Ambirad SmartCom 3 User manual


2
INDEX Section
Technical Specifications
1.1 Operating Environment ------------------------------------------------------------------------------------- 3
1.2 Performance Specifications -------------------------------------------------------------------------------- 3
1.3 SC3MZ Multi Zone Electrical Specifications ----------------------------------------------------------- 3
Installation Instructions
2.1 Mounting the Control Assembly --------------------------------------------------------------------------- 4
2.2 General Wiring Specifications ----------------------------------------------------------------------------- 5
2.3 SC3MZ Version Wiring Connections -------------------------------------------------------------------- 6
Operating Instructions
3.1 Factory default settings ------------------------------------------------------------------------------------- 7
3.2 The Buttons ---------------------------------------------------------------------------------------------------- 7
3.3 The Settings button ------------------------------------------------------------------------------------------ 9
3.4 Setting the clock ---------------------------------------------------------------------------------------------- 9
3.5 Setting the Program (on/off times) ----------------------------------------------------------------------10
3.5.1 Copying the Programs -----------------------------------------------------------------------------------11
3.6 Setting the Modes--------------------------------------------------------------------------------------------12
3.7 Setting day and night temperatures ---------------------------------------------------------------------13
3.8 Setting the system OFF ------------------------------------------------------------------------------------14
3.9 Optional Passwords ----------------------------------------------------------------------------------------15
3.10 Checking the temperature -------------------------------------------------------------------------------16
3.11 Setting a temporary Holiday period -------------------------------------------------------------------16
3.12 Setting a temporary Overtime extension period ----------------------------------------------------16
3.13 Setting a temporary Vent period -----------------------------------------------------------------------16
3.14 Display messages -----------------------------------------------------------------------------------------17
3.14.1 Error message:- Lockout ------------------------------------------------------------------------------17
3.14.2 Exam period ----------------------------------------------------------------------------------------------17
3.14.3 Optimum Start and Optimum Stop ------------------------------------------------------------------17
3.14.4 Service hours ---------------------------------------------------------------------------------------------17
3.14.5 External Sensor fault indication ----------------------------------------------------------------------17
3.14.6 External Inputs -------------------------------------------------------------------------------------------18
3.14.6.1 External Input priority --------------------------------------------------------------------------------18
3.15 Network Controllers ---------------------------------------------------------------------------------------19
3.15.1 Operating the Master -----------------------------------------------------------------------------------19
Engineer Settings
4.1 Introduction ---------------------------------------------------------------------------------------------------20
4.2 Settings --------------------------------------------------------------------------------------------------------20
4.3 The Engineer Variables ------------------------------------------------------------------------------------20
Battery Cell information
5.1 Battery replacement ----------------------------------------------------------------------------------------25
5.2 Battery specification ----------------------------------------------------------------------------------------25

3
In order to satisfy the increasing need for
higher efficiencies and to complement the
development of efficient heating systems
AmbiRad has upgraded their ‘SmartCom’ range
of controllers.
With a new larger, back lit screen and simpler
to operate with intuitive programming,
SmartCom³ provides cost effective energy for
small single heater installations through to large
Introduction
multi-zone applications requiring centralised
control. This operating manual gives simple
step by step instructions for both the end user
and commissioning engineer alike.
This control must be installed according to
the current Regulations and should include
full disconnection means and fusing appropriate
to the connected loads.
1 Technical Specifications.
1.1 Operating Environment
• Operating temperature range: 0º F to 104º F
• Operating humidity range: 0 to 90% RH.
• Control IP rating: IP30
• Pollution degree: II environment
• Control safety construction: class II
• Mains supply: 24Vac nominal, 20Vac to
28Vac actual.
• On board supply fuse: 1AT
• Rated impulse voltage: 2500V
1.2 Performance Specifications
• Operation is by Class A software and Type
1A action. Version U1
• The mains supply to the electronic circuit is
protected by a time delay fuse.
• Flame failure input: 24Vac nominal, 20Vac
to 28Vac actual. Presence of voltage
indicates flame failure.
• The burner reset relay output is either 24V
Live or Neutral which is selected by a
plug-in jumper.
• Remote volt-free switch outputs will be
24Vdc/5mA
• The built-in room temperature sensor has a
measuring range of 23.6º F to 94.6º F with a
resolution of 0.36º F.
• Temperature sensor readings can be offset
to allow for errors due to sensor tolerances
and location. NB Frost protection readings
are also affected by offsets.
Built-in and remote room temperature sensor.
Unless well ventilated, heat generated in the
controller may cause the built-in sensor to
over-read temperatures.
Remote duct temperature sensor.
1.3 SC3 MZ Electrical Specifications
The power supply is SELV isolated, therefore
low voltage wiring to the control does not need
to be mains level rated.
All relays except Vent
1 rating: 10A/24Vac resistive
2A/24Vac inductive
Vent 1 relay rating 10A/24Vac resistive
3A/24Vac inductive,
Power consumption: 5W
Communications
wiring:
Shielded twisted pair
Daisy-chain
configuration.
Belden 9841 (or
equiv) recommended.
Max length = 1650ft
0 – 10V signals Output impedance =
500 Ohm.
Max current drive
capacity = 5mA
Measuring range: 23.6 – 94.6º F.
Resolution: 0.36º F.
Untrimmed accuracy over
range: +/- 2.52º F.
Accuracy over range with
offset: +/- 1.08º F.
Measuring range: 50 – 140º F.
Resolution: 0.36º F.
Accuracy over range: +/- 5.4º F.

4
2 Installation instructions.
2.1 Mounting the Control Assembly
The housing consists of a
two part plastic moulding
held together by four
screws.
• Remove the screws.
• Carefully lift the lid and
unplug the ribbon cable
from the power PCB
assembly situated in the
bottom of the case.
• A drilling template is provided to
enable the controller assembly to
be securely fixed to a solid
surface.
• It is recommended that the
controller is installed no
less than 5ft above the
floor level.
• The lid with display and
connecting ribbon cable
can be rotated through
180° therefore allowing the
controller to be positioned with
the wire entry to the bottom or the top
depending on the cable routing.
• Do not mount the controller on an
excessively warm or cold surface or where it
could be affected by direct sunlight or other
heat/cool sources.
• The mounting surface
should be non-conducting or
grounded and should
prevent access to the rear of
the control.
Note: The recommended minimum
mounting height only applies when
the internal sensor is used.
8 13/16”
7 7/8”
3 5/32”
5”

5
Note: when used in dusty/contaminated
environments it may be necessary to locate
the SmartCom panel within an enclosure (or
locate panel remotely) and use an external
temperature sensor.
2.2 General Wiring Specifications
All wiring connections must be made by a
suitably qualified person.
When making connections to screw terminals
please ensure that no more than 1/4” of
insulation is stripped back and that no stray wire
strands escape.
Please refer to the following wiring connection
drawings and observe the note at the bottom of
each page referring to cable type and length.
Complete installation wiring instruction booklets
are supplied to suit individual heating
applications which can also be downloaded
from our website www.ambirad.com/us
It is important to read both the product
instructions and these control instructions to
ensure satisfactory operation.
Failure to follow these guidelines may result in
electrical interference or unsatisfactory
operation.
Warning
Important: All electrical work should be done by a qualified electrician in strict accordance with
the National Electrical Code ANSI/NFPA 70. or Canadian codes CSA C22.1

6
Terminal No. Connection Wire capacity
41 Vent 1 relay input (¾ Hp/low fan) 12 Awg
40 Vent 1 relay output (¾ Hp/low fan) 12 Awg
7 Heat 2 relay input (2 stage) 12 Awg
8 Heat 2 relay output (2 stage) 12 Awg
9 Burner reset output 12 Awg
25 Vent 3 relay output (damper) 12 Awg
14 Vent 2 relay output (high fan) 12 Awg
5 Time relay output 12 Awg
6 Heat 1 relay output (1 stage) 12 Awg
1/L Live supply input 12 Awg
2/N Neutral supply input 12 Awg
10 Flame failure input 12 Awg
S/R0 Remote room temperature sensor ‘A’ 14 Awg
S/R1 Remote room temperature sensor ‘B’ 14 Awg
D0 Remote duct temperature sensor ‘A’ 14 Awg
D1 Remote duct temperature sensor ‘B’ 14 Awg
O0 Outside air temperature sensor ‘A’ 14 Awg
O1 Outside air temperature sensor ‘B’ 14 Awg
B1 Remote on input (BMS ON input) 14 Awg
B0 Remote common (output to BMS) 14 Awg
B2 Remote frost input (door interlock) 14 Awg
C2 Comms connection ‘A’ input/output (Networking) 14 Awg
C0 Comms connection ‘GND’ output (Networking) 14 Awg
C1 Comms connection ‘B’ input/output (Networking) 14 Awg
66 Channel 1, 0~10V output (GM44) 14 Awg
64 Channel 1 and 2 common output 14 Awg
20 Channel 2, 0~10V output (damper 14 Awg
2.3 SC3MZ WIRING CONNECTIONS
A terminal block is supplied to enable multiple
connections to B0/B2 as detailed in product
wiring connections. 0-10V outputs and remote
switch inputs should be connected by 18Awg
cable of maximum length 325ft. The remote
temperature sensor may be placed at a
distance of up to 325ft (maximum) from the
control unit, using shielded 18Awg cable to
improve noise rejection. Connect the shield to
terminal B0. Master-slave communication is by
shielded twisted pair cable, RS 485 compatible,
such as Belden 9841 (or Equiv). Maximum
overall system length is 1650ft. Connect shield to
B0 and C0. All sensor and signal wiring should
be kept separate from mains wiring to minimise
noise pick-up.
NEUT
LIVE
1/L 2/N 10 S/R0S/R1D0 D1 O0 O1 B1 B0 B2 C2 C0 C1 66 64 20
41407 8 925 145 6 !
! FUSE RATING
T

7
Pressing the UNDO button, at any time will
cancel this operation.
The controller can operate in holiday
mode, with frost protection for a number
of days. When the holiday period
expires the controller returns to normal
operation. Pressing the UNDO button, at any
time will cancel this operation.
Pressing the CHECK TEMP button will
display the sensor (room) temperature
on the first press and the set (program)
temperature on the second press. The third
press will return the display to normal.
Pressing the LOCKOUT button will clear
a flame failure lockout. In order to reset
the lockout, press and release the
LOCKOUT button. After 10 seconds the
controller will return to normal operation. The
lockout warning and LED will continue to display
if the flame failure signal is cleared at source.
Note:
If no keypad action takes place for 60
seconds, the current selection is cancelled
and the display returns to day and time and
previously set operating mode.
* Exam Heating mode (EH) will appear only if
selected in the engineer functions.
The ten buttons have the following functions:
Press the + button to increase a value.
Press the - button to decrease a value.
Press the OK button to accept the value
and advance to the next display.
Press to cancel overtime, vent, exam*,
OFF and holiday modes or to cancel a
setting but save any previous changes.
Initialise and step through programming
modes.
Pressing the FAN ONLY button will
force the controller to operate Vent 1
relay regardless of the room
temperature while Heat relays are disabled.
Pressing the UNDO button, at any time will
cancel this operation.
Pressing the OVERTIME button in an
OFF period will initiate or extend the
day-time operation of the controller.
3.2 The Buttons
OFF time 16:30 Mon to Fri
(no further ON/OFF times set or weekends)
Program mode Auto
Control type Warm Air*
Sensor type Internal*
Night setback On*
Frost protection On*
Networking Off*
Pin protection Off*
* can be altered within Engineers settings if required.
3.1 Factory default settings
For speedy installation and ease of first
operation, the SmartCom³ is supplied from the
factory with pre-programmed default settings.
These are:
On / Day temperature 64°F
Off / Night temperature 41°F
ON time 08:00 Mon thru Fri
3 Operating instructions.

8
3.3 The SETTINGS button
Pressing the SETTING button will scroll
through the user options in the following
sequence. Repeated pressing of this
button will loop these options round to the start.
Allows the user to set
the hour, minute, day,
month and year.
OK =yes SET =next
SET PROGRAM?
OK =yes SET =next
SET MODE?
OK =yes SET =next
SET TEMPS?
OK =yes SET =next
SET SYSTEM OFF?
OK =yes SET =next
SET CLOCK?
OK =yes SET =redo
Menu End
Th 09 : 30
AUTO ON
Allows the user to set
up to 3 time period per
day. Automatic copy
function available.
Allows the user to set
the operating relevant
mode to the application.
Allows the user to set
day and night
temperatures.
Allows the user to
switch all functions to
an OFF status.
press
press
press
press
press
press
press or
Th 09 : 30
AUTO ON

9
3.4 Setting the Clock
Press the SETTING button till
SET CLOCK? appears in the display.
Press the OK button to change this user
mode.
Value to alter/confirm will start flashing.
OK =yes SET =next
SET PROGRAM?
follow ‘Setting the PROGRAM’ menu
Th 09 : 29
AUTO ON
+ or - then OK
SET Day Mo 09 : 29
+ or - then OK
SET Day Mo 09 : 29
+ or - then OK
SET Hrs Mo 09 : 29
+ or - then OK
SET Mns Mo 09 : 29
OK =yes SET =redo
Menu End
OK =yes SET =next
SET CLOCK?
repeat above procedure
Use the + button to increase the value.
Use the - button to decrease the value.
Press the OK button to accept the value
and advance to the next display.
Press the UNDO button to cancel setting
but save any previous changes.
Clock will automatically
compensate for US
daylight saving dates.
press or
press or
SET Mon 06 0918 --
+ or - then OK
SET Dat 06 0918 --
+ or - then OK
SET Yr 06 0918 --
+ or - then OK

10
3.5 Setting the Programs
Press the SETTING button till
SET PROGRAM? appears in the
display.
Press the OK button to change this user
mode.
Value to alter/confirm will start flashing.
OK =yes SET =next
SET PROGRAM?
Use the + button to increase the value
in 10 minute steps.
Use the - button to decrease the value.
the value in 10 minute steps.
Press the OK button to accept the value
and advance to the next display.
Press the UNDO button to cancel setting
but save any previous changes.
+ or - then OK
Mo ON 2 17 : 30
+ or - then OK
Mo OFF 2 20 : 00
+ or - then OK
Mo ON 3 - - : - -
+ or - then OK
Mo ON 3 20 : 30
+ or - then OK
Mo OFF 3 22 : 00
OK =yes SET =next
Copy to Tu
OK =yes SET =next
Copy to Tu
follow copy function menu
follow copy function menu
+ or - then OK
SET Day Mo
+ or - then OK
Mo ON 1 08 : 00
+ or - then OK
Mo OFF 1 16 : 30
OK =yes SET =next
SET MODE?
+ or - then OK
Mo ON 2 - - : - -
OK =yes SET =next
Copy to Tu
follow copy function menu
follow ‘Setting the MODE’ menu
If the - button is
pressed at an unused
time slot “--:--”, the screen
advances to a further ON
time. The new ON time will
start flashing.
3 timeslots per day
(each timeslot includes
an on and off time) are
allowed.
Pressing the OK
button at an unused
time slot “--:--”, will display
the automatic copy function.
(see next page).
Press OK to copy day
settings.
Press SET to alter times for
that day.
press or
press or
press or

11
Setting the Program …...cont.
3.5.1 Copy Function
Press the SETTING button till
SET PROGRAM? appears in the
display.
Press the OK button to change this user
mode.
Value to alter/confirm will start flashing.
OK =yes SET =next
Copy to Tu
OK =yes SET =next
Copy to We
+ or - then OK
SET Day Tu
OK =yes SET =next
Copy to Th
OK =yes SET =redo
MENU END
OK =yes SET =next
Copy to Fr
OK =yes SET =next
Copy to Sa
OK =yes SET =next
Copy to Su
Th 09 : 40
AUTO ON
+ or - then OK
SET Day Mo
follow ‘Setting the PROGRAM’ menu
follow PROGRAM menu
Use the + button to increase the value.
Use the - button to decrease the value.
the value.
Press the OK button to accept the value
and advance to the next display.
Press the UNDO button to cancel setting
but save any previous changes.
Press OK to copy day
settings.
Press SET to alter times for
that day. (follow previous
page)
press or
press or

12
3.6 Setting the Mode
Press the SETTING button till
SET MODE? appears in the display. Press the OK button to change this user
mode.
Use the SET button to advance to the
next display.
Press the OK button to accept the value
and advance to the next display.
Press the UNDO button to cancel setting
but save any previous changes.
OK =yes SET =next
SET EXAM MODE?
OK =yes SET =next
SET FROST ONLY?
OK =yes SET =next
SET HEAT ONLY?
OK =yes SET =next
SET FAN ONLY?
OK =yes SET =redo
Menu End
Th 09 : 30
HEAT ON
OK =yes SET =next
SET AUTO MODE?
repeat procedure above
Exam Heating mode:
If the control is used
on a system installed in a
sports hall, a temporary
increase in temperature can
be set to improve comfort for
people sitting in the building.
Heating will be controlled to
“temperature 2”. Exam
Heating mode can only be
set during an ON period and
will last only until the next
OFF period unless cancelled
by the UNDO button.
Heat Only mode: Heating
operates automatically
depending on the room
temperature, time/set
temperature program and
the control method selected.
Ventilation is disabled.
Pressing SET at ‘Menu
End’ will scroll round
back to the first mode
setting.
OK =yes SET =next
SET AUTO MODE?
OK =yes SET =next
SET TEMPS?
follow ‘Setting the MODE’ menu
OK =yes SET =next
SET MODE?
Press SET to advance
to the next mode to
choose. Press OK to accept
new mode.
Auto mode: Heating and
ventilation operate
automatically depending on
the room temperature, time/
set temperature program
and the control method
selected. Ventilation is
disabled during off periods
of the time program.
Frost Only mode: Heating
operates automatically
depending on the room
temperature and control
method selected. The set
temperature is fixed at 41°F.
Ventilation is disabled.
Fan Only mode: Ventilation
operates automatically
depending on the room
temperature, time/set
temperature program and
the control method selected.
Heating is disabled.
Ventilation is disabled during
off periods of the time
program. press or
press or
press

13
*Note: Exam heating mode will only appear if selected in the engineers functions.
3.7 Setting the Day and Night Temps
Press the SETTING button till
SET TEMP? appears in the display.
Press the OK button to change this user
mode.
Value to alter/confirm will start flashing.
+ or - then OK
DAY TEMP 60 . 0 O F
Menu End
OK =yes SET =REDO
OK =yes SET =next
SET TEMPS?
+ or - then OK
EXAM TEMP 66 . 0 O F
+ or - then OK
NITE TEMP 41 . 0 O F
OK =yes SET =next
SET SYSTEM OFF?
+ or - then OK
DAY TEMP 66 . 0 O F
Th 09 : 30
AUTO ON
follow ‘SYSTEM OFF’ menu
repeat above procedure
Use the + button to increase the value.
Use the - button to decrease the value.
Press the OK button to accept the value
and advance to the next display.
Press the UNDO button to cancel setting
but save any previous changes.
* If the control is used
on a system installed
in a sports hall, a temporary
increase in temperature can
be set to improve comfort for
people sitting in the building.
Heating will be controlled to
“temperature 2”.
Exam Heating mode can
only be set during an ON
period and will last only until
the next OFF period unless
cancelled by the UNDO
button.
press or
press or

14
3.8 Setting the System OFF
Press the SETTING button till
SET SYSTEM OFF? appears in the
display.
Press the OK button to change this user
mode.
Value to alter/confirm will start flashing.
OK =yes SET =next
SET CLOCK?
OK =yes SET =next
SET SYSTEM OFF?
UNDO = reset
SYSTEM OFF
OK =yes SET =redo
Menu End
Th 09 : 32
AUTO ON
Th 09 : 32
AUTO ON
Repeats User settings.
follow CLOCK menu
Use the SET button to advance to the
next display.
Press the OK button to accept the value
and advance to the next display.
Press the UNDO button to cancel setting
and revert to original contol.
Press UNDO at any
time to cancel
SYSTEM OFF. System will
revert to original control.
press or
press orpress

15
3.9 Optional Password (PIN protection)
To protect the entered settings, you can use a
password PIN code. This unique 4 digit PIN
code will be required to change the settings that
you have stored and will prevent unauthorised
amendment of the settings.
Refer to the Engineers Settings of this
manual to activate this option.
Note: PIN protection is not initiated as a default
setting.
N ENTER
+ /- /OK
3254
I
P
3250
I
P
3250
I
P
3200
I
P
3200
I
P
3000
IP
3000
I
P
+ /- /OK
0000
I
P N ENTER
+ /- /OK
N ENTER
+ /- /OK
N ENTER
+ /- /OK
N ENTER
+ /- /OK
Th 09 : 32
AUTO ON
N ENTER
+ /- /OK
N ENTER
+ /- /OK
N ENTER
Use the + button to increase the value.
Use the - button to decrease the value.
the value.
Press the OK button to accept the value
and advance to the next display.
Press the UNDO button to cancel setting
but save any previous changes.
Press + or - button to
set the first number
then press the OK button.
The next digit will start
flashing to be set.
Continue till last number is
entered.
The final press of the OK
button will allow settings to
be modified.
PIN 3254 shown opposite
is an example only.
*If you forget the PIN code there is a Master PIN code that is factory set by the manufacturer.
This Master PIN code over-rides the unique PIN code and will enable you to change the PIN code
again. Please call your local distributer for this Master PIN code.

16
The holiday period will start at midnight on the
day that it is initiated. From then on the
‘HOLIDAY’ along with the remaining number of
days will be displayed. When the holiday period
expires the controller returns to normal
operation.
Pressing the UNDO button, at any time will
cancel the holiday period.
3.12 Setting an overtime extension period
Pressing the OVERTIME button in an
OFF period will initiate or extend the
day-time operation of the controller.
Overtime is activated as follows:
Press the OVERTIME button. ‘OVERTIME’ will
be displayed and the hours and minutes digits
will flash.
Press the + or – buttons to increase or decrease
the required amount of time in 10 minute
increments. (Values between 0 and 60 minutes
are acceptable by default. The range can be
extended up to 10 hours in the Engineer
Functions).
Press OK to accept the setting. The display will
show the overtime minutes remaining. When the
overtime period expires the controller returns to
normal operation.
Pressing the UNDO button, at any time will
cancel this operation.
3.13 Setting a temporary Fan period
Pressing the FAN ONLY button will force
the controller to operate Vent 1 relay
regardless of the room temperature
while Heat 1 and Heat 2 relays are disabled and
Vent 2 and Vent 3 relays operate according to
the room temperature. The FAN ONLY period is
activated as follows:
Press the FAN ONLY button. ‘FAN ONLY’ will be
displayed and the hours and minutes digits will
flash.
3.10 Checking the temperature
Pressing the CHECK TEMP button will
display the sensor (room) temperature
on the first press and the set (program)
temperature on the second press. The third
press will display the *outside temperature if set
within engineer settings or return the display to
normal.
NB. The display will return to normal 10
seconds after the second press if CHECK
TEMP is not again.
Pressing the CHECK TEMP and the + button
together will display the duct temperature (if
fitted) . The display will return to normal after 10
seconds if not cancelled by UNDO.
3.11 Setting a temporary Holiday period
The controller can operate in holiday
mode, with frost protection, for a
number of days. The holiday mode is
set as follows:
Press the HOLIDAY button. ‘HOLIDAY’ will be
displayed and the number of days will flash.
Press the + or – button to increase or decrease
the number of holiday days. (Values from 00 to
31 are acceptable). Zeros ‘00’ indicates no
holiday period set.
Press the OK button to accept the holiday
setting. ‘HOLIDAY SET’ will be shown along
with the normal display until the start of the
holiday period.
SET TEMP 64 . 0 O F
I
HOL I DAY + /- /OK
0days
+ /- /OK
7daysDAYHOL
HOL I DAY SET
Fr 16 : 58
I
I
OVERT
+ /- /OK
ME 00 : 00
+ /- /OK
02 : 00OVERT
OVERT I ME 0 1 : 59
UNDO = reset
ME
61 . 6 O FROOM TEMP
O/S TEMP 58 . 0 O F
*

17
This warning will continue to display until the
next time switch or until the undo button is
pressed.
3.14.3 Optimum Start and Optimum Stop.
This feature is factory set. If not required, refer to
the Engineer Functions. Optimum start is an
energy saving feature which turns the heating
system on at the latest possible time, whilst
ensuring that the desired temperature is
achieved at the ON time.
When the controller is optimising, the following is
displayed. Ventilation remains disabled during
the optimum start period.
Towards the end of a heating period the
controller may turn off the heating early.
The optimum stop period is calculated and
relates to the speed of response of the building.
The optimum stop period is a factor of the
optimum start historical information and will be
limited to the maximum time period set in the
engineer functions. The controller will only allow
the temperature to fall by up to 3.6°F below the
set point during this period. Ventilation is
disabled during the optimum stop period.
When the controller is optimising, the following is
displayed.
3.14.4 Service Hours
The controller has a programmed burner hour
limit. This is default at 1200 hours but can be
adjusted within the Engineers codes.
Once the heater has reached this set limit, the
screen will show A SERVICE HOURS display to
register that a service is due.
3.14.5 External sensor fault indication
If an external sensor is used/set within Engineers
settings but the sensor is open circuit, the display
Press the + or – buttons to increase or
decrease the required amount of time in 10
minute increments. (Values between 0 and 60
minutes are acceptable by default. The range
can be extended up to 10 hours in the
Engineer Functions).
Press OK to accept the setting. The display will
show the overtime minutes remaining. When
the overtime period expires the controller
returns to normal operation.
Pressing the UNDO button, at any time will
cancel this operation.
3.14 Display Messages.
3.14.1 Lockout Error
When the controller detects a flame failure
signal, the screen will show a LOCKOUT
display and the red LED will illuminate.
The lockout warning and LED will
continue to display if the flame failure
signal is cleared at source.
In order to reset the lockout, press and release
the LOCKOUT button. After 10 seconds the
controller will return to normal operation.
NB. The lockout will not be displayed for the
first 45 seconds after initial burner start. Fan
and heating outputs will continue to function
normally despite the lockout condition.
3.14.2 Exam period
If the control is used on a system installed in a
sports hall, a temporary increase in
temperature can be set to improve comfort for
people sitting in the building. The screen will
show an EXAM MODE display.
FAN ONLY
+ /- /OK
0 1 : 00
FAN ONLY 00 : 59
UNDO = reset
ARN I NG
M
!
LOCKOUT
Th 09 : 32
EXAM MODE
We 07 : 32
AUTO OPT ON
We 16 : 26
AUTO OPT OFF
Th 09 : 32
SERV CE HOURSI
00 : 00
+ /- /OK
FAN ONLY

18
will the following error:
3.14.6 External Inputs
There are two external inputs for direct control
of the operating mode of the system.
The ON input forces the controller to operate in
the on mode for as long as the input is active
(switch closed). This could be used for an
override on switch or for BMS control.
Note: If the controller is to be used in a BMS
system then all of the ON times should be set
as unused, then the controller will by default
control at off/night temperature. The BMS
system can then activate on/day or frost
temperature control using the external inputs.
The FROST input forces the controller to
operate in the frost mode for as long as the
input is active (switch closed). This could be
used as a holiday switch or an off switch or as a
door interlock to turn the heating off when a
door is open or for BMS control.
In addition the remote Frost input can be
assigned under engineers menu to act as a
multipurpose alarm input, blocked filter alarm
input or an air flow failure alarm input with
contacts closed for fault condition, open for
good condition.
In blocked filter mode the control will display the
following warning with the time and operation
continuing as normal.
NB. The controller will ignore the input for the
first 30 seconds
In air flow failure mode the control will display
the following warning with heating operation
suspended until a lockout reset operation is
performed.
NB. The controller will ignore the input for the
first 30 seconds.
As a multipurpose alarm the control will display
“REMOTE OFF - CHECK” and the heating
operation will be suspended until the fault is
corrected.
NB. The controller will ignore the input for the
first 30 seconds
Further in a multi-zone system air flow failure on
a slave will be displayed on the Master as a
lockout with the zone number and lockout reset
can be achieved either locally on the affected
slave or centrally using the Master controller.
As a multipurpose alarm the input will be
effective at all times, whereas in air flow failure
and blocked filter modes the controller will ignore
the input until 30 seconds from the start of either
the heat or time relays as set under the
engineers menu.
In a multi-zone system the external inputs to the
Master controller will be applied to all zones
automatically, however individual zones can be
set to ignore the FROST signal from the Master
under the engineers menu. The external inputs
to a slave controller will apply to that zone only.
3.14.6.1 Priority order of controlling
items.
If ON and FROST inputs are both active then the
FROST input will take priority.
Where more than one input or setting is trying to
operate the control it will respond to inputs in the
following priority order:
1. Remote Frost input
2. Overtime (operating with NORMAL/HEAT
ONLY/VENT ONLY)
3. Vent mode
4. Holiday
5. Off mode
6. Frost Only
7. Remote On (BMS) input (operating with
NORMAL/HEAT ONLY/VENT ONLY)
8. Time program (operating with AUTO/
HEAT ONLY/VENT ONLY)
FROST ONLY
EXTERNAL / DOOR
ARN I NG
M
!
BLOCKED F LTER
I
ARN I NG
M
!
REMOTE OFF - CHECK
ARN I NG
M
!
LOCKOUT
I
ARFLO
M
AUTO
EXTERNAL / BMS
ROOM TEMP -23 . 0 O F

19
3.15 Network Controllers
With the SmartCom³ MultiZone version up to 16
controllers can be linked together to form a
multi-zone heating system. This allows one
SmartCom³ (the Master) to communicate with
the other controllers (the slaves). The display
will state the appropriate zone number.
The Master control has the following
capabilities:
• Updating the clock on the Master controller
will globally update the slave controllers.
• The set program and set temperature
functions on the slave controllers can be
accessed from the Master controller.
• The room and set temperatures of the slave
controllers can be viewed from the Master
controller.
• VENT ONLY, HOLIDAY, or OVERTIME
buttons on the Master controller are applied to
the entire network.
• External inputs to the Master will apply to the
entire network.
• Lockouts' on slave controllers will be
displayed on the Master controller and can
then be cleared on each individual controller
or from the Master controller.
The following functions cannot be programmed
over the network and must be carried out locally
on each slave controller:
• Modes, i.e. HEAT ONLY, AUTO, etc.
• Engineer functions.
Refer to the Engineers Settings of this
manual to activate this option.
3.15.1 Operating the Master
When operating the Master controller on a
multi-zone system to modify a program or the
set program/check temperature, the display will
show ‘SET Zone’ along with the flashing zone
number.
Press the + or – button to display the
appropriate zone you want to use.
Press OK to accept. The program and
temperatures can now be set for that zone.
If a fault occurs in the network or the set up is
incorrect, an error message will appear and
flash in the Master controller showing the
(first) appropriate zone fault.
Once the comms error has been rectified, the
display will change to show either a further
comms error or back the main screen.
If a lockout occurs within a zone, the Master will
display ‘Lockout’ and the appropriate zone that
has the fault.
To reset the lockout, press the
LOCKOUT button either on the Master or
the Slave controller to that particular
zone.
+ or - then OK
SET Zone 1
ARN I NG Zone 2
M
!
LOCKOUT
Th 09 : 30 Zone 2
AUTO ON
Th 09 : 30 Zone 1
COMMS ERR Zone 6

20
4.2 Settings
4 Engineers Settings.
4.1 Introduction
The engineer functions allow you to program
various advanced parameters.
• All control functions may be optionally
password protected by a PIN code.
• Pressing the UNDO button during
programming will cause the setting being
programmed to be changed back to its
original value.
• Pressing the UNDO button twice,
consecutively, at any time while in the
engineer function, will cause the controller to
exit the engineer function and return to
normal operation. Only items which have
been OK’d will be changed.
• If no keypad action takes place for 60
seconds while in the engineer function, the
controller will exit the engineer function and
return to normal operation. Only items which
have been OK’d will be changed.
• The engineer settings cannot be programmed
over the communications link, only on the
specific controller.
In order to access the engineer functions:
Press and hold in the button and at the same time, press the button.
press or
press
press
press
follow ‘WARM AIR’ SETTINGS’
…….etc
To aid the on-site engineer, the settings
have been arranged by heater type. The
default setting is radiant. For Warm Air,
simply alter the control type by using this
procedure.
Once the control type has been set, follow
the variables as described in the next
procedure.
Use the - button to toggle between /
decrease the value.
Press the UNDO button to cancel
settings but save any previous changes.
Press the SETTINGS button to advance
to the next display.
Press the OK button to alter a setting or
accept the a new value.
Use the + button to toggle between /
increase the value.
OFF SET/OK
DF & DFI +/-/OK
IANTRAD
CONTROL TYPE
A I R
M
ARM +/-/OK
CONTROL TYPE
ON SET/OK
NTERNAL SENSORI
A I R
M
ARM SET/OK
CONTROL TYPE
+/-/OK
IANTRAD
CONTROL TYPE
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