Honeywell Y9520Z Sundial RF Pack 5 Installation Guide
- June 13, 2024
- Honeywell
Table of Contents
Y9520Z Sundial RF Pack 5
Product Information:
-
Product Name: Wireless Control Solution for Heating
Systems -
Model Number: 50047644-006 A
-
Application: This pack provides a wireless control solution for
adding 2 wireless room thermostats to heating systems, in order to
split the heating system into 2 separate zones and ensure
compliance with the latest Building Regulations. -
Pack Contents & Product Descriptions:
-
1 x ST9520C1005 – Wireless enabled 7 day programmer with 2
output control relays for switching boilers, pumps, and zone valves
in heating systems. It requires permanent mains 230Vac power. -
2 x DTS92E1020 – Wireless digital room thermostat with
energy-saving ECO function. It operates on 2 x AA alkaline
batteries, giving a battery life of at least 2 years under typical
operating conditions. -
2 x Table Stand for DT92E (optional)
-
-
Other Resideo products, not supplied in this pack, may be
required for a complete installation, depending on the application.
For example, BDR91T1004 relay box. -
System Operation: The DT92E and ST9520C use 2-way communication
on an 868MHz radio frequency (RF) band to control the heating
system. The ST9520C operates as the control hub of the system, and
the DT92E thermostats can be positioned in suitable locations in
the 2 separate heating zones. -
Compatibility: This functionality is ideal for upgrading
existing systems without a room thermostat to ensure compliance
with Building Regulations. It is also ideal for refurbished
systems, where running mains cable from the programmer to the
thermostats and back to the boiler is difficult or
impractical. -
Connection Options: There are various options for how to
connect to the boiler. The simplest is a direct 230Vac connection.
If the boiler supports OpenTherm communications technology, it is
possible to control it using a 2-wire connection from the ST9520C
OpenTherm terminals. If the boiler is located remotely, it is
possible to send the switching signal from the ST9520C to a remote
located BDR91T relay box.
Product Usage Instructions:
-
Installation Notes:
- Installation Sequence: Step by Step
- The RF link between the Room Thermostats (DT92E) and the Zone
Programmer (ST9520C) in Resideo system packs is pre-configured at
the factory, and therefore all units should be installed at the
same site.
-
Installing the ST9520C Programmer:
- Mounting ST9520C:
-
Choose a suitable location to mount the ST9520C
programmer. -
Ensure that the mounting surface is solid and can support the
weight of the programmer. -
Fix the programmer securely to the mounting surface using
suitable screws or fixings.
-
ST9520C Mounting options: The ST9520C programmer can be mounted
on a wall or other suitable surface. -
Wiring ST9520C:
-
Connect the necessary wiring (e.g., mains power supply, boiler
connections, pump connections, and zone valve connections)
according to the system requirements and the provided wiring
diagram. -
Ensure that all connections are secure and properly
insulated.
- ST9520C Final Assembly:
-
Double-check all the wiring connections.
-
Ensure that the programmer is securely mounted and all
components are properly aligned. -
Tighten any loose screws or fixings if necessary.
50047644-006 A
Y9520Z Sundial RF² Pack 5
INSTALLATION INSTRUCTIONS
Application
This pack provides a wireless control solution for adding 2 wireless room
thermostats to heating systems, in order to split the heating system into 2
separate zones and ensure compliance with the latest Building Regulations.
Pack Contents & Product Descriptions
1 x ST9520C1005
Wireless enabled 7 day programmer with 2 output control relays for switching boilers, pumps and zone valves in heating systems. It requires permanent mains 230Vac power.
2 x DTS92E1020
Wireless digital room thermostat with energy saving ECO function. It operates on 2 x AA alkaline batteries, giving a battery life of at least 2 years under typical operating conditions.
2 x table stand for DT92E (optional)
Other Resideo products, not supplied in this pack, may be required for a
complete installation, depending on the application. For example
BDR91T1004 relay box. See Schematic System Layouts (below).
This document is to be left with the user
Schematic System Layouts
95-1 Wireless room thermostats, wired valves, wired TPI boiler control
2-way wireless communication
Sundial RF² is a registered trademark of Resideo Inc.
OpenTherm® communication
System Operation
DT92E and ST9520C use 2-way communication on an 868MHz radio frequency (RF)
band to control the heating system.
ST9520C operates as the control hub of the system and the DT92E thermostats
are free to be positioned in suitable locations in the 2 separate heating
zones.
This functionality is ideal for upgrading existing systems without a room
thermostat to ensure compliance with Building Regulations. It is also ideal
for refurbished systems, where running mains cable from the programmer to the
thermostats and back to the boiler is difficult or impractical.
There are various options for how to connect to the boiler. The simplest is a
direct 230Vac connection. If the boiler supports OpenTherm communications
technology, it is possible to control it using a 2-wire connection from the
ST9520C OpenTherm terminals. If the boiler is located remotely, it is possible
to send the switching signal from the ST9520C to a remote located BDR91T relay
box.
95-2 Wireless room thermostats, wired valves, OpenTherm 2 wire boiler control
ST9520C
ZONE 1
DT92E
ST9520C
ZONE 1
DT92E
Hot Water
Junction Box
V4043H
Radiator(s)
Hot Water
OpenTherm® 2-wire connection
Boiler
Junction Box
V4043H
Radiator(s)
ZONE 2
DT92E
ZONE 2
DT92E
V4043H
V4043H
Radiator(s)
Radiator(s)
95-3 Wireless room thermostats, wired valves, wireless TPI boiler control
BDR91T
Hot Water Boiler
ST9520C
Junction Box
ZONE 1
V4043H Radiator(s)
ZONE 2
V4043H Radiator(s)
DT92E DT92E
1
Installation Notes
Installation Sequence: Step by Step
The RF link between the Room Thermostats (DT92E) and the Zone Programmer
(ST9520C) in Resideo system packs is pre-configured at the factory and
therefore all units should be installed at the same site.
· Ifproductsfromindividualsystempacksareseparated,ormixed with other pre-
configured system packs during installation, or a faulty unit is being
replaced, the desired units must be specially configured to allow them to
communicate with each other. This process is called Binding. Please refer to
section 6 Binding / Rebinding Procedure.
· DT92E or ST9520C will not communicate with other RF products that use
different frequencies or communications protocols.
· TheDT92Eroomthermostatrequiresnopowersourceotherthan the batteries provided.
· The ST9520C Programmer requires a permanent 230V~ supply.
· The ST9520C Programmer should be installed and powered up before commencing
installation on the DT92E room thermostats.
· IfcontrollingtheboilerviaanOpenThermconnection,theST9520C must be configured
to provide this form of output (see Section 4 System Configuration)
· Iftheboilerisbeingswitchedusingaremoterelaybox(BDR91T) the relay box is not
supplied in this pack and will require to be bound to ST9520C (see Section 6
Binding / Re-binding Procedure)
Section
Page
1 INSTALLING THE ST9520C PROGRAMMER
1.1 Mounting ST9520C ………………………………………………………… 3
1.2 ST9520C Mounting options …………………………………………….. 3
1.3 Wiring ST9520C …………………………………………………………….. 3
1.4 ST9520C Final Assembly………………………………………………… 3
1.5 ST9520C Internal Wiring…………………………………………………. 4
1.6 Wiring Diagrams ……………………………………………………………. 4
1.7 Replacing Other Time Controls ……………………………………….. 5
1.8 Powering Up ST9520C …………………………………………………… 5
2 INSTALLING THE DT92E ROOM THERMOSTAT
2.1 Locating DT92E …………………………………………………………….. 6 2.2 Powering Up DT92E
………………………………………………………. 6 2.3 DT92E Signal Strength Test …………………………………………….. 6
2.4 Mounting DT92E ……………………………………………………………. 7 2.5 Separating DT92E from its
Mounting Plate………………………… 7
3 INSTALLING THE BDR91T WIRELESS RELAY BOX
3.1 Locating the BDR91T……………………………………………………… 8 3.2 BDR91T Mounting Options
……………………………………………… 8 3.3 Wiring BDR91T ……………………………………………………………… 8
3.4 BDR91T Final Assembly …………………………………………………. 8
RF Signal Propagation
Within a typical house two RF products should communicate reliably within a
30m range. It is important to take into consideration that walls and ceilings
will reduce the RF signal. The strength of the RF signal reaching the
Programmer depends on the number of walls and ceilings separating it from the
room thermostat, as well as the building construction – the diagram below
illustrates an example of typical signal strength reduction. Walls and
ceilings reinforced with steel or plasterboard walls lined with metal foil
reduce the RF signal significantly more.
4 SYSTEM CONFIGURATION: ST9520C
4.1 ST9520C Installer Modes………………………………………………… 9 4.2 Boiler Service Reminder /
Shut-down Feature……………………. 9 4.3 Installer Setup ……………………………………………………………… 10
4.4 Installer Setup Flowchart ………………………………………………. 11 4.5 OpenTherm Setup and
Information Display …………………….. 11 4.6 Set Service…………………………………………………………………..
12 4.7 Change PIN ………………………………………………………………… 14 4.8 What the User Will See When
a Service is Due ………………… 14 4.9 Resetting the Service Timer Function
……………………………… 14
= Signal Strength
5 SYSTEM CONFIGURATION: DT92E
5.1 DT92E Installer Mode …………………………………………………… 15
Wall
Wall
Wall
Ceiling
6 BINDING / RE-BINDING PROCEDURE
6.1 Binding……………………………………………………………………….. 16 6.2 ST9520C Guided Binding
Menu…………………………………….. 16 6.3 Replacing Devices or Changing the Application
……………… 16 6.4 Binding Menu Display…………………………………………………… 17 6.5 How to Bind
DT92E to ST9520C…………………………………….. 17 6.6 How to Bind BDR91T to ST9520C
………………………………….. 18 6.7 How to Test BDR91T Signal Strength ……………………………… 19
Max. Signal Length 30 metres
Typical example of Building Fabric Signal losses
7 COMMISSIONING THE SYSTEM
7.1 System Test Checklist …………………………………………………… 20 7.1 Completion
Checklist……………………………………………………. 20
2
1 INSTALLING THE ST9520C PROGRAMMER
1.1 Mounting ST9520C
For best performance, install in an open space. Leave at least 30cm distance
from any metal objects including pipes and the boiler housing.
After locating the DT92E room thermostats, use the Signal Strength Test shown
on Page 7 to determine if there is a reception problem. If problems persist,
it is recommended that this metal wallbox is replaced by an equivalent plastic
wallbox.
The Programmer should be mounted at a level where the display can be seen
clearly, (compliance with Building Regulations part M requires a height of
1.2m from the floor) and the ambient temperature is within the range of 0 to
40°C. The ST9520C is for use in normal domestic environments.
To remove the unit from the wall-plate, slacken the two securing screws at the
bottom of ST9520C and hinge the unit up to separate the two halves.
CAUTION
Isolate power supply and make safe before wiring the unit to prevent electric
shock and equipment damage. Installation should be carried out by a qualified
electrician or competent heating engineer.
1.2 ST9520C Mounting Options
Recommended clearance distances:
Above wallplate: Below wallplate: Left/right of wallplate:
110mm 100mm
10mm
a. Surface mounting concealed wiring
Ensure the mounting surface is supporting and fully covers the wiring wall- plate.
b. Flush switchbox
Fixing holes are spaced to suit BS4662 requirements
c. Surface mounting with surface wiring in mini trunking
1.3 Wiring ST9520C
EMC compliance considerations Keep AC mains supply/load cables separate from
signal wiring. Refer to Code of Practice standards EN61000-5-1 and -2 for
guidance.
1.4 ST9520C Final Assembly
ALL WIRING MUST BE IN ACCORDANCE WITH IEE REGULATIONS. THIS UNIT IS FOR FIXED
WIRING ONLY.
A switch, having contact separation of at least 3mm in all poles must be
incorporated in the fixed wiring as a means of disconnecting the supply.
The unit is a Class II (double insulated) device. A parking terminal is
provided for external earth continuity.
The system must be appropriately fused. A fuse rated at no more than 3 Amps
should be installed.
The unit has 4 knockouts for surface wiring. Care must be taken to ensure that
the cable or mini-trunking completely fills the knockout hole without leaving
any gaps.
If the OpenTherm 2 wire connection is used, maintain as large a separation as
possible between these wires and any mains voltage wiring.
Clip the unit onto the hinges on the top of the wallplate and hinge down into
position. Tighten the two securing screws using a screwdriver.
Switch on the power the unit will now be operating according to the built-in
programme.
Note: the ST9520C is supplied with a factory set clock for faster
installation.
Refer to Y9520Z User Guide for programming details.
3
1.5 ST9520C Internal Wiring
Clock
OFF ON OFF ON
230V~ 50…60Hz
N L
NL 1 2 3 4 AB
3 AMPS MAX
Zone2 OFF
Zone2 ON
Zone1 OFF
Zone1 ON
OpenTherm low voltage output to boiler. NOT MAINS
1.6 Wiring Diagrams
Notes
1. DT92E is completely wireless and so is not shown connected on these wiring
diagrams.
2. The ST9520C is a Class II (double insulated) device. A parking terminal is
provided for earth wiring continuity, if required.
3. The OpenTherm boiler connection (diagram 95-2) is a low voltage polarity-
free connection and is not for 230V~ mains voltages.
4. The BDR91T Relay Box (diagrams 95-3) requires a permanent 230V~ supply.
95-1 Wireless room thermostat, wired valves, wired TPI boiler control
V4043H 2 PORT ZONE VALVE ZONE 2
V4043H 2 PORT ZONE VALVE ZONE 1
BBGOG/LRRRYUEOAEEYNLWLGNEOW BBGOG/LRRRYUEOAEEYNLWLGNEOW
1 2 3 4 5 6 7 8 9 10
230V~ 50…60Hz
L N
3 AMPS MAX
NL1 2 3 4 AB
PUMP
L N E
*NOTE 2 ST9520C
L T1
N E BOILER
95-2 Wireless room thermostat, wired valves, OpenTherm 2 wire boiler control
BBGOG/LRRRYUEOAEEYNLWLGNEOW BBGOG/LRRRYUEOAEEYNLWLGNEOW
V4043H 2 PORT ZONE VALVE ZONE 2
V4043H 2 PORT ZONE VALVE ZONE 1
Additional notes
a. Orange wires from zone valves are `parked’ for convenience.
b. Pump live is taken from boiler. If boiler does not provide this output,
connect live input to pump from terminal 10
1 2 3 4 5 6 7 8 9 10
230V~ 50…60Hz
L N
3 AMPS MAX
NL1 2 3 4 AB
PUMP
L N E
*NOTE 2 ST9520C
PL T1 T2
L N E BOILER
4
1.6 Wiring Diagrams (cont.)
95-3 Wireless room thermostat, wired valves, wireless TPI boiler control
V4043H 2 PORT ZONE VALVE ZONE 2
V4043H 2 PORT ZONE VALVE ZONE 1
BBGOG/LRRRYUEOAEEYNLWLGNEOW BBGOG/LRRRYUEOAEEYNLWLGNEOW
1 2 3 4 5 6 7 8 9 10
230V~ 50…60Hz
L N
3 AMPS MAX
NL1 2 3 4 AB
Additional notes
a. Orange wires from zone valves are `parked’ for convenience.
b. Pump live is taken from boiler. If pump is located next to zone valves,
take the pump N and E from the 10-way junction box (terminals 2 & 3
respectively) and the pump switched Live from terminal 10.
230V~ 50…60Hz
L N
5 AMPS MAX
*NOTE 2 ST9520C
N L L ABC
BDR91T
A-B:5(3)A A-C:5(3)A
PUMP
L N E
PL T1 T2 L N BOILER E
1.7 Replacing Other Time Controls
ST9520C is supplied with its own wiring back-plate. As this is for new or
upgraded installations it is recommended this is used, and it MUST be used for
OpenTherm applications (95-3). ST9520C may mount on the back-plate of existing
time controls, but it is likely major wiring changes will be required for
compatibility with the plumbing and controls changes. Refer to the Resideo
Technical Help Desk for advice.
1.8 Powering Up ST9520C
Check the unit powers up correctly and that the display does not remain blank.
ST9520C must be powered up before the DT92E thermostats are installed, so that
the signal strength tests can be conducted. The initial signal strength test
will verify that both units have each others addresses in their memory, and
can therefore communicate. The process of writing respective addresses into
memory is called BINDING.
5
2 INSTALLING THE DT92E ROOM THERMOSTATS
2.1 Locating DT92E
This pack contains 2 x DT92E room thermostats for location in each control zone. The DT92E for Zone 1 has a zone ID label number 1 under the battery cover. The other DT92E has zone ID label 2. These thermostats must be located in the correct zone to ensure the correct valve is operated in response to their commands.
For best performance, install each DT92E in an open space where it can sense the room temperature, and
1.2m
where the signal strength is high.
The Room Thermostats can be mounted on a wall or on the optional table stand. Do not mount on metal wall-boxes.
Leave at least 30cm distance from any metal objects and at least 1 metre from any other electrical equipment.
Select the preferred location and test the Signal Strength before installation.
2.2 Powering Up DT92E
DT92E is supplied in the pack with the mounting plate separated from the rest of the unit for ease of installation. The next sequence of operations should be done before mounting DT92E onto its mounting plate.
First hold DT92E between 1 and 2 meters away from ST9520C. To power it up, unclip the battery cover and then remove the paper tab that isolates the batteries from their contacts. When the display powers up the battery cover should be clipped back on.
Immediately on power up, DT92E will try to communicate and
synchronise with ST9520C. This process may take up to 4 minutes, and
1
will be indicated by the word `Sync’ on the DT92E display.
When `Sync’ disappears from the display, DT92E is ready for a test of the RF signal strength between it and the ST9520C programmer.
Now go to section 2.3 to conduct the Signal Strength Test. 2
2.3 DT92E Signal Strength Test
Zone ID Number (1 or 2)
Resideo 2-way RF communications allows signal strength testing to
3 s
ensure DT92E can be positioned in the best possible location.
To enter Signal Strength Test:
2 s
a. Hold down the button for 2 seconds until the symbol is
displayed.
b. Hold down the and buttons together for 3 seconds until `Inst’ appears in the display.
c. Press the button (`Cont’ is now displayed)
d. Hold the button for 3 seconds to enter Test mode.
3 s
e. Signal Strength Test is entered from Test mode by holding the
button for 3 seconds, until the display shows `SS’.
ST9520C measures the strength of the DT92E signal every 5-10
seconds and will communicate this to DT92E as a number between
0 and 5. The value drops to 0 briefly as each new signal strength
measurement is made.
3 s
A signal strength of 3 or more is recommended to ensure reliable
communications.
Step 1
Hold DT92E between 1 and 2 meters away from ST9520C and check the signal
strength is high (3 or more). This confirms the two units are in the condition
they left the factory and are bound together, and you can move to Step 2.
10 s
If the signal strength is shown as 0, the units are possibly not bound together. Go to the section 6 Binding / Rebinding, follow the procedure there, and then repeat the complete Signal Strength Test sequence.
Step 2
Whilst staying in Signal Strength Test mode, take the DT92E to the preferred
location. Wait for 10 seconds and check the signal strength is 3 or more. If
so, the DT92E is ready to mount.
If the signal strength is less than 3, re-position the room thermostat within
the local area +/- 1 or 2m to see if the signal strength improves. If this
fails, try to reduce the range/distance between the room thermostat and the
ST9520C.
= 3, 4, 5
Strong signal, proceed to
mount the Room Thermostat.
= 0, 1, 2
Poor signal, reposition Room
Thermostat.
Exit Signal Strength Test by holding the button for 5 seconds. The DT92E will timeout of this mode after 10 minutes.
6
2.4 Mounting DT92E
DT92E can be mounted (a) directly on a wall, or (b) on the optional table stand provided. Wall mounting is recommended as it ensures a position of high signal strength can be maintained.
a. For wall mounting, install the mounting plate first, then follow steps 1, 2
and 3 to hinge the front piece on, as shown in the diagrams.
= No6
b. If the optional table stand is to be used, first assemble the two pieces together as shown. Next follow steps 1, 2 and 3 to hinge the DT92E front piece onto its mounting plate, and mount the unit onto the table stand.
1
2
3
2.5 Separating DT92E from its Mounting Plate (if required)
If the DT92E requires to be separated from its mounting plate, follow the
simple steps shown below.
2 3 1
7
3 INSTALLING THE BDR91T WIRELESS RELAY BOX (IF REQUIRED)
If the heating boiler is located remotely it is possible to control it using a wireless relay box BDR91T1000. This is not supplied in this pack and must be purchased separately. After installation it must be bound (paired) to the ST9520C timer and then the signal strength should be verified to ensure the location chosen is suitable.
3.1 Locating the BDR91T
For best performance install in an open space. Leave at least 30cm distance
from any metal objects including wall boxes and boiler housing. Do not mount
on metal wall boxes.
The BDR91T needs to be positioned in a location where the RF signal strength
from ST9520C is high. The simplest way to identify such a location in advance
is to use the signal strength feature on DT92E, because DT92E can be moved
around freely.
a) Remove one DT92E from its mounting plate (section 2.5)
b) Enter signal strength test (section 2.3)
c) Identify a location close to the boiler where the signal strength is 3 or
more.
d) After BDR91T is mounted and wired in this location, the signal strength it
is receiving can be verified using its own signal test (section 6.7)
e) Remember to re-attach DT92E to its mounting plate.
3.2 BDR91T Mounting Options
Ensure the mounting surface is supporting and fully covers the backplate and mount to the surface using the screw holes provided. An alternative pair of mounting holes is also available.
Removing the BDR91T cover
a. Mounting on a wall box
NOTE: The BDR91T contains no user serviceable parts. It should be opened and
installed by a qualified installer only. WARNING: Electrostatic sensitive
device! Do not touch the circuit board.
b. Surface mounting
< 7mm Ø
2
7mm Ø
1
Unclip the front cover and hinge it away to reveal the wiring backplate.
3.3 Wiring BDR91T
The BDR91T Relay Box requires a permanent 230V~ supply.
CAUTION
Isolate power supply and make safe before wiring the unit to prevent electric shock and equipment damage. Installation should be carried out by a qualified electrician or competent heating engineer.
3.4 BDR91T Final Assembly
Wire preparation
Ensure only the correct gauge of wire is used and tightened securely into the correct terminal.
= M3.5 = No6
For wiring schematics please refer to diagram 95-3 on page 5. EMC compliance
considerations Keep AC mains supply/load cables separate from signal wiring.
Refer to Code of Practice standards EN61000-5-1 and -2 for guidance.
Replacing the BDR91T cover
1
1.5-2.5mm² 6mm max. 8
Insert the hinges and close the cover until it clips closed at the bottom.
2
4 SYSTEM CONFIGURATION: ST9520C
4.1 ST9520C Installer Modes
ST9520C has 4 Installer Modes that enable the product to be customized for the
application and for the needs of the User. Each adjustable feature is called a
Parameter, and is represented by a number or letter ID and a value. The Modes
are:· InstallerSetup
Installer Setup allows features to be adjusted to suit user lifestyles or
preferences, for example; backlight operation, automatic time-change, and
selection of the default time programme. It is entered by a combination of
button presses. · OpenTherm Setup (and information display)
This mode allows OpenTherm communications to be enabled, the OpenTherm
parameters to be configured, and some OpenTherm data from the boiler to be
displayed. · SetService
This is where the ST9520C Boiler Service Reminder and Shut-down Features can
be set. This mode can only be entered by using a 4 digit PIN code. The factory
supplied default PIN code is 0000 · ChangePIN
This mode allows the 4-digit PIN code to be adjusted. It is itself protected
by the PIN code. When the code is changed this new code is used to enter both
SET SERVICE and CHANGE PIN modes.
To Enter & Navigate Around the Installer Modes:
a. Ensure the slider is in the RUN position, then press and hold
and
buttons together for 8 seconds. Ignore the `NOT VALID’
that is displayed for a few seconds. The message `SET UP MENU’
will show briefly, to indicate you have entered the Setup menu. The
LoTTM Display will continue to show messages indicating which
Installer Mode is possible to select, for example `SET INSTALLER
OK ?’
b. Use the
or buttons to navigate to the correct Installer Mode.
c. Use the button to confirm you wish to enter that particular mode.
Installer Mode Installer Setup OpenTherm Setup
Set Service Change PIN
LoTTM Display Message SET INSTALLER OK ?’SET OPENTHERM OK ?’ SET SERVICE OK ?’CHANGE PIN OK ?’
To Exit Installer Modes:
You can exit the Installer Modes at any time by moving the slider to the next
position and then back again to RUN. Any changes that have been confirmed will
be saved and used.
Note: The Installer Modes and the Setup Menu will exit automatically after 10
minutes if the slider is not moved and no adjustments have been made in this
time.
4.2 Boiler Service Reminder / Shut-down Feature
The ST9520C Programmer has a Service feature that can assist Social Housing
Landlords to comply with the requirements of Regulation 36 of the Gas Safety
(Installation & Use) Regulations 1998. It is intended as an aid to compliance
but should not be used to replace the Landlord’s existing Servicing
procedures. The ST9520C performs like a standard 2 Zone programmer. In
addition it can automatically provide a Service Reminder and can be set to
Shut-down the heating once the gas Boiler Service becomes overdue. This helps
to eliminate the potential for an incident to occur after the Landlord’s
Safety Certificate has expired.
The operation of the Service Feature is flexible. The landlord or installer
can set the following: · Theserviceinterval,indays ·
Anadvancereminderforthetenant,bycountingdowndaysuntilserviceisdue ·
AcontacttelephonenumbertocalltoarrangetheservicedisplayedontheLCDscreen ·
Howthetimerwilloperatewhentheserviceintervalhasexpired.
The options include: 1. Continued normal operation with a Reminder message 2.
Total shutdown of heating 3. “Prompt” mode shutdown that will allow
repetitive manual over-ride for one hour at a time.
The Service feature is configured from a special Installer Mode called `SET
SERVICE’. Entry into this mode is only possible by entering a unique 4 digit
PIN code. Note: The ST9520C is supplied from the factory with the Service
features DISABLED. They need to be enabled from the Installer Modes. See
section 4.6 Set Service for details.
9
4.3 Installer Setup
The system can be set up to operate in a variety of different ways to suit the
application, or the user lifestyle or preferences.
This setup is done via the ST9520C Installer Setup. The features that can be
adjusted are called Installer Parameters, and are listed in the table below,
along with a description of the options that are possible.
INSTALLER PARAMETER
24hr or am/pm clock display.
Configure backlight operation.
Enable/disable auto time change. 1-day or 5/2-day or 7-day operation.
Number of ON/OFFs per day. Select default time programme.
- Set Hot Water Temperature Optimum start
Optimum start limit (Only available if OP START set to 2) Optimum stop
Frost protection temperature Minimum ON/OFF time Cycle rate Proportional band width
Failsafe mode (loss of RF communications) ** Reset all parameters
Parameter Number 1 2
3 4
5 6
8 9
10
11 12 13 14 15 16 20
LoTTM Display Description
CLOCK MODE BACKLIGHT
AUTO TIME UNIT TYPE
ON PERIODS DEF PROFILE
WATER TEMP OP START
STRT LIMIT
OP STOP FROST TEMP MIN ON-OFF CYCLE RATE PROP BAND COMMS LOSS PROG RESET
Default Value
12 2
1 7
3 A
60 0
1
0 5 1 6 15 (=1.5°C) 0 1
Range of Values 12, 24 0, 1, 2
0, 1 1, 5, 7
2, 3 A, b, C
40 … 85°C 0, 1, 2
1, 2, 3
0, 1 5 to 16°C 1, 2, 3, 4, 5 minutes 3, 6, 9, 12 15 … 30 (=1.5 … 3.0°C)
0, 1 0, 1
Description [LoTTM Display Description]
12 = am/pm display, 24 = 24hr display
0 = off, 1 = on if button pressed, 2 = on continuously
0 = disabled, 1 = enabled
1 = 1-day operation, 5 = 5/2-day operation, 7 = 7-day operation
2 = 2 on/offs per day, 3 = 3 on/offs per day
A = standard, b = at home, C = economy
Hot Water Temperature
0 = no optimum start 1 = delayed start 2 = optimum start on
1 = 1 hour 2 = 2 hours 3 = 3 hours
0 = disabled, 1 = enabled
Frost protection temperature
Minimum ON/OFF time
Number of boiler cycles
Control proportional band
[AM PM] [24 HOUR] [NO B-LIGHT] [B-L DELAY] [B-LIGHT ON] [NO CHANGE] [TIME CHANGE] [1-DAY] [5-2 DAY] [7-DAY] [2 PER DAY] [3 PER DAY] [PROFILE A] [PROFILE B] [PROFILE C] [SET WATER TEMP] [NO OP-STRT] [DELAY-STRT] [OP-STRT ON] [1 HOUR] [2 HOURS] [3 HOURS] [NO OP-STOP] [OP-STOP ON] [SET FROST TEMP] [SET MIN ON-OFF] [SET CYCLE RATE] [SET PROP BAND]
0 = off 1 = on 20%
0 = do not reset 1 = default parameters
[HEAT OFF] [20 PERCENT] [RESET OFF] [RESET ON]
- Not used in this system.
** This parameter by default has a value of 1, unless you change any other parameter, when it will change to 0. Set it to 1 to reset all parameters back to defaults. Some parameters may not be displayed, depending on the settings made for prior parameters.
Recommendations for Specific Boiler Applications
Application Gas boiler Oil boiler
Cycles per hour 6 3
Minimum on/off time 1 4
What to change:
No changes required, leave at default values Set parameter 13: 1 to 13: 4 Set
parameter 14: 6 to 14: 3
To Enter Installer Setup:
a. Ensure the slider is in the RUN position, then press and hold the and
buttons together for 8 seconds. Ignore the `NOT VALID’ that is
displayed for a few seconds. The message SET UP MENU’ will show briefly, followed bySET INSTALLER OK ?’
b. Press the button to take you into the Installer Setup Parameter Menu.
c. Parameter 1 is now available to change. This is to allow you to change the clock format from 12 hour AM/PM to 24 hour. At every step, the LoTTM Display will inform you what the parameter means and what option you have selected. The parameter number is shown on the display separated by a colon from the parameter value.
d. You can change the parameter value by pressing the
or buttons. At this point the description in the LoTTM Display will change and the
parameter value will flash. If you press the value will stop flashing and will be saved for use.
e. Press to move to the next parameter available for editing. The parameter number will change accordingly.
f. Keep pressing to step around the list of parameters, and use
or buttons to change the parameter value.
g. Any parameter changes that have been confirmed with the button will be saved and used.
To Exit Installer Setup: You can exit any Installer Mode at any time by moving the slider to the next position and then back again to RUN. Note: Installer Modes will exit automatically after 10 minutes if the slider is not moved.
10
4.4 Installer Setup Flowchart
LoTTM Display
Parameter Number
or
Parameter Value
4.5 OpenTherm® Setup and Information Display
ST9520C has the facility for a direct low voltage communications connection to
the boiler using the OpenTherm® protocol. If the boiler supports it, OpenTherm
allows the boiler’s gas valve to be controlled so the amount of heat provided
exactly matches the varying demand. By reducing the flow temperature to a
minimum as it leaves the boiler, the return temperature is kept below the dew
point (55°C) whenever possible, thus allowing the boiler to operate in its
most efficient condensing mode.
The OpenTherm control can be adjusted by setting some parameters in OpenTherm
Setup mode. In addition, as OpenTherm is a communications protocol, it is
possible to view some operating metrics in this mode, such as supply water
temperature, pressure, and flame modulation level. These are shown in the
table below.
OpenTherm PARAMETER Parameter LoTTM Display Default Range of Description [LoTTM Display Description]
ID
Description Value Values
Enable or Disable OpenTherm
Ot
OpenTherm
0
0, 1 0 = disabled 1 = enabled
[DISABLED] [ENABLED]
Supply water temperature
SUPPLY °C
—-
0 99 Supply water temperature
[SUPPLY °C]
Water pressure
PRESSURE
—- 0.0 – 4.0 Water pressure
[PRESSURE]
Flame modulation %
MODULATION —-
0 100 Flame modulation %
[MODULATION]
Central Heating Output Temperature Limit
CL
CH LIMIT
90 40 90 * Central heating water temperature limit [SET CH LIMIT]
Enable or Disable
LL
OpenTherm Low Load Mode
LOW LOAD
1
0, 1 ** 0 = disabled
1 = enabled
[DISABLED] [ENABLED]
Reset OpenTherm parameters to defaults
rS
OT RESET
1
0, 1 0 = do not reset
1 = default parameters
[NO RESET] [RESET]
- this value may be further limited by the boiler ** the boiler may not allow low load operation
Note: When OpenTherm is enabled, BOILER binding is not possible and anything already bound in the BOILER binding slot is deleted (see page 16). Refer to Resideo Technical Help Desk for wireless OpenTherm possibilities using the R8810A OpenTherm receiver.
11
4.5 OpenTherm® Setup and Information Display (cont.)
To Enter Set OpenTherm Mode:
a. Enter Installer Modes (as described on page 9) and navigate to SET OPENTHERM mode. In response to the query `SET OPENTHERM OK ?’, press the button to enter SET OPENTHERM.
b. The first OpenTherm parameter `Ot’ is now available to adjust. This allows you to enable or disable OpenTherm communications. The parameter ID is shown on the display separated by a colon from the parameter value. If this parameter is set=0, OpenTherm will not function and no other OpenTherm parameters will be accessible.
c. You can change the parameter value by pressing
the
or buttons. At this point the description
in the LoTTM Display will change and the parameter
value will flash. If you press the value will stop
flashing and be saved for use.
d. Press to move to the next parameter. If the parameter is a Display parameter it does not have an ID code. It cannot be adjusted but will simply display the information supplied by the boiler.
e. Keep pressing to step around the list of available
parameters, and use
or buttons to change
the parameter value, where allowed.
f. Any parameter changes that have been confirmed with the button will be saved and used.
Only if OpenTherm is enabled (Ot=1) will it be possible to access the
other parameters
To Exit Set OpenTherm Mode: You can exit Set OpenTherm Mode at any time by moving the slider to the next position and then back again to RUN.
4.6 Set Service
Set Service parameters are listed in the table below, along with a description of the options that are possible. Most are only displayed if Service is enabled i.e. parameter AL is set = 1.
`SET SERVICE’ PARAMETER
Parameter LoTTM Display Default Range of Description [LoTTM Display Description]
ID
Description Value Values
Enable or disable service alarm feature
AL
SERV MODE
0
0, 1 0 = disabled 1 = enabled
[DISABLED] [ENABLED]
Number of days till next Service
d
SERV DAYS
364
001 to 001….400
400 000 = service is overdue
[SET DAY COUNT]
Number of days for advance warning
Ad
DAYS NOTICE 28
0 to 28 0 …28
[SET DAYS NOTICE]
Action taken at time-out
to
ACTION TYPE
2
0, 1, 2 0 = no action,
1 = switch off,
2 = `prompt’ mode
[NO ACTION] [SWITCH OFF] [PROMPT MODE]
Number of EXTRA HOUR button presses allowed in `Prompt’ mode
bP
1HR BOOSTS uL
uL, uL = unlimited number,
[NUM BOOSTS]
1 to 99 1…99 = specified number of button
presses, after which unit switches off
Enable telephone call number display
tC
SHOW
0
0, 1 0 = disabled
PHONE
1 = enabled
[DISABLED] [ENABLED]
Enter contact telephone STD code
St
STD CODE ——-
1
When a
or button is first pressed the LoTTM Display
shows a row of dashes which can be adjusted using
or
buttons, then verified using the button.
Enter contact telephone number
nu
NUMBER ———
1
When a
or button is first pressed the LoTTM Display
shows a row of dashes which can be adjusted using
or
buttons, then verified using the button.
- Reset `SET SERVICE’
rS
parameters to default values
ALRM RESET
1
0,1 0 = do not reset 1 = default parameters
[NO RESET] [RESET]
- This parameter by default has a value of 1, unless any other parameter is adjusted, when it will change to 0. Set it to 1 to reset all parameters back to defaults
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4.6 Set Service (cont.)
To Enter Set Service Mode:
a. Enter Installer Modes (as described on Page 9) and navigate to SET SERVICE mode. In response to the query `SET SERVICE OK ?’ press the button to enter SET SERVICE.
b. The message `ENTER PIN’ will now be displayed,
along with the 4-digit entry code format 0—. The
first digit will be flashing, to indicate it can be
changed. Use the
or buttons to set the
first digit, and press to confirm the digit.
c. At this point the first digit will stop flashing and the second digit will begin to flash, indicating it can be changed.
d. Proceed in this way to enter the 4 digits of the
PIN code. Upon confirming the last digit, if the
PIN was incorrect, the message `INVALID’ will be
or
displayed, and then the whole process will start
again from step b. above.
e. If the PIN was correct, the first SET SERVICE
or
parameter `AL’ will be available to change. This
allows you to enable or disable all the service
alarm features. At every step, the LoTTM Display
will inform you what the parameter means and
what option you have selected. The parameter ID
is usually shown on the display separated by a
colon from the parameter value.
f. You can change the parameter value by
pressing the
or buttons. At this point the
description in the LoTTM Display will change and
the parameter value will flash. If you press the
value will stop flashing and will be saved for use.
g. Press to move to the next parameter available for editing. The parameter ID will change accordingly.
h. Keep pressing to step around the list of
parameters, and use
or buttons to
change the parameter value.
i. Any parameter changes that have been confirmed with the button will be saved and used. Some parameters may be made invalid by a previous parameter setting, and these will be skipped over in the setting process.
To Exit Set Service Mode: You can exit Set Service Mode at any time by moving the slider to the next position and then back again to RUN.
13
4.7 Change PIN
If you intend to change the PIN code, please ensure you take a note of the new code that you are setting.
The process for changing the current PIN code is as follows:
a. Enter Installer Modes (as described on Page 9) and navigate to CHANGE PIN mode. In response to the query `CHANGE PIN OK ?’ press the button to enter CHANGE PIN mode.
b. The message `ENTER PIN’ will now be displayed, along with the 4-digit entry code format 0—. The first digit will be flashing, to indicate it can
be changed. Use the
or buttons to set the first digit, and press to confirm the digit.
c. At this point the first digit will stop flashing and the second digit will proceed to flash, indicating it can be changed.
d. Proceed in this way to enter the 4 digits of the old PIN code. Upon confirming the last digit, if the PIN was incorrect, the message `INVALID’ will be displayed, and then the whole process will start again from step b. above.
e. If the PIN was correct the message `SET NEW PIN OK ?’ will appear. As before, use the
or buttons to set the digits, and the button to
confirm. Upon confirming the final digit, the message `PIN SET’ will be displayed, and the new PIN code will be held on the screen for 5 seconds,
to give you time to note it down.
f. After setting the new PIN code, you will be taken back to the SETUP MENU.
4.8 What the User Will See When a Service is Due
If the advance warning has been configured, the screen will flash this message
every few seconds, and the User should telephone to arrange a service call
before the final date when the service is due. If a telephone number has been
entered using the SHOW PHONE’ feature, this will be displayed when the advanced warning period commences. When the boiler service is overdue the screen will keep flashing the words SERVICE DUE’ every second. If the NO ACTION option has been selected, the
unit will continue to operate as normal and the real time will continue to be
shown.
If the SWITCH OFF or PROMPT Actions have been selected, the `SERVICE DUE’
message will flash and the word “OFF” will appear on the display. The boiler
has been switched off to ensure the safety of the User. A service appointment
should be arranged immediately.
In PROMPT operation, the User can obtain limited use of the boiler by pressing
the EXTRA HOUR button. Each button press will allow operation of the boiler
for 1 hour at a time, and the screen will display the message `On 1h’, as
shown. A service appointment should be arranged immediately.
If a contact telephone number has been programmed into the ST9520C, a message
will appear on the LoTTM Display indicating the number that should be called.
4.9 Resetting the Service Timer Function
If the Service Timer function is enabled you will be required to reset it
after the boiler service has been carried out. The process for resetting the
Service Timer is as follows: a. Enter Installer Modes (as described on page 9)
and navigate to SET SERVICE mode. In response to the query `SET SERVICE OK ?’
press the
button to enter SET SERVICE mode. b. If you no longer require the Service
Timer, disable it by setting parameter AL to 0 and confirm with the button. c.
If you still require the Service Timer, set the number of days until the next
service is due using parameter d and confirm with the button. d. Whilst in SET
SERVICE mode, use the opportunity to change any other service parameters if
required. e. Exit by moving the slider to the next position and back again to
RUN.
14
5 SYSTEM CONFIGURATION: DT92E
5.1 DT92E Installer Mode
Like ST9520C, DT92E also has an Installer Mode to enable it to be customized for the application. Each adjustable feature is called a Parameter, and is represented by a letter ID and a value on the display, as shown.
Parameter
Value
The Parameters are listed in the table below:-
INSTALLER PARAMETER Temperature measurement offset Upper setpoint limit Lower setpoint limit Energy saving ECO setpoint Reset parameters to factory settings
Parameter t0 uL LL ES FS
Default Value 0 35 5 18 1
Range of Values -3 to 3°C 21 to 35°C 5 to 21°C 5 to 35°C 0, 1
Description Offset to measured temperature
Upper set temperature limit in °C
Lower set temperature limit in °C
Energy saving ECO set temperature in °C
Parameter will be set to 0 if any of the other parameter values have been
changed. Set to 1 to get back to factory settings.
To Enter Installer Mode:
a. Hold the button for 2 seconds until DT92E is in standby mode
b. Hold and buttons for 3 seconds until the word `Inst’ appears on the display
c. Press the button
The first parameter is now ready to be changed
3 s 2 s
To Select a Parameter:
Use the and buttons to move from one parameter to the next. Stop at the
Parameter you wish to change.
To Change a Parameter:
Use the button to select the parameter value, then the and buttons to change
the value. Confirm the change by pressing the button again to take you back to
the parameter.
To Exit Installer Mode:
Hold the button for 3 seconds to exit
3 s
Installer Mode.
Note: The Installer Mode will exit automatically after 10 minutes if no adjustments have been made in this time.
15
6 BINDING / RE-BINDING PROCEDURE
6.1 Binding
2-way RF devices that communicate with each other achieve this through having
each others unique addresses written in their memories. This allows each
device to know which other device to communicate with. The process of writing
these addresses is known as Binding. All devices in the pack are pre-bound at
the factory. The binding operation is only required if:
– any of the system components are replaced – pre-bound system pack components
have been mismatched – additional components are required for the application,
e.g. BDR91T relay box for remote boiler application 95-3. In this case the
BDR91T must be bound to the ST9520C as a BOILER CONTROL (see section 6.6).
6.2 ST9520C Guided Binding Menu
The ST9520C is the communications `hub’ of the entire system, so other RF devices are bound to it and not to each other. ST9520C has a special
Guided Binding Menu’ that allows you to bind other devices to it in a logical way. Devices are bound into specialslots’ and there are rules governing
what can be bound into which slot. This ensures binding errors are minimised and applications are correctly set up. When in `Guided Binding Menu’
the
and buttons are used to navigate around.
Sensor binding (refer to section 6.5 for sequence of steps)
It is possible to bind 2 sensors to ST9520C in separate binding slots, a DT92E
thermostat for Zone 1 and a DT92E thermostat for Zone 2. If the display shows
dashes it means there is nothing already bound in the slot. If the display
shows `bnd’ it means there is something already bound.
Control and boiler binding (refer to section 6.6 for sequence of steps)
Once a valid sensor is bound, it is then possible to bind an output device,
such as a BDR91T relay box. If this is to control remote zone valves for the
heating zones, then use the CONTROL binding slots. In the special case of
controlling a remote boiler, use the special BOILER binding slot. When this is
bound, the Guided Binding Menu then allows a signal strength test to be
initiated (refer to section 6.7 for sequence of steps).
Binding table by application
Application Zone 1 Sensor Zone 2 Sensor
SENSOR
SENSOR
Zone 1 Control Output
CONTROL
Zone 2 Control Output
CONTROL
Boiler Output
BOILER
Binding Required
95-1
DT92E
DT92E
— —
95-2
DT92E
DT92E
— —
95-3
DT92E
DT92E
— —
— —
— —
Supplied pre-bound
— —
— —
Supplied pre-bound
— —
BDR91T Bind in BDR91T
General Binding Notes
· Tobind2devicestogether,BOTHmustbeputintoBindingMode. ·
Withbothdevicesinbindingmode,youmustsendthebindingsignalfromonedevicetotheother:
– To bind a sensor, the signal is sent from the sensor.
– To bind an output device, the signal is sent from the ST9520C.
6.3 Guidance for Replacing Devices or Changing the Application
Note: if a sensor is removed, the binding for any output device associated with that sensor will be cancelled.
Situation 1. Replacing faulty DT92E 2. Replacing faulty BDR91T
3. Reconfiguring system by adding or removing BDR91T
Binding Action · BindnewsensoroverpreviousbindinginSENSORslot. ·
BindnewBDR91ToverpreviousBDR91TinCONTROLorBOILERslotand
remove faulty BDR91T from system. ·
IfremovingBDR91T,cancelbindinginthatCONTROLorBOILERslot. ·
IfaddingBDR91T,bindintovacantCONTROLorBOILERslot.
16
6.4 Binding Menu Display
Zone 1
SENSOR : means temperature sensor BOILER : means output device wired to boiler
CONTROL : means output device wired to zone valve
Zone 2 Boiler
bnd : indicates something is already bound in this slot — — : indicates
nothing is currently bound in this slot
6.5 How to Bind DT92E to ST9520C
a. Ensure the ST9520C slider is in the RUN position, then press and hold , and
Zone 2 MODE buttons for 8 seconds to access the Guided Binding Menu. The
message BIND MENU’ will show briefly, followed by the binding display. b. From the Guided Binding Menu, select the Room Temperature SENSOR binding mode. Pay attention to which zone is being bound, Zone 1 or Zone 2. c. Refer to the table in Section 6.3 to determine whether you require to cancel any binding. If the display shows dashes it means there is nothing already bound in the slot. If the display showsbnd’ it means there is
something already bound. When in Guided Binding Menu’ the and buttons are used to navigate around. d. Any existing binding can be cancelled by holding the button for 8 seconds and the LoTTM Display will sayRESET’ for a few seconds. e. Press the button
on ST9520C to put it into binding mode, ready to receive the binding message
from the sensor. The display will flash and the
message BINDING’ will be shown to indicate ST9520C is waiting for this message. f. Now bring DT92E (or its front section, minus mounting plate) to approximately 1 metre from ST9520C. g. Put DT92E into binding mode as shown. – Press and hold the button for 2 seconds – Hold the and buttons for 3 seconds until display showsInst’ – Press the button and the display shows `Cont’
3 s
2 s
h. If you do not need to cancel existing binding in DT92E (see section 6.3)
skip this step and go straight to step i. – Keep pressing the button until the
display shows CLr’ – Press the button to clear existing binding data – Now put DT92E into binding mode by pressing the button again. The display will showCOnt’.
i. Press the button on DT92E to send the binding message to ST9520C. If
binding was successful DT92E will exit binding mode, and will show SYnc’ on its display for up to 4 minutes, as communication and synchronisation are established. The ST9520C display will stop flashing,bnd’ will be shown, and
the LoTTM Display will say `COMPLETE’ for a few seconds.
j. If binding was unsuccessful, repeat step i. If this fails, repeat steps e.
to i. again. If binding was successful, proceed to step k. k. Exit Guided
Binding Menu by moving the ST9520C slider to the next position and then back
again to RUN (it will exit automatically after 10
minutes if the slider is not moved). l. Now go to section 2.3 to verify
communication by using the Signal Strength check.
17
6.6 How to Bind BDR91T to ST9520C
NOTES:
· It is only possible to bind a BDR91T if both sensors (DT92E) have already
been bound to the sensor slots in ST9520C.
· BDR91T can be bound as a CONTROL device, to operate a zone valve for example
(refer to Resideo for supported applications) or as a BOILER control (refer to
Binding Table in section 6.2 for details).
a. Ensure the ST9520C slider is in the RUN position, then press and hold , and Zone 2 MODE buttons for 8 seconds to access the Guided Binding Menu. The message `BIND MENU’ will show briefly, followed by the binding display.
b. Refer to the table in Section 6.3 to determine whether you require to cancel any binding. The SENSOR binding slot will be displayed first. Use
the
and buttons to navigate to the CONTROL or BOILER binding slots, where
CONTROL’ orBOILER’ will appear on the display. If the
display shows dashes it means there is nothing already bound in the slot. If the display shows `bnd’ it means there is something already bound.
c. Any existing binding can be cancelled by holding the button for 8 seconds and the LoTTM Display will say `RESET’ for a few seconds.
d. Now go to the BDR91T. If you need to cancel any previous binding in BDR91T, hold the button down for 15 seconds. The red light will give a quick flash every second. Otherwise go to step e.
15 s
0.1s
0.1s
0.1s
0.9s
0.9s
e. Hold the BDR91T button for 5 seconds until the red light flashes on for 0.5s, off for 0.5s. The BDR91T is now in binding mode awaiting the binding message from ST9520C.
5 s
0.5s
0.5s
0.5s
0.5s
0.5s
f. Now press the button on ST9520C to send the binding signal. If binding was
successful the ST9520C display will stop flashing, bnd’ will be shown, and the LoTTM Display will sayCOMPLETE’ for a few seconds. The flashing red
light on BDR91T will also go off.
g. If binding was unsuccessful, repeat step f. if this fails, repeat steps d.
to f. again. When binding has succeeded, proceed to step h.
h. Exit Guided Binding Menu by moving the ST9520C slider to the next position
and then back again to RUN (it will exit automatically after 10 minutes if the
slider is not moved).
i. Now go to section 6.7 to verify communication by using the Signal Strength
test.
18
6.7 How to Test BDR91T Signal Strength
Resideo 2-way RF
communications allows signal strength testing to verify BDR91T is positioned in the best possible location.
a. Enter ST9520C Guided Binding Menu (ensure the slider is in the RUN position, then press and hold seconds. The message `BIND MENU’ will show briefly, followed by the binding display).
, and Zone 2 MODE buttons for 8
b. Navigate to the Signal Strength Test screen by pressing the button until the message `SIGNAL TST OK?’ appears on the display.
c. Press the button to activate the test. The ST9520C will show SIGNAL TST’ and flashSS’ on the display.
d. Go to the BDR91T where the red light will flash several times quickly in
succession, repeating every 5 seconds. The number of flashes in each burst
will be between 0 and 5, with 5 representing a strong signal and 0 a weak one.
e. If the signal strength is less than 3, re-position the BDR91T within the
local area +/- 1 or 2m to see if the signal strength improves.
f. Signal Strength Test is cancelled by pressing the or buttons on ST9520C or
by moving the slider to exit the Guided Binding Menu.
19
7 COMMISSIONING THE SYSTEM
7.1 System Test Checklist 1 Check ST9520C has powered up correctly and the
display is not blank. Now set Zone 1 and Zone 2 operating modes to
AUTO.
2 Check both DT92E thermostats have powered up correctly and the displays are
not blank. 3 Configure DT92E thermostats as required (see Section 5 for how to
do this). Remember to make a note of any changes
in the Configuration Data section of the User Guide.
4 Change the temperature setpoint on both DT92E thermostats to 35°C by
pressing the button. (If DT92E is currently off, hold the button for 2 seconds
to take it back to run mode).
5 Now go to ST9520C. With Zone 1 and Zone 2 operating modes set to AUTO,
switch Zone 1 and Zone 2 on and off using the OVERRIDE buttons, to ensure the
system is operating correctly. If OpenTherm control has been enabled
(application 95-2) go into OpenTherm SETUP mode as explained in section 4.5
6 and verify the display parameter for the supply water is showing actual
values rather than —-. This indicates OpenTherm communications are
functioning.
7 If a BDR91T relay box has been installed (application 95-3), verify it is
switching the relay on and off in response to manual operation of the ST9520C
OVERRIDE buttons. The relay status is indicated by the green light on the
BDR91T.
8 Check the factory-set day, date, and time are correct and adjust if
necessary. Refer to User Guide for details. 9 If required, enter Installer
Setup Mode and adjust Installer Parameters to match the lifestyle and needs of
the User.
Remember to make a note of these parameter changes in the Configuration Data
section of the User Guide.
10 If required, enter Set Service Mode and enable the Boiler Service Reminder,
and set the appropriate Service parameters. 11 Set both DT92E thermostats to
the temperature required by the User. 20°C is recommended for a living area
and 18°C
for a bedroom zone.
7.2 Completion Checklist 1 Explain the operation of the products to the User,
and help them to set their Zone 1 and Zone 2 programmes. ST9520C
has 3 built-in profiles that can be used as a basis for typical User
programmes.
2 Explain when the User should contact someone to arrange a Service Visit, and
what you have programmed to happen when the Service is overdue.
3 If required, attach the self-adhesive programme guide label to the underside
of the ST9520C cover flap. The label is supplied in the box.
4 Write the date of installation, your name and telephone number in the space
provided in the User Guide, in the section `Boiler & System Service Log’.
5 Remember to leave the User Guide and Installation Instructions with the User
and remind them to keep them in a safe place. This forms part of a Home
Information Pack.
This product and its associated documentation and packaging are protected by
various intellectual property rights belonging to Resideo Inc and its
subsidiaries and existing under the laws of the UK and other countries. These
intellectual and property rights may include patent applications, registered
designs, unregistered designs, registered trade marks, unregistered trade
marks and copyrights. Resideo reserves the right to modify this document,
product and functionality without notice. This document replaces any
previously issued instructions and is only applicable to the product(s)
described. This product has been designed for applications as described within
this document. For use outside of the scope as described herein, refer to
Resideo for guidance. Resideo cannot be held responsible for misapplication of
the product(s) described within this document.
50047644-006 A © 2018 Resideo Inc.
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