Purge Air From All System And Zone Piping - Honeywell AQ255 Series Product Data

AQ255 AND AQ257 SERIES EXPANSION ZONING PANELS
STATUS LEDS
Every status LED light (Zone 1, Zone 2, Zone 3, Zone 4) will be
turned on for 15 seconds when its corresponding output is
activated during Auto Test.
DIAGNOSTIC LED
This light is used by the AQ155 / AQ157 to communicate
diagnostic data to the user:
• Constantly ON indicates that the unit is working properly.
• Constant, fast blinking indicates that the unit is in the Auto
Test mode. Constant, slow blinking indicates that Auto Test
mode has been paused.
• Coded blinking is used to communicate an error code to the
user. Refer to the Troubleshooting section of these
instructions for an explanation of these codes.
NOTE: NOTE: The DIAGNOSTIC LED is OFF when the
AQ155 / AQ157 Zoning Module is not powered.
Auto Test Sequence of Operation
1. When the Auto Test button is pressed, Zone 1 of the
Zoning Module energizes and the DIAGNOSTIC LED on
the AQ155 / AQ157 begins to blink quickly. Zone 1
remains energized for 15 seconds, then shuts off
2. Following that, each of the remaining zones energizes
sequentially (starting with Zone 2) for 15 seconds, and
then shuts off.
3. After Zone 4 de-energizes, the AQ155 / AQ157 exits the
Auto Test routine and the DIAGNOSTIC LED on the
Module returns to steady illumination (no blinking).
NOTE: This Auto Test routine works for Zoning Modules
when connected to any AQ2000 Series Control
Panel.
If no errors were detected in the Auto Test routine, the AQ255 /
AQ257 is now ready for operation. If errors were detected, refer
to "Troubleshooting" on page 10 for details.
Test Expansion Zoning Panels used
with AQ25A, AQ251, and AQ252
Control Panels
If this AQ255 / AQ257 Expansion Zoning Panel is connected to
an AQ25A, AQ251 or AQ252 Control Panel, the Test and
Check Out procedure can be done either manually (by
following the preceding method outlined in the "Auto Test -
AQ155 / AQ157 Zoning Modules" on page 7 of this document),
or through the Control Panel's Test and Purge tools. The TEST
feature enables the installer to checkout the system's zone
equipment as part of system commissioning (Checkout).
NOTE: If checking out the operation of more than the
newly-added Expansion Zoning Module, refer to
the Product Data document for the main AQ2000
Series Control Panel: AQ25A (form 69-2119),
AQ251 (form 69-1974) or AQ252 (form 69-1986).
Test Zones
When TEST ZONES is selected, the Installer can test zones
connected to the AQ25A, AQ251 or AQ252 (space heating and
DHW) simultaneously or individually.
69-1981—06
If zones are tested simultaneously (TEST: ALL ZONES), zone
pumps energize immediately (with a delay of 1/10th of a
second delay between each pump to minimize the effect of
inrush currents from the pumps' motors) along with the main
boiler pump.
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 simultane-
ously 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 DIAG-
NOSTIC 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
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