Honeywell AQ25A Series Technical Reference Booklet page 61

DIP Switch
1 DHW Device: Pump or Valve
2 DHW Priority: Off or Priority
DHW
DHW Priority Override: Off or O/Ride (override)
3
Boiler post purge location: Off = zones only; Purge = DHW tank first, then zones
4
5 Aux output: Main = default; Group = group pump
Aux.
6 Aux output: Main = default; Bypass = boiler bypass pump
7 Load Mass: Lo = Low mass (baseboard); Hi = High mass (radiant slab)
Mass
8 Not used at this time
Zoning Module DIP Switch Settings
A chart of the different settings for each DIP switch is attached
to the inside of each DIP switch cover.
Refer to Table 3 on page 16, and check all DIP switch settings.
If necessary, change the switch settings to suit the desired
operation of the hydronic installation.
NOTES:
1. To set DIP switches 1 through 4, which identify the
unique address of each zone on the AQUATROL
network):
Refer to the descriptions in Table 3 for the correct
DIP switch settings for the Pump or Valve Zoning
Module.
Unpredictable zone behavior may occur if more
than one Zoning Module has DIP switches (1-4)
set to the same address.
2. DIP Switch 5 enables or disables Zone
Synchronization:
• The factory setting enables Zone Synchronization,
which is an energy saving feature of the AQ2000
panels. Zone Synchronization coordinates zone
demands to start at the same time when the boiler
cycle begins. The AQ2000 functions as activating
valves. The valve logic induces a delay before
activating the boiler pump even when zone pumps
are used. When Zone Synchronization is not
selected, the zone demands are served whenever
they call for heat.
• The Zone Synchronization feature replaces the
pump/valve selection of previous AQ2000 versions.
Table 2. AQ15000B Control Module DIP switch arrangement
Switch Description
15
AQ250 SERIES HYDRONIC CONTROL PANELS
3. 4. DIP Switch 8 functionality:
• The factory setting enables 1-stage per zone
thermostat. The zoning module operates as four 1-
stage zones.
• When using a 2-stage thermostat, set DIP switch 8
to 2-Stg. The 2-stage selection uses TH1 and TH2
inputs for 2-stage thermostat control. For the
selected zone, TH1 is the first stage input from the
thermostat and TH2 is the second stage input.
Inputs TH3 and TH4 operate in same manner. The
2-stage selection reduces the zoning module to a 2
zone module from a 4 zone module.
• When using digital 2-stage thermostats (non
AQ1000 thermostats), the system set-up process
changes slightly. During system set-up, create an
artificial demand on the zoning module by
increasing the set point on the thermostat. The
artificial demand is required during the PRI/SEC
setup menu to select the primary and secondary
loop for each zone and stage.
Review the settings of all DIP switches for each Zoning Module
connected to an AQ15000B, to ensure they are correct before
system start-up.
When you finish setting the DIP switches for all the Zoning
Modules, replace the cover of each Expansion Zoning Panel.
NOTE: The snap-on DIP switch covers are designed so they
cannot be removed (exposing the DIP switches)
when the front cover of the AQ250 Control Panel is in
place.
Label and Factory Settings
AQ15000B
Diagnostic Diagnostic
Test Test
M23719A
68-0306—02
M29043