Mitsubishi Heavy Industries FDT125VNPWVH Data Book page 46

⑧Drain pipe (continued)
4. Insulate the drain pipe.
● Be sure to insulate the drain socket and rigid PVC pipe installed indoors otherwise it may
cause dew condensation and water leakage.
※ After drainage test implementation, cover the drain socket part with pipe cover (small size),
then use the pipe cover (big size) to cover the pipe cover (small size), clamps and part of
the drain hose, and fix and wrap it with tapes to wrap and make joint part gapless.
Drain up
● The position for drain pipe outlet can be raised up to 600mm above the ceiling. Use elbows
for installation to avoid obstacles inside ceiling. If the horizontal drain pipe is too long before
vertical pipe, the backflow of water will increase when the unit is stopped, and it may cause
overflow of water from the drain pan on the indoor unit. In order to avoid overflow, keep the
horizontal pipe length and offset of the pipe within the limit shown in the figure below.
295-325
Otherwise, the construction point makes it same as drain pipe construction.
Drain test
1. Conduct a drain test after completion of the electrical work.
2. During the trail, make sure that drain flows properly through the piping and that no water
leaks from connections.
3. In case of a new building, conduct the test before it is furnished with the ceiling.
4. Be sure to conduct this test even when the unit is installed in the heating season.
Procedures
1. Supply about 2000 cc of water to the unit through the air outlet by using a feed water pump.
2. Check the drain while cooling operation.
Insert water supply hose
for 20mm - 30mm to
supply water.
(Insert hose facing
toward bottom.)
Drain situation can be checked with transparent socket.
If the electrical work has not been completed, connect a convex
Remove grommet joint in the drain pipe connection to provide a water inlet.
Make sure to Install Then, check if water leaks from the piping system and that
it back after test.
drain flows through the drain pipe normally.
Outline of bottom drain piping work
● If the bottom drain piping can be done with a
descending gradient (1/50-1/100), it is possible to
connect the pipes as shown in the drawing below.
Connecting port of bottom drain pipes
Rubber stopper (to be removed)
Uncoupling the drain motor connector
● Uncouple the connector CnR for the drain motor as
illustrated in the drawing on the right.
(
Note: If the unit is run with the connector coupled,
drain water will be discharged from the upper
drain pipe joint, causing a water leak.
⑨Wiring-out position and wiring connection
● Electrical installation work must be performed according to the installation manual by an
electrical installation service provider qualified by a power provider of the country, and be
executed according to the technical standards and other regulations applicable to electrical
installation in the country.
Be sure to use an exclusive circuit.
● Use specified cord, fasten the wiring to the terminal securely, and hold the cord securely in
order not to apply unexpected stress on the terminal.
● Do not put both power source line and signal line on the same route. It may cause miscom-
munication and malfunction.
● Be sure to do D type earth work.
● For the details of electrical wiring work, see attached instruction manual for electrical wiring work.
1. Remove a lid of the control box (2 screws).
2. Hold each wiring inside the unit and fasten them to terminal block securely.
3. Fix the wiring with clamps.
4. Install the removed parts back to original place.
Remote control line
Indoor - Outdoor connecting line
Single unit wiring connection
100 or less
Attached drain hose clamp
Pour water into a convex joint
Drain
Main
piping
unit
Connecting port of top drain pipe
Standard hard polyvinyl
chloride pipes
Transparent soft tube
(Outside diameter:20mm)
(Prepare on site)
Insulating material
P.C. board
)
Main fuse
* Earth
⑨Wiring-out position and wiring connection (continued)
Signal line
Remote control line
Main fuse specification
Model
Specification
FDU FDU-F
45-90 650 T 5A L 250V
112-160 1100 T 6.3A L 250V
⑩External static pressure setting
You can set External Static Pressure (E.S.P.) by method of MANUAL SETTING on remote control.
Indoor unit will control fan-speed to keep rated air flow volume at each fan speed setting (Lo-P-Hi)
You can set required E.S.P. by wired remote control that calculated with the set air flow rate and
pressure loss of the duct connected.
● How to set E.S.P. by wired remote control
① Push "◆" marked button(E.S.P. button).
② Select indoor unit No. by using
③ Select setting No. by using
set E.S.P. by button.
See detailed procedure in technical manual.
Notice
You can not set E.S.P. by wireless remote control.
With E.S.P. setting, confirm that actual E.S.P. agrees with E.S.P. setting.
When E.S.P. setting is higher than actual E.S.P., the air flow rate becomes excessively higher.
This will cause water leakage if water splashes.
When E.S.P. setting is lower than actual E.S.P ., the air flow rate becomes excessively lower and
the cooling or heating may become ineffective.
In order to reduce the risk above the factory E.S.P. setting is set within the range of 80 – 150 Pa
(E.S.P. setting No. 8 – 15). Be sure to use within the range of 80 – 150 Pa in actual operations. If
actual E.S.P. is lower than 80 Pa, it may cause water leakage.
Setting No.
8 9 10 11 12
E.S.P (Pa)
80 90 100 110 120
※
If 1 – 7 is selected for the setting No. on the remote control, the setting No. shows No. 8.
If 16 – 20 is selected for the setting No. on the remote control, the setting No. shows No. 15.
Factory default is No. 8.
The Case of FDU-F
Setting No.
1 2 3 4 5
E.S.P. (Pa)
10 20 30 40 50
※
If 13-20 is selected for the setting No. on the remote control, the setting No. shows No. 12.
※
Factory default is No. 8.
SW8-4
If SW8-4 is turned to "ON", E.S.P. setting range can be changed to 10 – 200 Pa (E.S.P. setting No.
1 – 19). This should not be used when actual E.S.P. cannot be confirmed, because the risk above
becomes higher.
Setting No.
1 2 3 4 5
E.S.P. (Pa)
10 20 30 40 50
※
If 20 is selected for the setting No. on the remote control, the setting No. shows No. 19.
⑪Check list after installation
●Check the following items after all installation work completed.
Check if
The indoor and outdoor units are fixed securely?
Inspection for leakage is done?
Insulation work is properly done?
Water is drained properly?
Power source voltage is same as mentioned in the model name plate?
No mis-wiring or mis-connection of piping?
Earth wiring is connected properly?
Cable size comply with specified size?
Any obstacle blocks air flow on air inlet and outlet?
Is setting of E.S.P finished?
- 45 -
'22 • PAC-DB-409
Main fuse
Power source line
* Earth
Multi unit wiring connection
* Please fix the wiring in the band not to move even if it pulls.
Part No.
SSA564A149AH
SSA564A149AJ
button.
button and
E E S . S . P . P . b . b . t t u t t u n o n o
13 14 15
130 140 150
6 7 8 9 10 11 12
60 70 80 90 100 110 120
SW8-4:OFF (E.S.P. setting No. 8-15)
SW8-4:ON (E.S.P. setting No. 1-19)
6 7 8 9 10 11 12 13 14 15 16
60 70 80 90 100 110 120 130 140 150 160
Expected trouble
Falling, vibration, noise
Insufficient capacity
Water leakage
Water leakage
PCB burnt out, not working at all
PCB burnt out, not working at all
Electric shock
PCB burnt out, not working at all
Insufficient capacity
Excessive air flow, water drop blow out
17 18 19
170 180 200
Check