Wiring Procedure; Configure The Expansion Zoning Panel(S) Dip Switches - Honeywell AQ255 Series Product Data

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
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 11.
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 sys-
tem, 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 insen-
AQ255 AND AQ257 SERIES EXPANSION ZONING PANELS
sitive, so it does not matter which of the BB "Exp.Bus
OUT" terminals is connected to which of the B-B
"Exp.Bus IN" terminals.
4. Wire the zoning equipment to the output terminals (bot-
tom edge) of the Expansion Zoning Panel – line voltage
circulators or valves for the AQ25542B and AQ25582B
and low voltage zone valves for the AQ25742B and
AQ25744B.
5. Bring power to the Expansion Zoning Panel as follows:
a. AQ25542B: run 14 AWG jumper wires from the N
and L terminals on the bottom of the AQ2000 Series
Control Panel's AQ10X38 transformer to the N and L
terminals on the bottom of the AQ15540B module.
b. AQ25582B: run 14 AWG jumper wires from the N
and L terminals on the bottom of the AQ2000 Series
Control Panel's AQ10X38 transformer to the N and L
terminals on the bottom of EACH AQ15540B Zoning
Module.
c. AQ25742B: run 14 AWG jumper wires from the N
and L terminals on the bottom of the AQ2000 Series
Control Panel's AQ10X38 transformer to the N and L
terminals on the bottom of the AQ25742B's
transformer module (AQ10X38).
d. AQ25744B: run 14 AWG jumper wires from the N
and L terminals on the bottom of the AQ2000 Series
Control Panel's AQ10X38 transformer to the N and L
terminals on the bottom of the AQ25744B's
transformer module (AQ10X38).
The AQ255 / AQ257 Expansion Zoning Panels can control up
to 4 space heating zones (or 8, for the AQ25582B Expansion
Zoning Panel). The heart of each Expansion Zoning Panel is its
Zoning Module. The corresponding Panels and Modules are
shown in Table 1 on page 2.
For the -42B and -82B Panels, line voltage pumps are used for
the zoning equipment so low voltage (24 Vac) power is not
required. That's why there isn't a transformer included with
these Panels. A small amount of low voltage power is required
to power the electronic components inside the Zoning
Modules, and this is supplied by jumper wires connecting the R
and C terminals of the AQ2000 Series Control Panel's
AQ10X38 transformer with the R and C terminals on the
AQ15540B Zoning Module.
For the -42B and -44B Valve Panels, an AQ10X38 transformer
is included to provide sufficient low voltage power to drive the
zone valves.
4 CONFIGURE THE EXPANSION
ZONING PANEL(S) DIP
SWITCHES
Setting up the AQ255 / AQ257 Expansion Zoning Panels is
quick, simple and straightforward. All that's needed is to check
and if necessary adjust, the DIP switch settings.
For all Expansion Zoning Panels, DIP switches are located
behind the blank cover in the left most section of the Zoning
Module (beside the section labeled Zone 1). Refer to Fig. 4.
The DIP switches come pre-set from the factory with default
settings that are the most commonly-used by hydronics
contractors across North America. That means that most of the
settings only need to be checked by the installing contractor to
make sure they're suitable for the job, rather than having to
adjust the DIP switch settings from scratch, which is a great
time savings.
5 69-1981—06