Installation Preparation - Honeywell AQ25A Series Technical Reference Booklet

1 INSTALLATION PREPARATION

NOTES: Throughout these instructions, the following
terminology conventions are used:
— AQ150 refers to the AQ15000B Control Module;
— AQ155 refers to the AQ15540B Zoning Module.
— AQ157 refers to the AQ15740B Zoning Module.
— AQ250 is used when the information applies to both
the AQ25042B and AQ25044B Control Panels. Where
there are specific instructions or details relating to the "-
42B" or "-44B" Control Panels, the full model number
(i.e. AQ25044B) is used;
— AQ255 refers to all of the AQ25542B, AQ25582B and
AQ25742B Expansion Zoning Panels
— AQ257 refers to the AQ25744B Expansion Zoning
Panel. Where there are specific instructions or details
relating to the "-42B", "-82B", "-42B", or "-44B"
Expansion Zoning Panels, the full model number (i.e.
AQ25744B) is used;
— Control Module refers to the component within an
AQ2000 Series Control Panel that performs the master
control operations. See Table 1 on page 2 for specific
models.
— Control Panel refers to an assembled product,
consisting of a transformer, Control Module and Zoning
Module, all contained within an AQ2000 panel
enclosure;
— Expansion Zoning Panel refers to an assembled
product, consisting of a Zoning Module and, if
applicable, a transformer, contained within an AQ2000
panel enclosure. Zoning Modules are available in either
4-zone or 8-zone configurations. Refer to Honeywell
literature Form No. 69-1981 for more information on
these products.
— Zoning Module refers to the component within an
AQ2000 Series Control Panel or Zoning Expansion
Panel.
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
the application.
3. Installers must be trained, experienced, and licensed
service technicians.
4. Follow local codes for installation and application.
5. After installation is complete, check out the product
operation as printed in these instructions.
WARNING
Risk of electrical shock.
Can cause severe injury, property damage or death.
Disconnect power supply before installation and before
servicing.
AQ250 SERIES HYDRONIC CONTROL PANELS
Check That You Have All the Necessary
Equipment For a Successful Installation
• AQ2000 Series components:
— AQ250 Control Panel
— AQ Expansion Zoning Panels (if more than four space
heating zones in the system)
— Digital thermostats (one for every space heating zone
being controlled)
• Boiler supply and return temperature sensors (included with
the AQ250 Control Panel)
• Low voltage thermostat wire
• Zoning equipment (zone valves or pumps)
Read All Instructions Carefully Before
Proceeding
The AQ250 Control Panels are a part of a totally new series of
hydronic controls. And although they - and other AQ2000
system components - are very easy to install and operate, they
are different than other hydronic controls that you have
previously installed. So take a moment to read through this
quick installation guide before beginning the installation.
Failure to follow them could damage the product or cause a
hazardous condition.
Familiarize Yourself With the AQ250 Control
Panel Layout
Refer to Fig. 1 on page 4. All AQ250 Control Panels consist of
three functional components:
1. AQ10X38 transformer (power supply module), which
connects to 120 Vac power and supplies 24 Vac power to
the Control Module and Zoning Modules
2. AQ15000B boiler / DHW Control Module, which controls
the boiler and domestic hot water (DHW) functions as
well as coordinating the overall operation of the hydronic
system.
3. One of two different 4-zone Zoning Modules:
• AQ15740B (part of the AQ25044B Control Panel)
for zoning with 24 Vac zone valves with end
switches.
• AQ15540B (part of the AQ25042B Control Panel)
for zoning with either line voltage circulators or 24
Vac zone valves without end switches.
AQ250 Control Panels can control a maximum of 16 zones by
connecting additional Expansion Zoning Panels to the AQ250
Control Panel. Each Expansion Zoning Panel is configured
with its own bank of DIP switches, located in the left-most
section of each Zoning Module. To expand the capacity of an
AQ250 Control Panel beyond 16 zones, an AQ254 Add-A-
Temperature Expansion Control Panel is required. The
hydronic system can be expanded by 16 zones for each
AQ254 connected to the AQ2000 network. A maximum of
three (3) AQ254 Panels may be connected to an existing
AQ2000 Control Panel for a maximum of 64 zones connected
on the AQUATROL® network
NOTE: If an AQ254 Add-A-Temperature Expansion Control
Panel is used for controlling the temperature in a
mixed loop, it can reset the mixed loop temperature
using LOAD reset, but not OUTDOOR reset, as the
AQ250 panel does not have input terminals for an
outdoor sensor.
3 68-0306—02