Hitachi RCUE210AG2 User Manual

SMGB0003 rev.0 - 11/2006
pag. 160
Maintenance
6.5. Check items in daily operation
6.5. Check items in daily operation
6.5. Check items in daily operation
Check items Check contents Result (write the value or X )
1
Check of around of chiller unit
Remove the obstacle
Good / NG
2
Pressure, quantity and quality of chilled (heating)
water
Check them while pouring water
Good / NG
3
Pipe of chilled (heating) water
Good / NG
4
Check of screws and bolts etc
Re-tighten those which are loosed
Tightened / No tightened
5
Re-tightening of electrical wiring terminal
Re-tighten all by driver
Tightened / No tightened
6
Leakage of water pipe
Confi rm it while pouring water
Yes / No
7
Dirtiness of air side heat exchanger
Clean it by pouring hot (40°C) water.
Done / No done
8
Clogging of drain pump
Confi rm it while pouring water
Yes / No
9
Cleaning of inside/outside of machine room
Done / No done
10
Compressor
Check valves, fl are parts,
welding parts etc.
Good / NG
11
Air side heat exchanger
Good / NG
12
Water side heat exchanger
Good / NG
13
Expansion valve
Good / NG
14
4 way valve (only cooled heat pump)
Good / NG
15
Solenoid valve
Good / NG
16
Stop valve
Good / NG
17
Strainer
Good / NG
18
Pipe, capillary tube
Good / NG
19
High pressure block switch
Good / NG
20
Cleaning of inside/outside of unit
Done / no done
21
Interphase voltage of compressor
More than 180V
Good / NG
22
Vibration and noise
Check compressor, fan, pipe etc.
Abnormal / Normal
23
Operation adjustment and automatic operation
mechanism
Check the activation of ON, OFF,
temperature adjustment
Good / NG
24
High pressure block switch
Check the activation value and setting
Check the activation value and setting
value.
Good / NG
25
Indication light
Good / NG
26
4 way valve (only cooled heat pump)
Check the state of switch from cooling
Check the state of switch from cooling
to heating and vice versa.
Good / NG
27
Solenoid valve
Good / NG
28
Instruction on operation method
Done / No done
29
Inlet temperature of chilled (heating) water
°C
30
Outlet temperature of chilled (heating) water
°C
31
Inlet DB(WB) temperature of air side heat
exchanger
°C ( °C)
32
Water fl ow of water side heat exchanger
m3/h
33
High pressure
MPa
34
Low pressure
MPa
35
Operation voltage
V
36
Operation current
A
6.6. Caution on handling of R407C
6.6. Caution on handling of R407C
6.6. Caution on handling of R407C
6.6.1. Refrigerant
The refrigerant is HFC type refrigerant whose ozone destruction coeffi cient is ZERO. If other refrigerant is
mixed, the property of refrigerant is changed and may cause a problem. The following points should be taken
into account on its handling.
Refrigerant should be added in liquid state not in gas state. R407C is nonazeotropic refrigerant mixture,
and compositions of boiling point are different. Therefore, if it is added in gas state, refrigerant, easy to
evaporate, is added and refrigerant, hard to evaporate, remains in a refrigerant tank.
Confi rm if the tanks specialised for R407C.
The tank should be set so that refrigerant can be added in gas state.
The valves or hose for charge should be specialised for R407C.
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Hitachi RCUE210AG2 Specifications

General

Brand	Hitachi
Model	RCUE210AG2
Category	Chiller
Language	English