Priority Pump 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 indicating an open
valve.
• After the end switch has closed the AZ-CP control 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 additional 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 satisfied.
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.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
ZONE STAGING
Zone Staging is a feature that is unique to the AZ-6CP
control. When the AZ-6CP senses a power demand that
exceeds the capabilities of the 75VA transformers, the
control will energize one zone at a time until all calling zone
valves are opened. Please note that Priority/Zone 1 is not
affected by Zone Staging and is permitted to open at any
time.
17
PN 240005386 Rev. D [11/15/2021]