© 2015 OJ Electronics A/S
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In large buildings with more than 14 zones where multiple manifolds are used,
it is possible to use multiple masters to create a single network.
One master must be defined as the “network controlling master” by setting
both encoders to zero (see figs 13a and 13b).
Subsequent masters (up to nine) should be connected as a “string”, where
they will all use a common pump.
If more than one pump is used, a separate string should be created for each
pump (see fig. 13a).
On the first string of masters, all left-hand encoders must be set to 1, and the
right-hand encoders set in sequence from 1 to 9.
On the second string of masters, all left-hand encoders must be set to 2, and
the right-hand encoders again set in sequence from 1 to 9. This numbering
system can be continued for up to 15 strings.
All masters must be interconnected using special cable via RJ14 socket 1 or 2.
(For further information, see “Interconnection of WLM3 products”.)
All masters must be connected in a daisy chain, NOT in a star formation (see
fig. 13c).
An FS master can be used as the “network controlling master” to control
central mixing of the supply water and boiler activation.
The “network controlling master” can also switch between cooling and
heating for the whole network using the WLAC3 interface module connected
to the thermostat bus.
Time and temperatures for the whole network can be controlled by a single
WLCT3 connected to the “network controlling master” if the WLCT3 is set to
channel F.
special functions
Creating a network
Fig. 13a
BR1025A14a
© 2015 OJ Electronic
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WLM3-BA/FS
2,1
WLM3-BA/FS
2,2
WLM3-BA/FS
2,3
WLM3-FS
0,0
WLM3-BA/FS
1,2
WLM3-BA/FS
1,1
WLM3-AO
WLM3-BA/FS
1,3
-G
B
Circulation pump control of each string
String 2
String 1
Boiler
4-port
valve
Network communication
BR1025A14a
Fig. 13b
BR1025A
11
a
© 2015 OJ Electronic
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9 10
1 2 3 4 5 6 7 8
-G
B
Top PCB
ON
OFF
Common UHF-PUMP
Commission mode
X-REL
AY
Learn mode
Boiler test
Install mode
WLM2 Compatible
ON / OFF Contro
l
String
number
(1-F)
Unit
number
(1-9)
BR1025A1
1a
Fig. 13c
BR1025A18a
© 2015 OJ Electronic
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WLM3-BA/FS Master 1
WLM3-BA/FS Master 2
Master Cable
BR1025A18a
Summary of Contents for WLM3
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