TM
Smart Temp
Model ETN-HP22/3S
Thermostats
Operating Instructions
24 Volt Two Stage Heat Pump thermostat
with 3 Speed Fan
Auto Changeover - Non Programmable
Congratulations on the purchase of your new
Electronic Thermostat!
Your new Smart Temp ETN thermostat has been built using the best
components and design philosophy. As a consequence of this, if properly
installed your new electronic programable thermostat will provide you with
many years of trouble free and reliable service.
The Smart Temp ETN has been designed to be attractive, highly reliably and
simple to use. Please take the time to read these simple instruction to
familiarise yourself with the function and features offered in this product.
To turn the System On
With each press of the “ON” button, the ETN will toggle between “On” and “Off” mode. The ETN retains in memory the last temperature set point
and operational mode. These values are used when the ETN is turned on.
To Adjust the Set (or desired) Room Temperature
When no buttons are pressed, the LCD indicates the current room temperature. When the up (+) or down (-) buttons is first pressed the LCD will
flash rapidly and indicate the Set (or desired) room temperature. The word “SET” will also be displayed in the LCD to confirm the set temperature is
being adjusted.
When the desired set temperature is shown and there are no further button presses the LCD will stop flashing and again indicate the current room
temperature. The new desired room temperature is now active and the ETN will control the Air Conditioning system to archive this new desired
temperature.
To select the System Modes (First press of the Mode Button)
Pressing the “Mode” button once will permit you to select the operational mode of the thermostat and by pressing the (+) or (-) buttons select these
modes. The modes available are Heat only mode, Cool only mode, Auto mode (Indicated by the words Heat & Cool in the LCD) or fan only modes.
Pressing the Mode button again will permit you to Select the Fan Control mode and select your desired fan mode by using the (+) or (-) buttons. The
two fan options are Auto Fan Mode or Continuous Fan Mode. Pressing the Mode Button again will return the ETN to normal operation.
Heat Mode: In heat mode, the thermostat will only activate the system heating when the room temperature falls below the set (or desired)
room temperature. Heat will be displayed in the LCD to indicate this mode is set. When the ETN is calling for the system to heat, the word
“HEAT” will flash slowly in the LCD. In this mode, the ETN will not turn on the Air Conditioning equipment to cool the room.
Cool Mode: In cool mode the thermostat will only activate the system cooling when the room temperature raises above the set (or
desired) temperature. Cool will be displayed in the LCD. When the ETN is calling for the system to cool, the word “COOL” will flash slowly
in the LCD. In this mode, the ETN will not turn on the Air Conditioning equipment to heat the room.
Auto Season Change over Mode: In Auto mode the thermostat will automatically activate the system heating or cooling to maintain the
set (or desired) temperature to within +/- 0.8 Deg C (approx). For example, if the set temperature is 21 deg C, the ETN will activate the
system cooling when the room temperature raises to 22 deg C and activate the system heating if the room
temperature falls to 20 deg C. The LCD will indicate Auto Season Mode by displaying both “Heat & Cool” in the
LCD. When the ETN is calling for the system to heat or cool the appropriate word will flash slowly in the LCD.
Fan only Mode: In fan only mode the ETN will only run the system fan regardless of the set and room
temperature. The ETN will not attempt to control the Air Conditioning System heating or cooling functions.
Fan only mode is typically used to improve building ventilation and not to control room temperature.
To select the Fan Mode (Second press of the Mode Button)
Continuous Fan Mode
In Continuous Fan mode the system fan will run 24 hours per day, but unlike the Fan Only mode described
above the ETN will also control the room temperature as dictated by the Heating, Cooling or Auto modes
set above. The ETN will indicate that this mode is active by displaying the word “Fan” in the lowest section
of the LCD.
Auto Fan Mode
In Auto Fan mode the ETN will only turn on the system fan on when there is a call for system heating or
cooling and off again when the room is at the desired temperature. The LCD will indicate that this mode
is active by displaying the words “Auto Fan” in the lowest section of the LCD.
To select the Fan Speed (Accessed with the “Fan” Button).
The ETN has the ability to control the system fan through 3 fixed fan speeds. Low, Medium and High
Speed. Further in Auto fan speed mode (indicated by all three speeds being shown in the LCD) the
ETN will automatically increase or decrease the fan speed depending on the differential between
room temperature & set temperature. The Current Fan speed is Indicated by the appropriate word
flashing in the LCD.
Optional Remote Control
Adjusting thermostat functions
Room & Set
Temperature
Display
Thermostat
Status
Indication
1st Press
2nd Press
3rd Press
Mode
Temp (+) & (-) button to select
Heat Mode
Cool Mode
Auto Mode
Fan Only Mode
Mode
Temp (+) & (-) button to select
Cont. Fan
Auto Fan
Mode
Exit
Mode
Indication
Auto or Cont
Fan Status
Display
Thermostat
ON / OFF
Button
Thermostat
Mode Select
Button
Economy Comfort Mode. (EC)
Your ETN thermostat is fitted with a unique Economy Comfort or Holiday mode.
The EC mode sets the thermostat mode to Auto changeover mode and limits fan
speed to low (Auto fan mode). In EC mode the thermostat will activate system
heating when the room falls below 10°c and system cooling when the room
temperature is above 30°c.
The EC mode is ideal for situations where you do not with the home to overheat
or freeze during holidays or long periods of un attendance.
22
Heat
Hi
Cool
Med
Fan
Lo
Auto Fan
Mode
On
Thermostat
Fan Speed
Button
On
Off
Set
+
-
Fan
Temperature
Up Button
Temperature
Down Button
Fan Speed
Indication
IR Remote
Receiver
Internal Connection
Rev Valve
Fan Lo
Comp1
Comp2
O/B
Y1
Y2
I.R. Remote Control Option
G3
G2
Fan Med
G1
alled
be inst
st
24Vac
Supply
mu
ink
Fan High
L
Rc
C
Rh
To activate EC mode simply press and hold the On/Off button for 5 seconds. The
letters “EC” will be displayed on the thermostat to confirm this mode is active.
To turn off the EC mode simply press and hold the On/Off button for 5 seconds.
The thermostat display will return to normal.
To access the Service Mode
When commissioning the ETN thermostat ensure the following two setting match the
requirements of the Air Conditioning equipment being used.
1. Reversing valve to be energised on heating or cooling and
2. 3 Min compressor delay On or Off.
To adjust these setting follow the steps below
1. Adjust the set temperature to 10 deg C using the Temp (+) and (-) buttons.
2. Press and hold the Mode button for 10 seconds. “HC” will appear on the LCD.
One letter, either the “H” or “C” will be flashing (selected).
3. Pressing the up (+) or down (-) buttons will toggle between “H” (Rev Valve Energise in
Heating (Default)) or “C” (Reversing Valve energise in cooling).
4. Press the Mode button again and now “30” will appear on the LCD.
One number, either the “3” or “0” will be flashing (Selected).
3. Pressing the up (+) or down (-) buttons will toggle between
“3” (3 minute time delay on (default)) or “0” (0 minutes time delay).
4. Press the Mode button again to return the ETN to normal mode.
The modes selected will now be active.
Note: Please return the thermostat temperature settings to normal (i.e. Not 10 deg C)
(Service Personnel only)
Your ETN thermostat is equipped with an Infra
Red (I.R.) receiver. With the Optional IR
remote control (pictured over) you are able
to control thermostat functions from a distant
location within the same room.
Contact Smart Temp Australia on (03) 9899
6455 for additional information on this
remote control.
Specifications
Range: 5° to 30° c.
Resolution: 1.0°c
Accuracy: 0.3°c
Dead Band: 0.8°c
Stage Delay: 1.2° c
EC Settings: 10°c & 40°c
Load rating: 2Amps.
Voltage: 24VAC.
Connectors: Screw type.
Material: PC/ABS
Size: 80 x 90 x 22mm
Flamability: UL 94V-0
Weight: 145g
Warranty: 2 years
I.R. Receiver: Installed
SW Version: 4FAB
Smart Temp Australia Pty Ltd
19 Indra Road Blackburn South 3130
Phone:(03) 9899 6455 Fax (03) 9899 6454
www.thermostat.com.au
Smart Temp
Australia
Making Life Comfortable
Loading...