Hitachi RAM-200FPS, Инструкция по установке и обслуживанию

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15
Model
The factory
refrigerant
charging
weight
(kg)
Additional
refrigerant
upper limit
(kg)
RAM-200FPS(D) 5.0
13.5
RAM-250FPS(D)
5.5
RAM-270FPS(D) 6.5
2 After locking work is completed, please implement air leakage test.
※
Note
：
1. The work that after use the flare nut to connect pipe and stop valve, will be effective.
2. Because check joints and flare nut can not connect, so please use the charging hoses. The spindle valve cap of stop
valve is removed, due to internal O-ring and thread will be opened, the voices caused by gas emitting, which has
nothing to do with the leakage.
3. Do not apply an abnormal big force to the spindle valve at the complete opening (5.0 N-m or smaller).
5) Insulate the unions and flare-nuts at the piping connections completely. Insulate the liquid piping and gas piping completely to avoid
decreasing of performance and dewing on the surface of the pipe.
6) In order to prevent rainwater invasion the unit, make sure to install the pipe cover, and installation thermal insulation material where
the pipe is through the unit, so that it can not have gaps happening.
5.3 Vacuum
1) Details stop valve operation, please refer to the attention of nameplate inside service cover description.
2) Connect a manifold gauge to the check joints at the both sides. Continue vacuum pumping work until the pressure reaches-0.1MPa
(-750mmHg) or lower for one to two hours.
3) After vacuum pumping work, stop the mani-fold valve
’s valve, stop the vacuum pump and leave it for one hour.
Check to ensure that
the pressure in the mani-fold gauge does not increase .
4) Because check joints and flare nut can not connect, so please use the charging hoses. After the work, please tighten the flare nut with
16N
• m of torque.
5) Check for any gas leakage at the flare nut connections, or brazed parts by gas leakage tester or foaming agent. The following is
recommended for foam testing fluid [Field-supplied (NUPRO "SNOPP" or Yokogawa & Co., Ltd.
”ｷｭﾎﾟﾌﾚッｸｽ”
)], component is not
clear which is general household cleaners do not use the liquid as a foam testing.
6) Vacuum drying determination example
：
※
Note
：
1. When remove the spindle valve cap of stop valve, there may be slight refrigerant leakage sound is normal.
2. Use tools and measuring instruments only for the new refrigerant (R410A) which directly touch refrigerant.
3. If vacuum degree of -0.1MPa (-750mmHg) is not available, it is considered that leakage exists. Check for any gas
leakage once again. If no leakage exists, operate the vacuum pump for one to two hours.
5.4 The Additional Refrigerant
1) Outdoor unit has been filled with refrigerant, but still based on the length of pipe filled with an appropriate amount of refrigerant. The
filling amount of refrigerant, please following the liquid piping length and the capacity of the indoor unit calculation, the results please fill
in " ".
Calculation formula
：
W
：
Additional refrigerant of liquid pipe (kg) = W11+W12+W13
W11
： Φ
12.7 liquid pipe length (m)
×
0.12(kg)=
W12
： Φ
9.53 liquid pipe length (m)
×
0.07(kg)=
W13
： Φ
6.35 liquid pipe length (m)
×
0.03(kg)=
W Total= (kg)
2) Fully open the gas line stop valve and slightly open the liquid line stop valve.
3) Cooling operation, then for charging refrigerant, connect the gauge manifold using
charging hoses with a refrigerant charging cylinder to the check joint of the liquid line
stop valve. (Refrigerant charging quantity of tolerance in the ± 0.1kg around.)
4) Fully open the liquid line stop valve after completing refrigerant charge.
5) Finally, please lock the spindle valve cap of liquid stop valve in according with the
following tightening torque.
The cap tightening torque
：
Liquid
20 N
．
m
Gas
49 N
．
m
additional refrigerant (kg)
•
Additional refrigerant W
exceeds the amount of
additional refrigerant filling
upper limit, adjust the length
of piping, such that W does
not exceed the value of upper
limit.
Please implement vacuum drying determination, to confirm whether water exists within the system. If moisture is present, Please
extend the vacuum time or installation the drying filter until no moisture is present within the system.
Be sure to do this work,
otherwise in the future the unit could easily lead to failure, and difficult to handle.
V
a
cu
u
m
D
e
g
re
e
Vacuum Time (min)
Vacuum Time and Vacuum Degree
Outside air temperature 23
℃
Vacuum pump stop
After the vacuum pump
stop, the vacuum degree
rebound phenomenon
V
a
cu
u
m
D
e
g
re
e
Vacuum Time (min)
The system includes water vacuum time and
vacuum degree
Outside air temperature 20
℃
System with water System without water
V
a
cu
u
m
D
e
g
re
e
Vacuum Time (min)
Figure3
：
Outside air temperature vacuum time
and vacuum degree
System with water,
outside air
temperature 20
℃
System with water,
outside air
temperature 10
℃
System without water, outside air
temperature do not affect
(