Check The Additional Amount Of Refrigerant; Additional Amount Of Refrigerant By Pipe Length; According To Indoor Unit Horsepower; Additional Amount Of Refrigerant - Toshiba MMY-MAP0806HT8P Service Manual

• Check the additional amount of refrigerant.

Checklist 2
Calculate the additional amount of refrigerant from the additional amount of refrigerant (A) by the pipe diameter on
the liquid side, the pipe length to be connected, and the corrective amount of refrigerant (B) according to Indoor
unit horsepower, and the corrective amount of refrigerant (C) according to system horsepower.
Additional amount Actual liquid pipe length × Additional amount
=
of refrigerant
First, enter the total length for each liquid pipe diameter in the following table, and then calculate the additional
amount of refrigerant by pipe length.
<Additional amount of refrigerant by pipe length>
Pipe diameter on the liquid
side
φ6.4
0.025 × 1.2 ×
φ9.5 0.055 × 1.2 ×
φ12.7 0.105 × 1.2 ×
φ15.9 0.160 × 1.2 ×
φ19.0
0.250 × 1.2 ×
φ22.2
0.350 × 1.2 ×
Next, refer to the following table for the corrective amount of refrigerant (B) according to indoor unit horsepower.
according to indoor unit horsepower>
Additional refrigerant charge amount Indoor unit
Additional refrigerant charge amount
Capacity of Indoor unit
Corrective amount of refrigerant
Next, refer to the Table 1-1~1-5 on P. 20 "Adding refrigerant" for the corrective amount of refrigerant (C) according to system horsepower.
Lastly, add the additional amount of refrigerant by pipe length (A) and the corrective amount of refrigerant by indoor unit horsepower (B)
to the corrective amount of refrigerant by combined horsepower (C). This is the final additional amount of refrigerant.
If a minus sign is indicated as the result, do not reduce or add the refrigerant (= 0 kg).
<Additional amount of refrigerant>
Additional amount of refrigerant by pipe length (A) kg
Corrective amount of refrigerant according to indoor unit horsepower (B) kg
Corrective amount of refrigerant according to combined horsepower (C) kg
Additional amount of refrigerant kg
of refrigerant per 1 m of liquid pipe
(A)
Corrective amount of refrigerant
+

according to indoor unit horsepower

(B)
Standard amount of Total pipe length on each liquid side
refrigerant
Standard Indoor
kg/HP
HP
kg
Corrective amount of refrigerant
+
according to system horsepower
Additional amount of refrigerant pipe diameter on
each liquid side
m
=
=
=
=
=
=
Fresh Air intake
unit Indoor unit
0.4 0.2
HP
kg
kg
kg
kg
kg
− 110 −
(C)
kg
kg
kg
kg
kg
kg
kg
Air to Air Heat Exchanger
with DX-coil
0.2
HP HP
kg kg