Honeywell AQ25A Series Technical Reference Booklet page 159

AQ250, AQ25A, AQ251, OR AQ252
AQ254 #1
AQ254 #2
AQ254 #3
Fig. 5. Wiring procedure for multiple AQ254 Expansion Control Panels to an AQ2000 Series network.
Step 1 – Low Voltage Transformer Wiring
Factory pre-wiring of the Control Panels is shown as dotted
lines in Fig. 4 on page 6.
In addition to the pre-wiring, run low voltage jumper wires from
available R and C terminals on the top of the AQ254's
transformer to the R and C terminals on the top of any
Expansion Zoning Panel connected to the AQ254.
Step 2 – Low Voltage Control Panel Wiring
a. Connect the Secondary loop temperature sensor to
terminals 3 and 4 of the AQ15400B Control Module.
b. If using the 10Vdc modulating output to drive a mix-
ing valve or variable speed pump, connect the modu-
lating device's motor leads to terminals 6 and 7.
c. If using a floating action motorized mixing valve, con-
nect the valve's actuator wires to terminals 8, 9 and
10, being careful to connect the COM wire to termi-
nal 8, the Open wire to terminal 9, and the Close wire
to terminal 10.
AQ25400B "ADD-A-TEMPERATURE" EXPANSION CONTROL PANEL
* *
Menu
OK
Zone 1 Zone 2 Zone 3 Zone 4
Home
Zone 1 Zone 2
Zone 1 Zone 2
Zone 1 Zone 2
7
*
Zone 1 Zone 2 Zone 3 Zone 4 Zone 1
Zone 3 Zone 4 Zone 1 Zone 2 Zone 3 Zone 4 Zone 1
Zone 3 Zone 4 Zone 1 Zone 2 Zone 3 Zone 4 Zone 1
Zone 3 Zone 1 Zone 2 Zone 3 Zone 1
Zone 4 Zone 4
The AQ254 outputs three separate signals for controlling a
mixing device (10Vdc, floating action and variable speed
pump) from three different outputs on the Control Module, but
only one of these three signals should be used to drive the
chosen mixing device.
The variable speed signal is produced by the Control Module in
response to calls for heat from the zones connected to the
AQ254 and the water supply temperature in the secondary
loop, measured by the secondary loop's temperature sensor.
The secondary loop's supply water temperature is reset
(similar to resetting the boiler loop temperature) according to
either the outdoor temperature (OUTDOOR) or the measured
load of the system (LOAD), from internal thermostat feedback.
The type of reset applied to the secondary loop (OUTDOOR or
LOAD) can be selected in the AQ254's programming menus at
system set-up. Refer to section 3, "Program and Configure the
Expansion Control Panel" on page 9.
* *
Zone 2 Zone 3 Zone 4 Zone 1 Zone 2 Zone 3 Zone 4
Zone 2 Zone 3 Zone 4 Zone 1 Zone 2 Zone 3 Zone 4
Zone 2 Zone 3 Zone 4 Zone 1 Zone 2 Zone 3 Zone 4
Zone 2 Zone 3 Zone 1 Zone 2 Zone 3
Zone 4 Zone 4
M27810A
69-1987—02