Johnson Controls York YDEC028, York YDEC036, York YDEC045, York YDEC056, York YDEC071 Installation Manual

VRF Air-Conditioner

Installation Manual

FORM NO.:YDEC IOM-EN(1212)

VRF Air-Conditioner IOM

Model YDEC028 YDEC036 YDEC045 YDEC056 YDEC071
Cooling Capacity kW 2.8 3.6 4.5 5.6 7.1
Heating Capacity kW 3.2 4.0 5.0 6.3 8.0
Power supply - 220V ～ 50Hz
Rated Power W 110 110 130 130 180
Rated Current A 0.55 0.55 0.65 0.65 0.83
Air Flow Rate m3/h 600 600 950 950 1250
External Static Pressure Pa 0
Dimension HxWxD mm 680x1245x240 680x1245x240 680x1245x240 680x1245x240 680x1245x240
Connecting Pipes Liquid/Gas (φ)mm 6.35/9.52 6.35/12.7 6.35/12.7 6.35/12.7 9.52/15.88

Drainage Pipe (φ)mm

Model YDEC080 YDEC090 YDEC112 YDEC140 YDEC160
Cooling Capacity kW 8.0 9.0 11.2 14.0 16.0
Heating Capacity kW 9.0 10.0 12.5 16.0 18.0
Power supply - 220V ～ 50Hz
Rated Power W 210 210 210 250 250
Rated Current A 0.97 0.97 0.97 1.20 1.20
Air Flow Rate m3/h 1550 1550 1550 1950 1950
External Static Pressure Pa 0
Dimension HxWxD mm 680x1245x240 680x1245x240 680x1670x240 680x1670x240 680x1670x240
Connecting Pipes Liquid/Gas (φ)mm 9.52/15.88 9.52/15.88 9.52/15.88 9.52/15.88 9.52/15.88

Drainage Pipe (φ)mm

16(O.D.)

16(O.D.)

VRF Air-Conditioner IOM

Contents

1. SAFETY CAUTIONS ....................................................................................................................... 1

2. BEFORE INSTALLATION ................................................................................................................ 1

3. SELECTION OF INSTALLATION POSITION ...................................................................................... 2

4. INSTALLATION OF INDOOR UNIT .................................................................................................. 2

5. INSTALLATION OF REFRIGERANT PIPING ...................................................................................... 4

6. INSTALLATION OF DRAINAGE PIPING ........................................................................................... 5

7. ELECTRIC CONNECTION ............................................................................................................... 6

1. Safety Cautions

Please carefully read this "Safety Cautions" before
installing air conditioner so as to ensure correct
installation.
The following cautions are divided into two categories,
related to safety and of great importance, please
carefully read.

Warning…Inattention will lead to death or

serious injury.

Caution…Inattention will lead to injury or
machine damage, and may also cause serious injury
according to different conditions.

Warning

 Installation operation must be conducted by

professional personnel. Do not conduct without
approval.

 Please install the air conditioner in a solid place

sufficient to bear the weight.
Instable base may lead to air conditioner falling
and cause damage.

 Please use separate circuit for power supply. The

operation of all the electric parts must be in
accordance with the local laws and specifications
as well as this instruction.

 The operation shall be conducted by the

electrician with professional qualification.
Insufficient capacity or improper electric
operation may cause electric shock or fire hazard.

 Use the specification designated wires; all the

wires shall be connected well to make connecting
terminal and wire free from external force
drawing.
Poor connection and improper installation may
cause fire hazard.

 Straighten out and lay flat when connecting power

line, remote controller and wire controller line so
as to make electric parts and wire slot box cover
fastened down.

 If any refrigerant gas leakage in installation,

immediately open door and window for
ventilation.
The refrigerant gas will generate toxic gas when
meeting combustion sources such as air heater,
furnace and stove.

 Please power off first before touching electronic

parts.

 Do not touch the switch with wet hand.

Touching switch with wet hand may cause electric
shock.

 Air conditioner must be earthed.

Earthing wire shall not be connected to gas pipe,
tap water pipe, lightening rod and telephone line.
Poor earthing may lead to electric shock accident.

VRF Air-Conditioner IOM

 Leakage earthing leakage breaker must be

installed.
If leakage earthing breaker is not installed, there
will be electric shock hazard or fire hazard.

 Please arrange drainage piping according to this

instruction to guarantee smooth drainage, and
insulate the piping in case of condensed water
accumulation.
Improper piping may lead to water leakage and
soak household items.

 Air conditioner, power line and connecting line

shall be far away from more than 1m at least from
such electrical equipment as television set and
radio to prevent from interference of
electromagnetic wave and noise.

 In the room equipped with fluorescent lamp

(inverter or quick start type), the signal
transmission distance of the remote controller may
not reach the preset value.
The indoor machine shall be away from
fluorescent lamp as far as possible.

 Installation should not be conducted in the

following places:

(a) Place where mineral oil smoke or mist or steam

is diffused, for example, kitchen.

Plastic parts may be deteriorated and damaged.

(b) Place where there is corrosive gas such as sulfur

dioxide.
Copper pipe or welding part may be corroded to
cause refrigerant leakage.

(c) Place which is close to the machine generating

electromagnetic wave.
Electromagnetic wave may influence the control
system to make the air conditioner incapable of
normally operating.

(d) Place where there is combustible gas leakage,

carbon fiber or combustible dust floating, or

volatile combustible placing such as gasoline or

diluent.
The use of air conditioner in such places may
cause fire hazard.

 Please do not touch the fin of the heat exchanger.

Improper touch may cause machine damage and
personal injury.

 Please pay special attention to product handling.

Do not handle by lifting PP strap in case of PP
strap rupture to damage unit and harm person.

2. Before Installation

 Air conditioner shall not be unsealed before

moved to the installation site. If it is necessary to
unseal, measures shall be taken after unsealing to
avoid damaging or scratching air conditioner.

 When moving the air conditioner during or after

unsealing, do not apply force to refrigerant piping,
drainage pipe or other plastic parts in order to
avoid damaging air conditioner.

 Before air conditioner installation, please confirm

whether the refrigerant used for the unit is R22 or

1

Hanging bolt

Ceiling

R410a and whether it is consistent with that of
outdoor unit.

 For the installation of outdoor unit, please refer to

the installation and operation instructions attached
for outdoor unit.

3. Selection of Installation Position

Installation position conditions:

 Ceiling strength shall be sufficient to bear the

weight of indoor unit; if not, reinforce first.

 Guarantee good ventilation and make gas flow

free from obstructions shielding.

 Condensed water is capable of being discharged

smoothly.

 There is no combustible gas leakage hazard.
 Ensure adequate installation space.
 Piping length of indoor unit and outdoor unit is

within an allowable range.

VRF Air-Conditioner IOM

indoor unit downside; for holing with diamond,
plastic cloth shall be sticked to wall or other
method may be adopted to prevent water flow to
wall; for holing with electric hammer, dust
prevention measures shall be taken.

4.2 Install the unit

 Install Φ10 hoisting bolts (4).
 After the unit hoisting, conduct piping and wiring

work in ceiling, and determine the outlet direction
of piping after installation site selection.
Especially on the occasion with existing ceiling,
please pull refrigerant piping, drainage pipe,
indoor and outdoor connecting line and remote
controller line to a connection position before
hanging machine.

 Installation method for hoisting bolt.

Match with the existing structure and arrange
thread pitch according to the following shown
machine dimension.
Wooden occasion: arrange hoisting bolt by
mounting square bar on beam

4. Installation of Indoor Unit

4.1 Open wall hole

 Select installation position and determine pipe

passing direction and pipe outlet position.

 Select drill bit according to machine model and

use electric hammer or diamond to open wall
hole.

 Wall hole size in general: recommended wall hole

diameter Φ90mm for below 056 type and
Φ150mm for above 071 type.

 Keep clear of the walls with wire or foreign

matters inside and outside and the superhard walls
as much as possible in holing; the hole inside shall
be 0.5cm~1cm higher than outside considering
drainage; wall hole passing through outlet pipe of
indoor unit side shall be slightly lower than the

Beam

Hoisting bolt

Steel frame occasion: arrange and directly use
supporting angle steel

Hanging bolt

Supporting angle steel

Existing concrete blank occasion:

Newly prepared concrete blank occasion:

2

ing and embedding

VRF Air-Conditioner IOM

Nut

Gasket

(Blade shape
Insertion)

(Slide insertion)

(Pipe hang
screw bolt)

Embedding screw bolt

 Seat installation method.

Please use embedded bolt, expansion bolt, etc.;
the bolt material shall be high-quality carbon steel
(subjected to surface copper plating or other
rust-proof treatment) or stainless steel.

Wedge bolt

Wall

4.3 Install indoor unit

 Use pulley, etc. to hoist indoor unit to hoisting

bolt; use gradienter, etc. to install indoor unit
horizontally; otherwise, it may cause water
leakage.

Hoisting bolt

Hoisting parts

Side plate

Connector at gas side of cooling medium piping

Connector at liquid side of cooling medium piping

Drainage outlet

 For embedded type installation, the procedure is

similar to hoisting mode, but hole must be opened

Hoisting support

Hoisting bolt

on the ceiling before installation, with the
specification as follows: 1170×610 for 028-112
type and 1600×610 for 140-160 type; take down
the right and left cover plates of indoor unit and
then embed one half of main body into the ceiling,
and only expose rear cover plate and head cover.

Hoisting support

 For seat installation, use gradienter to install

3

∮

∮

∮

∮

∮

Torque spanner

Horn mouth nut

indoor unit horizontally and maintain the main
body vertical to the floor. Dismantle pump, small
defrosting tray and water level switch before
installation, strip off the insulated shield of water
level switch connecting line and then screw
together to make short circuit, directly connect
drainage pipe in accessories to the main defrosting
tray outlet (select left or right water outlet of
defrosting tray according to actual installation
condition).

Dismantle pump assembly

Connect defrosting tray with
drainage pipe

VRF Air-Conditioner IOM

prevent dust, moisture or other foreign matter
entering into pipe.

 Except designated refrigerant, anything, for

example, air, shall not mix into refrigerating
circuit.

 Before welding refrigerant piping, please conduct

nitrogen replacement or fill nitrogen into piping in
welding, and finally connect with indoor unit by
horn mouth.

Caution

 When filling nitrogen into piping in welding,

guarantee to control the pressure with reducing
valve as 0.02MPa (0.2kgf/cm2) (like the feel of
breeze blowing cheek).

 Do not use welding flux when welding refrigerant

piping connector. Please use copper base brazing
filler metal without welding flux.
The use of welding flux containing chlorine or
fluorine may corrode the purity of piping or
refrigerating system.

Hook

Bolt

Gasket

Model A B C D E F G H

YDEC028-112 1245 680 150 760 450 1119 200 240

YDEC140-160 1670 680 150 1070 450 1542 200 240

5. Installation of Refrigerant Piping

 The piping at gas side and liquid side of

refrigerant shall be subjected to thermal insulation,
if not, the piping surface will have dew.

 Please use thermal insulation material which is

capable of withstanding above 120℃ high
temperature. Please strengthen thermal insulation
for refrigerant piping according to the installation
environment, otherwise, the surface of the thermal
insulation material may dew and frost.

Caution

Please comply with the following items:

 Coat fatty oil or ether oil at horn mouth (inside

and outside) when connecting horn mouth nut.

 Only use the horn mouth nut attached by the unit.

Other horn mouth nut may lead to refrigerant
leakage.

 Please clamp flat or seal the pipe end in order to

5.1 Piping connection

 When connecting and dismantling piping to/from

air conditioner, simultaneously use an ordinary
spanner and a torque spanner.

Piping connector

 For relevant tightening torque, please refer to the

following table.

Pipe diameter

∮

6.35(1/4") 14.2~17.2

9.53(3/8") 32.7~39.9

∮

12.7(1/2") 49.5~60.3

15.88(5/8") 61.8~75.4

Tightening torque

 If it is necessary to install unit without torque

spanner, comply with the following method:
When using spanner to tighten the horn mouth nut,
the tightening torque on some point may suddenly
increase. Further tighten the horn mouth nut from
this position to the angle shown in the following
table.

Pipe diameter

∮

6.35(1/4") 60°~90° ~150mm

9.53(3/8") 60°~90° ~200mm

12.7(1/2") 45°~75° ~250mm

15.88(5/8") 45°~75° ~300mm

Angle

tightened

further

(N.m)

Length of

recommended

tool arm

4

∆−=

Incline downward

VRF Air-Conditioner IOM

Caution

 Excessive tightening may damage horn mouth and

lead to refrigerant leakage.

5.2 Air tightness leakage detection

 Conduct air tightness leakage detection

confirmation at the end of piping work.

 Leakage detection method:
(a) Fill dry compressed nitrogen into indoor unit and

piping system, and slowly boost the pressure to

4.3MPa;

(b) After maintaining pressure for 10min, coat soapy

water or other foaming agent at the connection
position such as weld and thread joint, and
observe whether there is leakage;

(c) If any leakage, tighten or repair weld leaking

position after pressure relief.

(d) Fill into dry compressed nitrogen again and

slowly boost the pressure to 4.3MPa;

(e) Start to record the reading of pressure gauge after

maintaining pressure for 6h, and then record the
reading of pressure gauge again after 24h;

(f) If no pressure drop, then the air tightness is

qualified. If any pressure drop, find out the
leakage point and repair, and then repeat the
above d and e procedures until qualified.

Caution

 Pressure reading is related to temperature

variation, so the temperature variation factor shall
be considered when judging whether there is
pressure drop. The relation of pressure correction
value and temperature variation is:



+

273

t

2



∗=∆ 1

PP

1



+

273

t

1



2correction

△

P--Pressure correction value (bar)

P

---Corrected pressure value (bar)

correction

P1---The first pressure reading (bar)
P2---The second pressure reading (bar)
t1---Temperature at the first pressure reading ( )℃
t2---Temperature at the second pressure reading
( )℃

 In air tightness test, do not connect indoor unit

and outdoor unit, otherwise, nitrogen may leak to
outdoor unit.




−




PPP

5.3 Thermal insulation

 If no leakage after inspection, respectively wrap

liquid pipe, gas pipe and each connecting position
with thick-enough heat-resistant polyethylene, and
conduct good thermal insulation.

 Field piping must be connected to the piping

connecting part all the time. If poor thermal
insulation for piping, there will be dew outside
and scald if any touch.

6. Installation of Drainage Piping

6.1 Drainage piping installation

 In delivery, the drainage outlet is PVC pipe; in

connecting water pipe, please use auxiliary
sealing material and sleeve.

 Conduct thermal insulation for drainage pipe of

indoor unit, otherwise, condensation may be
caused. The connecting part of indoor unit must
also be subjected to thermal insulation treatment.

 Before installation, please confirm whether the

connection condition of pump defrosting tray and
the surface thermal insulation are intact.

 For drainage pipe connection, use hard PVC

binding agent and confirm there is no leakage.

Thermal insulation material

above 1/100

 The junction of drainage pipe and drainage outlet

of indoor unit must be free from bearing any force,
including water pipe gravity.

 The downward inclination of drainage pipe shall

be above (1/100) and the middle shall be free
from bending.

 The transverse pull-out of drainage pipe shall be

within 20m. If the drainage pipe is longer, please
arrange a support to prevent bending.

 Drainage system joints must be sealed against

water leakage.

 The height from drainage pipe end to ground or

drainage channel bottom shall be larger than
50mm, and the drainage pipe end shall not be put
into water. When directly discharging condensed
water into foul ditch, bend drainage pipe upward
to a U-shaped water seal in order to avoid odor
entering into room through drainage pipe.

 For concentrated construction of drainage pipe of

multiple indoor units during suspended ceiling
installation (with pump), arrange U-shaped bend
at the branch water pipe connecting each indoor
unit to prevent water return from main drainage
pipe.

 For seat installation, dismantle pump assembly,

and directly connect the drainage pipe of
accessories to drainage outlet of defrosting tray.

5

Incline downward

Inject water into air

Arrange drainage

pipe to U shape

Wrap drainage pipe and its

tion with

insulating pipe against

condensation

I

ndoor unit

Outdoor

Bending

S-shaped

against return

connection posi

 Concentrated construction of drainage pipe of

multiple indoor units in seat installation (pump
must be dismantled) shall be in accordance with
the following figure.

About 10cm as much as possible

above 1/100

6.2 Drainage test

 Guarantee smooth drainage pipe connection and

check whether each joint is sealed.

 Confirm by injecting water into air outlet. Inject

water into air outlet with jar or hose; pay attention
to slowly injecting until the drainage nozzle of
water pond has water flow.

 At the end of preparation work, power on terminal

board and immediately start discharge pump in
refrigerating mode.

 Check the drainage condition of discharge pump

after operating for a few minutes.

 In seat installation, the method of drainage test is

to directly inject water slowly from air outlet until
the water outlet of drainage pipe end has water
discharge and observe whether the middle has
seepage along the pipeline.

Drainage pipe

outlet

VRF Air-Conditioner IOM

7. Electric Connection

7.1 General

 Power off before implementing any electric

operation.

 All the purchased parts and materials as well as

electric operation must comply with the local laws
and regulations.

 All the connection operation must be implemented

by professional electrician.

 Line breaker or leakage breaker must be arranged

at power supply.

 Earthing resistance must below 4Ω.
 Air conditioner must be earthed reliably. Earthing

wire shall not be connected to gas pipe, tap water
pipe, lightening rod or telephone line.

 Do not power on before the end of all the electric

operation.

 The terminal of the same power supply shall not

be connected with two wires with different
diameters.

 Please use the power line with specified

specification, firmly connect and ensure terminal
free from external force drawing.

 Terminal screw should not be too tight or too

loose. Too tight will damage the terminal and too
loose may lead to poor contact and cause excess
heating to trigger hazard.

7.2 Unit power distribution

 Please refer to the following figure for power

distribution of indoor unit and outdoor unit.

unit

 A set of independent cooling medium system shall

use an independent switch control; multiple
systems shall not use a switch control and partial
indoor unit in a system and indoor unit of other
system shall also not share a switch control.

6

VRF Air-Conditioner IOM

7.3 Connection of indoor unit power line

 The power supply connection for indoor unit is detailed in electric schematic diagram on electric control box.

 Wiring specification is RVV2X2.5+1.5.

7.4 Type setting

Type setting is detailed in the electric schematic diagram on the electric control box.

7.5 Communication wire connection

Outdoor unit

Note: Inlet and outlet lines (TB2 inlet and TB3 outlet) of indoor unit shall not be reversed,

the unit can't be started.

 Recommended model of communication wire is RVSP2X 0.75.

 "TB2 inlet" connects the communication wire from outdoor unit communication terminals (A and B) or from the

former indoor unit (TB3).

 Communication wire of "TB3 outlet" connects to the communication port of the next indoor unit (TB2 inlet).

 Inlet and outlet lines (TB2 inlet and TB3 outlet) of indoor unit shall not be reversed, otherwise, there will be fault

and the unit can't be started.

 Connect according to the diagram, do not allow A and B polarity connection error, otherwise, communication

failure or controller damage may be caused.

 In order to avoid signal interference, the communication wire must use shielding wire, and the shielding layer

shall be earthed.

 The communication wire exceeding the specific length may cause air conditioner out of service due to

communication problem: communication wire length ≤500m and total length ≤1000m.

otherwise

, there will be fault and

7.6 Install the controller

 Install the wire controller on the pre-reserved site on the wall.
 Carcassing for communication wiring should be ready before installation the controller. The recommended

7

communication line is RVSP2×0.75. Be sure to pull the wires through the PVC conduit.
Note: the communication wire and PVC conduit are the field supplied parts.

VRF Air-Conditioner IOM

7.7 Connect the wire controller and indoor unit

 Group control can be realized through the wire controller. One wire controller can connect to max 4 indoor

units.

 The indoor units in one group should be connected in one and same power supply to guarantee normal

initialization of wire controller when power on.

 Connection sketch of indoor unit and wire controller:

(a) When one wire controller connecting only one indoor unit: (refer to Fig. 13)
(b) When one wire controller connecting multi indoor units: (refer to Fig. 14)

Fig. 13

One wire controller connects to one indoor unit

Fig. 14

One wire controller connects to multi indoor units

8

YDEC IOM

YDEC IOM (0812)

-EN(1212)

NONE

9