MXZ-SM42NAMHZ Service Manual

15
OCH789
14
How to determine the capacity when greater than 100% indoor model size units are connected in total:
No
Yes
Temporarily select the indoor/outdoor units
Reselect the outdoor units
Reselect the indoor units
Reselect the outdoor units
Reselect the indoor units
Indoor Unit
n
Total Indoor Units Capacity (CT
i
) = ∑ (Individual Rated Indoor Unit Capacity CT
ik
×
k=1
Individual Indoor Temperature Correction Coef. α
k
) (Figure 1, 4)
Outdoor Unit
*1
Maximum Capacity(CT
max
) = CT
o
Yes
Want to change to smaller
indoor units?
Does it fulfill the load of
each room?
CT
o
≤ CT
i
L ≤ CT
o
Maximum Capacity(CT
max
) = CT
i
L ≤ CT
i
Need to select smaller
outdoor unit?
Does it fulfill the load of
each room?
Rated Outdoor Unit Capacity
< Total Indoor Units Capacity
Outdoor Unit Input
= Rated Outdoor Unit Input ×
Outdoor Temperature
Correction
Coef.
× (CT
i
)
Determine the load (L) and
the Indoor/Outdoor Temperature
n: Total Number of Indoor Units
k: Indoor Unit Number
Yes
Yes
No
No
No
No
Yes
No
No
No
Yes
Yes
Yes
Average Indoor temp. power input Coef. (
c
ave
)
= ∑ {c
k
× (M
k
/ ∑ M
k
)}
n
k=1
n
k=1
The purpose of this flow chart is to select the indoor and outdoor units. For other purposes, this flow chart is intended only for reference.
*c
k
: Outdoor unit power input coefficient of k indoor unit room temp. (Refer to 4-2.)
*M
k
: Number part of the k indoor unit model (e.g. P80 → 80)
Average Indoor temp. power input Coef. ( c
ave
)
c
ave
= ∑ {c
k
× (M
k
/ ∑ M
k
)}
n
k=1
n
k=1
Outdoor Unit Input =Rated Outdoor Unit Input × c
ave
Outdoor Unit Input = Rated Outdoor Unit Input × c
ave
× (CT
i
)
∑ (CT
im
× α
m
)
n
m=1
Individual Indoor Unit Capacity: CT'
ik
= CT
max
×
CT
ik
× α
k
Completed Selecting Units
Completed Selecting Units
(x) is the approximate correction function when greater
than 100% model size units are connected.
(x) refers to STANDARD CAPACITY DIAGRAM.
Outdoor Unit Capacity (CT
o
) = Rated Outdoor Unit Capacity × ( )
× Outdoor Temperature Correction Coef. (Figure 2, 5)
× Piping Length Correction Coef. (Figure 3, 6) × Defrost Correction Coef. (in heating, Table 1)
(x) is the approximate correction function when greater than 100%
model size units are input as connected.
(x) is the approximate correction function when less than or equal
100% model size units are input as connected.
CT
i
× (CT
i
)
Input
Calculation