Maico WS 170 L Notice D'installation page 64

uk │ 6. Installation ‒ Connection options
6.12 Connection option 5: WS 170
with RLS 1 WR or RLS D1 WR
and hygrostat HY 5
Refer also to the wiring diagram in the
appendix
A WS 170 electronic slide-in module
A2 Control circuit board: Jumper 8
bridged and jumper 10 (CO2)
= open (= factory setting)
B RLS D1 WR room air control
B1 RLS 1 WR room air control
r.h.(RH) HY 5 or HY 5I hygrostat
 accessories
W1 230 V AC connection cable
W2, W2´ Control cable for room air control
W4 Connection cable for an external
hygrostat (to be supplied by the
customer). Connection to A2 control
circuit board at CO2 terminals, Fig.
62
When connecting a hygrostat with potential-
free contact for demand-driven removal of
moisture, the hygrostat must have a potential-
free switching output.
The hygrostat always switches the ventilation
unit to ventilation level 3 if the set humidity
value is exceeded (potential-free contact in
hygrostat closes).
If the humidity in the room drops, the
ventilation unit switches back to the
previously selected ventilation level.
If you switch manually from ventilation level 3
to level 2 or 1, this deactivates the automatic
function of the hygrostat temporarily. This is
then switched back to active if the level drops
below the hygrostat setpoint once.
Connect the hygrostat to terminal
"CO2".
Jumper 10 on the A2 control circuit
board must be open.
Set the switching point at the hygro-
stat manually.
Never connect a hygrostat and
CO sensor at the same time.
2