Purge Air From All System And Zone Piping; Document And Keep A Record Of All System Settings - Honeywell AQ25A Series Technical Reference Booklet

3. Turn up the setpoint of one of the thermostats.
a. The zone valve or pump associated with that zone
turns on.
b. The Boiler T-T relay activates (Boiler displays in the
demands section of the LCD screen and the Boiler
pump relay activates (PRIMary displays in the
outputs section of the LCD screen).
NOTE: See Fig. 22 on page 16 for the demands and outputs
display areas on the LCD.
c. Depending on the settings for the AUX.PUMP (line
voltage rated dry contacts) and the AUX OUT (low
voltage rated dry contacts), either or both of these
relays may also close.
4. Turn down the set point of one thermostat. The zone
valve or pump associated with that zone should turn off.
The Boiler T-T and Boiler pump relay outputs should de-
activate.
5. Repeat steps 3 and 4 for all zones to verify each zone is
operating correctly. Thermostats may be exercised
individually or all together to accelerate the check out
process.
6. Turn up the DHW Aquastat to simulate a call for hot
water.
a. If the DHW device is a pump, the DHW relay output
energizes immediately. The Boiler pump relay
remains off.
b. If the DHW device is a valve, the Boiler pump relay
energizes after a delay to allow the zone valve to
fully open. This delay is selected from the
EQUIPMENT SETUP>DHW>DHW VLV.OP menu
option.
c. Turn up the set point of one thermostat.
(1) If the DHW relay is configured to control a pump,
and DHW PRIOrity is selected, the Boiler and the
associated zone pump's relay remain off.
(2) If the DHW relay is configured to control a valve,
and DHW PRIOrity is selected, the Boiler pump
activates after a delay for the DHW zone valve to
open, but the associated zone relays remain off.
(3) If DHW PRIOrity is disabled, space heating zone
pumps and valves should operate during a call for
DHW.
7. Turn down the DHW Aquastat to end the call for hot
water. Space heating operation should continue (if DHW
priority is disabled) or resume (if DHW PRIOrity is
enabled).
6 PURGE AIR FROM ALL SYSTEM
AND ZONE PIPING
The PURGE operation on the AQ25A Control Panel allows the
installer to purge all zones (loops) sequentially, or each zone
individually, for a period of time, PURGE TIME, which selected
from the EQUIPMENT SETUP>TEST AND PURGE>PURGE
sub-menu. The purge time can be adjusted in increments of 1
minute, up to a maximum of 30 minutes per loop to be purged.
After you have defined which loops to purge (all loops, or an
individual loop) and for how long (using the AQ25A's menus),
position the indicator arrow (←) beside the START PURGE
option and press the OK button. The START PURGE display
will change to STOP PURGE and the AQ25A display begins
counting down the time remaining for the purge cycle.
AQ25A SERIES PROGRAMMABLE BOILER CONTROL PANELS
Purging All Loops
When the purge time has elapsed for the first loop, the control
proceeds to the next loop and performs the purge operation on
each loop in sequential order. After all selected loops have
been purged, the display shows PURGE COMPLETED.
7 DOCUMENT AND KEEP A RECORD
OF ALL SYSTEM SETTINGS
After the AQ25A Series Control Panel has been set up, and the
entire hydronic installation is operating properly, it is important
to document all the system settings for future reference.
Job Records
All AQ2000 Series Panels are shipped with Installation Job
Records for documenting these settings. These should be filled
out completely and saved in the Installing Contractor's files.
NOTES: There are two classes of settings used by the AQ25A
to control the operation of the heating system, Zone
Settings and System (or Equipment) Settings. Both
types of settings are stored in non-volatile memory
and are not lost following an extended power
disruption.
WHEN USING AQ1000 THERMOSTATS
1. Zone Settings are designed to be adjustable by the
user or the installer and are stored in the faceplate
of each zone's AQ1000 thermostat. These settings
are not saved with the SAVE SETUP operation. If
the faceplates of two AQ1000 thermostats are
switched, the settings (setpoints, zone minimum,
zone maximum, etc.) will also be switched.
2. System Settings are designed to be adjustable
only by the system installer and are stored in the
AQ15A Control Module. These are the settings
that are saved with the SAVE SETUP operation.
SAVE Feature
In addition to the hardcopy Installation Job Records, the
AQ25A Control Panel has a convenient SAVE feature that
allows the installing contractor to save the specific equipment
setting for this installation in the AQ25A's memory for future
recall, in case the system's settings are inadvertently changed.
This feature is found in the EQUIPMENT SETUP >
SAVE/RESTORE sub-menu.
There are three levels of settings in the AQ25A's memory –
CURRENT, FACTORY and SETUP.
• CURRENT settings are the settings that are currently
displayed in any of the menus and are the settings that the
AQ25A uses to operate. Any time a value is changed in any
of the menus, the CURRENT settings are changed and
these new settings are instantly used by the AQ25A Control
Panel.
• FACTORY settings are the default values loaded at the
factory and are the starting point for programming the
AQ25A. These values are permanently stored in memory
and cannot be over-written or erased. The AQ25A can be
restored to factory settings through the RESTORE
FACTORY option in the SAVE / RESTORE sub-menu. A
warning prompt, RESTORE FACTORY—ARE YOU
SURE?, displays and YES or NO must be chosen before
proceeding. If YES is selected, the FACTORY settings are
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