Page 94 - IOM / ROOFTOP BALTIC Series - 0704 - E
BM 50
J11 J10
RT1
BM 50
J11 J10
BM 50
RT2
BM 50
J11
RT3
J10 J11 J10
RT12
LAN LAN
J14
1
3
J15
C
B
A
2
1
2
3
06
-DT50
DC50
65 34 21
DS50
3twisted pair
AWG24
500m maxi
Cable c.sect.(mm2)
J14
1
3
J15
C
B
A
2
1
2
3
06
-DT50
DC50
65 34 21
DS50
3twisted pair
AWG24
500m maxi
Cable c.sect.(mm2)
J14
1
3
J15
C
B
A
2
1
2
3
06
-DT50
DC50
65 34 21
DS50
3twisted pair
AWG24
500m maxi
Cable c.sect.(mm2)
J14
1
3
J15
C
B
A
2
1
2
3
06
-DT50
DC50
65 34 21
DS50
3twisted pair
AWG24
500m maxi
Cable c.sect.(mm2)
Cable c.sect.(mm2)
2twisted pair
AWG24
500m maxi
SERIAL CARD SERIAL CARD SERIAL CARD SERIAL CARD
control communication links
COMMUNICATION LINKS
Master / Slave
Rooftop can now be connected together (up to 12) via a double shielded pair of wire (0.75mm2 not supplied by Lennox)
and use different running modes, as explained bellow, with no cost increase.
_ 1 : DC50 : Master slave mode "total"
The master gives the ventilation order, and its set point to
all other rooftops.
_ 2 : DC50 Temperature : Master slave mode
"temperature"
The master gives the ventilation order and its room
temperature/humidity to all other rooftops, but they have
their own set point.
_ 3 : DC50 Average : Master slave mode "average"
The master gives the ventilation order and the room
temperature/humidity used by all rooftop is the average of
all rooftop. Each rooftop has its own set point.
_ 4 : Master/Slave Temperature : Master slave mode
"temperature"
The master gives its room temperature/humidity to all
other rooftops, but they have their own ventilation order &
set point.
_ 5 : Master / Slave Average : Master slave mode "ave-
rage"
The room temperature/humidity used by all rooftop is the
average of all rooftop. Each rooftop has its own ventilation
order & set point.
_ 6 : Master / Slave Cooling / Heating : Master slave mode
"cooling/heating"
All rooftop are stand-alone but the slaves have to have the
same running mode as the master (Cooling or heating).
_ 7 : Back-up mode
One rooftop is the back-up unit and will operate if any of the
other rooftop has a failure.
_ 8 : Rolling Back-up mode
Same as above, except the "back-up" unit will be different
each Tuesday. On top of that, the outside temperature/
humidity given to all rooftop can either be the average of
rooftop or be the external humidity/temperature of the
master, making possible the use of a single "weather
station" for the whole site.DS50 Comfort Display / DC50
Service Display
FAN SET POINT ROOM TEMP
COOLING HEAT MODE
1. DC50 MASTER MASTER N/A N/A
2. DC50 Temperature MASTER STAND ALONE MASTER N/A
3 DC50 Average MASTER STAND ALONE AVERAGE N/A
4. Master/Slave Temperature STAND ALONE STAND ALONE MASTER N/A
5. Master/Slave Average. STAND ALONE STAND ALONE AVERAGE N/A
6. Master/Slave Cooling/Heating STAND ALONE STAND ALONE STAND ALONE MASTER
7. Back-up All units are stand alone, one unit is waiting for a failure to start
8 Rolling Back-up All units are stand alone; one unit is waiting for a failure to start.
This back-up unit changes every Tuesday
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