McQuay MQS-174018-CFC216A User manual

Indoor Unit
Outdoor Unit
MQS-174018-CFC216A MQIU-174018-HCU216A
MQS-174024-CFC216A MQIU-174024-HCU216A
MQS-174036-CFC216A MQIU-174036-HCU216A
MQS-174048-CFC216A MQIU-174048-HCU216A
MQS-174060-CFC216A MQIU-174060-HCU216A
 Thank you for choosing Air Conditioners, please read this owner’s manual carefully before operation and
retain it for future reference.
DC Inverter
Installation and Operation Manual
Floor Ceiling Type Unit

Contents
1 Safety Precautions ..................................................................................... 1
2 Outline of the Unit and Main Parts ............................................................. 2
4 Preparative for Installation ......................................................................... 9
4.1 Standard Accessory Parts.............................................................................9
4.2 Selection of the Installation Location .............................................................10
4.3 Connection Pipe Requirement ......................................................................12
4.4 Electrical Requirement ..................................................................................12
5 Installation of the Unit ................................................................................ 14
5.1 Installation of the Indoor Unit ........................................................................14
5.2 Installation of the Outdoor Unit ...................................................................... 17
5.3 Installation of the Connection Pipe ............................................................... 18
5.4 Vacuum and Gas Leakage Inspection ......................................................... 22
5.5 Installation of the Drain Pipe ........................................................................ 24
5.6 Electrical Wiring ............................................................................................ 26
6 Installation of Controllers ........................................................................... 30
7 Test Running ...............................................................................................30
7.1 Trial Operation and Testing.......................................................................... 30
7.2 Working Temperature Range ....................................................................... 32
8 Troubleshooting and Maintenance ............................................................. 33
8.1 Troubleshooting ............................................................................................33
8.2 Routine Maintenance ................................................................................... 34
3 User's manual of remote controller............................................................. 3
3.1 Buttons on remote controller ........................................................................... 3
3.2 Introduction for icons on display screen .......................................................... 3
3.3 Introduction for buttons on remote controller ................................................... 4
3.4 Function introduction for combination buttons ..................................................7
3.5 Operation guide ............................................................................................... 8
3.6 Replacement of batteries in remote controller ..................................................8

DC Inverter U-match Series Floor Ceiling Type Unit
1
1 Safety Precautions
WARNING!
This mark indicates procedures which, if improperly performed, might lead to the
death or serious injury of the user.
CAUTION!
This mark indicates procedures which, if improperly performed, might possibly
result in personal harm to the user, or damage to property.
WARNING!
(1). For operating the air conditioner pleasantly, install it as outlined in this installation manual.
(2). Connect the indoor unit and outdoor unit with the room air conditioner piping and cord available
from our standard parts. This installation manual describes the correct connections using the
installation set available from our standard parts.
(3). Installation work must be performed in accordance with national wiring standards by authorized
personnel only.
(4). If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in
contact with a flame, it produces toxic gas.
(5). Do not power on until all installation work is complete.
(6). During installation, make sure that the refrigerant pipe is attached firmly before you run the
compressor.
 Do not operate the compressor under the condition of refrigerant piping not attached properly
with 2-way or 3-way valve open.
 This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even
injury.
(7). During the pump-down operation, make sure that the compressor is turned off before you remove
the refrigerant piping.
 Do not remove the connection pipe while the compressor is in operation with 2-way or 3-way
valve open.
 This may cause abnormal pressure in the refrigerant cycle that leads to breakage and even
injury.
(8). When installing and relocating the air conditioner do not mix gases other than the specified
refrigerant (R410A) to enter the refrigerant cycle.
 If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an
abnormally high value and cause breakage, injury, etc.
(9). This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for their
safety.
(10). Children should be supervised to ensure that they do not play with the appliance.
(11). If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualified persons in order to avoid a hazard.

DC Inverter U-match Series Floor Ceiling Type Unit
2
2 Outline of the Unit and Main Parts
Fig. 2.1
Notes:
①.The connection pipe and duct for this unit should be prepared by the user.
②.This unit is standard equipped with the rectangular duct.
Air inlet
Air outlet

3.2 Introduction for icons on display screen
Send signal
Turbo mode
Set temperature
Set time
TIMER ON / TIMER OFF
Child lock
Up & down swing
Set fan speed
X-fan mode
Light
Temp. display type
:Set temp.
:Outdoor ambient temp.
:Indoor ambient temp.
Sleep mode
Clock
Heat mode
(opotional)
Fan mode
Dry mode
Cool mode
Auto mode
Operation mode
3.1Buttons on remote controller
1
2
3
4
5
6
7
8
9
10
11
ON/OFF button
MODE button
+/- button
FAN button
button
X-FAN button
Note: X-FAN is the same with BLOW
TURBO button
LIGHT button
SLEEP button
TIMER ON/TIMER OFF
button
CLOCK button
4
2
5
910
11
7
3
6
81
3
3 User's manual of remote controller

● When selecting auto mode, air conditioner will operate automatically according
to ex-factory setting. Set temperature can’t be adjusted and will not be displayed
as well. Press "FAN" button can adjust fan speed. Press " " button can adjust
fan blowing angle.
● After selecting cool mode, air conditioner will operate under cool mode. Cool
indicator " "on indoor unit is ON. Press "+" or "-" button to adjust set tempe-
rature. Press "FAN" button to adjust fan speed. Press " " button to adjust fan
blowing angle.
● When selecting dry mode, the air conditioner operates at low speed under dry
mode. Dry indicator " " on indoor unit is ON. Under dry mode, fan speed can’t
be adjusted. Press " " button to adjust fan blowing angle.
● When selecting fan mode, the air conditioner will only blow fan, no cooling and
no heating. All indicators are OFF. Press "FAN" button to adjust fan speed. Press
" " button to adjust fan blowing angle.
● When selecting heating mode, the air conditioner operates under heat mode.
Heat indicator " " on indoor unit is ON. Press "+" or "-" button to adjust set
temperature. Press "FAN" button to adjust fan speed. Press " " button to adjust
fan blowing angle. (Cooling only unit won’t receive heating mode signal. If setting
heat mode with remote controller, press ON/OFF button can’t start up the unit).
Note:
● For preventing cold air, after starting up heating mode, indoor unit will delay 1~5
minutes to blow air (actual delay time is depend on indoor ambient temperature).
● Set temperature range from remote controller: 16~30℃; Fan speed: auto, low
speed, medium speed, high speed.
3.3 Introduction for buttons on remote controller
Note:
● After putting through the power, the air conditioner will give out a sound.
Operation indictor " " is ON (red indicator). After that, you can operate the air
conditioner by using remote controller.
ON/OFF button
MODE button
1
2
Press this button can turn on or turn off the air conditioner. After turning on the air
conditioner, operation indicator " "on indoor unit’s display is ON (green indicator.
The colour is different for different models), and indoor unit will give out a sound.
Press this button to select your required operation mode.
AUTO COOL FANDRY HEAT
4

3.3Introduction for buttons on remote controller
FAN button
4
Pressing this button can set fan speed circularly as: auto (AUTO), low( ) ,medium
( ), high( ).
Auto
Note:
● Under AUTO speed, air conditioner will select proper fan speed automatically
according to ex-factory setting.
● Fan speed under dry mode is low speed.
5
Press this button can select up&down swing angle. Fan blow angle can be selected
circularly as below:
● When selecting " ", air conditioner is blowing fan automatically. Horizontal
louver will automatically swing up & down at maximum angle.
● When selecting " 、、、、 ", air conditioner is blowing fan at xed
position. Horizontal louver will stop at the xed position.
● When selecting " 、、 " , air conditioner is blowing fan at xed angle.
Horizontal louver will send air at the xed angle.
● Hold " "button above 2s to set your required swing angle. When reaching your
required angle, release the button.
Note:
● " 、、" may not be available. When air conditioner receives this signal, the
air conditioner will blow fan automatically.
button
no display
(horizontal louvers stops
at current position)
+/- button
3
● Press "+" or "-" button once increase or decrease set temperature 1℃.
Holding "+" or "-" button, 2s later, set temperature on remote controller will
change quickly. On releasing button after setting is nished, temperature indica-
tor on indoor unit will change accordingly. (Temperature can’t be adjusted under
auto mode)
● When setting TIMER ON, TIMER OFF or CLOCK, press "+" or "-" button to
adjust time. (Refer to CLOCK, TIMER ON, TIMER OFF buttons) When setting
TIMER ON, TIMER OFF or CLOCK, press "+" or "-" button to adjust time. (Refer
to CLOCK, TIMER ON, TIMER OFF buttons)
5

Press this button to set clock time. " " icon on remote controller will blink. Press
"+" or "-" button within 5s to set clock time. Each pressing of "+" or "-" button, clock
time will increase or decrease 1 minute. If hold "+" or "-" button, 2s later, time will
change quickly. Release this button when reaching your required time. Press
"CLOCK" button to conrm the time. " " icon stops blinking.
Note:
● Clock time adopts 24-hour mode.
● The interval between two operation can’t exceeds 5s. Otherwise, remote contro-
ller will quit setting status. Operation for TIMER ON/TIMER OFF is the same.
CLOCK button
6
3.3Introduction for buttons on remote controller
TIMER ON / TIMER OFF button
7
● TIMER ON button
"TIMER ON" button can set the time for timer on. After pressing this button, " "
icon disappears and the word "ON" on remote controller blinks. Press "+" or "-"
button to adjust TIMER ON setting. After each pressing "+" or "-" button, TIMER
ON setting will increase or decrease 1min. Hold "+" or "-" button, 2s later, the
time will change quickly until reaching your required time.
Press "TIMER ON" to conrm it. The word "ON" will stop blinking. " " icon
resumes displaying. Cancel TIMER ON: Under the condition that TIMER ON is
started up, press "TIMER ON" button to cancel it.
● TIMER OFF button
"TIMER OFF" button can set the time for timer off. After pressing this button," "
icon disappears and the word "OFF" on remote controller blinks. Press "+" or "-"
button to adjust TIMER OFF setting. After each pressing "+" or "-" button, TIMER
OFF setting will increase or decrease 1min. Hold "+" or "-" button, 2s later, the
time will change quickly until reaching your required time.
Press "TIMER OFF" word "OFF" will stop blinking. " " icon resumes displaying.
Cancel TIMER OFF. Under the condition that TIMER OFF is started up, press
"TIMER OFF" button to cancel it.
Note:
● Under on and off status, you can set TIMER OFF or TIMER ON simultaneously.
● Before setting TIMER ON or TIMER OFF, please adjust the clock time.
● After starting up TIMER ON or TIMER OFF, set the constant circulating valid.
After that, air conditioner will be turned on or turned off according to setting time.
ON/OFF button has no effect on setting. If you don’t need this function, please
use remote controller to cancel it.
6

3.3 Introduction for buttons on remote controller
X-FAN button
8
Press this button under cool and dry mode to start up x-fan function, and " " icon
on remote controller will be displayed. Press this button again to cancel x-fan
function, and " "icon will disappear.
Note:
● When x-fan function is on, if the air conditioner is turned off, indoor fan will still
operate at low speed for a while to blow the residual water inside the air duct.
● During x-fan operation, press X-FAN button to turn off x-fan function. Indoor fan
will stop operation immediately.
TURBO button
9
Under COOL or HEAT mode, press this button to turn to quick COOL or quick
HEAT mode. " " icon is displayed on remote controller. Press this button again
to exit turbo function and " " icon will disappear.
Press this button to turn off display light on indoor unit. " " icon on remote
controller disappears. Press this button again to turn on display light. " " icon is
displayed.
Under COOL, HEAT or DRY mode, press this button to start up sleep function.
" " icon is displayed on remote controller. Press this button again to cancel sleep
function and " " icon will disappear.
SLEEP button
LIGHT button
10
11
3.4 Function introduction for combination buttons
Child lock function
Press "+" and "-" simultaneously to turn on or turn off child lock function. When
child lock function is on, " " icon is displayed on remote controller. If you operate
the remote controller, the " " icon will blink three times without sending signal to
the unit.
Temperature display switchover function
Under OFF status, press "-" and "MODE" buttons simultaneously to switch temp-
erature display between ℃and ℉.
7

1. After putting through the power, press "ON/OFF" button on remote controller to
turn on the air conditioner.
2. Press "MODE" button to select your required mode: AUTO, COOL, DRY, FAN,
HEAT.
3. Press "+" or "-" button to set your required temperature. (Temperature can’t be
adjusted under auto mode).
4. Press "FAN" button to set your required fan speed: auto, low, medium and high
speed.
5. Press " " button to select fan blowing angle.
3.5 Operation guide
3.6 Replacement ofbatteries in remote controller
1. Press the back side of remote controller marked
the cover of battery box along the arrow direction.
2. Replace two 7# (AAA 1.5V) dry batteries, and
make sure the position of "+" polar and "-" polar
are correct.
3. Reinstall the cover of battery box.
battery
Cover of
battery box
remove
reinstall
Note:
● During operation, point the remote control signal sender at the receiving
window on indoor unit.
●The distance between signal sender and receiving window should be no
more than 8m, and there should be no obstacles between them.
or wireless telephone; remote controller should be close to indoor unit during
operation.
● Replace new batteries of the same model when replacement is required.
● When you don’t use remote controller for a long time, please take out the
batteries.
● If the display on remote controller is fuzzy or there’s no display, please
replace batteries.
8

DC Inverter U-match Series Floor Ceiling Type Unit
9
4 Preparative for Installation
4.1 Standard Accessory Parts
The standard accessory parts listed below are furnished and should be used as
required.
Table 3.1
Indoor Unit Accessories
No.
Name
Appearance
Q'ty
Usage
1
Nut with Washer
8
To fix the hook on the
cabinet of the unit.
2
Wireless Controller +
Battery
1+2
To control the indoor unit
3
Insulation
1
To insulate the gas pipe
4
Insulation
1
To insulate the liquid pipe
5
Installation Paperboard
2
To insulate the drain pipe
6
Fastener
4
To fasten the sponge
7
Nut
1
To connect gas pipe
8
Nut
1
To connect liquid pipe
Table 3.2
Outdoor Unit Accessories
No.
Name
Appearance
Q'ty
Usage
1
Drain Plug
3
To plug the unused drain
hole.
2
Drainage Connecter
or
1
To connect with the hard
PVC drain pipe

DC Inverter U-match Series Floor Ceiling Type Unit
10
4.2 Selection of the Installation Location
WARNING!
The unit must be installed where strong enough to withstand the weight of the unit and fixed
securely, otherwise the unit would topple or fall off.
CAUTION!
①. Do not install where there is a danger of combustible gas leakage.
②. Do not install the unit near heat source, steam, or flammable gas.
③. Children under 10 years old must be supervised not to operate the unit.
Decide the installation location with the customer as follows:
4.2.1 Indoor Unit
(1). Install the unit at a place where is strong enough to withstand the weight of the
unit.
(2). The air inlet and outlet of the unit should never be clogged so that the airflow
can reach every corner of the room.
(3). Leave service space around the unit as required in Fig. 3.1.
◆ Floor type
◆ Ceiling type
Fig. 3.1

DC Inverter U-match Series Floor Ceiling Type Unit
11
(4). Install the unit where the drain pipe can be easily installed.
(5). The space from the unit to the ceiling should be kept as much as possible so
as for more convenient service.
4.2.2 Outdoor Unit
WARNING!
①. Install the unit where it will not be tilted by more than 5°.
②. During installation, if the outdoor unit has to be exposed to strong wind, it must be fixed securely.
If possible, do not install the unit where it will be exposed to direct sunlight. (If
necessary, install a blind that does not interfere with the air flow.)
(1). Install the outdoor unit in a place where it will be free from being dirty or getting
wet by rain as much as possible.
(2). Install the outdoor unit where it is convenient to connect with the indoor unit.
(3). Install the outdoor unit where the condensate water can be drained out freely
during heating operation.
(4). Do not place animals and plants in the path of the warm air.
(5). Take the air conditioner weight into account and select a place where noise
and vibration are small.
(6). Install the outdoor unit where is capable of withstanding the weight of the unit
and generates as less noise and vibration as possible.
(7). Provide the space shown in Fig. 3.2, so that the air flow is not blocked. Also for
efficient operation, leave three of four directions of peripheral constructions
open.
Unit: mm
Fig. 3.2

DC Inverter U-match Series Floor Ceiling Type Unit
12
4.3 Connection Pipe Requirement
CAUTION!
The maximum length of the connection pipe is listed in the Table below. Do not place the units
between which the distance exceeds the maximum length of the connection pipe.
Table 3.3
Item
Model
Size of Fitting
Pipe(Inch)
Max. Pipe
Length (m)
Max. Height
Difference between
Indoor Unit and
Outdoor Unit (m)
Drainage pipe(Outer
Diameter × wall
thickness) (mm)
Liquid
Gas
MQS-174018-CFC216A
MQIU-174018-HCU216A
1/4
1/2
20
15
φ17×1.75
3/8
5/8
30
15
φ17×1.75
3/8
5/8
30
15
φ17×1.75
3/8
5/8
50
30
φ17×1.75
3/8
3/4
50
30
φ17×1.75
Notes:
①.The connecting pipe should be thermally insulated properly.
②.The pipe wall thickness shall be 0.5-1.0 mm and the pipe wall shall be able to
withstand the pressure of 6.0 MPa. The longer the connecting pipe, the lower
the cooling and heating effect performs.
③.The pipe wall thickness shall be 0.5-1.0 mm and the pipe wall shall be able to
withstand the pressure of 6.0 MPa. The longer the connecting pipe, the lower
the cooling and heating effect performs.
4.4 Electrical Requirement
Electric Wire Size and Fuse Capacity.
Table 3.4
Indoor Units
Power Supply
Fuse Capacity
Breaker
Capacity
Min. Power
Supply Cord
V/Ph/Hz
A
A
mm2
18K~60K
220-240V~ 60Hz
5
6
1.0
MQS-1740 24-CFC216A
MQIU-174024-HCU216A
MQS-1740 36-CFC216A
MQIU-174036-HCU216A
MQS-1740 48-CFC216A
MQIU-174048-HCU216A
MQS-1740 60-CFC216A
MQIU-174060-HCU216A

DC Inverter U-match Series Floor Ceiling Type Unit
13
Table 3.5
Model
Power
Supply
Capability of Air
Switch(A)
Minimum Sectional Area
Of Earth Wire (mm2)
MQIU-174018-HCU216A
220-240V~ 60Hz
16
1.5
20
2.5
25
2.5
40
6.0
40
6.0
Notes:
①.The fuse is located on the main board.
②.Install the disconnect device with a contact gap of at least 3 mm in all poles
nearby the units (Both indoor unit and outdoor unit).The appliance must be
positioned so that the plug is accessible.
③.The specifications of the breaker and power cable listed in the Table above
are determined based on the maximum power (maximum amps) of the unit.
④.The specifications of the power cable listed in the Table above are applied to
the conduit-guarded multi-wire copper cable (like, YJV copper cable,
consisting of PE insulated wires and a PVC cable jacket) used at 40°С and
resistible to 90°С(see IEC 60364-5-52). If the working condition changes, they
should be modified according to the related national standard.
⑤.The specifications of the breaker listed in the Table above are applied to the
breaker with the working temperature at 40°С. If the working condition
changes, they should be modified according to the related national standard.
⑥.Take 2 pieces of power cord of 0.75 mm2 as the communication lines between
indoor and outdoor unit, with their longest lengths of 50m. Please select the
appropriate line length as per the actual installation conditions. The
communication lines can not be twisted together. For the unit (≤24K), it’s
recommended to use 8m long communication line.
⑦.Take 2 pieces of power cord of 0.75mm2 as the communication lines between
the wired controller and the indoor unit, with their longest lengths of 30m.
Please select the appropriate line length as per the actual installation
conditions. The communication lines can not be twisted together. It’s
recommended to use 8m long communication line.
⑧.The wire size of the communication line should be no less than 0.75 mm2. It’s
recommended to take 0.75 mm2 power cords as the communication line.
MQIU-174024-HCU216A
MQIU-174036-HCU216A
MQIU-174048-HCU216A
MQIU-174060-HCU216A

DC Inverter U-match Series Floor Ceiling Type Unit
14
5 Installation of the Unit
5.1 Installation of the Indoor Unit
5.1.1 Indoor unit dimension
WARNING !
①. Install the indoor unit in a location which can withstand a load of at least five times the weight of the
main unit and which will not amplify sound or vibration.
②. If the installation location is not strong enough, the indoor unit may fall and cause injuries.
③. If the job is done with the panel frame only, there is a risk that the unit will come loose. Please take
care.
Fig. 4.1
Table 4.1
Model
A
B
C
D
H
MQS-174018-CFC216A
1220
225
1158
280
700
1420
245
1354
280
700
1700
245
1634
280
700
5.1.2 Preparation for Installing the Indoor Unit
(1). Open the air inlet grille and the screw cover, and remove the screws.
(2). Release the claws in the 3 places indicated.
MQS-174024-CFC216A
MQS-174036-CFC216A
MQS-174048-CFC216A
MQS-174060-CFC216A

DC Inverter U-match Series Floor Ceiling Type Unit
15
(3). Release the center hook and remove the front panel.
(4). Release the claws in the 2 or 3 places indicated and remove the electric
component cover.
5.1.3 Indoor Unit Installation
(1). Determine the location of the hanger through the paper template, and then
remove the paper template.
Fig. 4.2
(2). Insert the anchor bolts into the drilled holes, and drive the pins completely into
the anchor bolts with a hammer.
(3). Remove the right and left side panels.
(4). Put the hanger bolt into the clasp of the indoor unit and tighten screws on the
hanger to prevent the indoor unit from moving.
(5). Reinstall and tighten the right and left side panels.
◆Floor type
Fig. 4.3

DC Inverter U-match Series Floor Ceiling Type Unit
16
◆Ceiling type
Fig. 4.4
(6). Adjust the height of the unit to make the drain pipe slant slightly downward so
that the drainage will become much smoother.
5.1.4 Leveling
The water level test must be done after installing the indoor unit to make the unit is
horizontal, as shown below.
Fig. 4.5

DC Inverter U-match Series Floor Ceiling Type Unit
17
5.2 Installation of the Outdoor Unit
WARNING
①. Install the unit where it will not be tilted by more than 5°.
②. During installation, if the outdoor unit has to be exposed to strong wind, it must be fixed securely.
5.2.1 Outdoor unit dimension
Fig. 4.6
Table 4.2 Unit: mm
Item
Model
A
B
C
D
E
MQIU-174018-HCU216A
955
396
700
560
360
980
427
790
610
395
1107
440
1100
631
400
958
412
1349
572
376
1085
427
1365
620
395
5.2.2 Condensate Drainage of the Outdoor Unit(Only for the heat
pump unit) (Fig. 4.7)
(1). It is required to install a drain pipe for the outdoor unit to drain out the
condensate water during heating operation. (only for the heat pump unit)
(2). When installing the drain pipe, apart from the drain pipe mounting hole, all
other holes should be plugged so as to avoid water leakage.(only for the heat
pump unit)
MQIU-174024-HCU216A
MQIU-174036-HCU216A
MQIU-174048-HCU216A
MQIU-174060-HCU216A

DC Inverter U-match Series Floor Ceiling Type Unit
18
(3). Installation Method: Insert the pipe joint into the hole φ25 located at the base
plate of the unit and then connect the drain pipe to the pipe joint.
Fig. 4.7
5.3 Installation of the Connection Pipe
5.3.1 Flare Processing
(1). Cut the connection pipe with the pipe cutter and remove the burrs.
(2). Hold the pipe downward to prevent cuttings from entering the pipe.
(3). Remove the flare nuts at the stop valve of the outdoor unit and inside the
accessory bag of the indoor unit, then insert them to the connection pipe, after
that, flare the connection pipe with a flaring tool.
(4). Check if the flare part is spread evenly and there are no cracks (see Fig. 4.8).
Fig. 4.8
5.3.2 Bending Pipes
(1). The pipes are shaped by your hands. Be careful not to collapse them.
Fig. 4.9
(2). Do not bend the pipes in an angle more than 90°.