Toshiba Carrier MMY-MAP0726FT9P-UL Installation Manual page 16

■ Calculation of additional refrigerant charge amount
Additional refrigerant charge amount (lbs) = [1] + [2]
[1]. Compensation by capacity of outdoor unit (Table1)
[2]. (Actual length of liquid pipe × Additional refrigerant charge amount per liquid pipe 1 ft (Table2)) × 1.3
NOTE
If the additional refrigerant amount indicates minus as the result of calculation, use the air conditioner without
additional refrigerant.
(Table1) Compensation by capacity of outdoor unit
Outdoor unit Model name
capacity type (Standard Model)
072 type MMY-MAP0726FT9P-UL
096 type MMY-MAP0966FT9P-UL
120 type MMY-MAP1206FT9P-UL
144 type MMY-MAP1446FT9P-UL
168 type MMY-MAP1686FT9P-UL
192 type MMY-AP1926FT9P-UL
216 type MMY-AP2166FT9P-UL
240 type MMY-AP2406FT9P-UL
264 type MMY-AP2646FT9P-UL
288 type MMY-AP2886FT9P-UL
312 type MMY-AP3126FT9P-UL
336 type MMY-AP3366FT9P-UL
360 type MMY-AP3606FT9P-UL
384 type MMY-AP3846FT9P-UL
408 type MMY-AP4086FT9P-UL
432 type MMY-AP4326FT9P-UL
456 type MMY-AP4566FT9P-UL
Outdoor unit Model name
capacity type (Space Saving Model)
192 type MMY-AP192S6FT9P-UL
240 type MMY-AP240S6FT9P-UL
288 type MMY-AP288S6FT9P-UL
336 type MMY-AP336S6FT9P-UL
(Table2) Actual length of liquid pipe × Additional refrigerant charge amount per liquid pipe 1 ft
Liquid pipe outer diameter
Additional refrigerant amount
29-EN
Compensation by
capacity type outdoor unit
(lbs)
4.4
6.6
17.6
24.3
30.9
8.8
13.2
22.1
26.5
30.9
33.1
13.2
24.3
28.7
30.9
33.1
37.5
Compensation by
capacity type outdoor unit
(lbs)
8.8
22.1
30.9
37.5
(in) Ø1/4" Ø3/8" Ø1/2" Ø5/8" Ø3/4"
lbs/ft 0.017 0.037 0.071 0.108 0.168
– 15 –
Example:
120 type (MMY-MAP1206FT9P-UL)
L2
L1
L4
048 type
Pipe Liquid pipe size
L1 Ø1/2"
L2 Ø1/2"
L3 Ø3/8"
L4 Ø3/8"
L5 Ø3/8"
L6 Ø1/4"
L7 Ø1/4"
Additional refrigerant charge amount(lbs) = [1] + [2]
= 17.6 lbs + 5.798 lbs
= 23.40 lbs
[1]. Compensation by capacity of outdoor unit (Table1)
= Compensation by 120 type
= 17.6 lbs
[2]. (Actual length of liquid pipe × Additional refrigerant charge amount per liquid pipe 1 ft (Table2)) × 1.3
= (Lx × 0.017 lbs/ft + Ly × 0.037 lbs/ft + Lz × 0.071 lbs/ft) × 1.3
= ((L6+L7) × 0.017 lbs/ft + (L3+L4+L5) × 0.037 lbs/ft+(L1+L2) × 0.071 lbs/ft) × 1.3
= ((20 ft) × 0.017 lbs/ft + (25 ft) × 0.037 lbs/ft+(45 ft) × 0.071 lbs/ft) × 1.3
= (0.34 lbs + 0.925 lbs + 3.195 lbs) × 1.3
= (4.46 lbs ) × 1.3
= 5.798 lbs
Lx : Actual total length of liquid pipe Ø1/4" (ft)
Ly : Actual total length of liquid pipe Ø3/8" (ft)
Ø7/8"
Lz : Actual total length of liquid pipe Ø1/2" (ft)
0.235
L3
L5 L6 L7
036 type 018 type 015 type
Actual Piping length
30 ft
15 ft
10 ft
10 ft
5 ft
10 ft
10 ft
30-EN