Refrigerant piping works
Draining form
In a standard condition, drain installation is not required
In a high humidity condition, drain installation is required
High humidity condition: Indoor temperature of 30°C, relative humidity of 85% within MCU installation space
Without the drain pump
1. Install horizontal drain pipe with a slope of 1/100 or more and fix it by hanger space of 1.0~1.5m (3.28~4.92')
2. Install U-trap at the end of the drain pipe to prevent a nasty smell to reach the indoor unit.
3. Install U-trap at the end of the drain pipe to prevent a nasty smell to reach the indoor unit.
Flexible hose
Wiring works
Installing the circuit breaker and wires
Power supply
MCCB
Max : 242V
X A
Min : 198V
Decide the capacity of ELB and MCCB by below formula.
The capacity of ELB, MCCB X[A] = 1.25 X 1.1 X ∑Ai
❈
X : The capacity of ELB, MCCB
❈
∑Ai : Sum of Rating currents of each indoor unit.
❈
Refer to each installation manual about the rating current of indoor unit.
Decide the power cable specification and maximum length within 10% power drop among indoor units.
n
(
∑
k=1
Coef: 1.55
L
: Distance among each indoor unit[m], Ak: Power cable specification[mm
K
i
: Running current of each unit[A]
K
DVM Hydro unit HT should use a separated power cable . Do not divide power cable from MCU to Hydro unit HT, MCU may be damaged.
1.0~1.5m
(3.28~4.92')
Ceiling
Horizontal drainpipe more than 1/100 slope
ELB
Power cable
X A, 30mmA
0.0039inch
2
0.0039inch
(2.5mm
2
)
0.1 sec
Coef×35.6×L
×i
K
K
) <
1000×A
K
Hanger
Earth cable
Communication cable
2
0.0012~0.0023inch
(2.5mm
2
)
(0.75~1.5mm
10% of input voltage[V]
2
]
2
2
)
13
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