F condenser out. The water flow output changes as well.

[mad fridgie]

without actually feeling the unit (which is very important), the data given indicates that the condenser is to small or not enough airflow or airflow is re-cycling

[mad fridgie]

Reason
little subcooling (showing condenser is not flooded)
Little superheat showing that the evap is flooded with liquid.
High suction pressure.
Do you have a cowl around the condenser fan (air flow problem)

[regigoz]

I suspected the air flow to be insufficient. I am going to try a better fan.