Honeywell AQ254 Series Manual page 18

AQ250 SERIES HYDRONIC CONTROL PANELS
3. To begin the Auto Test, press the Test button until
you feel a click. The AQ155/AQ157 Zoning Module
now begins the Auto Test routine, and the Diagnostic
LED on the Zoning Module blinks quickly.
4. Pressing the Test button at any time during the Auto
Test routine pauses the routine indefinitely. While
paused, the Diagnostic LED blinks slowly.
5. Pressing the Test button while the Auto Test routine
is paused advances the routine to the start of the
next step in the routine (testing the next zoning out-
put) and the Auto Test routine resumes its test pro-
cedure.
6. When the Auto Test routine is completed, the Diag-
nostic LED returns to a constant ON status (no
blinking).
7. Replace the DIP switch cover on the Zoning Module.
8. For each AQ155/AQ157 Zoning Module connected
to the AQ250, repeat steps 1-7
SEQUENCE OF OPERATION—AQ155/AQ157 ZONING
MODULES
1. When the Auto Test button is pressed, Zone 1 of the
Zoning Module is energized and the Diagnostic LED
on the AQ155/AQ157 begins to blink quickly.
2. Zone 1 remains energized for 15 seconds, then
shuts off.
3. Next, each of the remaining zones is energized,
sequentially for 15 seconds, starting with Zone 2,
and then shuts off.
4. After Zone 4 has de-energizes, the AQ155/AQ157
exits the Auto Test routine and the Diagnostic LED
on the Module returns to steady illumination (no
blinking).
C) End Auto Test
If no errors are detected in the Control Module or Zoning
Module Auto Test routines, the AQ250 is now ready for
operation. If errors are detected, refer to "Troubleshooting"
on page 19.
68-0306—07
Checkout
1. If present, turn down the DHW Aquastat to avoid
interfering with space heating control operation.
2. Turn up the setpoint of one of the AQ1000 zone ther-
mostats.
2.1 The zone valve or pump associated with that
zone turns on.
2.2 The Boiler and T-T relay outputs energize.
NOTE: When a setpoint is changed on an AQ1000
thermostat, the AQ250's boiler short cycle
protection is disabled in favor of a faster
reaction for the user.
3. Turn down the setpoint of one of the AQ1000 zone
thermostats.
3.1 The zone valve or pump associated with that
zone should turn off.
3.2 The Boiler, and T-T relay outputs should de-
energize.
4. Repeat steps 2 and 3 for all zones to verify each zone
is operating correctly. Thermostats may be exercised
individually or all together to accelerate the check
out process.
5. Turn up the DHW Aquastat to simulate a call for hot
water.
5.1 If the DHW device is a pump, the DHW relay
output energizes immediately, and the Boiler
pump relay remains off.
5.2 If the DHW device is a valve, the Boiler pump
relay energizes after a 15 second delay to allow
the zone valve to fully open.
5.3 Turn up the set point of one of the AQ1000 zone
thermostats.
5.3.1 If the DHW relay is configured to control a
pump, and DHW Priority is selected, the
Boiler and associated zone pumps relays
remain off.
5.3.2 If the DHW relay is configured to control a
valve, and DHW Priority is selected, the
associated zone relays remain off.
5.3.3 If DHW Priority is disabled, space heating
(zone pumps and valves) operates
normally even during a call for DHW.
6. 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).
18