Honeywell HVAC400x Applications Manual page 150

HVAC400X – APPLICATION MANUAL
If not, the Pump and Fan Cascade logic will not connect it.
M1
A. Starting order of motors.
The sequence of the motors is 1, 2, 3, 4, 5.
If you remove the interlock of Motor 3, that is, you set the value of P3.5.1.28 is set to OPEN, the sequence changes
to 1, 2, 4, 5.
M1
A. Starting order of motors.
If you add Motor 3 again (you set the value of P3.5.1.28 to CLOSED), the system puts Motor 3 last in the
sequence: 1, 2, 4, 5, 3. The system does not stop, but rather continues to operate.
EN2B-0417GE51 R0719
M2
Fig. 45. The interlock logic 1
Legend
M2
Fig. 46. The interlock logic 2 (ID428 = FALSE)
Legend
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A
M3 M4
A
X
M3
M4
M5
M5