Navien CR-180 Installation Manual page 37

3. Step 3: Communication set-up
A f t er the cable co nnecti o ns and DIP sw itches are set - up, the co mmunicati o n set - up sho uld be do ne .
3.1 Master set-up
A f t er the pow er ON , each FND 1 w ill display o n the P C B as bel o w:
Unit Master Unit
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FND1
FND1 display: Master set-up
3.2 Slave set - up
A f t er the master set - up, push the S W 3 and SW 4 o f slav e 1 unit simultaneo usly mo re than 3
seco nds.
FND 1 o f the slav e 1 unit w ill be changed t o " S 00 1 ".
Sla v e 2 unit also can be set - up as abov e.
A f t er the slav e set - up, each FND 1 w ill be changed o n the P C B as bel o w:
Unit Master Unit
I H D.llll
FND1
FND1 display: Slave set-up
3.3 Set-up finish
A f t er the slav e set - up, push the S W 3 and SW 4 o f the master unit simultaneo usly mo re than 3
seco nds .
All the FND w ill be changed t o the setting temperature display and set - up pro cedures are finished .
4. Master unit Change
I t is al w ay s po ssible t o change the master unit . Af t er all units pow er o f f , choo se o ne o f the units as
the master unit and change the DI P SW 2 (# 1 sw itch) acco rding t o master unit change .
T hro ugho ut co mmunicati o n set - up (St ep 3 ) master unit change w ill be do ne .
5. Slave unit Addition/Removal
I t is al w ay s po ssible t o add o r remov e the slav e unit. Aft er all unit pow er OFF, the co mmunicati o n
cable is added o r remov ed o n the P C B acco rding t o slav e unit additi o n o r remo v al .
Slav e 1 Unit
S la v e 1 Unit
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Sla v e 2 Unit
S lav e 2 Unit
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