Mitsubishi Electric Smart Multi MXZ-SM36NAM-U1 Data Book page 19

Air conditioning systems
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7. CAPACITY TABLES
<Heating>
(1) Rated power input of outdoor unit
(2) Calculation of the average indoor temperature power input coefficient
Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp. 26.6°F [ 3°C] W.B., Indoor temp. 70°F [21.1°C] D.B.)
Coefficient of the outdoor unit for indoor unit 2 (Outdoor temp. 26.6°F [ 3°C] W.B., Indoor temp. 78.8°F [26°C] D.B.)
Average indoor temp. power input coefficient (
Correction Coefficient of Indoor temperature = 1.16 × 15/(15 + 18) + 1.09 × 18/(15 + 18)
(3) Coefficient of the partial load (CTi)
Total indoor units capacity
15 + 18 = 33, thus,
(CTi) = 0.9 (Refer to the tables in "7-3. Correction by total indoor".)
(4) Outdoor power input (PIo)
Maximum System Capacity (CTx) = Total Indoor unit Capacity (CTi), so use the following formula
PIo = Outdoor unit Heating Rated Power Input × Correction Coefficient of Indoor temperature × (CTi)
= 3.02 × 1.12 × 0.9
= 3.04 kW
M-P0855
3.02 kW
n
c
)
×
ave
k
k=1
n: Total number of the indoor units
k: Number of the indoor unit
c
: Outdoor unit power input coefficient of k indoor unit room temp.
k
M
: Number part of the k indoor unit model (e.g. P80
k
= 1.12
1.16 (Refer to "7-2. CORRECTION BY TEMPERATURE".)
1.09 (Refer to "7-2. CORRECTION BY TEMPERATURE".)
n
(M
)}
k
k
k=1
80)
S-Series
17

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