Mitsubishi Heavy Industries FDCW100VNX, Technical Manual

Page: 33 / 173

Installation
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Setting max power, electric heater (R25 on AA22)
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(factory setting).
When the outdoor unit is in operation, maximum heater output
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When the outdoor unit is in operation, maximum heater output
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Max load
phase (A)* Max. electric
power
(Menu 8.3.2) Knob position Immersion
heater, out-
put (kW)
15 2 A 4.0
15 3 B 6.0
15 4 C (factory setting) 9.0
* Only applies to 3 phase connection.
Setting max boiler temperature (R26 on AA22)
The setting of the different maximum boiler temperatures is
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in Menu 9.3.1.
Knob position Boiler temperature
A 55
B 60
C (factory setting) 65
D 65
E 65
F 65
PCB, terminal and wiring diagram
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AA22-X1
AA22-X4
AA22-X2
AA22-R24
AA22-R25
AA22-R26
Connecting the outdoor air sensor
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the PCB (AA22) via cable gland UB2. Use a 2 core cable of at least
PP
2
.
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cables, shielded cable must be used.
If a conduit is used it must be sealed to prevent condensation in
the sensor capsule.
Connecting the current limiter
When many electrical appliances are connected in the property
at the same time as the electric heater is operating, there is a
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steps and the compressor. If necessary, the electrical steps are
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A current sensor should be installed on each incoming phase
conductor in to the distribution box to measure the current. The
distribution box is an appropriate installation point.
Connect the current sensor to a multi-core cable in an enclosure
next to the distribution box. Use unscreened multicore cable of
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2
, from the enclosure to HM270V.
In HM270V connect the cable to the PCB (AA22) on terminal
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sensors.
1 2 3 4 5 6 7 8
AA22-X1
L1
L2
L3
9 10 11 12 13 14 15 16 17
Connection of centralised demand control/tariff
In case centralised demand control or tariff control is used this
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(AA22).
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Tariff A and B can be used in combination.
Indoor unit installation