Lennox Baltic BCK 020, Installation Operating & Maintenance Manual

Page: 56 / 110

IOM / ROOFTOP BALTIC Series - 0
8
03 - E Page 55
control communication links
CLIMATIC 50
The new generation of microprocessor based control, CLIMATIC™ 50 is fitted to the BALTIC Rooftop range.
It inherits 15 years of technology and field operating experience from its predecessors the CLIMATIC™1 and CLIMATIC™ 2.
LENNOX has found the latest hardware technology available on the market place and developed a software specifically
designed for Rooftop applications, maximising the LENNOX Rooftop efficiency and performance.
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.
SET ROOM COOLING
FAN POINT TEMP HEAT MODE
1.Total master / slave MASTER MASTER MASTER N/A
2. Master / slave temperature MASTER STAND ALONE MASTER N/A
3 Master / slave average MASTER STAND ALONE AVERAGE N/A
4 Master / slave heating / cooling STAND ALONE STAND ALONE STAND ALONE MASTER
5 Back-up All units are stand alone one unit is waiting for a failure to start
6 Rolling Back-up All units are stand alone, one unit is waiting for a failure to start.
This back-up unit changes every Tuesday
_ 1 : Master slave mode "total"
The master gives the ventilation order, its set point and its
room temperature/humidity to all other rooftops.
_ 2 : 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 : 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 mode "cooling/heating"
All rooftop are stand-alone but the slaves have to have the
same running mode as the master (Cooling or heating).
_ 5 : Back-up mode
One rooftop is the back-up unit and will operate if any of the
other rooftop has a failure.
_ 6 : 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.
Table 7
Fig. 81