TriTherma MQD-8 Installation guide

(Heating, Cooling and Domestic Hot Water)
MANUAL OF INSTALLATION,
OPERATION AND MAINTENANCE
SPLIT MULTIFUNCTIONAL
AIR TO WATER HEAT PUMP
MQD-14
MQD-17
MQD-20
MQD-8
MQD-23
MQD-11

INDEX
1. INTRODUCTION
2. DESCRIPTION OF UNIT
3. TECHNICAL DATA
4. DIMENSIONS
5. SERVICE AREA
6. INSTALLATION
7.STARTING UP
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1
1
4
6
7
8
19
PANEL8.CONTROL
9.UNIT OPERATION
10.TROUBLE SHOOTING
11.SOLAR SYSTEM CONNECTION
12.MAINTENANCE
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20
21
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27
28
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29
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1. INTRODUCTION
The unit purchased by you has been subjected to strict quality control before leaving the factory. It also me
on it. The repair and maintenance must be con ducted by your service / maintenance installer.
It is the responsibility of the installation company performing the installation in accordance with the characteristics the project,
subject to the regulations. Before installating the necessary equipment read this manual, and carry out the directions and obserations
in it.
The manufacturer does not responds to any damages
You should check the receiving unit, which is in perfect condition. If otherwise appropriate to make a written complaint to the carrier.
3
ets the safetystandards
of the CE. Do not tamper with the unit ,or subject to conditions of work not specified in this manual, you may lose any guarantee
and / or indirect, caused by improper installation.
The equipment should be installed only by a duly accredited professional.
2. DESCRIPTION OF UNIT
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Item Part
1 Electric
2 Plate heat exchanger
3 Electric
4 Water control
5 Wire controller
6 Water
7 Air discharge
8 Safety
9 Expansion
10 Pressure
11 Electric 3 way
12 Water
13 Needle
1
4
5
10 12
11
9
7
3
3
13
2
box
heater
PCB
tank
valve
valve
tank
Gauge
valve
pump
valve
Name
6
8

2. DESCRIPTION OF UNIT
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1. Electronic board outdoor
2. Compressor Capacitor
3. Compressor Contactor
4. Condenser fan motor
5. Low Pressure switch
6. 4-way valve
7. Injection Valve
8. Injection pressure (high) switch
9. High pressure switch
10. Liquid service valve
11. Gas service valve
12. Compressor
13. Compressor crankcase
14. Outdoor fan
15. Outdoor Fan Motor
16. Suction accumulator
17. Compressor soft startcapacitor
18. Liquid separator
19. Compressor soft starter
20. Defrost sensor
21. Outside air temperature sensor
22. Discharge tube
23. Thermal expansion valve
24. Transformer
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4
  




































 






2. DESCRIPTION OF UNIT
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5
1. Electronic board outside
2. Compressor Contactor
3. Condenser fan motor
4. . Low Pressure switch
5. 4-way valve + coil
6. Injection valve +coil
7. Injection pressure (high) switch
8. High pressure
9. Liquid service valve
10. Gas service valve
11. Compressor
12. Compressor crankcase
13. Outdoor fan
14. Outdoor Fan Motor
15. Suction accumulator
16. Liquid separator
17. Defrost sensor
18. Outside air temperature sensor
19. Discharge tube
20. Thermal expansion valve
21. Transformer










































3. TECHNICAL DATA
 %$
* Capacities and consumption based on the following conditions:
- Heating: Temperature inlet / outlet water 30/35 ° C. Temperature wet / dry air 6 ° C / 7 ° C.
- Cooling: Temperature inlet / outlet water 23/18 ° C. Dry air temperature 35 º C.
- DHW: Outlet water temperature 45 º C. Temperature wet / dry air 6 ° C / 7 ° C.
* Refrigerant charge is valid for a line length of 5 meters.
* The net weight of the indoor unit does not include the weight of accumulated water in it.
* The sound pressure level is measured at 5 meters from the unit.
6
MQD-8 MQD-14 MQD-17 MQD-20 MQD-23
Capacity Nominal KW 8.42 14.2 16.5 19.5 22.7
Consumption Nominal KW 1.98 3.45 3.92 4.33 5.2
COP W/W 4.25 4.12 4.21 4.5 4.37
Capacity NominalKW KW 7.96 14.5 17.1 19.8 23
Consumption Nominal KW 2.45 4.46 5.21 5.11 6.05
EER W/W 3.25 3.25 3.28 3.87 3.8
Capacity Nominal KW 7.8 12.9 15.8 17.75 21
Consumption Nominal KW 2.2 3.49 4.05 4.57 5.52
COP W/W 3.55 3.7 3.9 3.88 3.8
Power supply V/Ph/Hz
Gas line Inch 5/8”
Liquid line Inch
Compressor type
Refrigerant type
Refrigerant charging volume Kg. 1.9 2.95 4,50 4.6 5.2
Inner water tank Litre
Pressure max climate Bar
Climate expansion tankvolume Litre
Climate output mm
DHW water output mm
Tap water/Climate/DHW water input mm
DHW/Climate safety valve mm
Drain valve mm
Unit Dimension Indoor unit mm
(HeightxWeightxLength) Outdoor unit mm 830x700x300 960x970x345 1260x970x345 1460x970x345 1497x1090x383
PackedDimensions Indoor unit mm
(HeightxWeightxLength) Outdoor unit mm 955x860x395 1080x1085x465 1390x1085x465 1590x1085x465 1630x1210x503
Net weight Indoor unit Kg. 52 55 56 57 59
Outdoor unit Kg. 52 100 120 130
Packedweight Indoor unitr Kg. 58 61 62 63 64
Outdoor unit Kg. 62 112 135 147
Noise level Indoor unit dB(A)
Outdoor unit dB(A) 43 49 51 52 58
Maxpipe length m
Max height difference m
Minwater flow L/S 0.38 0.7 0.8 0.9 1
730*460*322
830*550*425
28
50
30
6
25
25
25
15
15
3/4”
3/8”
Scroll
R-410A
12
7
Heating
Cooling
D.H.W.
TECNICAL CHARACTERS
400/3/50
230/1/50 230/1/50, 400/3/50
Rotary
MQD-11
10.3
2.45
4.2
10.6
3.21
3.3
9.56
2.45
3.9
5/8”
2.4
860x870x325
980x985x415
54
75
60
85
48
0.5

3.ELECTRICS DATA
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7
* Temp. Input / Output water 23/18 ° C. Outdoor air temp. dry bulb 35 ° C.
** Temp. Input / Output water 30/35 ° C. Wet / dry air temp 6 ° C / 7 ° C.
*** Temp. water outlet 45 ° C. Wet / dry air temp 6 ° C / 7 ° C.
OPERATING LIMITS
8.:*<260252<;
7742607-.
Tª Outdoor Air Temp ºC
Temperatura Salida de Agua ºC
8.:*<260252<;
.*<2607-.
Tª Outdoor Air Temp ºC
Temperatura Salida de Agua ºC
8.:*<260252<;
(7-.
Tª Outdoor Air Temp ºC
Temperatura Salida de Agua ºC
TECNICAL CHARACTERS MQD-8 MQD-14 MQD-17 MQD-20 MQD-23
Operating Voltage V/Ph/Hz 230/1/50 230/1/50 230/1/50 380/3/50 380/3/50
Voltage mín V 205 205 205 360 360
Voltage max V 253 253 253 440 440
Consume
kW 2.45 4.5 4.82 5.2 6.05
A 10.86 19.57 20.96 7.9 9.19
kW 1.98 3.55 3.67 4.15 5.2
A 8.78 15.43 15.96 6.31 7.9
kW 2.2 3.49 4.05 4.57 5.52
A 9.76 15.17 17.61 6.94 8.39
kW 3.3 5.63 6.03 6.5 7.56
A 14.64 24.48 26.22 9.88 11.49
kW 3.06 5.33 5.51 6.23 7.8
A 13.59 23.17 23.96 9.47 11.85
kW 2.51 4.47 5.18 5.85 7.07
A 11.14 19.43 22.52 8.89 10.74
Max D.H.W..
Nominal Cooling *
Nominal Heating **
Nominal Domestic hot water ***
Max Cooling
Max Heating

4.DIMENSIONS
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Dimensions in mm.
C
8
D
Gasline
Connection
Liquid
Connection
E
B
A
730
460
330
Outdoor unit MQD-8E/MQD-14E

4. DIMENSIONES
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A
C
D
MODEL
Electrical
Connections
Gasline Connection
Liquid Connection
E
B
DIMENSIONS (in mm)
Panel to Access
Electrical Box
MQD-8
MQD-14
MQD-17
MQD-20
A
830
960
1.260
1.460
B
700
970
970
970
C
300
345
345
345
D
350
415
415
415
E
450
640
640
640
9
5.SERVICE AREA
The following is the minimum space needed to carry out the tasks of service and maintenance of the units.
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 %
Dimensions in mm.
200
1.000
300
500

10
6.INSTALLATION
Here are a series of recommendations to follow for proper installation of the unit.
Installation,repair and maintenance of these units must be made with caution because the presence of electrical,
electronic and circuit pressure system refrigerant.Only trained and qualified personnel should perform all
installation,adjustment and maintenance unit.
The manufacturer declines all liability for negligence and breach of safety standards described below:
- Work in total safety, free from obstacles and clean environment.
- Comply with regulations.
- Before commissioning of the unit, excellent condition confirm the same and its components.
- Wear safety goggles and gloves while working. Use quenching cloth during operations welding.
- Put in place strong units that can support the weight bearing and allow the right posterior maintaining it.
- Use the specified cables and make a proper connection at the terminals.
- Make a separate attack unit.
- Check the supply voltage corresponds to the plate.
- Perform the corresponding ground.
- Perform the work safely install hydraulic and drainage pipes as shown of this manual.
- During operation of the drive circuit part5s refrigerant.(compressor line download) can reach temperatures.
inside the unit.
- The unit can work in environments "normal" residential, commercial or light industry. The unit can not be installed in
explosive atmosphere environment. For applications Special should consult the manufacturer.
Before starting the installation or maintenance operations of the unit disconnect switch general power. Electrical
shock can cause personal injury.
above 70 º C. Take special care when accessing the
6.1 SAFETY CONSIDERATIONS
Very Important!
MOST IMPORTANT!
1. Make sure it is not in cooling mode during first operation or test running, until you make sure
the air conditioning water pump is working properly and water circuit is recycling soothly.
2. Recommand to test the water pump working condition and water circuit directly before switch
on the heat pump.
3. Select a big enough water pump for the air conditioning water circuit.
4. Always keep the electricity connnection with the heat pump to enable inner antifreeze
function wich is valid with electrcity supply.

6.INSTALLATION
Inspect units of receipt to verify any damage or damage during transport. If the unit is damaged you must file a claim
immediately to the company who made the shipment.
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The indoor unit is designed for installation inside the
housing. For this, the inner cabinet has the same action at its base
that a common household. It also has the possibility of
adjust its height due to small height-adjustable feet.
When installed inside the unit must be left open the door area
access, being necessary to leave the spaces described in paragraph
7 (Service Areas).
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The outdoor unit must be placed in proper orientation to
climatic characteristics of the region where it is installed.
It should be positioned so that air circulation is free and well
avoid recirculation effects detrimental to performance.
When installing the outdoor unit must be left free the front of the
unit, which is necessary to leave the spaces described in paragraph 7
(Service).
11
All hydraulic connections are labeled as shown in Figures 1 and 2:
1. Refrigerant Liquid valve
2. Refrigerant gas valve
3. Air conditioning water outlet
4.Domestic hot water outlet
5.Water inlet
6.2 Location of units
6.3 Hydraulic connections




6. INSTALLATION
It is necessary to conduct the outlet safety valves of the tank to drain
There is one water pump build inside of our heat pump indoor unit, but the installer need to calculate water flow required and to
overcome the pressure drop during installation machine.
Please check the wiring diagram with the unit for the water pump electricity connection.
A small pump may cause a malfunction or even a fault irreparable.
12
Hydraulic Circuit Connection
Water Pump
Important:
The selection of air conditioning water pump out of the unit should take based on the flow rates
of cooling and heating,internal drop unit (see graph) and the drop of the facility.
Calculation of nominal water flow:
Q water (l / h) = Cooling Capacity* 0.86 (Kcal / h) / T (º C)
As T = (T first exit water temp - water return Temp) _T = 5 º C
Example: ModelMQD-14
Q water=(14,600W * 0.86) Kcal / h / 5 °C=2500 l/h
! #%% The temperature difference in air conditioning heat exchanger should be 5 º C approx.A high temperature
difference can cause a malfunction of the unit and even irreparable damage to it.
Water flow (m3 / h)
1 m.c.a = 10 Kpa
The graph indicates the pressure drop of cooling water circuit of the unit (components inside the unit).
Pressure drop (m.c.a)
MQD-20
MQD-14
MQD-8
MQD-17
There is one built in water pump(C1) for both DHW and air conditioning. But additional water pump for DHW(C2)
and water pump for air conditioning(C3) can be applied according to actual installation.
Tritherma air conditioning Pressure Drop in Hydraulic Circuit
Air Conditioning Water Pump Selection
It is important keep enough water flow to ensure the heat pump optimized COP and
keep the whole system safe.

The water shortage in cooling operation could cause irreparable damage to the unit.
A water flow switch must be installed outside the unit for air conditioning operation to avoid any damage to the unit. The control
The DHW water tank must be with coil heat exchanger inside, so the tank water is clean and seperated with heat pump
After all connection is finished, connect the power supply, NOT SWITCHING ON THE UNIT.
-Open the tap water and let the tap water go into the heat pump hydraulic recycle.
-Open air discharge valve of inner water tank on the top and open air discharge valves of all fan coils. The water pump
-Close air discharge valve when water comes out continuously.
- Open a point of hot water consumption to flush the system.
* A water regulation valve(Normally 1.5-2.5 bar) must be installed before tap water go into the heat pump inlet.
* Check the correct rotation of water pump axis after uncover the maintenance screw with a scew driver.
.Before assure the water pump is working well and water flow is correct, Put the unitin HEATING mode.
- Check the water pressure gauge installed in the control panel of indoor unit, it must be between 1 and 2.5 bar
(normal 1.5 bar) for properoperation.
- Ensure that all secondary facility is found with water pressure and completely purged of air. The existence of air
in the air conditioning circuit can cause irreparable damage unit.For this reason, air discharge valve should be
installed in the highest part of the hydraulic circuit to remove all air from the system.
Water Flow Switch
Important:
Filling and pressure testing for Hydraulic Circuit
6. INSTALLATION
hydraulic recycle.
maintenance screw
choose air conditioning heating mode to fill the air conditioning side.
-Switch the inner 3 way valve to fill water for both side :
heating temp to 10 centigrade.
maintenance screw can also be loosed to purge air.
should be connect to IN5 of indoor unit control board.
In order to avoid compressor running, firstly set both Domestic hot water target temp and air conditioning
-Set target water temp back after complete installation and check everything ok
Turn on the unit and choose DHW mode, after DHW side air is purged completedly and filled with water,
13

14
6.INSTALLATION
-It is recommanded to connect the air conditioning water pump directly to the electricity, ie, turn on water pump
only for air conditioning circuit for some time,to eliminate the existence of such air circuit.
Do not connect the unit for operation of the pump. When connecting the unit and not the water pump
independently, it could cause irreparable damage in the unit.
-A mesh water filter must be installed outside before the water return to the plate heat exchanger as show Figure 7
whose mission is to retain dust or dirt which might remain in the cooling circuit of the house.
Figure 7
The dirt from the installation may cause irreparable damage to the unit.
- Once the connections and filling, and prior to starting the unit, it is recommended operating the air conditioning
circuit pump for a while, to retain the mesh filter particles and impurities that could be installed. To this should be
wired air conditioning pump directly to the network.
- Once that is done, and the pump stopped, it should close the stopcocks of input and output on the water circuit
drain water tank through the drain valve and clean the filter. Then fill again the circuit.
- To ensure that no dirt on the circuit, should make this operation as often as necessary.
- Having ensure that the air cooling circuit is clean, insert glycol, if necessary, approximately 20% -30% for cold area.
- Should perform periodic reviews, including cleaning the filter and to ensure that there is no dirtinside the water
circuit. Especially in the first installation.
Attention!
Attention!
During cold climate area, inserting Glycol is necessary to make sure the heat pump won't be damaged during
Attention!
electricity accident. Keep always electricity connection to ensure auto antifreeze.
If the heat pump won't be used for a long time, please drain the system water out.

6.INSTALLATION
- The installer must protect the power line drive disconnecting devices
circuit breaker suitable for installation in accordance with the legislation.-
- The power to the unit must be within a range of voltage (see table consumption electric page 8).
- It should pay special attention to the connection of ground wire. The ground wire must be of a
larger than the cable phases. .
- Remove the access panel to the control panel located on the front side of the unit.
- Check that the network characteristics match the data on the nameplate of the unit.
- Perform power and interconnection between the interior and exterior units through the 2 presses on the side of
.Figure 8
Electric power
supply
Signal wires
interconnection
- Ensure that power cords have the correct section for the total consumption unit. See table below.
support guides, so we have access to the terminals of the unit .
15
automatic magneto-thermal switch and
length slightly
the unit.
6.4 ELECTRICAL CONNECTIONS
Before any electrical installation work to ensure that the main switch is disconnected
General Recommendations
Preliminary operations
In the outdoor unit:
In the indoor unit:
Before commissioning of the unit must perform the following connections:
- Mains supply (outdoor unit), Figure 8.
- Interconnection between the outer and inner drive, figures 8.
Power supply (connection and interconnection between units)
Checking Wiring diagram with the unit before connection
Unscrewing the unit control box, moving outward through
MODEL Outdoor Power SUPPLY Indoor power SUPPLY COMMINICATION
MQD-8 3 x 4 mm
SIGNAL
2 x 0,5 mm
(no polarity)
MQD-14
MQD-17
MQD-20
3 x 4 mm
5 x 6 mm
3 x 4 mm 2 x 0,5 mm
(no polarity)
2 x 0,5 mm
(no polarity)
*The power to the indoor unit can proceed directly network or coming from the outdoor unit.
3 x 4 mm
3 x 4 mm

6.INSTALLATION
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
16
2 communication cables no polarity
3 x 4 mmcables of SUPPLY 230/1/50
SUPPLY
ELÉCTRIC
2 communication cables no polarity
3 x 4 mm cables de SUPPLY
380-425/3/50
SUPPLY
ELÉCTRIC
Model:MQD-8/14 Model:MQD-17/20
The installer must protect the power line of the unit with devices
breaker,suitable for installation according to law.
Power cables of the unit type can not be lighter than coated flexible cable
The commissioning of the unit in an incorrect line voltage is not covered under warranty
and its length must be greater than that of the wires.
automatic switch ,circuit breaker and circuit
connecting cable
Very Important: Protection against indirect contact
Pay special attention to the connection of the protective earth cable. Must be the first
Indoor Wiring Diagram
2nd AC Switch Usage (Connect to IN7)
The 2nd switch function enable our heat pump to be controlled by any additional user's thermostat
or remote switches for convenient control.
Function: When 2nd switch is off, the heat pump AC mode will run on standby mode no matter the AC
water temp reach target or not. When 2nd switch is on, the heat pump will run according to set temp.
A Connected to
manual switch
.B Connected to any user's thermostat.C Connected to both manual switch
together with any user's thermostat
.
IN7(10)
2nd

6.INSTALLATION
17
Outdoor Unit 1 phase
Outdoor Unit 3 phases

18
6.INSTALLATION
The interconnection lines refrigerant is as follows:
- The indoor unit has identified the taking of gas and liquid, with stickers identifying, the
follows:
Gas line: Gas (coolant) / Gas (refrigerant)
Liquid line: liquid (coolant) / Liquid (refrigerant)
- All refrigerant connections, as well as water, are threaded.
- You have to isolate the lines to avoid condensation and heat loss.
- Once you have installed the lines, to empty into the circuit refrigerant indoor unit until a
-1 Kg/cm2 pressure for at least 2 hours.
- The discharge circuit refrigerant and refrigerant charge can be made through service valves
sideoftheoutdoorunit.
- Check for leaks in the circuit refrigerant.
6 26-77:=62<
indoor unit (see paragraph 6.Dimensiones scheme) and since the connections are made .
The indoor unit comes with a dry nitrogen load incorporated. The refrigerant lines of the units
interior are a series of adapters and nuts to ensure proper seal until use.
6 &% #&%
The outdoor unit is shipped with a load of R - 410A applies to a line length
maximum equivalent of 5 meters. For lengths over 5 meters is necessary to add load according
located on the right
6.5 REFRIGERANT SYSTEM CONNECTIONS
General considerations
Connection between indoor and outdoor units
to the table in paragraph 6.7

6.INSTALLATION
Once the connection refrigerant system between indoor and outdoor, and once it has been found
tightness of this connection, we proceed to the realization of the vacuum in the unit to which it will
the following process:
-With the outdoor unit’s service valves closed (as the unit is delivered from
the factory), remove the plugs of these service valves.
- Connect the pressure gauge connection in the following way:
Make the low pressure gauge connection to the gas service valve.
Make the high pressure gauge connection to the liquid service valve.
Make the centre bridge of the gauge connection to the vaccum pump.
- keep the pump running and open the valves of the bridge of gauges,
so that we ensure the refrigerant circuit system depression by both
refrigerant lines and the indoor unit.
- Perform a vacuum to ensure that the gauge indicates 1 bar.
-Once the vacuum to turn off the bridge of gauges and off the vacuum pump,
making sure that pressure is maintained vacuum for at least 15 minutes.
-If pressure is not stable means there is a leak in the circuit, so you need to
locate and remedy it. Once cured repeat the above steps.
-If vacuum pressure is stable (it may already be done when
necessary refrigerant charge) disconnecting the bridge
Manometer pressure
Low High
gauge of the vacuum pump first, and keep the bridge
gauge closed ends connected to the valves
or service lines, as appropriate for each model.
Vaccum
Pump
- The outdoor unit is shipped with a charge of refrigerant R-410A is valid for a
length of line maximum equivalent of 5 meters.
- Perform opening the service valves.
- For superior line lengths to 5 meters, recharge the unit as shown in table recharge
refrigerant.
1. -To recover all the refrigerant charge in the outdoor unit for maintenance, just to shut off the liquid valve.
Operate the heat pump in cooling mode. After the pressure is reduced to 0 Pa, shut off the gas valve.
19
6.6 CONDUCT OF VACUUM REFRIGERANT SYSTEM INSTALLATION
NOTE:
2. - If the outdoor unit is more than 5 meter higher than indoor unit, please make a "U" shape or "O" shape
for every 5 meter.

6.INSTALLATION
The outdoor unit incorporates the refrigerant charge (R410A) necessary for the proper functioning of
the unit to a length of interconnecting pipe 5 meters.
If the interconnection line is greater than 5 meters, we should make a refrigerant addiction
according to the following table:
Additional refrigerant charge (g / m)
DIÁMETER 3/8” 5/8” 3/4”
LÍQUID
GAS
60
-
-
8
-
10
20
-
Enter the refrigerant charge in liquid phase
.
In the outdoor unit has two pressure connections (suction and
compressor discharge), through which pressure can be measured
evaporation and condensation of the system in any
three functions (DHW, Heating and Refrigeration).
Indoor unit incorporates two pressure taps, which
DHWand heating mode with high pressure measured,
and cooling mode with low pressure.
High or low pressure, depending
Operating mode
Low pressure High pressure
6.7 REFRIGERANT CHARGE (R-410A)
6.8 PRESSURE MEASUREMENT LOCATION
NOTE:
OUTDOOR UNIT
INDOOR UNIT