Mounting; Wiring Procedure - Honeywell AQ25A Series Technical Reference Booklet

2 MOUNTING

This section describes how to mount the Expansion Zoning
Panels and thermostats.
Mount Expansion Zoning Panel(s)
1. Remove wire channel plugs from the Control Panel and
any Expansion Panels (see Fig. 3).
2. Mount Expansion Zoning Panel on the right-hand end of
the Main Control Panel.
Fig. 3. Orientation of wire channel plugs for creating pass-through wire channel and
Mount and Wire Thermostats in the Zones
Install the thermostats on the walls in the zones that are to be
controlled by the AQ2000 Control Panels and Expansion
Zoning Panels.
When using AQ1000 thermostats, refer to the included
installation instructions included with that model.
If not done already, run low voltage thermostat wire (24 gauge
or heavier) from the thermostats back to the Expansion Zoning
Panel for use in section 3, "Wiring Procedure" .
NOTE: If not otherwise specified, low voltage wiring should
be run with 18 gauge thermostat wire and line voltage
wiring should be run with 14 gauge wire. AQUATROL
line voltage screw terminals are approved for use with
22 to 12 gauge copper conductors.
Several wiring diagrams are included in this
document. For additional information, refer to
http://customer.honeywell.com or your local
distributor.

3 WIRING PROCEDURE

The AQ255 / AQ257 Expansion Zoning Panels are pre-wired at
the factory, making for faster installation.
• For the AQ25742B and AQ25744B models, the low voltage
output terminals located at the top of the transformer are
wired to the R and C input terminals at the top of the Zoning
Module. In addition, for the AQ25742B model, the low
for joining Main Control Panel to Expansion Zoning Panels.
AQ255 AND AQ257 SERIES EXPANSION ZONING PANELS
3. Reverse wire channel plugs and re-insert them into their
slot to from a wiring channel between the Main Control
Panel and the Expansion Zoning Panel (see Fig. 3) and
to connect the two panels together.
4. Install two top screws of the Expansion Zoning Panel,
ensuring it is level with the adjoining Main Control Panel,
and install two lower screws.
5. Repeat steps 1–4 for any additional Expansion Zoning
Panels.
voltage output terminals located at the top of the
transformer are wired to the R and C input terminals at the
bottom of the Zoning Module.
• For the AQ25582B model, which contains two AQ15540B
Zoning Modules, the B-B "Exp.Bus OUT" terminals of the
Zoning Module on the left side are wired to the B-B
"Exp.Bus IN" terminals of the Zoning Module on the right
side.
NOTE: For examples of wiring Expansion Zoning Panels to
AQ2000 Series Control Panels and wiring additional
low voltage VA capacity, refer to the "Wiring
Diagrams" section in the "Appendix" beginning on
page 12.
Wiring the AQ255 / AQ257 Expansion Zoning
Panel to an AQ2000 Series Control Panel
To wire the Expansion Zoning Panel to an AQ2000 Series
Control Panel or another AQ255 / AQ257 Expansion Zoning
Panel:
1. Ensure the power to the AQ2000 Series Main Control
Panel is disconnected before proceeding.
2. For each zone to be added to the existing AQ2000
system, connect one zone thermostat to its
corresponding TH input terminals on the top of the
Expansion Zoning Panel being installed.
3. The B-B "Exp.Bus IN" terminals of the Expansion Zoning
Panel being installed connect to the B-B "Exp.Bus OUT"
terminals on the Control Module or previously installed
Zoning Module on the furthest right side of the AQ2000
Series installation. These connections are polarity
5
M13757
69-1981—03