r404a

[mcunliffe4]

went to look at a LTcoldroom 2nite. Replced tev, orifice and drier, on start up coldroom at +11 on departure -1 blew cond coil through with ofn, all fan motors working, back pressure at 45ps head pressure 300psi, evap coil probe temp -10, was wandering if this sounded about right, ambient temp aprox +24c and coldroom fullyloaded , on arrival coldroom reading +6c and stock starting to thaw. Had to leave site when coldroom at -1c due to owner wanting to get to a meeting, was wandering weather head pressure to high. thanks guys any help would be great

[taz24]

went to look at a LTcoldroom 2nite. Replced tev, orifice and drier, on start up coldroom at +11 on departure -1 blew cond coil through with ofn, all fan motors working, back pressure at 45ps head pressure 300psi, evap coil probe temp -10, was wandering if this sounded about right, ambient temp aprox +24c and coldroom fullyloaded , on arrival coldroom reading +6c and stock starting to thaw. Had to leave site when coldroom at -1c due to owner wanting to get to a meeting, was wandering weather head pressure to high. thanks guys any help would be great

300psi is about 20 b and that is about 45deg c.

Doing all that work in that ambient, seems about right to me.

It is as high as it wants to get because I bet the hp will be set to about 22b.

taz.

[lowcool]

yeah mate the high heatload will make for a slow pull down and higher condensing pressures,id be shopping elsewhere for a month or so

[Andy W]

It will take a while to pull down.

I hope they sorted out what cant be re frozen like ice cream, fish, poultry .....

[mcunliffe4]

thanks guys will ring this orning and see what temp it has reached

[coolhibby1875]

i would say that this is a bit high even more so the suction presure especially if you blew condenser and all the fans are running did you vac out the system prior to opening up system?

[mcunliffe4]

colhibby, thanks for the reply, i pumped down prior to valve/drier change so purged refrigerant through suction.