Honeywell AQ250 Series Quick Installation Manual page 5

IMPORTANT
Do not run sensor wires parallel, or close, to tele-
phone, Ethernet, or power cables. Cross all power,
Ethernet, and telephone wiring at right angles. If sen-
sor wires are located in an area with strong sources
of electromagnetic interference (e.g. if sensor 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. If using shielded cable
or conduit, connect the shield wire to earth ground
ONLY at the AQ250 panel. DO NOT ground the
shield or conduit at any other location or electromag-
netic shielding will be ineffective. If shielded cable is
used, Honeywell recommends the use of shielded
cable with a continuous ground plane, such as foil,
with an integral "drain wire" for bonding to earth
Fig. 6 Wiring for the AQ250 Control Modules
Step 3 AQ1000 THERMOSTATS
• Using low voltage thermostat wire, connect one AQ1000
communicating thermostat from each zone to the
corresponding "TH" inputs on top of the Zoning Module
(Figure 8).
• If there are additional zones (on Expansion Zoning Panels)
connected to this Zoning Module:
M13769A
DATA BUS
COMMUNICATION
WIRING
ZR Boiler DHW Aux Zone 1
AQ2504B2
Fig. 7 Wiring for Communication Bus
AQ250 SERIES HYDRONIC CONTROL PANELS
B) System Demands
1. Wire the HEAT Demand terminals (7-8) to a system set
point demand, such as a pool or spa (optional).
2. Wire the DHW terminals (#9-10) [optional] to the AQU-
ASTAT or thermostat on the Domestic Hot Water tank
C) Low Voltage Outputs
Wire the BOILER dry contact output (terminals 11-12) to the
T-T terminals on the boiler AQUASTAT. It is not necessary to
use the "T-T" terminals if connecting to a Triple Aquastat,
since the signal to the Aquastat is received from the "ZR" /
"ZC" terminals. See Figures 14a and 14b for line voltage
connection to boiler Aquastats.
D) 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) will not function.
This "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 to the B-B "Exp.
Bus IN" and B-B "Exp. Bus Out", there will be communication!
See example in Figure 7 for how this wiring is to be installed.
The communication bus connections are pre-wired at the
factory for both the "-4B2" and "-4B4" models.
Zone 2 Zone 3 Zone 4
— Run low voltage thermostat wiring from the B-B
"Exp.Bus OUT" terminals (13-14) of the Zoning
Module to the B-B "Exp.Bus. IN" terminals (3-4) on the
Expansion Zoning Panel
Run low voltage thermostat wiring from the R and C terminals
on the Control Panel's transformer to the R and C terminals
on the Expansion Zoning Panel. Alternatively, you can run low
5
Zone 1
Zone 2 Zone 3 Zone 4
AQ2574V4
M13898
69-1982