Mount Thermostats In The Zones; Wire All System Components To The Control Panel - Honeywell AQ250 Series Quick Installation Manual

AQ250 SERIES HYDRONIC CONTROL PANELS

5 Mount Thermostats In The Zones

Referring to the installation instructions (form # 69-2005)
included with the AQ1000 thermostats, install the thermostats
on the walls in the zones that are to be controlled by the
AQ250 Control Panels. If not done already, run low voltage
thermostat wire (24 gauge or heavier) from the thermostats
back to the AQ250 Control Panel for installation in Step 6

"Wire All System Components to the Control Panel."

6 Wire All System Components To The
Control Panel
NOTES: If not otherwise specified, low voltage wiring should
be run with 18 gauge thermostat wire and line volt-
age wiring should be run with 14 gauge wire.
AQUATROL line voltage screw terminals are
approved for use with 22 to 12 gauge copper.
Several wiring diagrams are included in this docu-
ment. For additional information, refer to http://cus-
tomer.honeywell.com or your local distributor.
STEP 1
A) Temperature Sensors
WIRING
Connect the lead wires of each sensor to the corresponding
terminals on top of the AQ1500B0 Control Module. See
Figure 6.
1. Boiler Supply and Return Sensors.
The Boiler supply water sensor should be installed on
the supply piping close to the exit port of the boiler,
using one of the AQ12C11 strap-on sensors supplied
with the AQ250. See Figure 5.
The Boiler return sensor should be installed on the
return piping as close to the entrance port to the boiler
as practical using the other AQ12C11 strap-on sensor
supplied with the AQ250. The correct location is one
that will measure the temperature of all combined
69-1982
TO EXPANSION ZONING MODULES
(IF INSTALLED)
ZR
STEP 6
Fig. 4 Wiring Sequence
AQ250 Control Panels are pre-wired at the factory (as
described below), making for faster installation:
• The low voltage output terminals located at the top of the
transformer are wired to the R and C input terminals of the
Control Module, and the R and C inputs on the top of the
Zoning Module.
• The B-B "Exp. Bus" terminals of the Control Module are
wired to the B-B "Exp. Bus IN" terminals of the Zoning
Module.
Wiring Procedure
Beginning with the top left of the Control Panel and moving
clockwise around the panel (refer to Figure 4), wire
components to the AQ250 Control Panel and Expansion
Zoning Panels (if installed) in the following six steps:
Step 1 Factory pre-wiring of the Control Panels is shown as
dotted lines in Figure 4. In addition to the pre-wiring,
run low voltage jumper wires from available R and C
terminals to the R and C terminals of any Expansion
Zoning Panels
Step 2 Temperature Sensors, System Demands and
Communication bus wiring.
STEP 2
ZR
Boiler DHW Aux
STEP 5
sources of water returning back to the boiler.
Insulate strap-on sensors with pipe wrap to ensure
accurate boiler temperature sensing.
The supply and return water sensors come with 10 ft.
(3m) of wire to minimize the need for splicing.
Fig. 5 Strap-on temperature sensor installation
4
STEP 3
Boiler Aux.
DHW
STEP 4
M13897
M13763