Smart Temp ISIS User Manual
Smart Temp
TM
Congratulations on the purchase of your new Electronic Thermostat!
Your new Smart Temp ISIS thermostat has been built using the best components and design
philosophy currently available. As a result, if properly installed your new electronic programmable
thermostat will provide you with many years of trouble free and reliable service.
Your Smart Temp ISIS Thermostat has been designed to be an attractive, highly reliable and easy
to use thermostat. By taking the time to read and understand these simple instructions you can
take advantage of many of the capabilities that are offered in the ISIS.
Overview
To assist in your understanding and use of the Isis, a brief description of the
functions and controls is given below. A more complete step-by-step
instruction on using the ISIS is given later in the manual.
ON / OFF Button
To turn the ISIS on, press the ON/OFF button. To turn the ISIS off press and hold the
ON/OFF button for 3 seconds. The Green ON/STBY LED will be illuminated when the
ISIS is on.
Set Buttons
The set (or desired) room temperature can be adjusted by pressing the plus or minus
SET buttons on the face of the ISIS. Each press will increase or decrease the set
temperature by 1 deg C. The ISIS is a single set point thermostat. For example, setting
the desired temperature at 21 deg C will bring on the AC heating if the room
temperature falls below 20 deg C and bring on the AC cooling if the room temperature
raises above 22 deg C. (Depending on the Deadband values set by the installer)
Prog Button
The ISIS is a 7 day programmable thermostat. This programmability permits you to set
the days and times that the ISIS automatically turns you AC System on and off. You
access these settings from the PROG button.
Clock Button.
The ISIS relies on an inbuilt real time clock to turn the system off and on at the times
required. The Clock button is used to set this real time clock.
OVERRIDE button
Pressing this button will turn the AC system on (in the last mode and at the last set
temperature) for an installer pre-set period of time. This override can be activated
regardless of whether the ISIS is in the manual OFF mode (Green ON/STBY LED off),
or the programmed STOP mode (Green ON/STBY LED on). When the override is
active a flashing clock symbol will be shown in the lower centre of the LCD.
To turn off the override simply press the OVERRIDE button once again.
Mode Button
The MODE button cycles the ISIS through Heat only, Cool Only, Auto-Change over or
Fan only operational modes. These modes are detailed below.
Heat only mode
The ISIS will turn on the AC Heating when the room
temperature falls below the set temperature. In Heat only mode the ISIS will
not bring on the AC Cooling regardless of the room and Set Temperature. In
Heat only mode the word “HEAT” will be displayed in the LCD.
Cool only mode -
The ISIS will turn on the AC Cooling when the room
temperature raises above the set temperature. In Cool only mode the ISIS will
not bring on the AC Heating regardless of the room and Set Temperature. In
Cool only mode the word “COOL” will be displayed in the LCD.
Auto-change over mode
- The ISIS will turn on the AC Heating if the room
temperature falls below the SET temperature and the AC Cooling if the room
temperature rises above the SET temperature. Auto changeover mode is
indicated by words, “HEAT” & “COOL” in the LCD.
Fan Only mode.
In Fan only mode the ISIS will turn on the system fan for
continuous operation. The ISIS will not control the AC heating or cooling
system regardless of the room and set temperature. In Fan only mode a small
fan symbol will appear in the lower left of the LCD.
Auto Fan Button
The ISIS can control the system fan in two ways. Each press of the Auto Fan button
alternates the ISIS between Auto fan mode or continuous (Occupied) fan mode.
Auto Fan Mode
- The fan will run only while the AC system is heating or
cooling. When the need for Heating or cooling stops, so does the fan.
Continuous Fan Mode
(Occupied Fan). - In this mode, the fan will turn on
when the ISIS is on and remain on until the ISIS turns off. The fan will remain
on during this time regardless of whether there is a need to bring on the AC
system heating or cooling.
Please note - As the ISIS is a start / stop thermostat, when the system is OFF
(either in programmable or manual modes) the fan is also off.
Alarm / Limits
This button has multiple functions. It is
used to enter the LOCK menu, the installer
menu and to cancel any equipment fault, over
or under temperature alarms that are present.
These functions are described later in the document.
ON/STBY LED
As the ISIS has two operational modes, two descriptions of this LED's
functions are given.
The ISIS in manual ON/OFF Mode.
This LED is illuminated when the ISIS is active and is not illuminated
when the ISIS is off.
This LED flashes when the 4-minute compressor short cycle protection
delay is active.
The ISIS in Programmable Mode.
This LED is always illuminated regardless of whether the ISIS is in Start
(System running) or Stop (System off) mode to indicate that the AC
system is under ISIS control.
This LED flashes when the 4-minute compressor short cycle protection
delay is active.
ALARM LED
As well as being an AC controller, the ISIS is also capable of activating a remote
alarm should the room temperature fall out of a pre set temperature range. As well
as an alarm LED, the ISIS is also fitted with a normally open contact that closes
when an alarm condition exists.
If the AC equipment is fitted with a fault output, this can also activate the Alarm led
and fault relay if appropriately wired.
For security and convenience the ISIS may be
installed in a more remote or secure location. In
such applications the ISIS will measure the
temperature in the room to be controlled via a
remotely connected temperature sensor(s). Pict 1
shows the Smart Temp adjustable version of this
sensor.
It is important that consideration is given to this
sensor as placing hot items (such as kettles or
urns) or cold items (such as chest freezers) under
or in the vicinity of these sensors could result in
uncomfortable room temperatures.
Smart Temp
Pict 1
Important Considerations
Remote Sensors
The ISIS has an after hour run on timer. This timer can be activated by pressing the
OVERRIDE button on the front of the thermostat, or alternatively via a remotely
wired switch.
(Often, where there is a remote sensor installed and the override
option is used, the override switch will be mounted on the remote sensor).
To turn off the override simply press the override switch again.
For added security and to prevent un-authorised tampering with the ISIS program or
temperature settings the ISIS has a PIN protected key board lock. When this lock is
active, the only buttons that will respond are the OVERRIDE button and the Alarm
Reset button.
The procedure to lock and unlock the ISIS is provided in the Installation manual.
Only authorised persons will pe provided with this information in an effort to maintain
the security of the thermostat.
Override
Keyboard Lock
Making Life Comfortable
User Manual
Smart Temp
Australia
Making Life Comfortable