Daikin KEH041A41 User manual

• Request the dealer or an authorized technician to install the product.
Improper installation of the product could result in water leakage, an electrical shock, or fire.
• Inform customers that they should store this Installation Manual for future reference.
• After completing the installation, make sure that the unit operates properly during the startup operation.
• All phases of the field-installation, including, but not limited to, electrical, piping, and safety, must be done in accordance with manufacturer’s
instructions and must comply with national, state, provincial, and local codes.
• This product is a heater designed to melt snow that is blown into the product from the outside to prevent the drain pan of the outdoor unit from
freezing.
• Install the product with a snow-break hood on a high stand if this product is used in heavy snow areas.
• The product must be installed according to the instructions given in this manual.
The Incomplete installation of the product could result in water leakage, an electrical shock, or fire.
• Use the supplied or specified installation parts.
Use of other parts could result in the unit becoming loose and falling, water leakage, electrical shocks, or fire.
• Turn OFF the power supply at the time of installation.
Touching any electrical parts may with the power supply turned on could result in electrical shocks.
• Use specified wires. Connect and fix the wires so that the wires will not put improper force on the terminal junctions.
Wires connected or fixed improperly could result in terminal overheating, an electrical shock, or fire.
• When wiring and connecting the indoor and outdoor units, carefully arrange the wiring so that they will not put improper
force on the structures.
Install covers over the wires. Incomplete cover installation could result in terminal overheating, an electrical shock, or fire.
• Wear protective gloves at the time of installation.
Touching the suction mouth or aluminum fin of the outdoor unit may result in injury.
• Do not install the product in places where there is danger of exposure to inflammable gas leakage.
If the gas leaks and builds up around the unit, it may catch fire.
• Do not grab the top plate of the outdoor unit carelessly when removing the top plate.
The sharp edge of the top plate may cause injury.
• Do not install the outdoor unit in places where small animals may nest in the outdoor unit.
If small animals intrude and touch the internal parts of the outdoor unit, the outdoor unit may malfunction, generate smoke, or ignite.
Advise the user to keep the place clean.
• Do not touch the heater unit with bare hands.
The temperature of the heater unit will become high when the heater is turned on.
Touching the heater unit with bare hands may result in burns or injury.
WARNING
CAUTION
• Do not touch the heater unit without wearing gloves.
The temperature of the heater unit will become high when the heater is turned on.
Touching the heater unit with bare hands will result in burns or injury.
DANGER
Read these SAFETY CONSIDERATIONS carefully before installing the drain pan heater. After completing the installation, check if the unit operates
properly during the start-up operation.
Meaning of DANGER, WARNING and CAUTION symbols.
2P326981-1 M12B191
Safety Considerations for Installation of Drain Pan Heater
DRAIN PAN HEATER
Two-dimensional bar code
is a code for manufacturing.
MODELS: KEH041A41, KEH041A45, KEH041A46
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury. It
may also be used to alert against
unsafe practices.
DANGER
WARNING
CAUTION

KEH041A45 KEH041A46KEH041A41
111
336
2
223
11
2
KEH041A45 KEH041A46KEH041A41
111
111
111
1
1
1
1. Remove each component of the
outdoor unit.
1) Remove the stop valve cover.
• Affix J information label near the
manufacture’s label. *I
2) Remove the service lid.
3) Remove the top plate.
4) Remove the anti-drip cover, if included.
5) Remove the front plate.
• Affix H electric wiring diagram label
where there is enough space available
on the back of the front plate. *II
• Be sure to check that the power supply of the product is turned off.
WARNING
Drain pan
heater
A
Piercing
screw
B
M4 self-
tapping screw
C
Binding band
D
Sealing material (long)
E
Sealing
material
(square)
F
Installation
manual
G
Electric wiring
diagram label
H
Information
label
J
Fixing plate
K
Sub
installation
manual
L
• The appearance of the outdoor unit
and the number of screws may differ
from some models.
J
H
Number and type of
screws to be removed
Parts name
Stop valve cover
Service lid
Top plate
Anti-drip cover
Front plate
1
2
3
–
8
*1
*1
*2
–
*2
1
2
2
–
7
*1
*2
*2
–
*2
1
2
3
–
5
*1
*2
*2
–
*2
KEH041A41 KEH041A45 KEH041A46
Appearance of A drain pan heater and K fixing
plate may differ from some models.
A K
Top plate Anti-drip cover
Front plate
Stop valve
cover
H Electric wiring
diagram label *II
J Information
label *I
Accessories
Tools Required for Installation
Installation Procedure (1)
*1 Truss head
tapping screw.
*2 Hexagon
tapping screw.
Service lid
The outdoor units RXS09/12DVJU have different structures from other models.
For the removal of each component, refer to L sub installation manual.
L
• Electric drill
• ø1/8” (ø3.2mm) drill
• ø5/32” (ø4mm) drill
• Phillips screwdriver
• Nippers

A
C
B
3. Installation of the drain pan heater.
• When drilling a hole, be careful not to damage the soundproofing material and other components on the
back side.
CAUTION
2. Remove the fan motor base.
1) Remove the fixing screw at the lower
section of the fan motor base, and remove the fan motor base together with the propeller fan.
See Fig.1.
• Do not remove the fan motor harness.
• Be careful so that the fan motor harness does not come into contact with the edges of the heat
exchanger or other components.
• Place the removed fan motor base so that stress is not applied on the propeller fan.
• Make the ground plate closely adhere to the partition.
• Install the drain pan heater in a position where it does not come into contact with the fan motor base.
1) To fix the drain pan heater, drill ø1/8” (ø3.2mm) holes in the bottom frame and the partition plate.
(Refer to Installation Procedure (3) for the parts for drilling and the number of holes.)
• Place the actual components to ensure positioning is correct before drilling holes.
• The hole can be made with the included piercing-screw as well.
2) Install the drain pan heater.
• Insert the plate under the heat exchanger.
• For KEH041A41 and KEH041A46 , place K fixing plate.
3) Fix the drain pan heater with B piercing screw.
• For KEH041A41 , use C M4 self-tapping screw to fix K fixing plate.
KEH041A41
KEH041A41
KEH041A46 K
B
C K
Screw *3
Fig. 1
Truss head tapping screw.
KEH041A41 KEH041A45
Hexagon tapping screw.
KEH041A46
*3 Screw type
Appearance of the outdoor unit
may differ from some models.
KEH041A41
KEH041A41
KEH041A45
KEH041A45
KEH041A46
The lugs of the fan
motor base are
hooked on the heat
exchanger.
View A
The fan motor
harness is fitted in
the groove of the
partition plate.
The fan motor
harness is routed in
the groove as shown
in the figure.
Condition of fan motor harness
installation
Groove
View B
View C
Installation Procedure (2)
The outdoor units RXS09/12DVJU have different structures from other models.
For the removal of fan motor base, refer to L sub installation manual.
L

D
D
D
D
KEH041A41
KEH041A45
KEH041A46
Parts for drilling and
number of ø1/8”
(ø3.2mm) holes
Bottom frame 1
Partition plate 2
Total 3
Parts for drilling and
number of ø1/8”
(ø3.2mm) holes
Bottom frame 4
Partition plate 2
Total 6
Parts for drilling and
number of ø1/8”
(ø3.2mm) holes
Bottom frame 3
Partition plate 2
Total 5
1-row heat exchanger
2-row heat exchanger
Partition
plate
Ground plate:
Make the ground plate closely
adhere to the partition.
Hole
B Piercing
screw
View D
Partition
plate
Ground plate:
Make the ground plate closely
adhere to the partition.
Hole
B Piercing
screw
View D
Partition
plate
Ground plate:
Make the ground plate closely
adhere to the partition.
Hole
B Piercing
screw
B Piercing
screw
View D
Heat exchanger
Heat exchanger
Heat exchanger
Hole:
Use C M4 self-tapping screw
to fix K fixing plate.
C
K
Plate:
Insert the plates
under the heat
exchanger.
Hole:
Fix with
B piercing screw.
B
Hole:
Fix with
B piercing screw.
B
K Fixing plate
K Fixing plate
Heat exchanger
Plate:
Insert the plate under
the heat exchanger.
K Fixing plate
Plate:
Insert the plate under
the heat exchanger.
Hole:
Fix with B piercing screw.
B
Installation Procedure (3)

E
F
1) Drill ø5/32” (ø4mm) holes in the partition plate for installing the snap band. (3 locations)
2) Remove the sealing material from the partition plate.
• Dispose of the removed sealing material.
3) Insert the snap band into the drilled hole.
4) Affix F sealing materials (square) at 2 positions to protect the harness.
5)
Place the harness on the F sealing materials (square) and affix the E sealing material (long) to fix it.
F
F E
KEH041A41
KEH041A41
Installation Procedure (4)
4. Route the harnesses.
• When drilling a hole, be careful not to damage the soundproofing
material and other components on the back side.
• When drilling a hole in the partition plate, be careful not to let
chippings drop on the electrical components (particularly the reactor).
Operating the unit with chippings attached on the reactor may cause
electrical shock or fire.
WARNING
Reactor
F Sealing material
(square)
E Sealing material
(long)
F Sealing material (square):
Attached to the tip of the screw.
View F
View E
Type A Type B
HoleHole
Hole
Hole:
Drill a hole in alignment with the
actual component and at a
position where the harness will
not become loose or too tense.
Snap band Tip of
the
screw
Tip of
the
screw

Installation Procedure (5)
1) Drill ø5/32” (ø4mm) holes in the partition plate for installing the snap band. (2 locations)
2) Insert the snap band into the drilled hole.
3) Place the harness as shown in the figure and affix the E sealing material (long) to fix it.
KEH041A45
1) Drill ø5/32” (ø4mm) holes in the partition plate for installing the snap band. (1 location)
2) Insert the snap band into the drilled hole.
3) Install the fan motor base.
• Hook the harness of the fan motor base on the hook of the electrical parts box.
4) Hook the harness of the drain pan heater on the hook of the electrical parts box to fix it.
5) Bind the harnesses and the thermostat with the D binding band. (3 locations)
• Cut the tip of binding band.
KEH041A46
E
D
E Sealing material
(long)
Hole:
Drill a hole in alignment
with the actual component
and at a position where the
harness will not become
loose or too tense.
Hole
Snap band
Snap band
Hook
Hook
Fan motor
harness
Thermostat
Hole:
Drill a hole in alignment
with the actual component
and at a position where the
harness will not become
loose or too tense.
D Binding band

Installation Procedure (6)
H
J
K
5. Connect the FastOn terminals of the drain pan heater to the terminal block of the outdoor
unit.
1) Remove the terminal block. (1 screw *4) *4 Pan head tapping screw
• KEH041A41 and KEH041A45 only.
2) Connect the thermostat-side terminal (black harness) to the leftmost terminal and the heater-side
terminal (white harness) to the second leftmost terminal.
3) Bind the harnesses with the D binding band. (2 locations)
• KEH041A41 and KEH041A45 only.
• Cut the tip of D binding band.
6. Install each component to the original position.
• Be careful not to confuse screw types. See “Installation Procedure (1), (2)”.
D
D
KEH041A41
KEH041A41
KEH041A45
KEH041A41 KEH041A45
1) Install the terminal block.
• Secure the terminal block so that it does
not lift up.
2) Install the fan motor base.
• KEH041A41 and KEH041A45 only.
3) Install the front plate.
4) Install the anti-drip cover, if provided.
5) Install the top plate.
KEH041A41 KEH041A45
KEH041A45
KEH041A46
Thermostat-
side terminal
(black harness)
Heater-side terminal
(white harness)
Heater-side
terminal
(white harness)
Heater-side
terminal
(white harness)
Thermostat-
side terminal
(black harness)
Thermostat-
side terminal
(black harness)
Screw
Screw
D Binding band
View H
View J
View K
(In the case of installation to RXS09/12DVJU)
Put the
harness
through the
wire clip.
D Binding band
D Binding band

1 2 3
Ground terminal
1 terminal1
2 terminal
2
Screw of the front grille
1. Check the following before powering on the unit.
1) Check whether the drain pan heater has been properly
installed, wiring has been properly performed, and the
removed components have been returned to the
original positions.
2) Check the insulation resistance of the drain pan
heater.
• Use the tester (500 VDC) to check that the insulation
resistance between 1 terminal and the ground
terminal and between 2 terminal and the ground
terminal is equal to or higher than 1MΩ.
3) Check the continuity of the outdoor unit.
If the outdoor unit is RXS09/12DVJU, a continuity test
is not necessary.
• Use the tester to check that the continuity between
the screw on the front grille and the ground terminal
reads 0Ω.
• When there is no continuity, retighten the screws
securing the front plate and the bottom frame to
increase the area of contact with the screw. Then,
carry out the continuity test again.
2. Check the following after powering on the unit.
• Turn on the power supply and check that the temperature
of the drain pan heater will rise.
• Touch the bottom of the outdoor unit by hand and
check the temperature rise.
• If the outdoor temperature is high, the heater will not
be energized which is not a failure.
(Operation of thermo sensor: Turned on at 23˚F
(–5˚C) and off at 34˚F(1˚C).)
3. Install the remaining components to the original
positions.
• Be careful not to confuse screw types.
See Installation Procedure (1).
1) Install the service lid.
2) Install the stop valve cover.
• The drain pan heater is hot; do not touch it with bare hands.
CAUTION
1
2
Appearance of the outdoor
unit may differ from some
models.
2P326981-1
Installation Check (electrical test of the outdoor unit)