Test Run Method And Check; Water System; Check Before Test Run - Hitachi RCUE40AG2 Service Manual

Test run
valve open
open
close
direction
liquid type
direction
water water water water water
state of
opening
Fig.3
pag. 22

2.1.4. Water System

Quality

control
Diameter of

water pipe
Water

temperature

2.2. Test run method and check

2.2.1. Check before Test Run

1. Need to apply electricity to oil heater. Power ON 12 hours before the fi rst
start up.
2. Screw compressor start-up. Confi rm if there is no strange noise or abnormal
vibration in 1~2 minutes after compressor operation.
3. Confi rmation of standard operating pressures. Stop the operation once and
re-start the unit after more than 3 minutes. Confi rm if pressure is correct after
15 minutes of compressor operation referring for "Fig.6 Standard operation
pressure" and "Fig.6 Water side heat exchanger washing area".
4. Positive revolution of fan. Confi rm if fan is spinning in counter clockwise
rotation observing the fan from the above.
5. Check of gas leakage.Confi rm if gas is not leaked after stopping the
operation.
SMGB0003 rev.0-01/2007
Confi rm if the water quality follows the guideline detailed in
−
the technical catalogue.
Strange noise or abnormal vibration can occur if water
−
pump is not installed well or water pipe is too long. Confi rm
the piping in the following sample method (fi g.3)
Open the inlet/outlet valve of water and pass the
−
water inside the water heat exchanger and pipes.
While operating the water pump, remove the air
−
inside the water pipe from the plug or automatic air-
removing valve.
Continue operating the pump and confi rm if there
−
is no water leakage, strange noise nor abnormal
vibration.
Remove the air from the pump and pass the water inside
−
all the system.
Check if water is not leaked in all the system.
−
Confi rm if the valve is open.
−
Confi rm if strainer (correspondent to 20 mesh) prepared
−
in local is installed in water inlet pipe near the unit. When
checking at the beginning of the season, check also if there
is any dust or foreign materials in strainer.
In case of short periods, there is no problem if water
−
temperature goes outside of service limits. However, chiller
unit may be damaged working for more then 30 minutes
out of standard specifi cations. Service limit of water
temperature is as follows.
Chilled water temperature (outlet): -10(option)~5~15°C
−
Warm water temperature (outlet): 35~55°C
−