Test Run - Mitsubishi Heavy Industries SRK25GZ-L1 Handbook

Additional refrigerant charge
When refrigerant piping exceeds 7.5m conduct additional refrigerant charge after refrigerant sweeping.
Max. 10m
10m over 15m
*In case of cooling only unit charge amount is 10g/m
[Example for heat pump units]
How much amount of additional charge for 10m piping?
(10 – 7.5)m × 20g/m = 50g 50g for additional charge
How much amount of additional charge for 15m piping?
(10 – 7.5)m × 20g/m + (15 – 10)m × 30g/m = 200g 200g for additional charge
(4) Insulation of connecting portion
1) Cover the connection portion of the refrigerant piping with
the pipe cover and seal them.
If neglecting to do so, moisture occurs on the piping and
water will drip out.
2) Finishing and fixing
a) Tie up the piping with wrapping tape, and shape it so
that it conforms to which the pipe is attached.
b) Fix them with clamps as right figure.

2.5.5 Test run

(1) Conduct trial run after confirming that there is no gas leaks.
(2) When conducting trial run set the remote controller thermostat to continuous operation position. However when the power source
is cut off or when the unit's operation switch is turned off or was turned to fan operation position, the unit will not go into operation
in order to protect the compressor.
(3) Insert in electric plug into the electric outlet and make sure that it is not loose.
(a) When there is something wrong with the electric outlet and if the insertion of the electric plug is insufficient, there may occur
a burn out.
(b) It is very important to be careful of above when pulgging in the unit to an already furnished electrical outlet.
(4) Explain to the customer on the correct usage of the air conditioner in simple layman's terms.
(5) Make sure that drain flows properly.
(6) Standard operation data
(a) Heat pump type
Item
High pressure MPa(kgf/cm
Low pressure MPa(kgf/cm
Temp. difference between suction
air and discharge air (˚C)
Running current (A)
Additional charge amount per meter = 20g/m*
Additional charge amount per meter = 30g/m
Model
Cooling
2
)
Heating
Cooling
2 )
Heating
Cooling
Heating
Cooling
Heating
To cover the connecting portion with
insulation materials, cut upper portion and
Vinyl tape
then seal it with insulation materials.
Insulation
Refrigerant piping
Electrical wiring
Covering tape
Drain hose
Tapping screw
SRK328HENF-L2
–
1.67~1.86 (17 ~ 19)
0.44 ~ 0.54 (4.5 ~ 5.5)
–
12 ~ 16
18 ~ 22
6.9/6.9
6.1/6.1
SRK-H
Cover the exterior portion with
covering tape and shape the piping
so it will match the contours of the
route that the piping to take. Also
fix the wiring and pipings to the
wall with clamps.
(220/240V)
SRK408HENF-L2
–
1.76 ~ 1.96 (18 ~ 20)
0.39 ~0.49 (4.0 ~ 5.0)
–
12 ~ 16
18 ~ 22
6.4/6.4
6.5/6.5
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