Drain Piping Work; Refrigerant Charge - Mitsubishi FDTN208HEN-S Instruction Manual

(d) Refrigerant charge
1) Outdoor unit is pre-charged R-22 refrigerant at a factory as shown in Table 1.
2) Indoor unit is pre-charged only a small amount of nitrogen gas for prevention of the air entry.
3) Additional charge on site is required when the pipe length is longer than that of restricted value (Which is varied wirh the
type of Indoor unit) as shown in Table 1.
Table 1
Item
Model
FDC208H type
FDC258H type
FDC308H type
FDC408H type
FDC508H type
FDC208C type
FDC258CEN3
FDC258CEP3
Note (1) *3. The values in ( ) are when connected to FDKN Series indoor unit.
1 Additional charge amount
¡ Calculate the additional charge amount according to Table 1.
Example : In the case that FDTN508HES-S is newly installed with piping length of 40m.
(30 – 5) (m) × 0.035 (kg/m) + (40 – 30) (m) × 0.02 (kg/m)= 1.075 (kg)
¡ In the case of recharge the refrigerant for service, calculate the proper amount of refrigerant depending on the piping length on
site.
Example : In the case that FDTN508HES-S with piping length of 15m is fully recharged in service.
1.9 (kg) + (15 – 5) (m) × 0.035 (kg/m)= 2.25 (kg)
Factory charge amount for FDC508HES3.

(4) Drain piping work

¡ Execute the drain piping by using field purchased parts of pipe, elbow, and grommets, if the drainage work is needed.
Drain elbow (1 pc.)
Hard vinyl chloride pipe for
general purpose (VP-16)
Additional charge amount
Factory charge amount
(kg)
0.98
1.10
1.40
1.67
0.035
1.90
0.90
1.05
1.13
0 m
2
Outdoor Unit
Total length of the piping (one way).
When piping length is 30m or less, additional charge amount per 1m.
Length that additional charge is not required.
Additional charge amount per 1m.
Length that additional charge is not required.
Total length of the piping (one way).
Drain grommet
(2 pcs.)
Pipe length that
1 (kg/m)
additional charge is not
required (m)
0 ~30m 30 ~ 50m
0.015 – 0 (5) *3
–
0.025
0.02
2
0.015 0 (5) *3
–
0.025
30 m
50 m
0.02kg/m
Indoor Unit
Additional charge amount.
When piping length is more than 30m,
additional charge amount per 1m.
Recharge amount.
™ There are 3 holes (ø 20) on the bottom plate of Outdoor
unit for draining condensed water.
™ To guide the condensed water to the gutter it is necessary
to install the unit on the flat base or blocks.
™ Connect the drain elbow as shown in the illustration and
close other holes with grommets.
FDTN-H
Maximum piping
length (m)
30
5
50
30
5
265