80
Next, refer to the following table for the corrective amount of refrigerant (B) by system capacity.
(Table 2) Compensation by outdoor HP
• Check the additional amount of refrigerant.
Check list 1
• Using the “Check list 1”, check there is no trouble in the installation work.
Is capacity of the leak breaker appropriate?
Outdoor total capacity
XXXX
A
Indoor unit
XXXX
A
Is the diameter of the power cable correctly wired?
Outdoor unit (A)
XXXX
mm²
Indoor unit
XXXX
mm²
Is the control communication line correctly wired?
Indoor –outdoor connection terminals (U1, U2)
XXXX
Central control system connection terminals (U3, U4)
XXXX
Is the power of the indoor units supplied collectively?
Is the earth grounded
Is the insulation good? (10M
Ω
or more)
XXXX
M
Ω
or more
Is the main power voltage correct? ( ± 10%)
XXXX
V
Is the diameter of the connecting pipe correct?
Is the branch kit correct?
Does the indoor unit condensate drain adequately?
Is the thermal insulation of pipes good? (Connecting pipes, Branch kit)
For both indoor and outdoor units, ensure air is not short-circuited from discharge to inlet ports.
After pressure test, check that the pipework and indoor units have been vacuumed and the correct amount of additional gas has been charged.
Are valves of all the outdoor units fully opened?
Gas side
Liquid side
outdoor unit (A)
XXXX
XXXX
Check list 2
Calculate the additional amount of refrigerant from the following:
Pipe dia at
liquid side
Ø6.4
Ø9.5
Standard amount of refrigerant
kg/m
0.025 ×
0.055 ×
Total pipe length at each liquid side
=
=
Additional amount of refrigerant by pipe
length (A)
Additional amount of refrigerant pipe
dia at each liquid side kg
kg
kg
kg
Outdoor unit capacity type
0401 type
0501 type
0601 type
Compensation by outdoor HP kg
–0.8
–0.4
0
Finally add the additional amount of refrigerant by pipe length (A) to the corrective amount of refrigerant by
system capacity (B). This is the final additional amount of refrigerant.
If the result is indicated as a negative, do not add any refrigerant. Do not add the refrigerant (= 0kg).
Additional refrigerant charge amount at site (R)
Additional amount of refrigerant by pipe length
(Table 1)
Compensation by outdoor HP
(Table 2)
Additional amount of refrigerant
(R)
kg
kg
kg
Additional
refrigerant charge
amount at site
R
(kg)
Real length
of liquid pipe
=
×
+
Additional refrigerant charge
amount per liquid pipe 1m
(Table 1)
Compensation
by outdoor HP
(Table 2)
Firstly enter the total length for each liquid pipe in the following table and then calculate the additional amount of
refrigerant by pipe length.
(Table 1) Additional amount of refrigerant by pipe length
