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Installer Manual A4100 Thermostat Ver 1.0   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This document it not typically left with the user as it contains information on setting 
values which, if not correctly set may damage the heating, cooling or air conditioning 
system or seriously effect its performance or energy consumption. 
Great effort has been taken to making the A4100 thermostat system intuitive, reliable 
and easy to install. Using a common sense approach to the installation will ensure this 
product is installed easily and to the customer’s satisfaction. Please read and 
understand this instruction manual so that installation, testing and commissioning 
process is undertaken in an efficient and effective manner.   
This manual is to be used in conjunction with the supplied user manual. 
Great care has been taken in the preparation of this manual. It is the responsibility of the 
user to ensure this thermostat, or the equipment connected to it is operating to their 
respective specifications and in a safe manner.   

Installation 

As with any air conditioning project undertaken, careful installation is the key to a 
successful outcome. Time taken during this installation process will be rewarded by a 
happy customer and fewer call

backs.  

The steps required to install the A4100 thermostat are 
1. Read and understand this manual and the User manual. 
2. Mount the A4100 back plate in a suitable location.   
3. Set the 8 DIP switches to match the need of the project / user.   
4. Wire the optional remote temperature sensor(s) or switches if required.   
5. Power up the air conditioning system. 
6. Set the installer software options (if required).   
7. Program and set up the A4100 thermostat. (The User Manual will assist with this). 
8. Test the heating, cooling and other functions 

 Commissioning. 

For convenience the layout of this manual is in the same order as the steps listed above. 

Mounting the wall controller   
 
 
 
 
 
 
 
 
 
 
 
 
 

 
The A4100 can only be as accurate as the onboard temperature sensor, or its optional 
remote temperature sensor(s) permit. It is therefore essential that the wall thermostat be   
installed in a location that is typical of the ambient room temperature. Do not install the 
thermostat in a draft, near a floor, behind doors

  or on a non

insulated external wall.   

Also avoid placing the thermostat in areas where the air movement is limited, affected by   
direct sunlight or other areas not 

typical” of the temperature of the room. 

Further, when mounting the A4100 be aware that drafts may travel down the inside of 
cavity walls, (especially if mounted on external walls) and enter the back of the 
thermostat or sensor enclosure through the cable entry holes in the wall. It is important 
to fully seal these holes to prevent any drafts affecting the internally mounted 
temperature sensor. It is recommended to mount the A4100 or remote sensors between 
1.5 & 1.7 metres from the floor where possible.   
Move the control wires through the large opening in the thermostat base plate then place 
the thermostat base on the wall and using appropriate screws, firmly attach the 
thermostat base to the wall. Seal any holes where cables enter the back of the 
thermostat to prevent drafts entering through these holes affecting he sensor. 

Setting the hardware switches 

Switch Off 

On 

Sw1 – Fan Speeds 

1 Speed Fan (2 heat / 2 
Cool) 

3 Speed Fan (1 heat / 1 
Cool) 

Sw2 – Equipment Type 

Heat Cool 

Heat Pump (O/B 
terminals) 

Sw3 – Stages 

1 Stage 

2 Stages 

Energise in cool (O) 

Energise in heat (B) 

Sw4 – Reversing Valve 
If Sw 2= ON – Heat Pump 
Sw4 – Fan Mode 
If Sw 2= OFF – Heat/cool 

Fan Control by Heater 
(HG) 

Fan Control by T’stat 
(HE) 

Sw5 – Anti cycle timer 

Off 

4 Minutes 

Sw6 – Operation 

Manual Thermostat 

Programmable 
Thermostat 

Sw7 – Minimum Run 

2 minutes 

6 Minutes 

Commercial Program 

Residential Program 

Sw8 – Program Type 
If Sw 6= ON – Programmable 
Sw8 – Set points 
If Sw 6= OFF – Manual 

Single Set point 

Two Set points 

Typical drawings have been provided on of this manual that will assist with the selection 
of the correct positions for these function switches.   
Switch 1 

  Relay Assignment The A4100 is fitted with 5 relays capable of switching up 

to 24VAC @ 1Amp. Switch 1 sets the function as either 3 fan speeds with 1 heat and 1 
cool operation or single fan speed with 2 heat and 2 cool, in either HP (Heat pump or 
reverse cycle) or HC (heat with add on cool) mode.   
Switch 2 

  Equipment Type. Both heat with add on cool or heat pump types of systems 

can be controlled by the A4100. Heat Cool System uses the 

W” terminals only for 

heating and the 

Y” terminals only for cooling. Heat Pump systems use the 

Y” 

terminal(s) for BOTH heating and cooling. The 

W1” terminal to control the reversing 

valve which determines heating or cooling mode.   
Switch 3 

  Equipment Stages. When it is necessary to control a single stage system 

A/C system fitted with auxiliary heating elements, turn sw3 OFF thereby selecting single 
stage mode. Heating elements are now called as stage 2 heat (NOT Stage 3 eat).   
Switch 4 

  Reversing valve or Fan mode When the A4100 is set for Heat Pump mode 

(Sw2 is on) then this switch sets the reversing valve logic (O/B). When the A4100 is set 
for Heat Cool Mode (Sw2 is off) then this switch sets the mode for the Heater fan logic 
(HG or HE mode).   
Switch 5 

  Anti Cycle Timer To protect some A/C systems it is preferred that under no 

circumstances should the compressor start within 4 minutes of it switching off. Note, 
when power is first applied to the A4100 it 

assumes” that the compressor has just 

stopped and applies this anti cycle delay time before starting. 
Switch 6 

 Thermostat Operation To suit the varying requirements of the user, the 

A4100 can be set as a programmable thermostat using the time clock to automatically 
control the building temperature to a programmed temperature profile, or to the very 
simple to operate manual mode where the user turns the thermostat on or off, and 
adjusts the temperature set point manually.   
Switch 7 

  Minimum Run time. To conserve energy and protect the A/C system it is 

recommended to limit the number of times the heating and or cooling system can run in 
1 hour. This switch sets the minimum heating and cooling equipment to a minimum run 
time of 2 or 6 minutes. Once the heating or cooling has started it must run for this 
minimum set time. The LCD will flash the word 

Heating” or 

Cooling” when ever this 

timer is in effect. 

Switch 8 

  Thermostat Control Logic. This switch also has two functions based on the 

position of switch 6. When the A4100 is set as a programmable thermostat switch 8 
determines whether commercial program or residential program is selected. When 
switch 6 has the A4100 used as on programmable thermostat, this switch sets single set 
point mode (imitating a simple mechanical thermostat) or whether a separate heating 
and cooling set point can be selected by the user. Two set point mode also permits the 
user to select a separate day and night set point if required.   

TT terminal Functions 

The A4100 is fitted with a set of terminals marked 

TT”. Detail on the functions that the 

TT” terminals perform is provided below. See the advanced installer setting menu of 

this manual for setting the function of this set of terminals. The wiring used in he 
following examples are not polarity dependent and do not normally require screened 
cable.  
NOTE: The A4100 can use multiple sensors if required. Drawings showing these various 
on figurations re shown on of this manual.   

Outside Air Sensor wiring 

Set 

TT= OA” in the advanced installer menu. 

The A4100 can display the outside air Temperature if   
desired. Some advanced control functions such as high 
  and low balance points rely Figure 1 on this sensor to 
  be fitted for correct operation. Using a single pair of   
wires connect the “TT” terminals in the A4100 to the two terminals in the outside air 
temperature sensor. (See figure 1). If the outside air sensor fails two dashes will be 
shown on the LCD where the outside air temperature would normally be displayed to 
alert you of the problem.   

Remote Air Temperature sensor wiring.   

Set 

TT= RS” in the advanced installer menu. When   

you wish to measure the temperature from a location   
distant from the wall controller, simply connect a remote 
  temperature sensor to the 

TT” terminals in the   

A4100. This will automatically disable the sensor fitted   
to the wall controller and use the remote temperature   
sensor(s) to control the room temperature (See figure 1 above). Should you wish, you 
can easily switch the remote temperature sensor on and off thereby switching 
temperature sensing locations between the remote temperature sensor and the A4100 
temperature sensor when required.   

Averaging Temperature sensors   

Set 

TT= AV” in the advanced installer menu.   

The A4100 can average the sensor temperature equally between the remote 
temperature sensor(s) and the one fitted to the A4100 if required. See figure 1 on the 
previous for details on wiring the sensor. The A4100 will auto

detect this sensor and 

automatically average the two sensors values to control the room temperature. 

Remote ON / OFF function   

S

et “TT= OF” in the advanced installer menu. 

The A4100 can be connected to an external dry contact, 
when this contact is closed the A4100 will turn OFF. See 
figure 3. When the A4100 has been switched OFF via 
the “TT” terminals the word “OFF” will flash in the LCD 
to indicate that this has been the shutdown method. The A4100 will return to the user 
settings when this switch is open. 

Using the 

Occupancy Mode” 

Set 

TT= OC” in the advanced installer menu.   

The A4100 can alternate between the user preferred set points and an installer pre 
programmed set point when required. Simply wire a remote switch to the A4100 

TT” 

terminals, (see figure 3). When the switch is open the user settings will control the room 
temperature, when the switch is closed the Installer 

Oc” (Occupied Cooling value) & 

Oh” (Occupied Heating value) settings will be used to control the room temperature.   

Typical Drawings 

The A4100 has the capacity to control a wide selection of heating, cooling and air 
conditioning systems. Using the DIP switches and installer software options, the A4100 
is capable of providing more than 96 different control methods from its 5 fitted relays. 
Examples of only the most common types of control wiring have been provided below. 
You may need to modify these drawings to specifically suit your individual needs.   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Attaching the thermostat   

Check that the position of the 8 DIP switches matches the requirements of the 
equipment being controlled and the specific requirements of the user. Detailed 
information on the 8 DIP switches can be found on this manual. Check the wiring 
matches that of the equipment the A4100 is to control and that all wiring is tight and not 
likely to short between adjacent wires. Equipment wiring information can be found of this   
manual. If using the Modbus communication capability of the A4100, ensure the 

A”, 

B” & 

C” data wires are in the correct position as an error here may affect    the 

communication of the entire network. Using masking tape or similar, block the hole in the 
wall where the wiring enters the back of the thermostat to prevent drafts that may travel 
down the inside of the wall cavity from affecting the accuracy of the internally fitted 
temperature  
Remove and discard the plastic tab on the internally fitted backup battery so that the 
battery is now in circuit and operating.   
Avoid twisting the case as this may stress the LCD and cause it to crack. Avoid running 
wiring near the internally fitted sensor.   
Take care not to damage or crush the temperature sensor between the two half’s of the 
case when you close the Chameleon case. Check this sensor location.   

A4100 

Advanced Installer Settings 

The A4100 is fitted with many advanced functions that can be fine tuned by the installer 
to specifically match the needs of the project of the user.   
Normally these functions will not need to be altered from the factory default position 
however, there may be times when you wish to alter a setting or control capability so that 
the A4100s performance will perfectly match a particular application.   
While in the advanced installer menu, all A4100 equipment control functions will be 
suspended. Normal equipment operation will continue when you have exited this menu 
(after any anti cycle delays or safety delays have terminated).   

A4100 

Using the Installer Menu 
 
 
 
 
 
 
 
 
 

FAN ON

Room

HOLD

CLOCK

SCREEN

SYSTEM

.

FAN

  

FRI

MED

AM

OFF

HOLD

CLOCK

SCREEN

SYSTEM

.

FAN

  

FRI

MED

AM

OFF

FAN ON

Room

DONE

To adjust a value in the Installer menu tap the UP or DOWN keys.   
To exit the installer menu tap the 

DONE” key or wait 60 seconds.   

Entering the Installer Menu To enter the Installer menu, press and hold the PROG DAY 
key for 30 seconds. After 6 seconds the LCD will show 

88:15” 

 The factory default  

Adjust this value to 

88:21” (or your previously selected value) by using the up or down   

key. Tap the DONE key to enter the menu. 
If you have entered the correct PIN you will be given the first menu option, if you have 
entered a incorrect PIN you will be exited from this menu. Default Installer Values are 
shown in the examples below.   

A4100 

PN =21 Keyboard Lock PIN   

This is the required PIN for future entry into the   
Installer menu. Range 00 to 99 in 01 steps.   
(Caution, if you change this value and forget your   
new PIN, you may need to return the A4100 to   
place of purchase for unlocking 

there may be a fee for this service) 

DONE

LC=0 Keyboard Lock level   

Programmable Mode (SW6=ON)   

LC=00 

Key board Lock OFF. LC=01 

All keys are locked.   

HL=35 (95F) Heating Limit (or High Limit)   

The highest Heating value permitted to be set by the user. Adjustable between 0~35c 
(32~95F).  

CL =5 (41F) Cooling Limit (or Low Limit) 

The lowest Cooling value permitted to be set by the user. Adjustable between 5~37c. 
(41~98F). 

CF=C Temperature display   

Format Deg C or deg F display type. (effects all user and installer menu items) 

C1 =0.0 Fitted Sensor Calibration   

Calibration Offset for the internal sensor. Adjustable range +/

5 deg C (+/

9 F).   

tC =12 Time Clock   

Display 12 or 24 hour Clock Style.   

tD =0 Temperature Display

   

TD=00 

The A4100 will display both the Room & Set Temperature. TD=01 

The 

A4100 will display set temperature only. 

AH=2 After Hours Override Timer   

DAY / EVENING Mode 

Commercial Thermostat Mode (Sw6=on, Sw8=off) After hour 

run time period 

Adjustable range 0 (off) to 12 hours. Setback (1, 2, 3 ,4) mode 

 

Residential programmable Mode (Sw6=on, Sw8=on) Temporarily program override 
period. Off= Override till next program change or 1

12 hours (fixed time override).

 

SC=OFF Stop Cooling temperature   

Start/stop mode Only. (Sw6=on, Sw8=off). Cooling temperature that will be maintained 
when running the 

STOP” program. (Night Setback) Adjustable between 5~37c. 

(41~98F) + OFF.   

SH= OFF Stop Heating temperature   

Start/stop mode Only. (Sw6=on, Sw8=off). Heating temperature that will be maintained 
when running the 

STOP” program. (Night Setback) Adjustable between 5~37c. 

(41~98F) + OFF. Db=1 Single Set Point Dead band. Dead band between heat and cool 
set point when in single set point mode (sw8 off). Adjustable between 0 and 5 deg.   

FO=0/2 Fan Options 

Advanced Fan Functions   

This function is only enabled when the selected fan mode is Fan On. 

FAN ON” will be 

displayed in the LCD to confirm the mode. FO=0 (Default).The fan will run continuously 

, 24 hours a day 7 days a week. 

FO=1 The fan will continue to run after the cooling stops to ensure the maximum fresh 
air ventilation and to aid in cooling. The fan will stop after the heating stops. (This is done 
to prevent cold drafts that may occur on cold days when A/C system is heating).   
FO=2(Default in Start Stop Mode).Available only if in Programmable Mode (Sw6=on). 
The Fan will Run continuously from program # 1 (or Start) Program to program #4 (or 
Stop) program and then run in AUTO mode overnight to maintain the night time set 
points.  
FO=3 

Available only if in Programmable Mode (Sw6=on). This mode is the 

combination of option 1 and option 2 given above.   

FP=1 Fan Purge Time Period (Fan run on)   

If fan mode is Auto Fan, the indoor fan will run for FP=XX minutes after heating or 
cooling has stopped to extract any stored energy in the coils etc 

 (Necessary for 

electric element heating). Adjustable between off to 5 minutes in 1 minute intervals.   

Fn=A Function 

Available Equipment Modes 

FN=A 

Select if controlling a Heating & Cooling system.   

FN=C 

Select if controlling a Cooling only system. (disables heating menus)   

FN=H 

Select if controlling a Heating only system. (disables cooling menus)   

H3=Of W2 relay Function   
Only operates in single fan speed HP mode. (Sw 1=off & Sw2=on).   
H3=Of 

W2 relay is used as 2nd (or 3rd) stage Auxiliary heat.   

H3=EH 

W2 relay is used to control an Emergency Heating system.   

H3=AH 

W2 relay is used to control a Add On Heat system.   

tt=RS TT terminal Function   

TT=OA 

Connect the outside air temperature sensor to the TT terminals to display the 

outside Air Temperature. (Required for all outside air control functions to operate.)   
TT=RS 

Connect the remote room temperature sensor to the TT terminals to measure 

the temperature at a remote location away from the A4100. (Note: This completely 
disables the temperature sensor fitted to the A4100)   
TT=AV The TT terminals    will average the temperature measured by the A4100 internal 
sensor and remote room temperature sensor.   
TT=OF 

  A closed contact on the TT terminals will switch the A4100 On or OFF.   

TT=OC A closed contact on the TT terminals will switch the A4100 to Occupied Mode, 
where the oC & oH temperatures will replace the user set temperatures. 

AF=0 Anti

Freeze Function   

AF=0 

Antifreeze function off.   

AF=1 

Room temperature will not be permitted to fall below 5c (41F).   

oH=OFF Occupied Mode Heat Set   

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