monkey spanners
14-05-2023, 02:57 PM
Hi all,
Had a look at a 23 year old Climaventa chiller with a Hitachi screw compressor, air cooled condenser and shell and tube evaporator on R407C that cools a water loop for fan coils. Customer had been advised it was faulty and needed replacement, we turned it on and away it went cooling the loop down from 22C to 8C (ish)
Hour meter showing around 4500hrs which seems low given its age.
Anyway chillers not being my main area of expertise am after a bit of advice :confused:
With a water in temp of 12C, water out temp of 7.4C had an evaporating temp of -3.8C which seemed a bit low to me, is it too low? (water temps taken using chillers own sensors, evap temp from Testo gauges)
There is no service history for the system, have advised the plumber chaps to check and clean out any strainers in the water circuit, but am wondering if the evaporating temp is too low could this be due to flouling in the shell and tube thingy?
It was pulling around 47A per phase, data plate show a FLA of 123A so it wasn't working particularly hard at the time.
Cheers John
Had a look at a 23 year old Climaventa chiller with a Hitachi screw compressor, air cooled condenser and shell and tube evaporator on R407C that cools a water loop for fan coils. Customer had been advised it was faulty and needed replacement, we turned it on and away it went cooling the loop down from 22C to 8C (ish)
Hour meter showing around 4500hrs which seems low given its age.
Anyway chillers not being my main area of expertise am after a bit of advice :confused:
With a water in temp of 12C, water out temp of 7.4C had an evaporating temp of -3.8C which seemed a bit low to me, is it too low? (water temps taken using chillers own sensors, evap temp from Testo gauges)
There is no service history for the system, have advised the plumber chaps to check and clean out any strainers in the water circuit, but am wondering if the evaporating temp is too low could this be due to flouling in the shell and tube thingy?
It was pulling around 47A per phase, data plate show a FLA of 123A so it wasn't working particularly hard at the time.
Cheers John