Delta 21UT024C24 User manual

www.delta-dct.com
Vogue Ultra Universal
21UT Series
INSTRUCTION MANUAL
WARNING!
Read and follow all safety precautions in
Instruction Manual - improper use can cause
serious injury.

CONTENTS
1 Safety Precautions ......................................................................................... 1
2 Outline of the Unit and Main Parts................................................................... 2
3 Preparative for Installation............................................................................... 3
3.1 Standard Accessory Parts .......................................................................... 3
3.2 Selection of the Installation Location.......................................................... 3
3.3 Connection Pipe Requirement ................................................................... 5
3.4 Electrical Requirement ............................................................................... 5
4 Installation of the Unit...................................................................................... 7
4.1 Installation of the Indoor Unit...................................................................... 7
4.2 Installation of the Outdoor Unit................................................................... 9
4.3 Matters need Attention ............................................................................. 10
4.4 Installation of the Connection Pipe........................................................... 10
4.5 Vacuum and Gas Leakage Inspection...................................................... 14
4.6 Installation of the Drain Pipe .................................................................... 16
4.7 Electrical Wiring........................................................................................ 18
5 Installation of Controllers............................................................................... 22
5.1 Installation of Controllers Mainbord Code Setting: .................................. 22
6 Test Running.................................................................................................. 23
6.1 Trial Operation and Testing ...................................................................... 23
6.2 Working Temperature Range.................................................................... 25
7 Troubleshooting and Maintenance ................................................................ 26
7.1 Troubleshooting........................................................................................ 26
7.2 Routine Maintenance ............................................................................... 27

Floor Ceiling Air-Conditioning 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 ame, 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 rmly 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 specied
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.

Floor Ceiling Air-Conditioning Unit
2
2 Outline of the Unit and Main Parts
Fig.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.

Floor Ceiling Air-Conditioning Unit
3
3 Preparative for Installation
3.1 Standard Accessory Parts
The standard accessory parts listed below are furnished and should be used as required.
Table 1
Indoor Unit Accessories
No. Name Appearance Q'ty Usage
1Nut with Washer 8To x the hook on the cabinet of the
unit.
2Wireless
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
5Installation
Paperboard 1 To insulate the drain pipe
6Fastener 4 To fasten the sponge
7Corrugated pipe
(48/60K) 1Used to connect indoor and outdoor gas pipes
8 Damping Block 1 Used to cover the throttle to lower
the airow noise of refrigerant
3.2 Selection of the Installation Location
WARNING!
The unit must be installed where strong enough to withstand the weight of the unit and xed 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 ammable gas.
③ .
Children under 10 years old must be supervised not to operate the unit.

Floor Ceiling Air-Conditioning Unit
4
Decide the installation location with the customer as follows:
3.2.1 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 airow can reach
every corner of the room.
(3) Leave service space around the unit as required in Fig.2.
◆Floor type
>600
>1000
>300
>600
>1500
◆Ceiling type
>300
>600
>600 >1500
>200>2300
Fig.2
(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.
3.2.2 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 xed
securely.
(1) Outdoor Unit must be xed on stable and solid surface of oor.
(2) Don’t install Outdoor Unit under window or between buildings, and prevent the operation
noise from room.
(3) There should be no obstructions at both air inlet and outlet of indoor and outdoor units for
maintaining well air ventilation.

Floor Ceiling Air-Conditioning Unit
5
(4) When installing indoor unit, make sure that the hanging parts at top are strong enough to
stand the weight of unit.
>1000mm>1000mm
>1000mm >1000mm
Floor
Floor
>3000mm
>800mm
Fig.3
3.3 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 2
Model
Connecting Pipe (inch) Maximum
length
(m)
Maximum
height
(m)
Drainage pipe(Outer Diameter ×
wall thickness) (mm)
Liquid Gas
21UT024C24 3/8 5/8 15 15 17×1.75
21UT036C24 3/8 3/4 30 15 17×1.75
21UT048C24 3/8 7/8 30 15 17×1.75
21UT060C24 1/2 7/8 30 15 17×1.75
◆The connecting pipe should be thermally insulated properly.
◆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.
3.4 Electrical Requirement
Electric Wire Size and Fuse Capacity.
Table 3
Indoor Units
Power Supply Fuse Capacity Breaker Capacity Min. Power Supply Cord
V/Ph/Hz A A mm2
220/230/1/60 1.46 15 1.3
220/230/1/60 1.46 15 1.3
220/230/1/60 3.60 15 1.3
220/230/1/60 3.60 15 1.3
21UT024C24
21UT036C24
21UT048C24
21UT060C24

Floor Ceiling Air-Conditioning Unit
6
Table 4
Outdoor Units
Power Supply Fuse Capacity Breaker
Capacity
Min. Power
Supply Cord
V/Ph/Hz A A mm2
31VA024C24 220/230/1/60 24.83 20 2.10
31VA036C24 220/230/1/60 41.93 40 5.30
31VA048C24 220/230/1/60 51.88 50 8.40
31VA060C24 220/230/1/60 65.83 60 8.40
“*” the fuse is located on the main board.
Notes:
① .
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.
② .
The specications of the breaker and power cable listed in the table above are determined
based on the maximum power (maximum amps) of the unit.
③ .
The specications 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 modied according to the related national standard.
④ .
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 modied
according to the related national standard.

Floor Ceiling Air-Conditioning Unit
7
4 Installation of the Unit
4.1 Installation of the Indoor Unit
4.1.1 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 be careful.
Fig.4
Table 5
Unit:mm
Model A B C D H
1220 225 1158 280 700
1220 225 1158 280 700
1420 245 1354 280 700
1420 245 1354 280 700
21UT024C24
21UT036C24
21UT048C24
21UT060C24

Floor Ceiling Air-Conditioning Unit
8
4.1.2 Indoor Unit Installation
(1) Determine the location of the hanger through the paper template, and then remove the
paper template.
Paper template

Anchor bolt
Fig.5
(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
Wall
Left side panel
Right side panel
Paper template
Fig.6

Floor Ceiling Air-Conditioning Unit
9
◆Ceiling type
40
Ceiling
Suspension
bolt
Spring
washer
Nut
Nut
Hanger
Right side
panel
Left side panel
Fig.7
(6) Adjust the height of the unit to make the drain pipe slant slightly downward so that the
drainage will become much smoother.
4.2 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 xed
securely.
Outdoor Unit Dimension:
A
B
C
Fig.8

Floor Ceiling Air-Conditioning Unit
10
Table 6
Unit: mm
Item
Model ABC
610 546 546
735 610 610
735 710 710
735 710 710
4.3 Matters need Attention
(1) Before installation, make sure that the power supply comply with in nameplate and check
the security of the power supply.
(2) Do not use or place combustible and explosive gas or liquid near the air conditioner.
(3) Do not attempt to install Air Conditioner by yourself to guarantee the Air Conditioner can be
permanent use.
(4) In the event of malfunction(burning smell, etc.),stop operation immediately and turn off the
power switch.
(5) Do not insert ngers or objects into the outlet port or inlet grillers.
(6) Do not check or repair the Air Conditioner when it is running.
(7) Do not sprinkle water on the Air Conditioner or operate it with wet hands.
(8) Do not climb or place objects on the air conditioner.
4.4 Installation of the Connection Pipe
4.4.1 Gas pipe connection of 48/60k unit
(1) A 7/8” gas pipe is used for connection.
(2) Cut the connection pipe with the pipe cutter and remove the burrs.
(3) Take out the corrugated pipe subassembly from the attached bag.
(4) Insert 7/8” gas pipe into the corrugated pipe and x them well by welding.
Note: Refer to the diagram shown in the attachment
4.4.2 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 are nuts at the stop valve of the indoor unit, then insert them to the connection
pipe, after that, are the connection pipe with a aring tool.
(4) Check if the are part is spread evenly and there are no cracks, as shown in the Fig.9.
Fig.9
31VA024C24
31VA036C24
31VA048C24
31VA060C24

Floor Ceiling Air-Conditioning Unit
11
4.4.3 Bending Pipes
(1) The pipes are shaped by your hands. Be careful not to collapse them.
Fig.10
(2) Do not bend the pipes in an angle more than 90°.
(3) When pipes are repeatedly bent or stretched, the material will harden, making it difcult to
bend or stretch them any more. Do not bend or stretch the
pipes more than three times.
(4) When bending the pipe, do not bend it as is. The pipe will
be collapsed. In this case, cut the heat insulating pipe
with a sharp cutter as shown in Fig.11, and bend it after
exposing the pipe. After bending the pipe as you want, be
sure to put the heat insulating pipe back on the pipe, and
secure it with tape.
Fig.11
Pipe
Cutter
Cutt line
Heat insulating
pipe
CAUTION!
① .
To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of
curvature of 150 mm or over.
② .
If the pipe is bent repeatedly at the same place, it will break.
4.4.4 Connecting the Pipe at the Indoor Unit Side
Detach the caps and plugs from the pipes.
CAUTION!
① .
Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is
improper, the are nut cannot be tightened smoothly. If the are nut is forced to turn, the
threads will be damaged.
② .
Do not remove the are nut until the connection pipe is to be connected so as to prevent
dust and impurities from coming into the pipe system.
Centering the pipe against port on the indoor unit, turn the are nut with your hand.
When the are nut is tightened properly by your hand, use a torque wrench to nally tighten it.

Floor Ceiling Air-Conditioning Unit
12
Fig.12
Table.7 Flare nut tightening torque
Pipe Diameter
(inch)
Tightening Torque
(N·m)
3/8 35-40
1/2 45-50
5/8 60-65
3/4 70-75
7/8 85-90
Note: After all ,cover the throttle by a damping block from the attached bag to lower the airow
noise of refrigerant.
4.4.5 Connecting the Pipe at the Outdoor Unit Side (Fig.13)
(1) Refer to Table.8 for eld tubing diameters. The pipe must remain round. Do not crimp end of
the line.
Table.8 Refrigerant Line Set Inches (mm)
Model Valve Field Connections
Liquid Line Gas Line
3/8 inch 5/8 inch
3/8 inch 3/4 inch
3/8 inch 7/8 inch
1/2 inch 7/8 inch
Line set size matches
service valve connection Do not crimp service valve connector
whenpipe is smaller than connection
Fig.13
31VA024C24
31VA036C24
31VA048C24
31VA060C24

Floor Ceiling Air-Conditioning Unit
13
(2) Remove service cap and core from both the gas and liquid line service ports.
Service port core
Service port cap
Liquid line
service valve
Gas line
service valve
Service port core
Service port cap
Fig.14
(3) Flow regulated nitrogen (at 1 to 2 psig) through the low−side refrigeration gauge set into the
liquid line service port valve, and out of the gas line service port valve.
Liquid line
Use regulator to flow
nitrogen at 1 to 2 psig
Liquid line service valve
Gas line service valve
Gas service port must be open
to allow exit point for nitrogen
Gas line
OUTDOOR
UNIT
INDOOR
UNIT
Fig.15
(4) To help protect service valve seals during brazing, wrap water saturated cloths around
service valve bodies and copper tube stubs. Water saturated cloths must remain water
saturated throughout the brazing and cool−down process.
Braze line to the service valve.
When brazing line set to
service valves, point flame
away from service valve.
Water saturated
cloth
Fig.16
After all connections have been brazed, disconnect manifold gauge set from service ports.
Apply water saturated cloths to both services valves to cool piping. Once piping is cool, remove all
water saturated cloths. Reinstall service cap and core. Refer to the unit installation instructions for
the next step in preparing the unit.

Floor Ceiling Air-Conditioning Unit
14
4.4.6 Checking the Pipe Connections for Gas Leaking
For both indoor and outdoor unit side, check the joints for gas leaking by the use of a gas
leakage detector without fail when the pipes are connected.
4.4.7 Heat Insulation on the Pipe Joints (Indoor Side Only)
Stick coupler heat insulation (large and small) to the place where connecting pipes.
Fig.17
4.5 Vacuum and Gas Leakage Inspection
CAUTION!
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation! There
is no extra refrigerant in the outdoor unit for air purging!
4.5.1 Vacuum
(1) Remove the caps of the liquid valve, gas valve and also the service port.
(2) Connect the hose at the low pressure side of the manifold valve assembly to the service
port of the unit’s gas valve, and meanwhile the gas and liquid valves should be kept closed
in case of refrigerant leak.
(3) Connect the hose used for evacuation to the vacuum pump.
(4) Open the switch at the lower pressure side of the manifold valve assembly and start the
vacuum pump. Meanwhile, the switch at the high pressure side of the manifold valve
assembly should be kept closed, otherwise evacuation would fail.
(5) The evacuation duration depends on the unit’ capacity, generally, 30 minutes for the 24/36K
units, 45 minutes for the 42/48/60 units. And verify if the pressure gauge at the low pressure
side of the manifold valve assembly reads -1.0Mp (-75cmHg), if not, it indicates there is leak
somewhere. Then, close the switch fully and then stop the vacuum pump.
(6) Wait for some time to see if the system pressure can remain unchanged, 5 minutes for the
24K units, 10 minutes for 48/60K units. During this time, the reading of the pressure gauge
at the low pressure side can not be larger than 0.005Mp (0.38cmHg).
(7) Slightly open the liquid valve and let some refrigerant go to the connection pipe to balance
the pressure inside and outside of the connection pipe, so that air will not come into the

Floor Ceiling Air-Conditioning Unit
15
connection pipe when removing the hose.
Note: that the gas and liquid valve can be opened fully only after the manifold valve assembly is
removed.
(8) Place back the caps of the liquid valve, gas valve and also the service port.
Hose with the valve pin
gauge manifold
pipe
pipe
Fig.18
Note: For the large-sized unit, it has the service port for both the gas valve and the liquid valve.
During evacuation, it is available to connect two hoses of the manifold valve assembly to two
service ports to quicken the evacuating speed.

Floor Ceiling Air-Conditioning Unit
16
4.5.2 Additional Charge
Refrigerant suitable for a piping length of 5m is charged in the outdoor unit at the factory.
When the piping is longer than 7 m, additional charging is necessary.
For the additional amount, see Table 9.
Table 9
Item
Model Additional Refrigerant Amount for Extra Pipe Length
54 g/m
54 g/m
54 g/m
110 g/m
4.6 Installation of the Drain Pipe
4.6.1 Precautions When Doing the Piping Work
(1) Keep piping as short as possible and slope it downwards at a gradient of at least 1/100 so
that air may not remain trapped inside the pipe.
(2) Keep pipe size equal to or greater than that of the connecting pipe.
(3) Install the drain piping as shown and take measures against condensation. Improperly
rigged piping could lead to leaks and eventually wet furniture and belongings.
Extension drain piping
(commercially available)
Insulating tube
(commercially
available)
Indoor unit
drain hose
Insulating tape
(accessory)
Fig.19
(4) Connect the drain hose.(Fig.20)
Drain hose must
slope downward.
Allow no trap to
form in the piping
Do not allow end
of hose to touch
water
Fig.20
31VA024C24
31VA036C24
31VA048C24
31VA060C24