Honeywell AQ25A Series Technical Reference Booklet page 116

AQ252 Universal Injection/Mixing Boiler Reset Control Panels
AUX-OUT
If the Auxiliary Out low voltage output will be used, wire it now
to the device (e.g., A/C compressor) that will be switched when
the Auxiliary Out's dry contacts close. Wire the hot leg of the
device through the Aux. Out connection (terminals 24 and 25).
The Aux-Out relay contacts close to correspond with an action,
as determined by the installer setup using the EQUIPMENT
SETUP > AUXILIARY I/O sub-menu (see Fig. 25 on page 41).
NOTE: The Aux. Out contacts are rated for low voltage
devices only.
Step 3 – Thermostats Wiring
NOTE: The new AQ2000 panels will work with either digital
(electronic) non-communicating thermostats or
AQ1000 communicating thermostats.
1. Using low voltage thermostat wire, connect one thermo-
stat from each zone to the corresponding THERMO-
STATS Zone X inputs on top of the Zoning Module (see
Fig. 9).
2. If there are additional zones (on Expansion Zoning
Panels) connected to this Zoning Module, run low
voltage thermostat wiring from the B-B Exp. Bus Out
connection (terminals 13 and 14) of the Zoning Module
to the B-B Exp. Bus. In connection (terminals 3 and 4) on
the Expansion Zoning Panel.
69-1986—02
Communication Bus Wiring
All AQ2000 components communicate with each other on the
AQUATROL network using communication bus wiring. This
wiring must connect all AQ2000 components. Otherwise,
features that depend on this networked communication (e.g.,
zone synchronization, outdoor temperature displayed on
thermostats, etc.) will not function.
The communication bus wiring is polarity insensitive. The
installer does not need to worry about a +ve or –ve orientation
of the wires. If there are two wires connected between the B-B
Bus Exp. In on one module and B-B Bus Exp. Out on another
module, there will be communication. See example in Fig. 8 for
how this wiring is to be installed.
The communication bus connections for AQ252 Control
Panels are pre-wired at the factory.
DATA BUS
COMMUNICATION
WIRING
Zone 1
AQ25242B
Fig. 8. Wiring for communication bus.
IMPORTANT
10
Zone 2 Zone 3 Zone 4
Do not run thermostat wires parallel, or close, to
telephone, Ethernet, or power cables. Cross all
power, Ethernet, and telephone wiring at right angles.
If thermostat wires are located in an area with strong
sources of electromagnetic interference, or EMI, (e.g.,
if thermostat wires are run in the same electrical
chase as line voltage wiring) use twisted pair,
shielded cable, or run wires in a grounded metal
conduit.
This is important, because the AQ1000 thermostats
are communicating thermostats which send and
received data via the two wires connecting them to
the Zoning Module. This data can be distorted by the
EMI, potentially causing the AQ252 to not operate
properly.
3. Run low voltage thermostat wiring from the R and C
output terminals on the secondary of the AQ252 Control
Panel's transformer to the R and C input terminals on the
Expansion Zoning Panel. As an alternative, you can run
low voltage thermostat wiring from the R and C terminals
on the Zoning Module to the R and C terminals on the
Expansion Zoning Panel.
Zone 1
Zone 2 Zone 3 Zone 4
AQ25744B
M27686A