Can I assume you are referring to the LunarSim module???
Hookup is simple:
1) Set the address; pick an address that does not conflict with other devices you may have (e.g., DCx, AquaAurf, etc)
2) Add a timer to the AC that matches the address (e.g., MON$-D01 )
3) Add program line to turn the LunarSim on, following the lunar cycle (If Moon 000/000 Then MON ON)
4) Optional: Add statements to turn off the moon when tank lights are on (if Timer LT1 = On Them MON OFF)
5) Sit back and enjoy...