Dettson COND-30 Assembly instructions

2019-12-04 X40229 Rev. J
INSTALLATION
INSTRUCTIONS AND
HOMEOWNER’S MANUAL
INSTALLER / SERVICE TECHNICIAN:
Use the information in this manual for the installation / servicing and keep the document near the furnace for future reference.
Communication wire connected between the indoor and outdoor units must be rated for at least 120VAC, they are protected by the
outdoor unit breaker and must be sized appropriately.
Do not install any metering device on the indoor coil. The expansion valve is located in the outdoor unit. If a metering device is
already installed in the indoor coil, it must be removed.
Both refrigerant lines must be separately insulated in order to avoid condensation and to ensure proper efficiency.
COND
-
30
COND
-
36
Liquid line dia (In)
1/4
1/4
Gas li
ne dia (In)
5/8
5/8
HOMEOWNER :
Please keep this manual near the furnace for future reference.
CAUTION
DO NOT TAMPER WITH THE UNIT OR ITS CONTROLS. CALL A QUALIFIED SERVICE TECHNICIAN.
THE WELDS MUST BE DONE BY USING NITROGEN PROTECTIVE GAS. NON-COMPLIANCE WILL MEAN THE IMMEDIATE
CANCELLATION OF THE WARRANTY.
Manufactured by :
Dettson Industries Inc.
Sherbrooke (Quebec) Canada
http://www.dettson.ca/
COND-30
COND-36
ALIZÉ MODELS

2
QUICK SETUP
Simple start-up using communicating thermostat with modulating furnace
1. Turn off the breaker of the outdoor unit and the furnace
2. Connect COND1 and COND2 on the interface card to N(1) and 2 at the outdoor unit (See Figure 9: 30/36K Electrical diagram)
3. Connect the RJ-11 wire between the interface and the furnace control board (See Figure 9: 30/36K Electrical diagram)
4. Position the temperature sensor (included) on the crossover of the indoor coil and connect it to the terminal T1 and Tc of the
interface (See section 6.8.1-)
5. Turn the outdoor unit “ON”
6. Turn the furnace “ON”
Make sure the unit is working properly
1. The Green LED on the interface card should be blinking once every two seconds
2. The Orange LED on the interface card should be blinking once every two seconds
3. The communicating thermostat will display “Heat Pump Found”
4. Set the thermostat to “COOL” mode and adjust the set point to a lower value than the actual room temperature
5. The furnace and the outdoor unit should start within 5 minutes
In this configuration, the interface card will gather information from both the outdoor unit and the furnace in order to adjust the fan speed to
the capacity of the outdoor unit
Legacy connection
1. Connect all the thermostat control wires to the interface card and the air handler control board (See Figure 20)
2. Make sure to connect the heat outputs W1 out and W2 out of the thermostat to the W1 and W2 inputs of the furnace – OR – W on
W2 on a single stage thermostat
3. Connect COND1 and COND2 on the interface card to N(1) and 2 at the outdoor unit (See Figure 20)
4. Set the dipswitches to the desired balance point (See Table 2)

3
TABLE OF CONTENTS
1- SAFETY PRECAUTIONS ............................................. 5
1.1- Warning ....................................................................... 5
1.2- Caution ........................................................................ 5
1.3- Specifications table...................................................... 6
1.4- Operation CharaCteristicS Curves .............................. 7
1.5- Capacity variation ratio according to temperature ....... 8
1.6- Noise criteria curve tables ........................................... 9
2- CONSTRUCTION VIEWS ........................................... 10
3- REFRIGERANT SYSTEM DIAGRAM......................... 10
4- SCHEMATIC DIAGRAMS ........................................... 11
4.1- Electrical diagram ...................................................... 11
4.2- Printed circuit board................................................... 12
5- FUNCTIONS AND CONTROL OUTDOOR UNIT ....... 13
5.1- Thermostat ................................................................ 13
5.1.1- Communicating thermostat (R02P032) ............. 13
5.1.2- Legacy thermostat............................................. 13
5.2- Function & control...................................................... 13
5.2.1- Temperature Parameters .................................. 13
5.2.2- Basic Functions................................................. 13
6- INSTALLATION MANUAL .......................................... 15
6.1- Notices for installation ............................................... 15
6.2- Installation site instructions........................................ 15
6.3- Installation site of the outdoor unit ............................. 15
6.4- Safety precautions for electric appliances ................. 15
6.5- Grounding.................................................................. 15
6.6- Installation drawing.................................................... 16
6.7- Installation of the indoor cooling coil.......................... 16
6.7.1- Multiposition coil................................................ 16
6.7.2- Multiposition (field conversion).......................... 18
6.7.3- Condensate drain.............................................. 18
6.8- Installation of interface card....................................... 19
6.8.1- Evaporator temperature sensor installation....... 19
6.9- Installation of connection pipe ................................... 20
6.10- installation of the outdoor unit.................................... 20
6.10.1- Electrical wiring ................................................. 20
6.10.2- Air purging and leakage test.............................. 20
6.10.3- Outdoor unit condensate drainage .................... 20
6.10.4- Check after installation and test operation ........ 21
6.10.5- Operation test.................................................... 21
7- TROUBLESHOOTING.................................................22
7.1- Precautions before performing inspection or repair ... 26
7.2- Verification................................................................. 26
7.3- Malfunction & status codes of the interface card
flashing leds......................................................................... 27
7.4- Malfunction & status codes of the outdoor unit flashing
leds 28
7.5- Analysis of some of the malfunction display: ............. 30
7.6- troubleshooting flow chart.......................................... 31
7.6.1- IPM protection desynchronizing malfunction;
compressor overcurrent ................................................ 32
7.6.2- Anti-high temperature, overload protection ....... 33
7.6.3- Failure start up malfunction ............................... 34
7.6.4- Out of step diagnosis for the compressor.......... 35
7.6.5- Overload and discharge malfunction ................. 36
7.6.6- PFC (correction for power factor) malfunction... 37
7.6.7- Communication malfunction .............................. 38
7.6.8- Flow chart outdoor communication circuit
detecting........................................................................ 39
7.6.9- High pressure protection ................................... 40
8- REMOVAL PROCEDURE OF OUTDOOR UNIT ........41
9- COMPONENTS AND REPLACEMENT PARTS.........48
9.1- Exploded vue 30/36K................................................. 48
9.2- Parts list 30/36K......................................................... 49
APPENDIX 1: RESISTANCE TABLE OF AMBIENT
TEMPERATURE SENSOR 15 K ......................................50
APPENDIX 2: RESISTANCE TABLE OF TUBE
TEMPERATURE SENSOR 20 K ......................................51
APPENDIX 3: RESISTANCE TABLE OF OUTDOOR
DISCHARGE TEMPERATURE SENSOR 50 K ............... 52
APPENDIX 4: WARRANTY POLICY ...........................53

4
LIST OF FIGURES
Figure 1: Operation characteristic curves 30K ............................. 7
Figure 2: Operation characteristic curves 36K ............................. 7
Figure 3: 30K Capacity ratio vs outdoor temperature ...................8
Figure 4: 36K Capacity ratio vs outdoor temperature ...................8
Figure 5: 30K Noise curve............................................................ 9
Figure 6: 36K noise curve ............................................................9
Figure 7: 30/36K dimensions...................................................... 10
Figure 8: refrigerant system diagram.......................................... 10
Figure 9: 30/36K Electrical diagram ........................................... 11
Figure 10: 30/36K Circuit board ................................................. 12
Figure 11: Installation schematic and clearances....................... 16
Figure 12: Multiposition configurations ....................................... 17
Figure 13: Splashguard without front slope ................................ 17
Figure 14: Splashguard with front slope..................................... 18
Figure 15: Multiposition field conversion .................................... 18
Figure 16: Condensate drain...................................................... 18
Figure 17: Chinook gas furnace ................................................. 19
Figure 18: Supreme electric furnace .......................................... 19
Figure 19: Evaporator Temperature Sensor– ............................. 19
Figure 20: Legacy furnace or air handler.................................... 20
Figure 21: Tubing tightening....................................................... 20
Figure 22: Interface card ............................................................ 27
LIST OF TABLES
Table 1: Outdoor unit specifications............................................. 6
Table 2: Dipswitch adjustment ................................................... 13
Table 3: Tubing torque tightening............................................... 20
Table 4: Malfunction and status display of interface card........... 27
Table 5: Malfunction and status display of outdoor unit 30/36K . 28

5
1-SAFETY PRECAUTIONS
Installing, starting up, and servicing air conditioner can be hazardous due
to system pressure, electrical components, and equipment location, etc.
Only trained, qualified installers and service personnel are allowed to
install, start-up, and service this equipment.
When handling the equipment, observe precautions in the manual and on
tags and stickers on the equipment. Follow all safety codes. Wear safety
glasses and work with gloves. Keep quenching cloth and fire extinguisher
nearby when brazing.
Read the instructions thoroughly and follow all warnings or cautions in
literature and attached to the unit. Always follow building codes and current
edition of national as well as local electrical codes.
Recognize the following safety information:
Warning: Incorrect handling could result in personal
injury or death
Caution: Incorrect handling may result in minor injury, or damage to
product or property
WARNING
1.1- WARNING
All electric work must be performed by a licensed technician according to
local regulations and the instructions given in this manual
Before installing, modifying, or servicing the system, the main
electrical disconnect switch must be in the OFF position. There
may be more than 1 disconnect switch. Lock out and tag switches
with a suitable warning label.
Never supply power to the unit unless all wiring and tubing are
completed, connected and checked.
This system contains dangerous electrical voltage. Incorrect
connection or inadequate grounding can cause personal injury or
death. Stick to the wiring diagram and all the instructions when
wiring.
Have the unit adequately grounded in accordance with the local
electric codes;
Have all wiring connected tightly. Loose connections may lead to
overheating and a possible fire hazard.
All installation or repair work shall be performed by your dealer or a
specialized subcontractor as there is the risk of fire, electric shock,
explosion or injury.
Make sure the outdoor unit is installed on a stable, level surface
with no accumulation of snow, leaves, or trash beside;
Avoid contact between refrigerant and fire as it generates
poisonous gas;
Apply specified refrigerant only. Never have it mixed with any other
refrigerant. Never have air remain in the refrigerant lines as it may
lead to rupture and other hazards;
Make sure no refrigerant gas is leaking out when installation is
completed;
Should there be refrigerant leakage, the density of refrigerant in the
air shall in no way exceed its limited value, or it may lead to
explosion;
Keep your fingers and clothing away from any moving parts;
Clear the site after installation. Make sure no foreign objects are
left in the unit;
Always ensure effective grounding of the unit.
CAUTION
1.2- CAUTION
Never install the unit in a place where a combustible gas might
leak, it may lead to fire or explosion;
Provide an electric leak breaker when it is installed in a wet
environment;
Never wash the unit with water
Handle unit transportation with care. The unit should not be carried
by only one person if it is more than 20 kg;
Never touch the heat exchanger fins with bare hands;
Never touch the compressor or refrigerant piping without wearing
gloves;
Make sure that the air handler filter is clean;
Should any emergency occur, stop the unit and disconnect the
power immediately;
Properly insulate ALL refrigerant tubing from outdoor units to the
interior cooling coil to prevent condensation.

6
1.3- SPECIFICATIONS TABLE
Table 1: Outdoor unit specifications
COND-30 COND-36
Rated voltage V~
Rated frequency Hz
Pha e
Btu/h 28000(9485~30026) 33600(7404~35997)
Btu/h 28400(9997~32994) 34600(14979~35997)
W2700(600~3900) 4100(450~4300)
W2800(650~4000) 3800(560~4300)
A11.5 17
A12 16.5
W4000 4300
A17 20
Pint/h 1.42 1.66
(Btu/h)/W 10.37 8.2
2.97 2.67
18 18
9 9
A40 67
A13.45 17.5
W2450 3010
Overload protector INT11L-6233 CS01F272H01
° F (°C) 0~115 (-18~45) 0~109 (-18~46)
° F (°C) -4~75 (-20~24) -4~75 (-20~24)
inch ɸ5/16 ɸ3/8
inch 2 1/18 2 1/18
inch 37.5X1.5x29.4 37x1,75x30
rpm 795 890
W90 170
A0.5 0.7
CFM 2354 2589
inch ɸ21.73 ɸ21.73
MPa 4.3 4.3
MPa 2.5 2.5
dB (A) 62 65
dB (A) 72 75
inch 38.6x31.1x16.8 38.6x31.1x16.8
inch 42.5x19.1x33.1 42.5x19.1x33.1
inch 42.6x19.2x33.7 42.6x19.2x33.7
lb 154.4 161
lb 165.4 172
oz 84.7 91.7
ft (m)
oz/ft.
inch
inch
ft (m)
ft (m)
24.6 (7.5)
0.5
ɸ1/4
ɸ5/8
32.8 (10)
98.4 (30)
Max di tance height
Max di tance length
Net weight
Gro weight
Refrigerant
Connection pipe ga additional charge
Refrigerant charge
Connection pipe length
El ctronic xpansion valv
Aluminum fins-copp r tub
Axial-flow
Automatic d frosting
R410A
Rotary
COP *
SEER *
1
Model
EER *
Dehumidifying volume
208/230
60
Conden er coil dimen ion (LXDXW)
Fan motor peed
Fan motor power output
Fan motor RLA
Compre or RLA
Outer diameter liquid pipe
Outer diameter ga pipe
Compre or power input
Throttling method
Dimen ion of package(LXWXH)
Cooling operation ambient temperature range
Heating operation ambient temperature range
Defro ting method
Climate type
I olation
Conden er pipe diameter
Permi ible exce ive operating
pre ure for the di charge ide
Permi ible exce ive operating
Pre ure for the uction ide
Sound pre ure level
Sound power level
Dimen ion (WXHXD)
Dimen ion of carton box(LXWXH)
Fan type
T1
I
Moi ture protection
Conden er form
Power upply
Cooling capacity (min~max)
Heating capacity (min~max)
Cooling power input (min~max)
Heating power input (min~max)
Cooling current input
Heating current input
Rated input
Rated current
Air flow volume
HSPF *
Compre or type
Compre or LRA
IPX4
Fan diameter
Conden er row -fin gap

7
1.4- OPERATION CHARACTERISTICS CURVES
Figure 1: Operation characteristic curves 30K
Figure 2: Operation characteristic curves 36K

8
1.5- CAPACITY VARIATION RATIO ACCORDING TO TEMPERATURE
Figure 3: 30K Capacity ratio vs outdoor temperature
Figure 4: 36K Capacity ratio vs outdoor temperature

9
1.6- NOISE CRITERIA CURVE TABLES
Figure 5: 30K Noise curve
Figure 6: 36K noise curve
Compressor frequency/Hz
Compressor frequency/Hz

10
2-CONSTRUCTION VIEWS
Figure 7: 30/36K dimensions
3-REFRIGERANT SYSTEM DIAGRAM
Figure 8: refrigerant system diagram
* Properly insulate ALL refrigerant tubing from outdoor units to the interior cooling coil to prevent water dripping.
427mm
16.8 inch

11
4-SCHEMATIC DIAGRAMS
4.1- ELECTRICAL DIAGRAM
Figure 9: 30/36K Electrical diagram

12
4.2- PRINTED CIRCUIT BOARD
Figure 10: 30/36K Circuit board

13
5-FUNCTIONS AND CONTROL
OUTDOOR UNIT
5.1- THERMOSTAT
5.1.1- Communicating thermostat (R02P032)
The unit must be used with the Dettson communicating thermostat
(R02P029 or R02P032) in order to work as a fully modulating unit. In this
case, the interface card (K03081) will be able to gather information from
the outdoor unit, the furnace and the thermostat, making this integrated
system very easy to install and increased home owner comfort. The indoor
blower speed will be determined by various factors including outdoor
temperature, compressor speed and demand from the thermostat. The
balance point (temperature at which the unit will switch from heat pump
heating to auxiliary heat) will be adjustable through the thermostat. If this
unit is destined to be used as a cooling system only, the heat pump feature
can also be disabled altogether from the communicating thermostat.
For more details refer to the manual provided with the thermostat.
Auxiliary Heating
Heat pump Disable
This feature is applicable only in the heat pump mode. When this feature is
selected, the thermostat will switch to electric heat and shut off the
compressor when the outside temperature falls below the HP balance
point. In the Thermostat User Menu, select the temperature which can be
between 5 to 50°F.
Dual Fuel Disable
This feature is applicable only in the heat pump mode. When this feature
is selected, the thermostat will switch to fossil fuel heat and shut off the
compressor when the outside temperature falls below the DF balance
point. In the Thermostat Installer Menu, select the temperature which can
be between 5 to 50°F.
5.1.2- Legacy thermostat
Shall the unit be controlled by a one or two stage thermostat, the unit will
only be able to run as a one or two stage unit. Hence, the indoor blower
speed will only be controlled by the air handler, leading to a fixed air flow
operation. In this configuration, the balance point can be set using the
dipswitches S1-2 to S1-4 (see Table 2). The Auxiliary heat or heat pump
function can also be disabled using these same switches.
5.1.2.1 Balance point adjustment
When the dipswitch bank is set accordingly, the interface card will modify
the heat source in function of the outdoor temperature. The outdoor unit
will send the temperature reading through the serial communication wires
(COND1 and COND2), with no need to install a separate temperature
sensor. The unit will heat using the heat pump until the outdoor temperature
goes below the balance point that was set according to the dipswitch table
below.
Table 2: Dipswitch adjustment
DIP1
-
2
DIP1
-
3
DIP1
-
4
Balance point
OFF
OFF
OFF
-
20
°
C
(
-
4°F
)
OFF
OFF
ON
-
17
°C
OFF
ON
OFF
-
14
°C
OFF
ON
ON
-
11
°C
ON
OFF
OFF
-
8
°C
ON
OFF
ON
-
5°C
ON
ON
OFF
-
2
°C
ON
ON
ON
Heatpump heat only
5.2- FUNCTION & CONTROL
5.2.1- Temperature Parameters
•Indoor thermostat temperature (

)
•Indoor ambient temperature (

.)
Note: 

is determined by indoor and outdoor units. If the indoor
unit controls temperature compensation, 

is determined by the
value sent to the outdoor unit by the indoor unit; if it is not controlled by the
indoor unit, 

will be 3°C (5.4°F) as default.
5.2.2- Basic Functions
Once energized, in no case should the compressor be restarted within less
than 3 minutes. In the situation that memory function is available for the
first energization, if the compressor is at stop before de-energization, the
compressor will be started with a 3-minute lag; and once started, the
compressor will not be stopped within 6 minutes regardless of changes in
room temperature.
1. Cooling mode
Working conditions and process of cooling
(1) When   , the unit will enter cooling operation, in
which case the indoor fan, the outdoor fan and the compressor
will work and the indoor fan will run at pre-set speed.
(2) When    !"#$%&'"()* the compressor will stop,
the outdoor fan will stop with a time lag of 60s, and the indoor
fan will run at pre-set speed.
(3) When  !"#$%&'"() + & +  , -"#$-&."()*
the unit will remain at its previous state.
Under this mode, the four-way valve will be de-energized and temperature
can be set within a range from 16.1°C (61°F) to 30°C (86°F).If the
compressor is shut down for some reason, the indoor fan and the swing
device will operate at original state.
Protections
•Antifreeze protection
Under cooling, 6 minutes after the compressor is started:
(1) If 
/
 !"#$%0&'"(), the compressor will operate at reduced
frequency;
(2) If 
/
 -"#$%1&!"(), is detected for durative 3 minutes, the
compressor will stop, and after 30 seconds, the outdoor fan will
stop; and under cooling mode, the indoor fan and the swing
motor will remain at the original state;
(3) If 
/
 '"#$2!&."(), and the compressor has remained at
OFF for at least 3 minutes, the compressor will resume its
original operation state.
•Total current up and frequency down protection
(1) When total current 3
4
≤16A, increasing frequency is allowed;
(2) When total current 3
4
≥17A, increasing frequency is prohibited;
(3) When total current 3
4
≥18A, the compressor will run at reduced
frequency;
(4) When total current 3
4
≥20A, the compressor will stop and the
outdoor fan will stop with a delay of 60s.
2. Heating Mode
Working conditions and process of heating
(1) If &   , !"#$%&'"(), the unit enters heating mode,
in which case the four-way valve, the compressor and the
outdoor fan will operate simultaneously, and the indoor fan will
run at pre-set speed in the condition of pre-set cold air
prevention.
(2) If &   , 0"#$5"(), the compressor will stop, the
outdoor fan will stop with a time lag of 60s, and the indoor fan
will stop after 60-second blow at low speed
(3) If  , !"#$%&'"() + & +  , 0"#$5"(), the
unit will maintain its original operating status.
Under this mode, the four-way valve is energized and temperature
can be set within a range of 16.1°C (61°F) to 60°C (86°F). The

14
operating symbol, the heating symbol and pre-set temperature are
revealed on the display.
Condition and process of defrost
When duration of successive heating operation is more than 45 minutes,
or accumulated heating time more than 90 minutes, and one of the
following conditions is reached, the unit will enter the defrost mode after 3
minutes.
(1) 67866&  0"#$2-"(), 678669  !"#$!.&2"();
(2) -!"#$!.&2"()  67866.;
(3) 0"#$!%"()  67866& + !"#$!.&2"(),
678669  ."#$-:&2"();
(4) -1"#$-2"()  67866& +  0"#$!%"(),
678669 ;6<96< 
$67866& -2&."#$0&2"()=
(5) 67866& + -1"#$-2"(), 678669
;6<96<  $67866& -2&."#$0&2"().
After energization, when defrosting for the first time ;6<96< >
-:&."#$1?)& If it is not the first time for defrosting, ;6<96< is
determined by 678669 of last time quitting defrosting.
(1) 678669 ＞ !"#$%0&'?), ;6<96< > -:&."#$1?)=
(2) 678669  !"#$%0&'?), ;6<96< >
-2&."#$0&2?)
At that time, the indoor fan stops and the compressor stops, and after 60
seconds the outer fan will stop, and then after 30seconds, the four-way
valve will stop. After 30 seconds, the compressor is initiated for raising the
frequency to defrost frequency. When the compressor has operated under
defrost mode for 10 minutes, or 677  -1"#$01?), the
compressor will be converted to 46Hz operation. After 30 seconds, the
compressor will stop. And after another 30 seconds, the four-way valve will
be opened, and after 60 seconds, the compressor and the outer fan will be
started, the indoor fan will run under pre-set cold air prevention conditions,
and H1 will be displayed at temperature display area on the display panel.
Defrost frequency is 70Hz.
•Total current up and frequency down protection
(1) When total current 3
4
≤16A, increasing frequency is allowed;
(2) When total current 3
4
≥17A, increasing frequency is prohibited;
(3) When total current 3
4
≥18A, the compressor will run at reduced
frequency;
(4) When total current 3
4
≥20A, the compressor will stop and the
outdoor fan will stop with a delay of 60s.
3. Common Protection Functions and Fault display under
COOL and HEAT Modes
Overload protection
7: measured temperature of outdoor heat exchanger under cooling
mode; and measured temperature of indoor heat exchanger under heating
mode.
(1) Cooling overload
a. If 7  0!&!"#$-!'"()* the unit will return to its
original state.
b. If 7  00"#$-%-"(), frequency rise is not
allowed.
c. If 7  0:&."#$-%'"(), the compressor will run at
reduced frequency.
d. If 7  '!&!"#$-22"(), the compressor will stop
and the indoor fan will run at pre-set speed.
(2) Heating overload
a. If 7  0!&!"#$-!'"()* the unit will return to n its
original operation sate.
b. If 7  00"#$-%-"(), frequency rise is not
allowed.
c. If 7  0:&."#$-%'"(), the compressor will run at
reduced frequency.
d. If 7  '!&!"#$-22"(), the compressor will stop
and the indoor fan will blow residual heat and then
stop.
Exhaust temperature protection of compressor
(3) If exhaust temperature ≥97.8°C (208°F), frequency is not allowed
to rise.
(4) If exhaust temperature ≥102.8°C (217°F), the compressor will
run at reduced frequency.
(5) If exhaust temperature ≥110°C (230°F), the compressor will stop.
(6) If exhaust temperature ≤90°C (194°F) and the compressor has
stayed at stop for at least 3 minutes, the compressor will resume
its operation.
Communication fault
If the unit fails to receive correct signals for durative 3 minutes,
communication fault can be justified and the whole system will stop.
Module protection
Under module protection mode, the compressor will stop. When the
compressor remains at stop for at least 3 minutes, the compressor will
resume its operation. If module protection occurs six times in succession,
the compressor will not be started again.
Overload protection
If temperature sensed by the overload sensor is over 115°C (239°F), the
compressor will stop and the outdoor fan will stop with a time lag of 30
seconds. If temperature is below 95°C (203°F), the overload protection will
be relieved.
DC bus voltage protection
If voltage on the DC bus is below 150V or over 420V, the compressor will
stop and the outdoor fan will stop with a time lag of 30 seconds. When
voltage on the DC bus returns to its normal value and the compressor has
stayed at stop for at least 3 minutes, the compressor will resume its
operation.
Designation of
sensors
Faults
Outdoor ambient
temperature
The sensor is detected to be open-circuited
or short-circuited for successive 30
seconds.
Outdoor tube
temperature
The sensor is detected to be open-circuited
or short-circuited for successive 30
seconds, and no detection is performed
within 10 minutes after defrost begins.
Exhaust
After the compressor has operated for 3
minutes, the sensor is detected to be open-
circuited or short circuited for successive
30 seconds.
Overload
After the compressor has operated for 3
minutes, the sensor is detected to be open-
circuited or short-circuited for successive
30 seconds.

15
6-INSTALLATION MANUAL
6.1- NOTICES FOR INSTALLATION
CAUTION
1. This unit should be installed only by authorized service
technicians according to local and/or government regulations and
in compliance with this manual;
2. Warning: before obtaining access to terminals, all supply circuits
must be disconnected;
3. The temperature of refrigerant line will be high; please keep the
interconnection cable away from the copper tube.
6.2- INSTALLATION SITE INSTRUCTIONS
Proper installation site is vital for correct and efficient operation of the unit.
Avoid the following sites where:
1. Strong heat sources, vapours, flammable gas or volatile liquids
are emitted;
2. High-frequency electro-magnetic waves are generated by radio
equipment, welders and medical equipment;
3. Salt-laden air prevails (such as close to coastal areas);
4. The air is contaminated with industrial vapours and oils;
5. The air contains sulphuric gases such as in hot spring zones;
6. Corrosion or poor air quality exists.
6.3- INSTALLATION SITE OF THE OUTDOOR UNIT
1. Select a site where there is sufficient ventilation;
2. Select a site where there is no obstructions blocking the inlet and
outlet;
3. The site should be able to withstand the full weight and vibration;
4. Select a dry place, and do not expose the unit to direct sunlight
nor strong winds;
5. Make sure that the outdoor unit is installed in accordance with the
installation instructions, and is convenient for maintenance and
repair;
6. The maximum height difference between the indoor cooling coil
and the outdoor unit is 32,8ft, and the maximum length of the
connecting tubing’s must not exceed 49,2ft(14.996 m) (09K),
65,6ft(19.995 m) (12K) and 82ft (24.994 m) (18/24K).
6.4- SAFETY PRECAUTIONS FOR ELECTRIC
APPLIANCES
1. A dedicated power supply circuit should be used in accordance
with local electrical safety regulations;
2. The unit should be reliably grounded and connected to an
exclusive ground device by the professionals;
3. The circuit breaker must have the functions of magnetic dripping
and heat dripping to prevent short circuit and overload;
4. The minimum distance between the unit and combustive surface
is 4,9 ft.(1.4935 m);
5. The appliance shall be installed in accordance with national wiring
regulations:
6. An all-pole disconnection switch with a contact separation of at
least 0.1 inch in all poles should be connected in fixed wiring.
6.5- GROUNDING
1. Please ensure that the unit is reliably grounded;
2. The yellow-green wire in the outdoor unit is the grounding wire
which cannot be used for the other purposes. Improper grounding
may cause electric shock;
3. The ground must have reliable terminal. Please do not connect
wire with the following:
oWater Pipe
oGas pipe
oSewer pipe
oOther place that professional personnel consider is
unreliable.
4. The model and rated values of fuses should accord with the silk
print on fuse cover or related PCB.

16
6.6- INSTALLATION DRAWING
Figure 11: Installation schematic and clearances
6.7- INSTALLATION OF THE INDOOR COOLING COIL
Check the coil for shipping damage and verify the contents of the box
containing the evaporator coil. If you should find damage, immediately
contact the last carrier. Coils are shipped with a 10 psi dry air holding
charge. Puncture rubber plug on suction line to release charge before
removing plugs. The absence of pressure does not verify a leak. Check
the coil for leaks before installing or returning it to your wholesaler.
Coil should be level, or pitched slightly toward the drain connection. Airflow
face velocity above 350 ft/min is not recommended for downflow or
counterflow applications due to potential water blow-off.
For an installation with a Chinook, position the coil on the supply outlet of
the furnace using sheet metal screws. Drain pans are made of a polymer
that can withstand temperatures up to 232.22°C (450°F). Maintain a
minimum of 3” clearance over the heat exchanger.
For an installation with a Supreme, position the coil on the return outlet of
the furnace.
6.7.1- Multiposition coil
Multi-Position A-Coils come factory installed with a vertical and horizontal
drain pans and can be configured for upflow, downflow, horizontal blow-
through or horizontal pull-through installations. In the center opening of
vertical drain pan, a metal Inlet Air Restrictor is factory installed and is
required for horizontal applications. It may be removed for vertical
applications. Airflow face velocity above 350 ft/min is not recommended for
downflow or counterflow applications due to potential water blow-off.
For horizontal configurations, install splashguard (included) onto the coil
outlet, and extend suction line insulation into the coil cabinet by 2” to
prevent moisture from dripping onto the insulation (the rubber grommet
may need to be moved). Splashguard installation is not required for vertical
configurations. Bottom flange of guard should rest on pan and sides
screwed to the duct flanges. See Figure 13 and Figure 14 for splashguard
instructions.
In downflow and counter flow configurations, aluminum foil tape must be
applied to seal the top edge of the insulation to the cabinet. This tape will
prevent the possibility of the insulation delaminating and blocking airflow.
In horizontal pull-through and counter flow configurations, a minimum 12”
transition is required in front of the coil as shown in Figure 12. This is
required to ensure proper airflow distribution and to reduce pressure drop.

17
Figure 12: Multiposition configurations Figure 13: Splashguard without front slope

18
Figure 14: Splashguard with front slope
6.7.2- Multiposition (field conversion)
Field Conversion Instructions from Left-to-Right or Right-to-Left
Airflow
FOR EACH STEP, REFER TO FIGURE 15:
1- Remove front panels.
2- Remove the top tie bar and pull the coil assembly from the
housing.
3- Remove the horizontal drain pan, and re-install it to the opposite
side of the coil (Note: horizontal drain pan must have drain plugs
tightly closed in the rear of the unit).
4- Remove the top plate.
5- Remove the water diverter, and re-install it to the opposite slab
(Note: If water diverter is attached by screws, remove screws,
and bend tab straight or cut tab off).
6- Replace the top plate, and apply sealant to seal any air gaps.
7- Before re-inserting the coil assembly, cut the front flange on the
housing and fold it back to allow access to the horizontal drain
connections (Note: Copy the factory cut-out on the opposite side
of the housing).
8- Slide the coil assembly back into the housing (Note: If unit is
equipped with a sheet metal spacer, it must be moved to the
opposite side of the housing).
9- Re-install the piping panel to the housing.
10- Cut a hole in the access panel to allow access to the horizontal
drain connections, and re-install the access panel to the housing
(Note: Access panel may need to be notched to allow access to
suction header).
11- Seal unused condensate drain connection cut-out holes in the
front panel to prevent air leakage.
Figure 15: Multiposition field conversion
6.7.3- Condensate drain
Coils are equipped with multiple drain connections. Determine the drain
connections to be used and note the difference between the primary
(green) and secondary (red) openings. Drain plugs are provided for all
openings; remove and discard the appropriate plugs with ½” drive ratchet
and verify that remaining plugs are tight (2.5 ft-lbs). Attach drain line to
pan with ¾” male pipe thread PVC fittings. Hand tight is adequate – do
not over tighten & do not reduce drain line size!
Route drain line(s) line so they will not be exposed to freezing temperatures
and do not interfere with accessibility to the coil, air handling system or
filter. The drain should be pitched downward 1” per 10’ with a 2” trap as
close to the coil as possible. If line makes a second trap, or has an extended
run before termination, a vent tee should be installed after the trap closest
to the pan. See Figure 16.
If the coil is located in or above a living space where damage may occur
from condensate overflow, a separate ¾” drain must be provided from the
secondary drain connection. Run this drain to a place in compliance with
local installation codes where it will be noticed when unit is operational.
Condensate flowing from the secondary drain indicates a plugged primary
drain. Prime the trap with water. Test line for leaks. Test water flow with
unit in operation. An auxiliary drain pan should also be installed under the
unit as specified by most local building codes.
Figure 16: Condensate drain

19
6.8- INSTALLATION OF INTERFACE CARD
Installation of the interface card is made easy on the Dettson’s Chinook
and Supreme furnaces. Installation port has been designed on these
furnaces. See Figure 17 and Figure 18 for proper location and
attachment.
See electrical diagrams, Figure 9 for proper connections with thermostat,
furnace and outdoor unit.
For all other brand of furnaces, see Figure 20 for proper connections.
Note that the performance of the outdoor unit will be affected and
will not modulate.
QUICK SETUP
Erreur ! Source du renvoi introuvable.
Figure 17: Chinook gas furnace
Figure 18: Supreme electric furnace
6.8.1- Evaporator temperature sensor installation
1- Attach the provided temperature sensor to the evaporator coil
as shown
2- Get the wire through the refrigerant line opening
3- Cut the wire and skin the conductors. Add wire length if
necessary
4- Connect the two conductors to T1 and TC on the interface card.
The polarity is not important
Figure 19: Evaporator Temperature Sensor–

20
Figure 20: Legacy furnace or air handler
6.9- INSTALLATION OF CONNECTION PIPE
Align the center of the pipe flare with the relevant valve.
Screw in the flare nut by hand and then tighten the nut with spanner and
torque wrench referring to the following;
Table 3: Tubing torque tightening
Figure 21: Tubing tightening
6.10- INSTALLATION OF THE OUTDOOR UNIT
6.10.1-Electrical wiring
1. Remove the handle on the right side plate of outdoor unit;
2. Remove cord anchor. Connect and fasten power connection cord
to the terminal board;
3. Secure the power connection cord with cord anchor;
4. Make sure the wires have been fastened properly.
NOTE:
Incorrect wiring may cause malfunction.
After the wires have been fastened, ensure there is free space between the
connection and fastening places on the main wire.
6.10.2-Air purging and leakage test
1. Connect charging hose of manifold valve to charge end of low
pressure valve (both high/low) must be tightly shut);
2. Connect joint of charging hose to vacuum pump;
3. Fully open the handle of Lo manifold valve;
4. Open the vacuum pump for vacuumization. At the beginning,
slightly loosen joint nut of low pressure valve to check if there is
air entering. Then, tighten the nut;
5. Keep evacuating for more than 15 min. and make sure the reading
of multi-meter is -1,0x10
5
pa(-76 cmHg);
6. Fully open high/low pressure valves;
7. Remove charging hose from charging end of low pressure valve;
8. Tighten bonnet of low pressure valve. ( as shown below)
6.10.3-Outdoor unit condensate drainage
During heating operation, the condensate and defrosting water should be
drained through the drain hose. Install the outdoor drain connector in a
@.98in hole on the base plate, and attach the drain hose to the connector
so that the waste water formed in the outdoor unit can be drained. The hole
@0.98 must be plugged. Whether to plug other holes or not will be
determined by the technician.