Carrier 19xr problem

[-AL-]

Hi all,

I have a problem with Carrier Chiller 19xr5052cq3771. Chiller was stopped 6 months, when i switch power on comes alarm (Potential freez-up, evap press/temp too low). What i must to do?

[james10]

chech gas charge/ check if the refrigerant has migrated to the condensor. open all valves and operate heaters check the calibration of the transducers (you can calibrate them using the pic 2 controller)

[-AL-]

I checked condenser (started sw pump, no ***** level presented). How i can check ***** level in evaporator? Al transducers calibrated. Main display shows evaporator temp. -24,5 c and condenser temp. -24,9 c. How is that possible?

[bigor_2]

check water flow!

[james10]

To check refrigerant level in the evaporator.
1.Pull the Gas
2.Attach a gauge line to the bottom of the evaporator and one at the top with an inline sight glass inbetween purge the air from the lines then raise and lower the sight glass this will indicate the liquid refrigerant level in the system.
giving by your temperatures are your refering to water or refrigerant temps
at -25 degreees C R134a is at 20kpa(0.3PSIG). If the transducers are correct sounds like theres no gas in the system

[goshen]

Hi all,

I have a problem with Carrier Chiller 19xr5052cq3771. Chiller was stopped 6 months, when i switch power on comes alarm (Potential freez-up, evap press/temp too low). What i must to do?

Hi i hope u didint blow your eprom memory ,this is a typical carrier problem if the unit sits with no powe for a few months this could happen and all u could do is call carrier ,in your case i hope you still have the memory so you should simply check all connections on controller side and then water side including pressure drop,and water filter if instaled .
good luck :D

[-AL-]

Hallo all,

adding HEAT_EX display information:

Chill water delta P 51,0 kPa
Entering chill.w. 11,8 C
Leaving chill.w 11,9 C
Chill.w delta T -0,2 C
Choll.w puppdown -0,1 C
Evap.refr. t -26 C
Evap. pressure 0,8 kPa
Evap. approach 38,3 C
Condens. w delta P 39,8 kPa
Entering Condens. w 8,7 C
Leaving Condens. w 8,5 C
Condenser refrig. t -24,5 C
Condenser pressure 8,3 kPa
Condenser Approach -32,4 C
Hot gas bypass ref. OFF
Surge/HGP active? NO
Active delta P 8,3 kPa
Active delta T 0,3 C
Surge/HGP delta T 0,3 C
Head pressure reference 10%

[Intercas]

Looks like no gas to me.

[goshen]

Hallo all,

adding HEAT_EX display information:

Chill water delta P 51,0 kPa
Entering chill.w. 11,8 C
Leaving chill.w 11,9 C
Chill.w delta T -0,2 C
Choll.w puppdown -0,1 C
Evap.refr. t -26 C
Evap. pressure 0,8 kPa
Evap. approach 38,3 C
Condens. w delta P 39,8 kPa
Entering Condens. w 8,7 C
Leaving Condens. w 8,5 C
Condenser refrig. t -24,5 C
Condenser pressure 8,3 kPa
Condenser Approach -32,4 C
Hot gas bypass ref. OFF
Surge/HGP active? NO
Active delta P 8,3 kPa
Active delta T 0,3 C
Surge/HGP delta T 0,3 C
Head pressure reference 10%

Hi it would seem like a shortage of rerigerant!:)

[james10]

chech gas charge/ check if the refrigerant has migrated to the condensor. open all valves and operate heaters check the calibration of the transducers (you can calibrate them using the pic 2 controller)
HELLO:rolleyes:

[serviceman]

valvual gauges placed on the refrigerant charge to check if you have coolant in the chiller

[sedgy]

is there a frost stat needs re-setting ?

[-AL-]

Problem solved. Just adding gas!!!!

[james10]

Problem solved. Just adding gas!!!!
Where was the leak? i presume you mean recharging and not simply adding gas to a leaking machine.
If these machines are allowed to run with a low gas charge the compressor surges and if this happens you can kiss goodbye to your high speed shaft, guide vanes and impellor best part of £30k for the parts alone.