Mitsubishi Electric PURY-P72 Service Handbook page 33

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[II Restrictions
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~CAUTION
1) Wiring should be covered by insulation tube with supplementary insulation.
2) Use relays or switches with lEG or equivalent standard.
3) The electric strength between accessible parts and control circuit should have 2750V or more.
Example of wiring connection
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(2) CN3S - - - - - - - - - -
, Outdoor unit
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Relay
circu~
Adapter *2 control board
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in the field ~----
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Maximum cable
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length is 10m
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X : Relay Contact reting voltage >= DC15V
Contact reting current >= 0.1 A
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Minimum applicable load =< 1mA at DC
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Snow sensor: The outdoor fan
runs
whan
X
is closed
in stop mode or thermostat mode.
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:!A,?:S~6~-~r~ld~UPE!Y'
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Distant control
board
Relay circu~
Adapter *1 Outdoor unit
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Preparations
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in the field Maximum cable
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l1 : Outdoor unit error display lamp length is 10m
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l2 : Compressor operetion lamp (compressor running state)
X, V: Relay (coil =<0.9W: DC12V)
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*1, Optional part: PAC-SC37SA-E or field supply.
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(1)CN51---
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(3) CN3N - - - - - - - -
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Relay circuit Adapter *2 Outdoor unit
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r-----, -----;
control board
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CN3N
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LpreparationsJ
in the field Maximum cable
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length is 10m
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X
OFF
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ON
Y
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OFF
Normal
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ON
Cooling
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Heating
X : Cooling / Heating
V :
Validity /Invalidity of
X
X,V : Relay Contact reting voltage >= DC15V
Contact reting current >= 0.1 A
Minimum applicable ioad =< 1mA at DC
*2. Optional part : PAG-SC36NA-E or field suppiy.
Maximum cable
length is 10m
X : Low-noise mode
V : Compressor ON/OFF
X,V : Relay Contact reting voltage >= DC15V
Contact reting current >= 0.1 A
Minimum appicable load =< 1mA at DC
*2. Optional part: PAG-SC36NA-E or field supply.
(4) CN3D - - - - - - -:-
, Outdoor Ulllt
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i~a2'~IDrc::!!--~ ,-~a£l~~~t!J::1
board
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y
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Lpreparations
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in the field ~----
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L Preparations
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in the field ~----
Maximum cable
X : low-noise
mod~ngth
is 10m
X: Relay Contact reting voltage >= DC15V
Contact reting current >= 0.1 A
Minimum applicable load =< 1mA at DC
*2. Optional part : PAG-SC36NA-E or field supply.
low-noise mode : The noise level is reduoad by controlling the maximum
fan frequency and maximum compressor frequency.
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HWEoa03A
- 23- GB