Page 1
AQ25400B “Add-A-Temperature”
Expansion Control Panel
mixing higher temperature water from the primary (boiler) loop
with cooler water returning from the heat emitters in the
secondary loop that is being controlled by the AQ254.
The mixing action is accomplished by one of three outputs on
the AQ254’s Control Module:
• a line voltage injection pump,
• a 24 Vac floating action motorized mixing valve, or
• a 0-10 Vdc (or 2-10 Vdc) modulating output (for a
motorized mixing valve or variable speed pump). The
floating action mixing valve can be either a rotary or globe
style design.
FEATURES
The AQ25400B has the following features:
• Controls one mixed temperature loop.
• Outdoor temperature compensation (reset), or Load
reset based on indoor temperature feedback, or none.
PRODUCT DESCRIPTION
The AQ25400B “Add-A-Temperature” Expansion Control
Panel provides additional zoning capacity for an existing
hydronic installation controlled by an AQ2000 Series Boiler
Control Panel such as an AQ250 Relay Boiler Control, an
AQ25A Programmable Boiler Control, an AQ251 Reset Boiler
Control, or an AQ252 Universal Injection/Mixing Boiler Reset
Control. The AQ254, which can control up to 16 zones of
heating in addition to the zones connected to the Master
AQ2000 Series boiler control, maintains the water
temperature in a secondary loop of a hydronic system by
• Zone synchronization through Zone of Greatest
Demand control.
• Customizable control settings allow for greater level of
control and comfort.
• Use of variable speed injection pump or motorized
mixing valve for mixed temperature loop control.
________________________________________________
IMPORTANT
To ensure correct installation and proper operation of
the control, perform the 6 installation steps in the
order numbered in the “Contents” below.
PRODUCT DATA
Contents
Specifications ................................................................... 2
1 Installation Preparation .................................................. 3
2 Wiring Procedure ........................................................... 5
3 Program and Configure the Expansion Control Panel ... 9
4 Test and Check Out the Installation ............................... 11
5 Purge Air from all System and Zone Piping .................. 12
6 Document and Keep a record of all System Settings .... 12
Troubleshooting ................................................................ 13
Appendix .......................................................................... 14
Home Page and System Status Page .................... 14
Installer Programming Menu .................................. 15
69-1987-02
Page 2
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
• Extends the capacity of an existing AQ2000 hydronic
control panel by up to 16 zones and one reset mixed
temperature loop.
• Intuitive programming interface (can be programmed
at your shop and taken to the job site “ready-toinstall”).
• Integral 38 VA transformer with self resetting
electronic fuse.
• Equipment settings are stored in a non-volatile
EPROM memory so the AQ254 retains all program
settings during a power outage.
SPECIFICATIONS
Application: Provides additional zoning capacity for an exist-
ing hydronic installation controlled by an AQ2000 Series
Boiler Control Panel.
Power and Electrical Ratings:
Power Supply: 120 Vac / 60Hz
Auxiliary Pump Output Rating: Dry contact output,
120 to 240 Vac 5A, 1/3 HP
Secondary Pump Output Rating: 120 Vac 5A, 1/3HP
Variable-Speed Injection Pump Output: Triac
modulated; 120 Vac 2.1A, 1/6HP
B–B Communication Bus Terminals: Low voltage,
Class II, 2-wire polarity-insensitive, digital
communicating link to other Control or Zoning modules.
Electrical Connections (Line Voltage): Wire-clamp
screw terminals; maximum 2 x 14 AWG each on line
voltage terminals
Temperature Ratings:
Secondary Loop Mixing (Supply) Design Temp
Range: 70°F to 210°F (21°C to 99°C)
Secondary Loop Mixing (Supply) Min. Control Temp
Range: OFF, 35°F to 150°F (OFF, 2°C to 66°C)
Secondary Loop Mixing (Supply) Max. Control Temp
Range: OFF, 80°F to 210°F (OFF, 27°C to 99°C)
Sensor Temperature Rating: -58°F to 230°F (-50°C to
110 °C)
Inputs/Outputs:
Auxiliary (Demand) Input: External dry contacts
connection only
DHW Demand Input: External dry contacts connection
only
Secondary Sensor Input: External dry contacts
connection only
Mixing Valve (Com, O, C) Output: 24 Vac, 0.5A, 12VA
Modulating Output: 0-10 or 2-10 Vdc for variable speed
pump or modulating mixing valve
User Interface (Setting, Programming): 8-character, 3-line
LCD Display with a 3 button keypad
Thermostat Compatibility: Digital non-communicating
thermostats and/or AQ1000 Series 2-wire communicating
thermostats
Secondary (Mixed) Loop Sensor: 10K ohm NTC thermistor
at 77°F (25°C) ± 0.5°F (±0.3°C). Lead length: 10 ft. (3.0 m);
up to 500 ft. (150 m) using 18 AWG or larger wire,
beta=3892
Environmental Ratings:
Control and Zoning Panel Temperature Rating: 32°F to
130°F (0°C to 55°C)
Operating Humidity Range (% RH): 5 to 90% RH, non-
condensing
Dimensions (HxWxD): 8.0 x 9.4 x 3.3 in. (20.3 x 23.8 x 8.5
cm) approximate
Weight: 3.9 lb. (1.8 kg)
Approvals: Canadian Standards Association: Certified, File
No. LR76030
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
69-1987—02 2
Page 3
1 INSTALLATION PREPARATION
A
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL 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.
Check That You Have All the Necessary Equipment For a Successful Installation
• AQ2000 Series components:
— AQ2000 boiler Control Panel (such as AQ250, AQ25A,
AQ251, or AQ252)
— AQ254 “Add-A-Temperature” Expansion Control Panel
— AQ Expansion Zoning Panel (at least one Expansion
Zoning Panel must be connected to an AQ254 to pro-
vide input from zone thermostats associated with the
mixed temperature loop controlled by the AQ254)
— Digital thermostats (one for every space heating zone
being controlled)
• Secondary loop supply temperature sensor (included with
the AQ254 control panel)
• Mixing device (injection pump, floating 2-, 3- or 4-way
motorized mixing valve, modulating 0-10 Vdc [or 2-10 Vdc]
motorized mixing valve or variable speed pump
• Secondary loop pump
• Low voltage thermostat wire
• Zoning equipment (zone valves or pumps)
The AQ254 is designed to be connected to an AQ2000 boiler
Control Panel - it cannot be operated as a standalone device.
Product Data sheet before
follow them could damage the product or cause a hazardous
condition.
beginning the installation. Failure to
Familiarize Yourself With the AQ254 Control Panel Layout
The AQ254 “Add-A-Temperature” Expansion Control Panel
consists of two functional components (see Fig. 1 on page 3):
• The AQ10X38 transformer (power supply module), which
connects to 120 Vac power and supplies 24 Vac power to
the Expansion Control Module and any connected Zoning
Modules.
• The Mixing Control Module, AQ15400B, which controls the
mixing device (pump or valve) to maintain the secondary
loop temperature according to the method of reset (outdoor
or load adaptive reset).
TRANSFORMER
LOW
VOLTAGE
(24V)
CONTACTS
SYMBOL
LINE
VOLTAGE
(120V)
Fig. 1. AQ254 Expansion Control Panel layout.
The top terminals of the AQ254 carry low voltage (24 Vac)
power and the bottom terminals carry line voltage (120 Vac)
power. This is illustrated in Fig. 1.
The powered terminals on the bottom of the AQ254 are
connected internally, as shown in by the dashed lines in Fig. 1.
The voltage supplied to the N and L terminals is also available
at the SEC pump and variable speed injection pump terminal
pairs when the hot ( ) relays are switched.
CONTROL MODULE
M27808
The AQ254 Control Panel can control a maximum of 16 zones
by connecting additional Expansion Zoning Panels to the
AQ254 Control Panel. 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.
Read All Instructions Carefully Before Proceeding
The AQ254 Control Panel is a part of a totally new family 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
3 69-1987—02
The 38 VA transformer included with the AQ254 has sufficient
capacity to provide low voltage power to the AQ15400B
Control Module as well as up to 16, AQ1000 thermostats.
All low voltage contacts (terminals 3 to14) on the top of the
AQ15400B Control Module are internally-powered.
IMPORTANT
Voltage must not
nals or the internal electronics of the AQ15400B could
be damaged.
The 10kΩ sensor for measuring the secondary loop (mixed)
temperature is the only low voltage input on the AQ254 Control
Panel (besides the 24 Vac R and C supply terminals). There
are two low voltage outputs: a 0-10Vdc (or 2-10Vdc)
be applied to the low voltage termi-
Page 4
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
modulating signal to drive a modulating mixing valve or a
variable speed pump, and a 24 Vac set of terminals that
provides a floating signal to a motorized mixing valve.
Line voltage outputs include a secondary pump relay and a
variable speed injection output which drives a fixed speed
circulating pump at a varying speed depending on the heat
input required for the secondary mixed loop.
On the bottom of the Control Module, there is a set of line
voltage-rated auxiliary (AUX.) dry contacts that can be
programmed to close under several predefined conditions,
making this Control Panel a very versatile mixing controller for
hydronic systems.
MOUNTING
Since the AQ254 “Add-A-Temperature” Panel is an Expansion
Control Panel, it functions as an “add-on” control to an existing
Main AQ2000 Series Boiler Control. The AQ254 is designed to
be connected to an AQ2000 boiler Control Panel - it cannot be
operated as a standalone device.
IMPORTANT
The Main AQ2000 Series Control Panel (an AQ250,
AQ25A, AQ251, or AQ252), and any Expansion Zoning Panels connected to the Main panel) must be
mounted on the wall of the mechanical room before
the AQ254 can be installed.
Mount AQ254 Control Panel
Mount the control panel on the wall using Fig. 2 as a guide:
1. Remove the wire channel plugs from the AQ254.
2. Mount the AQ254 on the right hand end of the main
AQ2000 Series Control Panel (or Expansion Zoning
Panel).
3. Reverse the wire channel plugs and re-insert them into
the groove from where they were removed to form a wiring channel between the main AQ2000 Series Control
Panel (or Expansion Zoning Panel) and the “Add-A-Temperature” Control Panel.
4. Install the two top screws, mount the panel, and install
the two lower screws.
Mount Expansion Zoning Panel(s)
If there are Expansion Zoning Panels to install, mount them to
the wall now:
1. Remove wire channel plugs from the AQ254 Control
Panel and any Expansion Zoning Panels (see Fig. 2).
2. Mount Expansion Zoning Panel on the right-hand end of
the AQ254 Control Panel. Install two top screws of the
Expansion Zoning Panel, ensuring it is level with the
adjoining Control Panel, and install two lower screws.
3. Reverse wire channel plugs and re-insert them into their
slot, to form a wiring channel between the Control Panel
and the Expansion Zoning Panel. Refer to Figure
Fig. 5 on page 7 for an example of an installation with
multiple AQ254 Expansion Control Panels
4. Repeat steps 1–3 for any additional Expansion Zoning
Panels.
WIRE
CHANNEL
PLUGS
WIRE
CHANNEL
PLUGS
Fig. 2. Orientation of wire channel plugs for creating pass-through wire channel and
for joining Control Panel to Expansion Zoning Panels.
69-1987—02 4
M23733A
Page 5
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
Mount and Wire Thermostats in the Zones
Install the thermostats on the walls in the zones that are to be
controlled by the AQ2000 Series panels, and (if not done
already) run low voltage thermostat wire (24 gauge or heavier)
from the thermostats back to the Zoning Modules connected to
the AQ254 Control Panel.
When using AQ1000 thermostats, refer to the installation
instructions included with the AQ1000 thermostats.
Connect floor sensors (part # AQ12C20) to the thermostats for
any space heating zones with in-floor heating, where
temperature regulation of the floor is required.
Spare Fuse
The AQ254 includes a fuse to protect the electronic circuit that
drives the variable speed injection pump output. Although it is
unlikely that the fuse will be blown – as injection pumps rarely if
ever exceed the 1/6 HP rating for this output – there is a spare
fuse attached to the side of the AQ254 housing. See Fig. 3 for
location of this spare fuse. If additional replacement fuses are
needed, please contact Honeywell Technical Support at 1-800318-0815.
2 WIRING PROCEDURE
The AQ254 Control Panel is pre-wired at the factory, making
for faster installation:
• The low voltage output terminals located at the top of the
AQ10X38 transformer are wired to the R and C input
terminals of the AQ15400B Control Module, and
• The line voltage terminals on the bottom of the AQ10X38
transformer are connected to the N and L terminals on the
bottom of the AQ15400B Control Module.
NOTES: 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 only approved for use
with 14 gauge copper conductors.
Several wiring diagrams are included in this
document. For additional information, refer to
http:// customer.honeywell.com or your local
distributor.
Beginning with the top left of Fig. 4 on page 6 and moving
clockwise around the panel, wire components to the AQ254
Expansion Control Panel and Expansion Zoning Panels (if
installed) in the following six steps:
• “Step 1 – Low Voltage Transformer Wiring” on page 7
• “Step 2 – Low Voltage Control Panel Wiring” on page 7
• “Step 3 – Communications Bus Wiring” on page 8
• “Step 4 – Line Voltage Wiring” on page 8
• “Step 5 – Connection to Expansion Zoning Panels” on
page 8
• “Step 6 – Connection to Line Voltage Power” on page 8
3A FUSE
SPARE
FUSE
Fig. 3. Location of spare fuse for AQ254
Expansion Control Panel
M13884
5 69-1987—02
Page 6
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
STEP 3
120V TO
ELECTRICAL
PAN EL
STEP 1 STEP 2
24 VAC TO
EXPANSION
ZONING PANELS
(IF INSTALLED)
120V TO
EXPANSION
ZONING PANELS
(IF INSTALLED)
SECONDARY
SENSOR
SECONDARY
LOOP PUMP
FLOATING
ACTION
VALV E
10 VDC
AUX DEVICE
(OPTIONAL)
INJECTION
PUMP
STEP 5 STEP 4
FACTORY WIRING
(LOW VOLTAGE)
FIELD WIRING
(LOW VOLTAGE)
FACTORY WIRING
(LINE VOLTAGE)
FIELD WIRING
(LINE VOLTAGE)
M27809A
Fig. 4. Wiring sequence.
69-1987—02 6
Page 7
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
A
AQ250, AQ25A, AQ251, OR AQ252
AQ254 #1
AQ254 #2
*
Menu
OK
Home
**
Zone 1
Zone 3
Zone 2
Zone 4
Zone 1
Zone 2
Zone 1
Zone 3
Zone 2
Zone 1
Zone 3
Zone 2
Zone 4
Zone 3
Zone 4
Zone 1
Zone 3
Zone 4
Zone 2
Zone 4
Zone 1
Zone 3
Zone 2
Zone 4
**
Zone 1
Zone 3
Zone 2
Zone 1
Zone 2
Zone 1
Zone 3
Zone 2
Zone 1
Zone 4
Zone 3
Zone 4
Zone 2
Zone 1
Zone 4
Zone 2
Zone 1
Zone 2
Zone 3
Zone 4
Zone 3
Zone 4
Zone 3
Zone 4
AQ254 #3
Zone 1
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 modulating 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 terminal 8, the Open wire to terminal 9, and the Close wire
to terminal 10.
Zone 3
Zone 2
Zone 1
Zone 3
Zone 4
Zone 2
Zone 1
Zone 3
Zone 4
Zone 2
Zone 1
Zone 3
Zone 4
Zone 2
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.
M27810
7 69-1987—02
Page 8
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
Step 3 – Communications Bus Wiring
Connect the communication bus wiring from the Exp Bus Out
(terminals 13 and 14) of the last Zoning Module or Panel
connected to the AQ2000 Series Master Control Panel, to the
Exp.In connection (terminals 11 and 12) of the AQ254.
Connect the communication bus wiring from the Exp. Out
(terminals 13 and 14) of the AQ15400B Control Module to the
Exp Bus In connection (terminals 3 and 4) of the first
Expansion Zoning Panel. Wire any additional Expansion
Zoning Panels connected to the AQ254 in a daisy-chain
fashion, connecting the Exp Bus Out (terminals 13 and 14) of
one Expansion Zoning Panel to the Exp Bus In connection
(terminals 3 and 4) of the next Zoning Expansion Panel.
If more than one AQ254 Control Panel will be installed in this
system, note that the Communication Bus wiring for each
AQ254 Panel must connect to the data bus of the Main
AQ2000 Series Control Panel or the Expansion Zoning Panels
connected to it (i.e. Group A on the AQ network); See Fig. 5 on
page 7 for wiring multiple AQ254 Expansion Control Panels to
an AQ2000 Series network. Any of the connection points
marked as location “
*” in Fig. 5 are acceptable.
Step 4 – Line Voltage Wiring
Next, connect the line voltage equipment – the secondary
system pump (SEC) and, if required, the variable speed
injection pump (Var. Injection) – to the bottom of the
AQ15400B Control Module.
If an optional AUX.Pump or other line voltage device will be
used with the line voltage-rated AUXiliary dry contacts, wire it
in at this point. The AUX.Pump dry contacts are line voltagerated but unpowered. To connect a line voltage auxiliary device
to these contacts, such as a group pump, power the device
from the N and L terminals on the bottom of the AQ1540
Control Module, running the L (hot) lead through the
AUX.Pump contacts and then to the installed device. See
Figure 6 for an example of how to connect a group pump to the
Aux.Pump contacts of the AQ254.If a low voltage device is
connected to the AUX.Pump contacts, the wire insulation must
be suitable for use in line voltage enclosures.
Power
GROUP PUMP
Fig. 6. Wiring of the AUX. Pump line voltage-rated dry
contacts (example shown is a group pump).
Sec.
Var. Injection
Var. Injection Fuse
3A 250V
M27811A
Step 5 – Connection to Expansion Zoning
Panels
Connect the N and L line voltage inputs of the AQ254 (at the
bottom of the AQ10X38 transformer) to the N and L line
voltage inputs on the bottom of the Expansion Zoning Panel
(the AQ10X38 transformer for Valve Zoning Panels) or the
Zoning Module itself (for Pump Zoning Panels). A service
switch should be installed on the hot (L) lead to the distribution
panel.
NOTE: For information related to wiring any connected
Expansion Zoning Panels, see “AQ2000 Series
Expansion Zoning Panels - Product Data sheet” Honeywell literature number 69-1981.
Step 6 – Connection to Line Voltage Power
Finally, provide line voltage power to the AQ254 “Add-ATemperature” Expansion Control Panel by connecting one of
the sets of N and L terminals located on its AQ10X38
transformer to the corresponding N and L terminals on the
AQ10X38 transformer of the AQ2000 Series Main Boiler
Control Panel (e.g. AQ250, AQ25A, AQ251, AQ252, etc.), or
directly to the electrical distribution panel. A service switch
should be installed on the hot (L) lead to the distribution panel.
Switch on power to the AQ254 in order to configure its
operating settings.
IMPORTANT
Be careful not to overload the electrical circuit to
which these Control Panels are connected. Calculate
the potential full load amp draw of all line voltage
equipment combined (system and zone pumps) and if
necessary, split up the Control Panels on more than
one 15A fused circuit.
If the AQ254 and the main AQ2000 Series Control
Panel are connected to separate circuits at the distribution panel, ensure that both circuits are in phase
with each other
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment circuitry.
When line voltage is applied to the AQ254 Control
Panel and the front cover of the Panel is removed,
there is a risk of electrocution. Be careful to avoid
contact with the line voltage (N and L) terminals, either
with your fingers or with metal tools (such as a
screwdriver) when power is applied to the Control
Panel.
69-1987—02 8
Page 9
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
A
A
3 PROGRAM AND CONFIGURE THE
EXPANSION CONTROL PANEL
Control Panel Programming Defaults
Operation of the AQ254 Control Module is set by the menu
selections accessible through the Control Module’s LCD
screen. See “AQ254 – System Programming” on page 9 for
instructions.
The AQ254 Control Panels are shipped from the factory with
pre-defined values for all program settings. These factory
default settings are commonly used by hydronics contractors
across North America. Usually, most of the settings only need
to be checked by the installing contractor to make sure they
are suitable for the job, rather than having to input all the
settings from scratch.
Although these factory default values are suitable for many
installations, Honeywell recommends that they be reviewed,
and changed as necessary, to get optimal performance of the
hydronic system controlled by the AQ2000 Series products.
AQ254 – System Programming
This section describes how to navigate the user interface using
the keypad and LCD display, and how to program the AQ254
Control Panel, which begins on page 10.
NOTES:
1. For information related to configuring Expansion
Zoning Panels connected to the AQ254, see
AQ2000 Series Expansion Zoning Panels - Product Data Honeywell literature number 69-1981.
2. For information related to installing and configuring
the zone thermostats, refer to the Installation guide
for the appropriate AQ1000 thermostat.
Keypad
The AQ254 User Interface consists of an LCD screen (8
characters by 3 rows) and a 3-button keypad for navigating the
menus, as illustrated in Fig. 7.
OK: The OK button of the AQ254 has five uses:
1. To view the System Status page.
• Push the OK button once.
2. To enter the INSTALLER menu to change a
parameter.
• Press and hold this button for 3 seconds to
enter or leave the INSTALLER menu.
3. To enter a sub-menu while in the INSTALLER
menus.
4. To toggle a parameter between two pre-defined
values (applicable when editing a value while in
INSTALLER mode).
5. To enter EDIT mode when changing a parameter’s value or setting.
/ v: The
^
/ v buttons of the AQ254 have three uses while
^
in the INSTALLER menus:
1. To scroll UP/DOWN in the menu screen.
2. To increase/decrease a menu item’s value
(when EDITing a value).
3. To scroll through the possible values of a parameter (applicable when editing a value).
LCD Display
The LCD on the AQ254 Control Panel is used to:
— Monitor system status and performance.
— Select and/or modify control settings for the system.
— Diagnose and troubleshoot system problems.
The layout of the display is logical and simple to navigate. The
information is displayed so that the installer can see at a
glance which group of zones is being controlled by the AQ254
(Group B, C, or D) and the operating temperature of the
Secondary loop. All system information is displayed in simple,
straightforward English for quick system diagnosis. Fig. 7
illustrates the layout and features of the LCD display panel and
keypad.
STATUS OF FLOATING ACTION VALVE OUTPUT
- OPEN = VALVE IS CURRENTLY OPENING
- CLOSE = VALVE IS CURRENTLY CLOSING
GRAPHIC SHOWING THE DEGREE OF
MIXING IN THE SECONDARY LOOP:
# OF BARS INCREASES AS
) THE INJECTION PUMP SPEED
INCREASES.
B) THE VOLTAGE OF THE MODULATING
VALVE SIGNAL INCREASING OR
DECREASING
C) THE ACTUAL MIX TEMPERATURE
APPROACHING THE MAXIMUM MIX
TEMPERATURE
RROWHEADS ABOVE AND BELOW
THE BARS SHOW THE TREND OF THE
MIXED WATER TEMPERATURE
(UP OR DOWN)
STATUS OF LINE VOLTAGE OUTPUTS
(ACTIVE WHEN DISPLAYED ON LCD)
- SECONDARY PUMP
- AUXILIARY DEVICE
Open Close Edit
Mix
WHEN THE WORD “EDIT”
IS DISPLAYED THE “ACTIVE”
MENU ITEM IS CURRENTLY
BEING EDITED.
DISPLAY AREA
SHOWING
SYSTEM STATUS,
MENU OPTIONS, AND
SELECTIONS MADE
UP ARROW
IF DISPLAYED INDICATES THAT OTHER
MENU ITEMS EXIST ABOVE AND CAN
BE VIEWED BY SCROLLING UP
THE “ ” BUTTON
INDICATOR ARROW
INDICATES THE CURRENTLY
SELECTED “ACTIVE” MENU ITEMS
DOWN ARROW
IF DISPLAYED INDICATES THAT OTHER MENU
ITEMS EXIST BELOW AND CAN BE VIEWED BY
SCROLLING DOWN THE “ ” BUTTON
M27814
Fig. 7. LCD display and keypad layout.
9 69-1987—02
Page 10
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
LCD Display Navigation
This section describes how the keypad is used to navigate the
LCD display and menus.
The LCD displays up to three lines of text at a time. For menus
with more than three lines, use the up and down buttons (
v) to scroll through the menu options. As the menu is scrolled
up or down, the indicator arrow (←) shows which menu item is
active.
1. If the active menu item is part of a list of predefined
options (e.g., AUX.PUMP operation), press the OK button to edit this value (the word EDIT displays on the top
right portion of the AQ254 LCD screen) and then press
either the “-“or “+” button to scroll through the available
options. With the indicator arrow (←) beside the chosen
option, press the OK button again to accept this value,
exit EDIT mode, and return to the previous menu. The
option’s value is automatically saved upon exiting EDIT
mode.
2. If the active menu item requires you to define a value
(e.g. a setpoint), position the indicator arrow beside the
menu item and press the OK button to edit this value (the
word EDIT displays on the top right portion of the AQ254
LCD screen) and then press either the “-“or “+” button to
change the value for the menu item until the desired
value is shown. Press the OK button again to accept this
value and return to the previous menu. Again, the
option’s value is automatically saved upon exiting EDIT
mode.
3. If the active menu item leads to a further sub-menu,
pressing the OK displays that sub-menu. Scroll through
this sub-menu to position the indicator arrow (←) beside
the menu item to be reviewed or modified. Press the OK
button to edit this value (the word “EDIT” displays on the
top right portion of the AQ254 LCD screen). Choose one
of the options provided or input the desired value for the
menu item. Press the OK button again and your selection is saved.
4. To define or modify another item within the same menu,
scroll the UP and DOWN buttons (
tor arrow (←) is beside the desired option and repeat
Steps 1 through 3.
To move back (up) one level within a menu, scroll to the bottom
of the current menu list and – with the active indicator arrow
(←) beside the EXIT option, press the OK button.
To leave INSTALLER MODE and return to the Home Page
display screen, press and hold the OK button for 3 seconds
from any menu location within the INSTALLER menu.
or v) until the indica-
^
or
^
HOME PAGE DISPLAY
The Home Page is the default view displayed on the AQ254
Control Panel's LCD screen (refer to “Home Page and System
Status Page” on page 14 in the “Appendix” ).
The Home Page together with the System Status Page provide
a service contractor extensive diagnostic information for
troubleshooting the installation.
Programming the AQ254
Program the AQ254 by using the keypad and LCD display to
select parameters from the Installer menu. Refer to Fig. 7 on
page 9 for an illustration of the LCD screen and keypad.
NOTE: The figures in “Installer Menu Structure” on page 19
provide a graphical layout of the AQ254’s Installer
menu.
When a new AQ2000 component is connected on the
AQUATROL network, it is seamlessly integrated in the system
after a few seconds. If one or more components are
disconnected or stop providing data to the network, a message
will appear on the System Status page of the AQ254's LCD of
the main AQ2000 Control Panel until the fault is corrected.
System Status Page
The System Status Page is intended for use by the building
owner to view the system state and status.
NOTE: If there are any problems with the system’s operation,
the AQ254 displays error codes on the System Status
Page display of the LCD panel. For details on these,
refer to “Troubleshooting” on page 13.
Refer to Table 2 on page 14 in the “Appendix” for all of the
possible status messages for the AQ254 Expansion Control
Panel, the factory default values and permissible ranges for
each option, and a brief description of each setting.
Installer Menu
The Installer Menu is used to:
— Set up and modify the Loop and Mixing settings.
— Access the Test and Purge functions to facilitate quick and
simple commissioning of the system.
TO ACCESS THE INSTALLER MENU:
Press and hold the OK button for 3 seconds.
Refer to Table 3 on page 15 in the “Appendix” for all of the
Installer Menu options for the Control Panel, the factory default
values and permissible ranges for each option, and a brief
description of how each setting affects the AQ254’s operation.
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AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
4 TEST AND CHECK OUT THE
INSTALLATION
Startup
IMPORTANT
Apply power to the AQ254 Control Panel only after
of the AQ2000 SERIES components (Control Panel,
thermostats, sensors, Zoning Panels) have been
connected to the other equipment in the hydronic
heating system (boiler, zone valves or pumps, DHW,
Aquastat
When powered, the AQ254 Control Panel begins its start-up
routine, establishing communication with all other AQ2000
Series components on the AQUATROL network.
®
, etc.).
Test
The TEST feature enables the installer to checkout all of the
system’s outputs, sensors, and zone equipment as part of
system commissioning (Checkout).
The TEST operation can be accessed via the TEST menu in
the INSTALLER mode of either the main AQ2000 Series
Control Panel or the AQ254 Expansion Control Panel. To begin
testing the installation, position the indicator arrow (←) beside
the equipment group to be tested [OUTPUTS, SENSORS, or
ZONES] and press the OK button.
Test Outputs
• When TEST OUTPUTS is selected, the AQ254 LCD
displays a list of all outputs that can be tested. To select an
output to test, position the indicator arrow (←) beside that
output and press the OK button to activate the output's
relay. As each output is activated, a word icon for that
output displays at the top or bottom of the LCD display
(refer to Fig. 7 on page 9). The TEST routine activates the
output relay until the OK button is pressed to turn off that
output.
• To test additional outputs, navigate the list using the Up or
Down arrow (
that output and press the OK button to begin testing. Press
the OK button to de-activate the output relay and stop the
test.
• When finished testing the outputs, scroll to the bottom of the
TEST OUTPUTS menu to the EXIT menu item and press
OK to move up one menu level to the main TEST menu.
NOTE: Any combination of outputs can be activated at the
same time when testing the outputs.
Test Sensors
Scroll down to position the indicator arrow beside the SENSOR
menu item and press OK.
When SENSOR is selected, the AQ254 LCD displays the
temperature that the SECONDARY sensor is measuring. If the
sensor is malfunctioning or is not properly connected to the
AQUATROL network, the value “- -” displays beside the SEC
item on the LCD screen, instead of the mixed loop
temperature. If the sensor reports a temperature that is
illogical, investigate further by referring to “Troubleshooting” on
page 13.
or v), position the indicator arrow (←)
^
all
beside
To leave the TEST SENSOR menu, scroll down to the EXIT
menu item and press OK to move up one menu level to the
main TEST menu.
Test Zones
Scroll down to position the indicator arrow beside the ZONES
menu item and press OK.
• When ZONES is selected, the Installer can test all space
heating zones connected to the AQ254 simultaneously or
individually.
• If zones are tested simultaneously (ALL), all zone
equipment is energized. There is a start delay of 1/10th of a
second between each pump or valve to minimize the effect
of inrush currents from the devices’ motors.
• To test zones individually, position the indicator arrow (←)
beside a selected zone and press the OK button to energize
it. Press the OK button again to de-energize it. As each
zone is tested, the Status LED on the Zoning Module
associated with that zone is illuminated. To test additional
zones, position the indicator arrow (←)
be tested, press the OK button to energize the zone’s pump
or valve and then press the OK button again to de-energize
it.
• When finished testing the zones, scroll down to the EXIT
menu item and press and hold the OK button for 3 seconds
to return to the Home Page display.
beside the zone to
Checkout
1. In Installer mode, disable the Warm Weather Shut Down
(WWSD) temperature setting on the Main AQ2000
Series Control Panel by increasing the WWSD setting to
100°F (37°C). This way, the WWSD will not interfere with
the zone operation during checkout.
The WWSD setting can be found in the INSTALLER
mode of the AQ25A, AQ251, or AQ252 in the
“INSTALLER MENU > EQUIPMENT SETUP >
BOILER SETTINGS menu.
NOTE: Disabling WWSD does not apply to systems
where an AQ250 is the Main AQ2000 Series
Control Panel, as the AQ250 does not have the
option of connecting an outdoor sensor to it.
2. Turn down the DHW AQUASTAT, if present, to avoid
interfering with space heating control operation.
3. Turn up the set point of one of the AQ254’s zone thermostats that is associated with the SECondary mixed water
loop.
3.1 The zone valve or pump associated with that zone
will turn on.
3.2 The Boiler T-T relay of the Main AQ2000 Series
Control Panel is activated (Boiler displays in the
DEMANDS section of the Control Module’s LCD
screen).
3.3 The SECondary pump connected to the AQ254 is
energized (SEC displays in the OUTPUTS section of
the AQ254’s LCD screen).
3.4 The Boiler pump relay is activated (PRIMary displays
in the OUTPUTS section of the LCD screen).
3.5 The mixing device, injection pump or mixing valve, is
energized and the word INJ (for an injection pump)
or OPEN (for a mixing valve) displays on the
AQ254’s LCD screen.
3.6 Depending on the settings for the AUX.PUMP (line
voltage-rated dry contacts) on the AQ254, these
contacts may also close, and if so, the word AUX
displays in the OUTPUTS section of the LCD screen.
11 69-1987—02
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AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
4. Turn down the set point of the AQ1000 zone thermostat.
The zone valve or pump associated with that zone will
turn off.
5. The Boiler T-T, SEConday pump, and Boiler pump relay
outputs will be de-activated.
Repeat steps 2-5 for all zones associated with the AQ254's
mixed temperature loop.
6. Turn up the DHW AQUASTAT to simulate a call for
domestic hot water.
6.1 If the DHW device is a pump, the DHW relay output
will be energized immediately. The Boiler pump relay
will remain off.
6.2 If the DHW device is a valve, the Boiler pump relay
will come on after a delay to allow the zone valve to
fully open. This delay is installer-defined from the
EQUIPMENT SETUP>ZONING>TIME TO OPEN
menu of the Main AQ2000 Series Control Panel.
6.3 Turn up the set point of one of the AQ1000 zone
thermostats connected to the AQ254.
6.3.1 If the DHW relay is configured to control a
pump, and DHW Priority is selected, the
Boiler and the associated zone pumps relay
will remain off.
6.3.2 If the DHW relay is configured to control a
valve, and DHW Priority is selected, the Boiler
pump will be activated after a delay for the
DHW zone valve to open, but the associated
zone relays will remain off.
6.3.3 If DHW Priority is disabled, space heating
zone pumps and valves will operate even
during a call for DHW.
7. Turn down the DHW AQUASTAT to end the call for
domestic hot water. Space heating operation should continue (if DHW priority is disabled) or resume (if DHW priority is enabled).
8. Repeat steps 3 through 7 for all space heating zones
connected to an AQ254.
5 PURGE AIR FROM ALL SYSTEM
AND ZONE PIPING
The PURGE operation on the AQ254 Expansion Control Panel
allows the installer to purge all zones (loops) sequentially, or
each zone individually, for a period of time selected in the
TEST > PURGE menu. Purge time can be adjusted in
increments of one minute, up to a maximum of 30 minutes per
loop to be purged. After using the AQ254’s menus to select
which loops to purge (ALL loops, or an individual loop) and for
how long, position the indicator arrow (←)
option and press the OK button. The START display will
change to STOP and the AQ254 display will begin counting
down the time remaining for the purge cycle.
Purging All Loops
When the purge time has elapsed for the first loop, the control
will proceed to subsequent loops and perform the purge
operation on each of them. After all selected loops have been
purged, the display shows COMPLETE.
beside the START
Note that only the loops controlled by the AQ254 are purged.
This means that:
1. Zones that are programmed to use water on the PRImary (boiler) loop will have their pump running while the
Boiler pump (on the Main AQ2000 Series Control Panel)
is not running;
2. Other AQ254 loops will not have been purged when the
COMPLETE indication displays.
To remedy to this, it is preferable to use the Main AQ2000
Series Control Panel’s PURGE operation, which has the
overall system control to achieve an efficient PURGE routine
for all zones
6 DOCUMENT AND KEEP A RECORD
OF ALL SYSTEM SETTINGS
After the hydronic installation with the AQ254 Control Panel
has been set up and is operating properly, it’s important to
document all the system settings for future reference.
Job Records
All AQ2000 Series Panels are shipped with Installation Job
Records for documenting these settings. These should be filled
out completely and saved in the Installing Contractor’s files.
Save Feature
In addition to the hardcopy Installation Job Records, the
AQ254 Control Panel has a convenient Save feature that
allows the installing contractor to save the specific equipment
setting for this installation in the AQ254’s memory for future
recall, in case the system’s settings are inadvertently changed.
This feature is found in the SETUP > SAVE menu of the
AQ254.
There are three levels of settings in the AQ254’s memory –
CURRENT, FACTORY and SETUP.
• CURRENT settings are the settings that are currently
displayed in any of the menus and are the settings that the
AQ254 uses to operate. Any time a value is changed in any
of the menus, the CURRENT settings are changed and
these new settings are instantly used by the AQ254 Control
Panel.
• FACTO RY settings are the default values loaded at the
factory and are the starting point for programming the
AQ254. These values are permanently stored in memory
and cannot be over-written or erased. The AQ254 can be
restored to factory settings through the FACTORY option in
the SAVE / RESTORE sub-menu. A warning prompt,
RESTORE FACTORY—ARE YOU SURE?, displays and
YES or NO must be chosen before proceeding. If YES is
selected, the FACTORY settings are copied to the AQ254’s
CURRENT settings and the Control Panel begins to operate
with these values immediately.
• SETUP settings are the specific settings for this installation
which an installer has saved after the AQ254 is set up and
operating well. These are saved for future recall, in case the
system’s settings are inadvertently changed.
— To save settings for the first time, navigate to the
SETUP > SAVE menu. Position the indicator arrow (←)
beside SAVE and press OK. This saves current system
settings to the SETUP values.
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AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
— To retrieve the SETUP values at any time in the future,
return to the SETUP > RESTORE menu and select
RESTORE to load those values as the CURRENT settings. The system will now operate according to these
retrieved settings.
— If the current settings are modified after a RESTORE
operation is performed, choosing SAVE subsequently
will save these new settings, overwriting the previous
SAVE settings stored in the AQ254's memory.
CAUTION
If you change any system settings after a
RESTORE SETUP operation, you change the
current settings that the AQ254 uses as its basis of
operation.
NOTE: There are two types of equipment settings used by
the AQ2000 network to control the operation of the
heating system: Zone Settings and System Settings.
a. When using AQ1000 thermostats, Zone Settings
are designed to be adjustable by the User or the
Installer and are stored in the faceplate
AQ1000 thermostat. If the faceplates of two
AQ1000 thermostats are switched, the settings
(setpoints, zone minimum, zone maximum, etc.)
will also be switched. These settings are NOT
SAVED with the SETUP > SAVE operation.
b. System Settings are designed to be adjustable
only
by the system installer and are stored in the
AQ2000 Control Modules (AQ250, AQ251,
AQ25A, AQ252, AQ254, etc.). These are the settings that are saved with the SETUP > SAVE
operation.
of the
TROUBLESHOOTING
The following information helps the installer correctly identify
system problems, making troubleshooting much faster.
Table 1 describes the possible status notices and error
messages that can be communicated.
System Status Information
To aid in troubleshooting hydronic systems controlled by an
AQ254, the operational status of the system is shown on the
System Status page. Status notices and error messages
display as appropriate, i.e., only those that are pertinent to the
system’s current operation will be displayed.
See Table 2 on page 14 for a complete list of system status
messages. The System Status page is available from the
Home Page by pushing the OK button once.
This diagnostic information is very valuable and the System
Status page is the first place a contractor should look for
information when troubleshooting system problems.
Power Disruption
The system settings of the AQ254 are stored in non-volatile
memory and are updated as they are changed. When a power
disruption occurs, the current system configuration is retained
in memory. When power is restored, the AQ254 Expansion
Control Panel enters auto-detection mode, reads its
previously-stored settings and all AQUATROL network
components are initialized according to their saved
parameters.
NOTE: Power disruptions have no impact on the AQ254’s
saved settings, as they are stored in non-volatile
memory and will remain saved indefinitely.
Table 1. LCD Status Notices and Error Messages.
LCD Display Meaning
NO GRP A No network communication with the Main AQ2000 Series Control Panel (AQ250, AQ25A,
AQ251, AQ252) is available. Check the wiring of the Exp. IN bus connection.
NO ZONES No zones are detected on the AQ254’s sub-network.
NO SENSR No secondary sensor has been connected to the AQ254.
IDLE No activity on the secondary (mixed) loop and/or the zones associated with the AQ254.
DMND:XX Percentage “XX” of the heating demand for the secondary (mixed) loop and/or the zones
associated with the AQ254. The example show a demand of 100%.
13 69-1987—02
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AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
APPENDIX
The appendix provides AQ254 Expansion Control Panel User
interface information for the:
— The Home Page and System Status Page
HOME PAGE
LCD DISPLAY
B LOOP
OUT: 30
SEC: 100
KEYPAD
— Installer Programming menu
— Programming menu structure. See page 19.
Home Page and System Status Page
The Home Page is the default display for the control panel. It
provides general system information.
Press the OK button on the keypad to display the System
Status Page.
SYSTEM STATUS PAGE
1
NO LINE INDICATES NO LINE VOLTAGE.
NO GRP A
NO ZONES
NO SENSR
WWSD
NO DMND
IN PURGE
NO LINE
MIX IDLE
MIX HEAT
MIX PURG
MIX OFF
INJ:000%
1
M27812
Fig. 8. Home Page display, System Status Page display,
and keypad.
.
Table 2. Home Page and System Status Page.
Menu Option Range Description
HOME Page
X LOOP B, C, or D Defines whether this AQ254 is the first (B), second (C), or third (D) AQ254
Expansion Control Panel connected to the main AQ2000 Series Control Panel.
OUT: Displays the outdoor temperature.
SEC: Displays the temperature measured by the secondary mixed water sensor.
TGT: Displays the mixed water temperature target calculated by the AQ254 controller.
SYSTEM STATUS
a
NO GRP A No network communication with the Main AQ2000 Series Control Panel (AQ250,
AQ25A, AQ251, AQ252) is available. Check the wiring of the Exp. IN connection.
NO ZONES No zones are detected on the AQ254’s sub-network. Check the wiring of the Exp.
OUT connection.
NO SENSR No secondary sensor has been connected to the AQ254
WWSD The system is in Warm Weather Shutdown mode; calls for heat from the space
heating zones connected to the AQ254 will not be served.
NO DMND No activity on the secondary (mixed) loop and/or the zones associated with the
AQ254
IN PURGE Purge operation is active somewhere on the AQ network.
NO LINE VOLTAGE No line voltage has been detected on the N and L (line voltage input) terminals on
the AQ254 Expansion Control Module.
MIX IDLE MIX items display only one at a time. They indicate whether the AQ254 mixing
MIX HEAT
MIX PURG
MIX OFF
equipment is de-energized because the target temperature has been reached
while an AQ254 zone is still being served (MIX IDLE), actively drawing hot water
from the PRImary loop (MIX HEAT), in purge operation following a heating cycle
(MIX PURG), or OFF.
INJ: XX% Injection percentage displays from 0% to 100%.
a
Status notices and error messages display as appropriate. Only those that are pertinent to the system’s current operation are displayed.
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AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
Installer Programming Menu
The Installer Menu allows you to set up and modify system
settings that typically would be adjusted by a trained installer.
These include settings such as mixing temperatures limits,
injection, and valve operation.
System statistics, testing, and purging are also available from
the Installer Menu.
Illustrations of the complete Installer Menu begin on page 19.
Table 3. Installer Menu.
EQUIPMENT SETUP
Menu Option Range
MIXING Settings that the AQ254 uses for Secondary loop operation
MIX HIGH TEMP: - -
MIX LOW TEMP: - -
RESET: AUTO / OUTDOOR / LOAD /
DESIGN TEMP: - -
10V MOD: DISABLE /
INJECT.: ENABLE / DISABLE ENABLE
MIX.VLV: DISABLE / ENABLE DISABLE
VLV OPEN TIME: 5 to 230 seconds 160
VLV ACTION: DIRECT / REVERSE DIRECT Available only when MIX.VLV = ENABLE
- EXIT - n/a n/a Exits this sub-menu and returns to the Installer menu.
PRI/SEC Identifies the heating water loop that each space heating zone is supplied by: the primary
ALL PRI n/a n/a Applicable only to the 16 zones of this AQ254 group
ALL SEC n/a n/a Applicable only to the 16 zones of this AQ254 group
B-01:
...
D-16:
- EXIT - n/a n/a Exits this sub-menu and returns to the Installer menu.
80°F to 210°F (27°C to 99°C)
35°F to 150°F (2°C to 66°C)
NONE
70°F to 210°F (21°C to 99°C)
0V to 10V /
2V to 10V
boiler loop (PRI) or the secondary mixed loop (SEC).
Displays the PRI/SEC sub-menu with the following selections for all or individual zones:
SEC / PRI SEC Individual zone selection:
To access the Installer Menu, press and hold the OK button for
3 seconds.
NOTE: To exit Installer Mode, select the Installer Exit menu
Factory
Default Description
140°F
(60°C)
95°F
(35°C)
AUTO Selects the calculation method (algorithm) that the
120°F
(49°C)
DISABLE Produces voltage on the 10 Vdc low voltage terminals
(seconds)
option.
The maximum temperature that the control can use as
a target for the secondary loop supply water. The MIX
HIGH TEMP cannot be set below the MIX LOW
TEMP setting.
• “- -” means Off (not used).
The minimum temperature that the control can use as
a target for the secondary loop supply water. The MIX
LOW TEMP cannot be set above the MIX HIGH
TEMP setting.
• “- -” means Off (not used).
control uses to set the target temperature for the
secondary loop supply water.
AUTO option applies the same reset method selected
for the main AQ2000 Series Control Panel.
The supply water temperature required in the mixed
temperature SECondary loop when the outdoor
temperature is at the OUTDOOR LOW temperature.
• “- -” means Off (not used).
(6 and 7) according to the setting chosen.
Available only when MIX.VLV = ENABLE
of zones (B, C, or D).
of zones (B, C, or D).
B-01: PRI/SEC
B-02: PRI/SEC
…
D-16: PRI/SEC
15 69-1987—02
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AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
Table 3. Installer Menu. (Continued)
EQUIPMENT SETUP
Factory
Menu Option Range
Default Description
AUX Settings which the AQ252 uses to control the closure of the AUX.OUT dry contacts.
AUX: ZONE OPN / BOILER /
GROUP
ZONE OPN Based on the setting chosen, the AQ252 closes the
AUX OUT dry contact terminals when:
• ZONE OPN: The end switch of any zone valve on
this AQ254’s group of zones closes or a zone pump
energizes.
• BOILER: The boiler pump energizes.
• GROUP: Any of the thermostats in a Group of zones
(identified by the Zoning Module's DIP switch #7
[AUX] being switched to YES) energize.
SETUP Options for saving settings or restoring previously-saved settings.
SAVE n/a n/a Enables installer to SAVE system settings once the
system has been set up and is working well; Designed
to facilitate quick recovery to proper system operation
in the event of inadvertently changing control settings
(e.g., tampering with the system settings by an
inexperienced user).
RESTORE n/a n/a Selecting this option restores all settings to those
saved by the Installer with the SAVE operation.
RESTORE is only displayed as a menu option if
installer settings have previously been saved using
the SAVE menu item.
• Only displays if the installer has previously saved
the (non-factory default) settings using the SAVE
feature.
FACTORY n/a n/a Selecting this option restores all settings to their
factory defaults.
- EXIT - n/a n/a Exits this sub-menu and returns to the Installer menu.
TEST Tests the outputs, sensor, and zones connected to the AQ254 to ensure correct operation,
and provides the Purge feature.
OUTPUTS Tests the individual system outputs to ensure correct operation.
SEC PUMP ON / OFF OFF Energizes / de-energizes the line voltage terminals (9
and 10) marked Sec. when switched to ON / OFF
respectively.
INJ PUMP 0% to 100% 0% Produces a variable voltage on the Var.Injection line
voltage terminals, according to the setting chosen (0%
to 100%) in increments of 10%.
MIX VLV OFF / OPEN ON / CLOSE ON OFF Energizes the Open terminal (9) or the Close terminal
(10), as selected, of the Motorized Mixing Valve to
open or close the valve.
10V MOD 0V to 10V 0V Produces voltage on the 10 Vdc low voltage terminals
(17 and 18), according to the setting chosen (0V to
10V), in increments of 1V.
AUX ON / OFF
(close / open)
OFF
(open)
Closes / opens the line voltage rated dry contacts
marked Aux. when switched to ON / OFF,
respectively.
SEC PUMP ON / OFF OFF Energizes / de-energizes the line voltage terminals
marked Sec. when switched to ON / OFF respectively.
EXIT n/a n/a Exits this sub-menu and returns to the Installer menu.
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AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
Table 3. Installer Menu. (Continued)
EQUIPMENT SETUP
Factory
Menu Option Range
Default Description
TEST (continued)
SENSOR Tests the secondary mixed loop temperature sensor to ensure correct operation
SEC - -
LO
-49° to 257°F (-45° to 125°C)
HI
n/a Displays the temperature measured by the secondary
mixed water sensor.
• “- -” means sensor is disconnected
• LO means temperature reading is below -49°F (-
45°C)
• HI means temperature reading is above 257°F
(125°C)
EXIT n/a n/a Exits this sub-menu and returns to the Installer menu.
ZONES Tests the zone equipment individually, or sequentially, to ensure correct operation
ALL n/a OFF Sequentially energizes / de-energizes all zones
connected to the AQ254 group of zones.
• 0 displays when the AQ254 Control Module has
confirmation that the zone’s pump is de-energized
or its valve is fully closed.
• 1 displays when the AQ254 Control Module has
confirmation that the zone’s pump is energized or
its valve is fully open.
In the case of pump zoning, the 1 displays no more
than 5 seconds after the activation of the relay. In the
case of valve zoning, the 1 displays either when the
zone valve operating time (defined in EQUIPMENT
SETUP > ZONING > ZONE VALVES TIME TO OPEN
on the main AQ2000 Series Control Panel) has
elapsed (AQ1554P2) or when the valve’s end switch
is closed (AQ1574V4).
ZONE B-1 0/1
…
ZONE B-16 0/1
0/1 0 Energizes / de-energizes each zone individually.
• 0 displays when the AQ254 Control Module has
confirmation that the zone’s pump is de-energized
or its valve is fully closed.
• 1 displays when the AQ254 Control Module has
confirmation that the zone’s pump is energized or
its valve is fully open.
EXIT n/a n/a Exits this sub-menu and returns to the Installer menu.
PURGE Purges all (or individual) zones for the period of time selected in the PURGE TIME menu
option
PURGE TIME 1 to 30
(minutes)
PURGE PURG ALL / DHW /
PURGE 1 … PURGE 16
START PURGE START PURGE /
5:00
Duration of purge for each zone selected.
(minutes)
ALL Installer selects which zones to purge (all, only DHW,
or individual zones).
n/a Starts and Stops purge operation.
STOP PURGE
PURGE OFF WAIT VALVE /
PURGE COMPLETE
n/a Indicates status of the system during a Purge
operation.
Displays only if START PURGE is active.
EXIT n/a n/a Exits this sub-menu and returns to the Installer menu.
17 69-1987—02
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AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
Table 3. Installer Menu. (Continued)
EQUIPMENT SETUP
Factory
Menu Option Range
Default Description
STATISTICS Displays the summary activity (hours of operation or cycles since last reset)
LAST RST Max. 24,855 days (68 years) 0 Number of days since last reset.
AUX.PMP: Maximum of 596,523 hours
0H Hours of operation of the relay since last reset.
(68 years)
SEC PMP: Maximum of 596,523 hours
0H Hours of operation of the relay since last reset.
(68 years)
INJ PMP: Maximum of 596,523 hours
0H Hours of operation of the relay since last reset.
(68 years)
AUX OUT
ACTIV
MIX.VLV. OP.
CYCLE
MIX.VLV. CL.
CYCLE
RESET ?
ARE YOU SURE?
Maximum of 596,523 hours
0H Hours of operation of the relay since last reset.
(68 years)
Maximum of 10,000,000
0 Displays number of valve open cycles since last reset.
cycles
Maximum of 10,000,000
cycles
0 Displays number of valve close cycles since last
reset.
YES / NO NO Selecting this item resets all of the summary and zone
activity values to zero.
- EXIT - Exits the Installer menu and returns to the Home Page.
69-1987—02 18
Page 19
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
Installer Menu Structure
To display the Installer Menu, press and hold the OK button for
3 seconds. Fig. 9 illustrates all possible Installer Menu
selections.
INSTALLER MODE
ENTER
INSTALLER
MODE? NO
YES
INSTALLER MENU
LOOP: B
MIXING
PRI/SEC
AUX
SETUP
TEST
STATS
-EXIT-
1
MIXING
MIX HIGH
TEMP: 140
MIX LOW
TEMP: 95
RESET: AUTO
DESIGN
TEMP: 120
10V MOD: DISABLE
INJECT.: ENABLE
MIX.VLV: DISABLE
VLV OPEN
TIME: 160
VALVE
ACTION: DIRECT
-EXIT-
PRI/SEC
ALL PRI
ALL SEC
B01: SEC
...
D16: SEC
-EXIT-
AUX
AUX: ZONE OPN
-EXIT-
SETUP
SAVE
RESTORE
FACTORY
-EXIT-
TEST
OUTPUTS: - SEC PUMP / INJ PUMP / MIX VLV / 10V MOD / AUX / SEC PUMP / EXIT
SENSOR: - SEC / EXIT
ZONES: - SEC / ZONE B01 ... ZONE B16 / EXIT
PURGE: - PURGE TIME / PURGE / START PURGE / PURGE OFF / EXIT
-EXIT-
STATS
LAST RST
100
AUX.PMP:
1,000H
SEC.PMP:
1,000H
INJ.PMP:
1,000H
MIX.VLV.
OP.CYCLE
1200
MIX.VLV.
CL.CYCLE
1200
RESET ?
ARE YOU SURE? NO
-EXIT-
2
3
3
1
THE SYMBOLS INDICATE ADDITIONAL SELECTIONS ARE POSSIBLE.
THE FACTORY DEFAULT VALUES ARE SHOWN.
A VALUE OF “- -” INDICATES THE ITEM IS DISABLED OR NOT USED.
2
TEMPERATURE VALUES ARE SHOWN IN DEGREES FAHRENHEIT,
WHICH IS THE FACTORY DEFAULT TEMPERATURE UNIT.
3
VALVE OPEN TIME AND VALVE ACTION DISPLAY
ONLY IF MIX.VLV = ENABLE.
M27813
Fig. 9. Installer Menu Structure.
19 69-1987—02
Page 20
AQ25400B “ADD-A-TEMPERATURE” EXPANSION CONTROL PANEL
AQUATROL® is a registered trademark of Honeywell International Inc.
Aquastat® is a registered trademark of Honeywell International Inc.
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9
customer.honeywell.com
® U.S. Registered Trademark
© 2009 Honeywell International Inc.
69-1987—02 M.S. Rev. 10-09
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