innovair TC18C2DWB1 User manual

FAN COIL 
INSTALLATION MANUAL
TC18C2DWB1
TC24C2DWB1
TC37C2DWB1
TC48C2DWB1
TC60C2DWB1
©2015 Innovair Corporation. All Rights Reserved.
www.innovair.com

Installation
20 Installation
Installation
1.Precaution on Installation.........................................21
2.Vacuum Dry and Leakage Checking........................22
3.Additional Refrigerant Charge .................................24
4.Water Drainage..........................................................25
5.Insulation Work .........................................................28
6.Wiring.........................................................................29
7.Test Operation...........................................................30

Precaution on Installation
Installation 21
1. Precaution on Installation
1). Measure the necessary length of the connecting pipe, and make it by the following way.
a. Connect the indoor unit at first, then the outdoor unit.
Bend the tubing in proper way. Do not harm them.
Specially Notice the pipe length/height/dimension of each capacity.
Maximum pipe length
Model Max. Length Max. Elevation
12,000Btu/h 15m 8m
18,000Btu/h ~24,000Btu/h 30m 10m
30,000Btu/h ~60,000Btu/h 30m 20m
Piping sizes Model Liquid(mm) Gas(mm)
12,000Btu/h~18,000Btu/h 6.4 12.7
24,000Btu/h 9.5 15.9
36,000(48,000)(60,000)Btu/h 9.5 19
CAUTIONS
Daub the surfaces of the flare pipe and the joint nuts with frozen oil, and wrench it for 3~4 rounds
With hands before fasten the flare nuts.
Be sure to use two wrenches simultaneously when you connect or disconnect the pipes.
Pipe gauge Tightening torque Flare dimension A
Min (mm) Max Flare shape
6.4 15

16N.m
(153

163 kgf.cm) 8.3 8.7
9.5 25

26N.m
(255

265kgf.cm) 12.0 12.4
12.7 35

36N.m
(357

367kgf.cm) 15.4 15.8
15.9 45

47N.m
(459

480 kgf.cm) 18.6 19.1
19.1 65

67N.m
(663

684kgf.cm) 22.9 23.3
b. The stop value of the outdoor unit should beclosed absolutely (as original state). Every time you connect it, first loosen the nuts at the part
of stop value, then connect the flare pipe immediately (in 5 minutes). If the nuts have been loosened for a long time, dusts and other
impurities may enter the pipe system and may cause malfunction later. So please expel the air out of the pipe with refrigerant before
connection.
c. Expel the air after connecting the refrigerant pipe with the indoor unit and the outdoor unit. Then fasten the nuts at the repair-points.
2) Locate The Pipe
a. Drill a hole in the wall (suitable just for the size of the wall conduit), then set on the fittings such as the wall conduit and its cover.
b. Bind the connecting pipe and the cables together tightly with binding tapes. Do not let air in, which will cause water leakage by
condensation.
c. Pass the bound connecting pipe through the wall conduit from outside. Be careful of the pipe allocation to do no damage to the tubing.
3) Connect the pipes.
4) Then, open the stem of stop values of the outdoor unit to make the refrigerant pipe connecting the indoor unit with the outdoor unit in
fluent flow.
5) Be sure of no leakage by checking it with leak detector or soap water.
6) Cover the joint of the connecting pipe to the indoor unit with the soundproof / insulating sheath (fittings), and bind it well with the tapes to
prevent leakage.

Vacuum Dry and Leakage Checking MLCAC-UTSM-2010-06
22 Installation
2. Vacuum Dry and Leakage Checking
1) Vacuum Dry: use vacuum pump to change the moisture (liquid) into steam (gas) in the pipe and discharge it out of the pipe to make the
pipe dry. Under one atmospheric pressure, the boiling point of water(steam temperature) is 100 . Use vacuum pump to make the

pressure in the pipe near vacuum state, the boiling point of water falls relatively. When it falls under outdoor temperature, the moisture in
the pipe will be vaporized.
Necessary
vacuum
degree
2) Vacuum dry procedure
There are two methods of vacuum dry due to different construction environment: common vacuum dry, special vacuum dry.

. Common vacuum dry procedure
Vacuum dry (for the first time)---connect the all-purpose detector to the inlet of liquid pipe and gas pipe, and run the vacuum pump more
than two hours (the vacuum pump should be below -755mmHg)
If the pump can’t achieve below -755mmHg after pumping 2 hours, moisture or leakage point will still exist in the pipe. At this time, it
should be pumped 1 hour more.
If the pump can’t achieve -755mmHg after pumping 3 hours, please check if there are some leakage points.
Vacuum placement test: place 1 hour when it achieves -755mmHg, pass if the vacuum watch shows no rising. If it rises, it shows there’s
moisture or leakage point.
Vacuuming from liquid pipe and gas pipe at the same time.
Sketch map of common vacuum dry procedure.

Vacuum Dry and Leakage Checking
Installation 23
. Special vacuum dry procedure
This vacuum dry method is used in the following conditions:
There’s moisture when flushing the refrigerant pipe.
Rainwater may enter into the pipe.
Vacuum dry for the first time ······ 2h pumping
. Vacuum destroy for the second time ······ Fill nitrogen to 0.5Kgf/cm2
Because nitrogen is for drying gas, it has vacuum drying effect during vacuum destroy. But if the moisture is
too much, this method can’t dry thoroughly. So, please pay more attention to prevent water entering and
forming condensation water.
. Vacuum dry for the second time······1h pumping
Determinant: Pass if achieving below -755mmHg. If -755mmHg can’t be achieved in 2h, repeat procedure
and .

. Vacuum placing test ······ 1h
. Sketch map of special vacuum dry procedure

Additional Refrigerant Charge MLCAC-UTSM-2010-06
24 Installation
3. Additional Refrigerant Charge
Caution
a) Refrigerant cannot be charged until field wiring has been completed.
b) Refrigerant may only be charged after performing the leak test and the vacuum pumping.
c) When charging a system, care shall be taken that its maximum permissible charge is never exceeded,
in view of the danger of liquid hammer.
d) Charging with an unsuitable substance may cause explosions and accidents, so always ensure that the
appropriate refrigerant is charged.
e) Refrigerant containers shall be opened slowly.
f) Always use protective gloves and protect your eyes when charging refrigerant.
The outdoor unit is factory charged with refrigerant. Calculate the added refrigerant according to the
diameter and the length of the liquid side pipe of the outdoor unit/indoor unit.
For 12kBtu/h (outdoor unit throttle)
R(g) D(mm)
L(m) 6.4
Less than 5m (One-way) —
Added Refrigerant When
Over 5m(One-way) 15g/m×L
For 18, 24, 36, 48, 60kBtu/h (indoor unit throttle)
R(g)
D(mm)
L(m)
6.4 9.5 12.7
Less than 5m (One-way) — — —
Added Refrigerant When
Over 5m(One-way) 30g/m×(L-5) 65g/m×(L-5) 115g/m×(L-5)
Remark:
R (g): Additional refrigerant to be charged
L (m): The length of the refrigerant pipe (one-way)
D (mm): Liquid side piping diameter

Water Drainage
Installation 25
4. Water Drainage
4.1 Gradient and Supporting
1). Keep the drainpipe sloping downwards at a gradient of at least 1/50. Keep the drainpipe as short as possible and eliminate the air bubble.
2). The horizontal drainpipe should be short. When the pipe is too long, a prop stand must be installed to keep the gradient of 1/50 and
prevent bending. Refer to the following table for the specification of the prop stand.
Diameter Distance between the prop stands
Hard PVC pipe 25~40mm 1.5~2m
3). Precautions
The diameter of drainpipe should meet the drainage requirement at least.

the drainpipe sho

uld be heat-insulated to prevent atomization.
Drainpipe should beinstalled before installing indoor unit.After powering on, there is some

water in water-receiver plate. Please check if the
drain pump can operate correctly.
All connection should be firm.
Wipe color on PVC pipe to note connection.
Climbing, horizontal and bending conditions are prohibited.
The dimension of drainpipe can’t less than the connecting dimension of indoor drainpipe.

Heat

-insulation should be done well to prevent condensation.
Indoor units with different drainage type can’t share one convergent drainpipe.

4.2 Drainpipe Trap
1). If the pressure at the connection of the drainpipe is negative, it needs to design drainpipe trap.
2). Every indoor unit needs one drainpipe trap.
3). A plug should be designed to do cleaning.

50cm 50cm
4.3 Upwards drainage (drain pump)
For Four-way cassette(compact)

Water Drainage
26 Installation
For Four-way cassette
4.4 Convergent drainage
1). The number of indoor units should be as small as possible to prevent the traverse main pipe overlong.
2). Indoor unit with drain pump and indoor unit without drain pump should be in different drainage system.
3). Selecting the diameter
Number of connecting indoor units Calculate drainage volume Select the diameter
Calculate allowed volume =Total cooling capacity of indoor units (HP)×2 (l/ hr)
Allowed volume(lean 1/50) (l/ hr) I.D. (mm) Thick
Hard PVC 14


25 3.0
Hard PVC 14

88


30 3.5
Hard PVC 88

334


40 4.0
Hard PVC 175

334


50 4.5
Hard PVC 334



80 6.0
4.5 Drainage test
1). Drainage without drain pump
After finishing drainpipe installation, pour some water into the water receiver plate to check if the water flows smoothly.
2). Drainage with drain pump
Poke the Water Level Switch, remove the cover, use water pipe to pour 2000ml water into the water receipt plate through the water

inlet.
Turn on the power to Cooling operation. Check the pump’s operation and switch on the Water Level Switc

h. Check the pump’s sound
and look into the transparent hard pipe in the outlet at the same time to check if the water can discharge normally.

Water Drainage
Installation 27
Stop the air conditioner running, turn off the power, and put back the cover.

Stop the air conditioner. After 3 minutes, check if it has abnormity. If the collocation of drainpipes is illogical, the water will flow back
overfull, which will cause the alarm lamp flashes, even overflow from the water receipt plate.
Keep on pouring water until it gives an alarm signal for high water level, check if the pump drains water at once. If the water level can’t fall
below the alarmed water level after 3 minutes, the air conditioner will stop. Turn off the power and drain the remained water, and then turn
on the air conditioner.
Note: the drain stuff in the main water receipt plate is for maintenance. Stuff up the drain stuff to prevent water leakage.

Insulation Work MLCAC-UTSM-2010-06
28 Installation
5. Insulation Work
5.1 Insulation material and thickness
1). Insulation material
Insulation material should adopt the material which is able to endure the pipe’s temperature: no less than 70 in the high

-pressure side, no
less than 120 in the low

-pressure side(For the cooling type machine, no requirements at the low-pressure side.)
Example: Heat pump type----Heat-resistant Polyethylene foam (withstand above 120 )

Cooling only type---- Polyethylene foam (withstand above 100 )

2). Thickness choice for insulation material
Insulation material thickness is as follows:
Pipe diameter (mm) Adiabatic material thickness
6.4—25.4 10mm
Refrigerant pipe 28.6—38.1 15mm
Drainage pipe Inner diameter20—32 6mm
5.2 Refrigerant pipe insulation
1). Work Procedure
Before laying the pipes, the non

-jointing parts and non-connection parts should be heat insulated.
When the gas proof test

is eligible, the jointing area, expanding area and the flange area should be heat insulated
2). Insulation for non-jointing parts and non-connection parts
wrong right
Gas pipe and liquid pipe should
not be put together to insulate Insulate the gas pipe (cooling only) Insulate the gas pipe and liquid pipe

Insulation Work
Installation 29
For construction convenience, before laying pipes, use insulation material to insulate the pipes to be deal with, at the same time, at two ends
of the pipe, remain some length not to be insulated, in order to be welded and check the leakage after laying the pipes.
3). Insulate for the jointing area, expanding area and the flange area
Insulate for the jointing area, expanding area and the flange area should be done after checking leakage of the pipe

s
Make sure there’s no clearance in the joining part of the accessorial insulation material and local preparative insulation material.

5.3 Drainage pipe insulation
1) The connection part should be insulated, or else water will be condensing at the non-insulation part.
5.4 Note
1) The jointing area, expanding area and the flange area should be heat insulated after passing the pressure test
2) The gas and liquid pipe should be heat insulated individually, the connecting part should be heat insulated individually.
3) Use the attached heat-insulation material to insulate the pipe connections (pipes’ tie-in ,expand nut ) of the indoor unit.
6. Wiring
Please refer to the Wiring Diagram.

Test Operation
30 Installation
7. Test Operation
(1) The test operation must be carried out after the entire installation has been completed.
(2) Please confirm the following points before the test operation.
The indoor unit and outdoor unit are installed properly.
Tubing and wiring are correctly completed.
The refrigerant pipe system is leakage-checked.
The drainage is unimpeded.
The ground wiring is connected correctly.
The length of the tubing and the added stow capacity of the refrigerant have been recorded.
The power voltage fits the rated voltage of the air conditioner.
There is no obstacle at the outlet and inlet of the outdoor and indoor units.
The gas-side and liquid-side stop values are both opened.
The air conditioner is pre-heated by turning on the power.
(3) According to the user's requirement, install the remote controller when the remote controller's
signal can reach the indoor unit smoothly.
(4) Test operation
Set the air conditioner under the mode of "COOLING" with the remote controller, and check the following
points.
Indoor unit
Whether the switch on the remote controller works well.
Whether the buttons on the remote controller works well.
Whether the air flow louver moves normally.
Whether the room temperature is adjusted well.
Whether the indicator lights normally.
Whether the temporary buttons works well.
Whether the drainage is normal.
Whether there is vibration or abnormal noise during operation.
Outdoor unit
Whether there is vibration or abnormal noise during operation.
Whether the generated wind, noise, or condensed of by the air conditioner have influenced your
neighborhood.
Whether any of the refrigerant is leaked.