Additional Refrigerant
The amount of refrigerant put into the outdoor unit at the factory is sufficient to fill up to 20m of
!
refrigerant pipework.
If the length of the refrigerant pipework is 20m or less, addition of refrigerant at the installation site
!
is unnecessary.
If the length of the pipework exceeds 20m, extra refrigerant must be added. Refer to the table
!
below for details of the extra amounts.
Overcharge or undercharge of refrigerant in the outdoor unit will cause malfunction of
!
the compressor.
The prescribed amount of the replenishment of the refrigerant is shown in the table below:
MODEL
(RAV-)
GB
134AH-PE
164AH-PE
264AH/AH8-PE
364AH8-PE
464AH8-PE
134A-PE
164A-PE
264A/A8-PE
364A8-PE
464A8-PE
Heat Insulation
Provide heat insulation on the refrigerant piping on both the liquid side and gas side separately,
!
and ensure that all joints in the insulation are vapour sealed.
Since the temperature of the piping on the gas side increases during heating operations, the heat
!
insulating material used must be able to withstand temperatures of more than 120
Use the pipe insulation supplied in the accessory pack to insulate the piping connecting section on
!
the indoor unit side.
Pressure Measurement
Connect the pressure gauge to the locations in the table below when measuring the pressure dur-
!
ing operation.
!
A gauge is required since check joints are used for the connecting sections.
Note: During cooling operation, the pressure in the packed valve on the liquid side reduces.
Tel: 01823 665660
Heronhill - for all your Toshiba requirements
R
Additional amount of refrigerant to add at
installation site (kg)
Less
Less
Less
Less
than
than
than
than
20m
25m
30m
35m
0.18
0.35
—
0.18
0.35
—
0.18
0.35
—
0.18
0.35
0.53
0.25
0.5
0.75
0.18
0.35
—
0.18
0.35
—
0.18
0.35
—
0.18
0.35
0.53
0.25
0.5
0.75
!
ADD ONLY R407C REFRIGERANT TO THESE UNITS
During cooling
Check joint in the outdoor unit
During heating
Gas side packed valve
P
EFRIGERANT
IPING
Recharge amount if unit is reclaimed
±
50g
Less
Less
Less
Less
Less
than
than
than
than
than
40m
45m
50m
5m
20m
—
—
—
0.79
1.05
—
—
—
0.94
1.2
—
—
—
1.64
1.9
0.7
0.88
1.05
2.44
2.7
1.0
1.25
1.5
3.13
3.5
—
—
—
0.79
1.05
—
—
—
0.94
1.2
—
—
—
1.64
1.9
0.7
0.88
1.05
2.44
2.7
1.0
1.25
1.5
3.13
3.5
High-pressure side
~ 28 ~
www.heronhill.co.uk
±
(kg)
50g
Less
Less
Less
Less
Less
than
than
than
than
than
25m
30m
35m
40m
45m
1.23
1.4
—
—
—
1.38
1.55
—
—
—
2.08
2.25
—
—
—
2.88
3.05
3.23
3.4
3.58
3.75
4.0
4.25
4.5
4.75
1.23
1.4
—
—
1.38
1.55
—
—
2.08
2.25
—
—
2.88
3.05
3.23
3.4
3.58
3.75
4.0
4.25
4.5
4.75
˚
C –
HEAT PUMP TYPES ONLY.
Low-pressure side
Gas side packed valve
Check joint in outdoor unit
Fax: 01823 665807
Less
than
50m
—
—
—
3.75
5.0
—
—
—
—
—
—
3.75
5.0