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

When zone valves are tested simultaneously, the valves are
energized immediately but the boiler pump is energized only
after either:
a. the valves end switches close, or
b. the TIME TO OPEN value (in the EQUIPMENT
SETUP > ZONING menu) has elapsed, to allow
enough time for the zone valves to fully open.
A zero (0) displayed after a zone's ID address (e.g., Zone A1 0,
A2 0, ... A16 0) indicates that the Control Module has received
confirmation that the zone's pump relay is not energized or its
zone valve is fully closed.
Similarly, a one (1) displayed after a zone's ID address (e.g.,
Zone A1 1, A2 1, ... A16 1) indicates that the Control Module
has received confirmation that the zone's pump relay is
energized or its zone valve is fully open.
To test zones individually, position the indicator arrow (←)
beside a selected zone and press the "+" button to energize it,
and then press the "–" button to de-energize it. As each zone is
tested, the Status LED on the Zoning Module associated with
that zone illuminates. To test additional zones, position the
indicator arrow (←) beside the zone to be tested, press the "+"
button to energize the zone's pump or valve, and then press
the "–" button to de-energize it. When finished testing the
zones, press the MENU button to return to the SETUP >TEST
AND PURGE menu.
6 PURGE AIR FROM ALL SYSTEM
AND ZONE PIPING
For Expansion Zoning Panels connected to AQ250 Control
Panels, continue with the "AQ250 Models" section.
For Expansion Zoning Panels connected to AQ25A, AQ251, or
AQ252 Control Panels, go to "AQ25A, AQ251 and AQ252
models" on page 9.
AQ250 Models
Purging air from all zones in the hydronic system can be easily
accomplished with the AQ250 by using a modification to the
AUTO TEST feature as follows:
1. To purge all zones on the AQ250 network at the same
time, press the TEST button on the AQ15000B Control
Module. All zone equipment relays energize simulta-
neously and remain energized for the duration of the
Auto Test routine.
2. The AQ250 then begins its Auto Test routine, starting
with energizing the Boiler pump.
3. When the Boiler pump LED lights up, quickly press the
TEST button to pause the Auto Test routine. The
DIAGNOSTIC LED blinks slowly while in paused mode.
4. The Boiler pump and all zones continue to be energized
(and therefore are purging their loops of air) until the
TEST button is pressed again.
5. When the boiler loop has been purged sufficiently, press
the TEST button again to energize the AUX relay. If there
is a pump connected to the AUX output, press the TEST
button again as soon as the AUX LED is illuminated, to
perform the purge routine on the AUX loop. If the AUX
loop does not need to be purged, or there is not a pump
connected to the AUX relay, press the TEST button
again to advance to the next step in the test sequence.
AQ255 AND AQ257 SERIES EXPANSION ZONING PANELS
6. When the DHW device energizes, its LED lights up.
Quickly press the TEST button to pause the Auto Test
routine and purge the DHW loop for as long as
necessary The DIAGNOSTIC LED blinks slowly while
the Auto Test is paused.
7. When the DHW loop has been purged sufficiently, press
the TEST button again to advance to the next step in the
test sequence (shorting the Boiler T-T dry contacts).
Press the TEST button again to skip this step and finish
the Purge procedure.
8. The Auto Test routine is complete when the
DIAGNOSTIC LED steadily illuminates (no blinking).
If additional purging is required for any zone, the Auto Test
procedure can be activated for any Zoning Module by pressing
the TEST button located above that Zoning Module's DIP
switches. Refer to the "Auto Test Sequence of Operation" on
page 8.
AQ25A, AQ251 and AQ252 models
The PURGE operation on the AQ25A, AQ251, and AQ252
Control Panels allow the installer to purge all zones (loops)
sequentially, or each zone individually, for a period of time
PURGE TIME selected in the EQUIPMENT SETUP >TEST
AND PURGE > PURGE menu. PURGE TIME can be adjusted
in multiples of one (1) minute, up to a maximum of 30 minutes
per loop to be purged.
Once you have selected which loops to purge (ALL loops, or
an individual loop) and for how long (using the Control Panel's
menus), position the indicator arrow (←) beside the START
PURGE option and press the OK button. The START PURGE
display changes to STOP PURGE and the Control Panel's
display begins counting down the time remaining for the purge
cycle. When the purge time has elapsed for the first loop, the
control proceeds to subsequent loops and performs the
PURGE operation on each of them. After all selected loops are
purged, the display changes to PURGE COMPLETED.
7 DOCUMENT AND KEEP A RECORD
OF ALL SYSTEM SETTINGS
Once the hydronic installation with the AQ2000 Series Control
Panel has been set up, and the entire installation is operating
properly, it is important to document all the system settings for
future reference.
Job Records
All AQ2000 Series Expansion Zoning 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.
SAVE Feature (AQ25A, AQ251, and AQ252
Control Panels)
In addition to the hardcopy Installation Job Records, the
AQ25A, AQ251, and AQ251 Control Panels have a convenient
SAVE feature that allows the installing contractor to save the
specific equipment setting for this installation in the Control
Panel'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 of the
Control Panel.
9 69-1981—03