Install Instructions

21
SEQUENCE OF OPERATION
The primary pump will be energized with 120 •
volts.
–
DPM-2 CHOSEN –
The control will scan all TT terminals looking for
•
a call for heat from any thermostat.
When a call for heat is detected the green TT
•
LED for that zone will illuminate.
The corresponding zone terminals 1 & 2 will be
•
energized with 24 volts.
The control will then wait for the zone valve end
•
switch to close; a red LED will illuminate indi-
cating an open valve.
After the end switch has closed the AZ-CP con-
•
trol will wait to receive a signal from the DPM-2.
Please see the separate DPM-2 manual for the
DPM-2 sequence of operation.
Once the DPM-2 sends a signal back to the AZ-
•
CP control the primary pump is energized with
120 volts and the X-X contact will close.
– PRIORITY TIMER –
When the priority zone has called for heat for 30 minutes, the priority
and non-priority zones are allowed to call for heat together for an addi-
tional 30 minutes. After the second 30 minute period ends, the control
will switch back to priority only mode. This pattern is repeated until the
priority zone is satised.
–
PUMP INACTIVE TIMER –
(EXERCISES PUMPS IF OFF FOR MORE THAN 24 HOURS)
If either the primary or priority pump is off for more than 24 hours, both
pumps are turned on for 5 seconds and then turned off.
If either pump is turned on, the timer is reset.
IMPORTANT: The ZR-ZC and DPM-2 selection switches
should not both be in the “On” position at the same time.