132
Trial operation
Procedure and summary of trial operation
Outline of procedure
For a trial operation, follow the procedure below:
Check the basic items, especially installation work. Ensure you write the
Check before trial operation
check lists 1 and 2
.
Implementation of trial operation check
Implement check in sequence according to each flowchart of trial operation
procedure.
(In case of abnormal operation in trial operation)
Refer to Troubleshooting to clear the error, and then implement the trial
Clear the error
operation again.
End
* Ensure you write the check results of trial operation in the check lists 1 and 2. It will be an important document for
servicing or maintenance in the future.
Check before trial operation
Prior to the trial operation, confirm whether there is a fault with the installation work using “Check list 1”.
CHECK LIST 1
Is the capacity of field fuse adequate?
Outdoor unit
A
Indoor unit
A
Is the diameter of power source cable correct?
Outdoor unit
mm
2
Indoor unit
mm
2
Is the control transmission line correct?
(Indoor/outdoor connecting terminal: PQ, Type: Shield wire)
Cable diameter
mm
2
Is the power of indoor units collectively supplied?
Is the earth grounded?
Is the insulation good?
(10 M
Ω
or more )
M
Ω
or more
Is the voltage good?
(Within 380/400/415 ± 10%)
V for outdoor unit
Is the connecting cable diameter correct?
Is the branching kit correct?
Is the drain water flow sufficient?
(Indoor unit)
Is the heat insulation of cables good?
(Connecting cables, branching kits)
Is there no short-circuit of discharge air of indoor/outdoor units?
Are vacuuming and addition of refrigerant performed after airtight test of refrigerant piping?
Are the valves fully opened?
Gas side
Liquid side
Balance side
Check additional amount of refrigerant
CHECK LIST 2
•
Calculate the additional amount of refrigerant from the pipe dia. at liquid side and length of pipe to be connected. Write
the total length of the liquid side pipes for each dia. in the following table, and calculate the additional amount of
refrigerant. (The refrigerant amount charged in the outdoor unit is only for the outdoor unit, and refrigerant for piping is
not included.)
Pipe diameter at liquid side (mm)
Standard refrigerant amount (kg/m) Total length of liquid side pipes (m) Additional refrigerant amount for each liquid pipe
∅
6.4
0.030
X
=
kg
∅
9.5
0.065
X
=
kg
∅
12.7
0.115
X
=
kg
∅
15.9
0.190
X
=
kg
∅
19.0
0.290
X
=
kg
∅
22.2
0.420
X
=
kg
Additional refrigerant amount
kg
[
]
[
]
[
]
18
Summary of Contents for A90-0132
Page 2: ...2 ...
Page 4: ...4 ...
Page 174: ......
Page 175: ......
Page 176: ...www toshiba aircon co uk MADE IN UK A90 0132 Revised June 2002 ...
