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15. Control Parameters
See Appendix A.
16. Diagnostics
See Appendix B.
17. Networking the Controllers
A network control panel and Network Control Panel PC software can be used to schedule building operation for any M2 or
M3 Unit Controller on the same daisy-chained L Connection
®
network.
The network control panel is an L Connection direct digital controller used on units which are not equipped with an M3 Unit
Controller. The Building Controller (BC) is used to control building functions such as lights and signs. Use L connection
specific network cable and daisy chain as shown in figure 26.
Up to 31 controllers can be daisy chained on a single L Connection network. Any combination of M1, M2, M3, NTC, and BC
controller can be used (see figure 25).
Network Manager
Network Control
Panel
NON M3
BASED HVAC
Up to 31
Controllers
PC CONVERTER
ETHERNET
CONVERTER
PC
LAN
M2M3
Signs
Fans
Lights
BC
NTC
M1
M1
Figure 25. L Connection Network
SYS BUS TERMINAL
BLOCK ON LENNOX
CONTROLLERS IMC
(M1-1 TO M1-6 L
SERIES)
S-BUS TERMINAL
BLOCK ON LENNOX
PRODIGY M2 OR M3
CONTROLLER
ENERGENCE
SERIES
SYS BUS TERMINAL
BLOCK ON LENNOX
CONTROLLERS IMC (M1-7,
M1-8, NTC, BC AND ZONE
CONTROLLERS)
DO NOT CONNECT THE CABLE SHIELD TO THE ”G” TERMINAL ON M1-6 AND OLDER
CONNECT + TERMINAL OF NCP TO + TERMINALS ON ALL CONTROLLERS.
CONNECT - TERMINAL OF NCP TO - TERMINALS ON ALL CONTROLLERS.
3
2
1
SHIELD
SHIELD
SHIELD
- S + - S +
- G +
SHIELD
Cable type - twisted pair
with shield, 22 awg minim
um, Belden #88761 or
#8761 (Lennox 27M19,
94L63, 68M35).
CONTINUE WIRING TYP.
TO LAST CONTROLLER
ON NETWORK
Figure 26. L Connection
®
Network Daisy-Chain Communication Wiring
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