Dettson COND-UHD-09 Assembly instructions

INSTALLATION INSTRUCTIONS AND
HOMEOWNER’S MANUAL
Models:
COND-UHD-09
COND-UHD-12
COND-UHD-18
COND-UHD-24
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 appropriatly.
Do not install any metering device on the indoor coil. The expension 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-UHD -09 -12 -18 -24
Liquid line dia (In) 1/4 1/4 1/4 1/4
Gas line dia (In) 1/2 1/2 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.
Manufactured by:
Dettson Industries Inc.
Sherbrooke, Qc, Canada
www.dettson.com
Printed in Canada on 2020-05-08 X40259 Rev.A
100% recycled paper

Table of Contents
1 SAFETY 3
1.1 Warning......................... 3
1.2 Caution.......................... 3
2 Specifications 4
3 Installation 5
3.1 Notices.......................... 5
3.2 Installation Site . . . . . . . . . . . . . . . . . . . . 5
3.3 Safety Precautions for Electric Appliances. 5
3.4 Clearances....................... 6
3.5 IndoorCoil ....................... 6
3.6 Interface Board (K03081) . . . . . . . . . . . . . 6
3.7 OutdoorUnit...................... 7
3.8 Connection Pipes . . . . . . . . . . . . . . . . . . 8
3.9 OperationTest..................... 8
4 Troubleshooting 9
4.1 Interface Board . . . . . . . . . . . . . . . . . . . . 9
4.2 Outdoor Unit Error Codes . . . . . . . . . . . . 10
5 Commissioning Checklist 11
6 Replacement Parts 12
List of Figures
Figure 1: Installation and Clearances . . . . . 6
Figure 2: Winting Interface Board to ODU . . 7
Figure 3: Indoor Coil Sensor Location . . . . 7
Figure 4: Tube Tightening . . . . . . . . . . . 8
Figure 5: Interface Board . . . . . . . . . . . . 9
Figure 6: ODU Serial Number Location . . . . 11
Figure 7: Exploded View 9k and 12k . . . . . 12
Figure 8: Exploded View 18k and 24k . . . . . 14
List of Tables
Table 1: Outdoor Unit Specifications . . . . . 4
Table 3: Checklist After Installation . . . . . . 8
Table 2: Tubing Torque Tightening . . . . . . 8
Table 4: Interface Board Display . . . . . . . 9
Table 5: Outdoor Unit Error Codes . . . . . . 10
Table 6: Parts List 9k and 12k . . . . . . . . . 13
Table 7: Parts List 18k and 24k . . . . . . . . 15
2

1 SAFETY
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, 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
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.
1.1 Warning
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 con-
nections 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.
1.2 Caution
CAUTION
• Never install the unit in a place where a combustible
gas might leak, it may lead to fire or explosion;
• Provide a ground fault interrupter (GFI) 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.
3

2 Specifications
Table 1 – Outdoor Unit Specifications
Model COND-UHD-09 COND-UHD-12 COND-UHD-18 COND-UHD-24
Power Supply 208/230 VAC, 60 Hz, 1 phase
Cooling Capacity (min-max) BTU/h 9000 (1535-12996) 12000 (2900-15354)18000 (4094-21837) 22000 (6800-30700)
Heating Capacity (min-max) BTU/h 9000 (2388-13648) 12200 (3071-18766) 18000 (4094-24566)24000 (6800-32000)
Cooling Input (min-max) W 540 (50-1400) 785 (75-1500) 1330 (350-2500) 1700 (450-3700)
Heating Input (min-max) W 590 (200-1500) 940 (250-1600) 1500 (350-2500) 2000 (380-3700)
Rated Input W 1500 1600 2500 3700
Rated Current A 6.2 6.5 10.8 16.4
MCA A 9 9 22 22
MOCP A 15 15 30 35
EER BTU/h/W 16.5 15.3 13.5 13.0
COP W/W 4.47 3.80 3.52 3.50
SEER 38.0 30.5 24.5 21.5
HSPF 15 14 12 12
Compressor Type Rotary Rotary Rotary Rotary
Compressor LRA A 35 35 30 30
Compressor RLA A 6.9 6.9 15.5 16.0
Compressor Power Input W 1070 1070 2443 2443
Fan Motor RLA A 0.24 0.24 0.65 0.65
Fan Motor Power W 30 30 90 90
Air Flow Volume CFM 2400 2400 2354 2354
Throttling Method Electronic expansion valve
Cooling Amb. Temp. °F 0 - 129
Heating Amb. Temp. °F -22 - 75
Sound Pressure Level dB(A) 53 53 59 59
Unit Dimension (W x H x D) in 35.4 x 23.5 x 14.9 35.4 x 23.5 x 14.9 38.6 x 31.1 x 16.8 38.6 x 31.1 x 16.8
Net Weight lb 99 99 141 148
Refrigerant R410A
Refrigerant Charge oz 45.9 49.4 70.6 81.1
Additional Charge oz/ft 0.2 0.2 0.5 0.5
Pipe Length ft 24.6 24.6 24.6 24.6
Pipe Max Length ft 98 98 130 130
Pipe Max Height ft 49 49 66 98
Pipe Diameter See cover page
4

3 Installation
3.1 Notices
CAUTION
1. This unit must be installed only by authorized
qualified 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.
3.2 Installation Site
Proper installation site is vital for correct and efficient
operation of the unit. Avoid the following sites where:
• Strong heat sources, vapours, flammable gas or
volatile liquids are emitted;
• High-frequency electro-magnetic waves are gene-
rated by radio equipment, welders and medical
equipment;
• Salt-laden air prevails (such as close to coastal
areas);
• The air is contaminated with industrial vapours and
oils;
• The air contains sulphuric gases such as in hot
spring zones;
• Corrosion or poor air quality exists.
For the outdoor unit:
• Select a site where there is sufficient ventilation;
• Select a site where there is no obstructions
blocking the inlet and outlet;
• The site should be able to withstand the full weight
and vibration;
• Select a dry place, and do not expose the unit to
direct sunlight nor strong winds;
• Make sure that the outdoor unit is installed in
accordance with the installation instructions, and is
convenient for maintenance and repair;
• The maximum pipe height and lenght must comply
with unit specifications (table 1).
3.3 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 con-
nected 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.
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: water pipe, gas
pipe, sewer pipe, or other 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.
5

3.4 Clearances
Figure 1 – Installation and Clearances
3.5 Indoor 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°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.
A splashguard is included for horizontal installations
(multiposition colis). In downflow and counter flow
configurations, aluminum foil tape must be applied to seal
the top edge of the insulation to the cabinet.
Do not install any metering device on the indoor coil.
The expension valve is located in the outdoor unit.
If a metering device is already installed in the indoor
coil, it must be removed.
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 and 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.
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.
3.6 Interface Board (K03081)
Installation of the interface card is made easy on the
Dettson’s Chinook and Supreme furnaces. Installation
port has been designed on these furnaces. Refer to the
installation instructions provided with the interface board
6

for installation location and thermostat wiring. Wire to the
outdoor unit as shown in the figure.
Figure 2 – Winting Interface Board to ODU
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 appropriatly.
Coil Sensor
With the interface board kit comes a coil sensor. It must
be properly installed.
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 3 – Indoor Coil Sensor Location
3.7 Outdoor Unit
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 cord anchor;
4. Make sure the wires have been fastened properly.
NOTE: Incorrect wiring may cause malfunction.
L1 and L2 must be connected to the 208/230VAC power
supply. The unit must be properly grounded via the
ground terminal.
After the wires have been fastened, ensure there is free
space between the connection and fastening places on
the main wire.
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 -100 kPa(-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.
Condensate Drainage
During heating operation, the condensate and defrosting
water should be drained through the drain hose. Install
the outdoor drain connector in a φ0.98 in 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 φ0.98 in must be plugged. Whether
to plug other holes or not will be determined by the
technician.
7

Table 3 – Checklist After Installation
Items to be checked Possible malfunction
Has the unit been fixed firmly? The unit may drop, shake or emit noise
Has the refrigerant leakage test been performed? It may cause insufficient cooling (heating)
Is thermal insulation sufficient? It may cause condensation
Is water drainage satisfactory? It may cause water leakage
Is the voltage in accordance with the rated voltage It may cause electric malfunction or damage the unit
marked on the nameplate?
Is the electric wiring or piping connection installed It may cause electric malfunction or damage parts
correctly and securely?
Has the unit been securely grounded? It may cause electrical leakage
Is the inlet or outlet blocked? It may cause insufficient cooling (heating)
Have the refrigerant charge and the length The refrigerant charge is not accurate
of connection pipes and been recorded?
3.8 Connection Pipes
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 following the
specifications.
Both refrigerant lines must be separately insulated
in order to avoid condensation and to ensure proper
efficiency.
Table 2 – Tubing Torque Tightening
Hex Nut Diameter Tightening Torque (N·m)
φ615-20
φ9.52 30-40
φ12 45-55
φ16 60-65
φ19 70-75
Figure 4 – Tube Tightening
3.9 Operation Test
Before operation test
1. Do not switch on power before installation is
completely finished;
2. Electric wiring must be connected correctly and
securely;
3. Cut-off valves of the connection pipes should be
opened;
4. All the impurities such as scraps and thrums must
be cleared from the unit.
Operation test method
Switch on power and call for heating or cooling on
thermostat to check whether the operation is normal or
not.
8

4 Troubleshooting
4.1 Interface Board
Figure 5 – Interface Board
Table 4 – Interface Board Display
9

4.2 Outdoor Unit Error Codes
Table 5 – Outdoor Unit Error Codes
# Malfunction LED Flashes Status Causes
Yellow Red Green
1 High pressure protection Unit stops Poor exchange (blockage), ambiant temperature too high, too much
refrigerant
2 Anti-freeze protection 3 ODU stops in cooling Poor air exchange (IDU), abnormal fan speed, dirty evaporator
3 Lack of refrigerant 9 Unit stops Lack of refrigerant, bad evaporator sensor, unit plugged
4 High discharge temp. 7 Unit stops Poor exchange, blocked capillary, ambiant temperature too high, component
malfunction
5 Overcurrent protection 5 Unit stops Unstable power supply, dirty evaporator
6 Communication error ON F Unit stops Wrong connections
7 High temp. protection 6 Unit stops Poor exchange, ambiant temperature too high
8 EEPROM error 11 Unit stops Defective ODU control board
9 Gathering refrigerant 17 Forced cooling Normal cooling mode
10 Ambient sensor error 6 Unit stops Damaged or disconnected sensor
11 Condensor sensor error 5 Unit stops Damaged or disconnected sensor
12 Discharge sensor error 7 Unit stops Damaged or disconnected sensor
13 Frequency limit (overload) 3 Decreased frequency Poor exchange, ambiant temperature too high
14 Frequency limit (overcurrent) 1 Decreased frequency Low input voltage, overload, high system pressure
15 Frequency limit (discharge) 2 Decreased frequency Overload, high temperature, lack of refrigerant, defective EXV
16 Frequnecy limit (anti-freeze) 4 Decreased frequency Poor indoor exchange, fan running too slowly
17 DC bus high voltage 13 Unit stops Supply voltage too high, board malfunction
18 DC bus voltage low 12 Unit stops Supply voltage too low, board malfunction
19 Overload protection 8 Unit stops OVC-COMP wiring loose, lack of refrigerant, capilary blockage, defective
EXV, ambiant temperature too high, poor exchange
20 Abnormal system 6 Unit stops Overload protection, condenser temp. too high, ambiant temp. too high,
poor exchange
21 IPM protection 4 Unit stops Error should disappear on its own, or after a power cycle, or defective board
22 Module temp. too high 10
23 PFC protection 14 Unit stops Bad reactor wiring (L), damaged capacitor
24 Compressor desynchronizing Unit stops IPM protection, overcurrent
25 ODU Fan motor failure 14 Unit stops Motor malfunction, fan blocked, motor disconnected
26 Power protection 9 3-minute cycles Abnormal power supply voltage
27 Frequency limit (power) 13
28 Compressor running 1
29 Temperature reached 8
30 Frequency limit (temperature) 11
31 Normal communication 1
32 Defrosting 2 In heating mode Normal
F: Fixed on or off
B: Blinking
10

5 Commissioning Checklist
Indoor Unit: ______________ s/n#: ______________
Outdoor Unit: ______________ s/n#: ______________
Filter is clean
Line length: ________ ft Line height: ________ ft
Temp sensor position at mid-height on A-coil
A-coil orifice removed
Error code: ________
Temp rise through the coil:
T before: ________ °F
T after: ________ °F
Rise ∆T: ________ °F
Static pressure:
P return: ________ ” W.C.
P supply: ________ ” W.C.
∆P: ________ ” W.C.
Temperature readings:
T ext: ________ °F
T discharge: ________ °F
T condensor tube: ________ °F
T at coil mid-height: ________ °F
Temperature readings:
T ext: ________ °F
T discharge: ________ °F
T condensor tube: ________ °F
T at coil mid-height: ________ °F
In Cooling:
T mesured on suction line (Tm): ________
Converted pressure to temperature: ________
Super heat: ________
Compressor frequency: ________ Hz
In Heating:
Discharge pressure: ________
Compressor frequency: ________ Hz
Notes:
Figure 6 – ODU Serial Number
Location
11

6 Replacement Parts
Figure 7 – Exploded View 9k and 12k
12

Table 6 – Parts List 9k and 12k
# Description COND-UHD-09 COND-UHD-12
1 Front grill 016004060004 016004060004
2 Front panel assy 000003060115 000003060115
3 Fan motor 1501308507 1501308507
4 Clap board 01233510 01233510
5 Chassis sub assy 0280311901P 0280311901P
6 Compressor and fitting 00103977 00103977
7 Valve support sub assy 01703242P 01713115P
8 Cut off valve 07130239 07130239
9 Cut off valve 1/2 0710307901 0710307901
10 Big handle - -
11 Right side plate 0130510002P 0130510002P
12 4 way valve assy 03073360 03073360
13 Capillary sub assy 030006060038 030006000624
14 Condenser assy 011002060037 011002000728
15 Stationary barrier 01703179 01703179
16 Flash vaporizer sub assy 07223057 03007000001
17 Tube clip 02143030 02143030
18 Reactor 43130185 43130185
19 Top panneau/ Cover 012049000006P 012049000006P
20 Electric box cover sub assy 0260309601 0260309601
21 Electric box assy 100002060314 10000100908
22 Motor support sub assy 01703180 01703180
23 Left side plate 01303169P 01303169P
24 Axial flow fan 10333022 10333022
Main board 300027060051 300027000057
Temperature sensor 390007901 3900007901
13

Figure 8 – Exploded View 18k and 24k
14

Table 7 – Parts List 18k and 24k
# Description COND-UHD-18 COND-UHD-24
1 Front grill 016004060005 016004060005
2 Front panel assy 0153501405 0153501405
3 Front side plate 01303249P 01303249P
4 Chassis sub assy 02803315P 017000000166P
5 Electrical heater 7651000411 7651000411
6 Compressor and fitting 00105251 00105251
7 4 way valve assy 030152000081 030152000081
8 Electronic expansion valve assy 030174060029 030174000045
9 Right side plate 0130504402P 0130504402P
10 Valve support sub assy 0170506101P 0170506101P
11 Valve cover 22245003 22245003
12 Cut off valve 0713517901 0713517901
13 Cut off valve sub assy 07133934 07133934
14 Big handle 02115005 02115005
15 Magnet coil 4304000415 4304000415
16 Temperature sensor 3900030901 3900030901
17 Condenser assy 011002000242 011002000340
18 Reactor 43130024 43130024
19 Top Cover sub assy 000051000026 000051000026
20 Condenser support plate 01175092 01175092
21 Motor support sub assy 000046000019 000046000015
22 Left side plate 01305043P 01305043P
23 Left handle - -
24 Brushless DC motor 15010400000102 15010400000102
25 Clap board sub assy 01235091 017021000067
26 Axial flow fan 10335013 10335013
27 Electric box assy 100002000485 100002000598
28 Terminal board 42200006001401 42200006001401
29 Terminal board support sub assy 01715016A 01715016
30 Radiator 49015215 4901521501
31 Main board 300027000040 300027000224
32 Electric box cover 20125002 20125002
15