Alfa Network Optigo CC User manual

ORIGINAL INSTRUCTIONS
AHE00047EN 2001
IM100536EN-01
Optigo CC
Instruction manual
• Product description
• Product labels
• Unpacking & lifting
• Installation
• Maintenance
• Spare parts

AHE00047EN 2001
2
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Index
1. Important information
1.1 Disclaimer...................................................................................................................................3
1.2 Intended use...............................................................................................................................3
1.3 Where to nd product information ..............................................................................................3
2. Product description
2.1 General information and application...........................................................................................4
2.2 Standard conguration ...............................................................................................................4
2.3 Options.......................................................................................................................................5
2.4 Code description ........................................................................................................................5
3. Product labels...........................................................................................................................6
4. Unpacking and lifting...............................................................................................................8
4.1 Unpacking ..................................................................................................................................8
4.2 Lifting..........................................................................................................................................9
5. Installation
5.1 Mounting dimensions ...............................................................................................................11
5.2 Mounting bracket......................................................................................................................12
5.3 Technical spaces......................................................................................................................12
5.4 Refrigerant connections ...........................................................................................................12
5.5 Hotgas connection (optional)....................................................................................................13
5.6 Drain line ..................................................................................................................................13
5.7 Electrical connections...............................................................................................................14
5.8 Electric defrost capacities.........................................................................................................22
6. Maintenance
6.1 Fan replacement ......................................................................................................................24
6.2 Driptray.....................................................................................................................................24
6.3 Side covers...............................................................................................................................24
6.4 Coil heater elements replacement............................................................................................25
6.5 Driptray heater elements replacement .....................................................................................25
6.6 Bottom plate (CC500)...............................................................................................................26
7. Spare parts..............................................................................................................................27

AHE00047EN 2001
3
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
1 Important information
1.1 Disclaimer
This Instruction Manual applies to all Optigo CC air cooler products and is supplied in combina-
tion with the Air Cooler Product Manual AHE00042. Both manuals must be carefully examined and
instructions should be followed up at all times. Alfa LU-VE does not accept liability for any damage
resulting from non-compliance to the instructions as given in the manuals and order-related docu-
ments.
1.2 Intended use
Air coolers are partly completed machinery according to Machine Directive 2006/42/EC and are
intended for incorporation in cooling systems. Declarations of Incorporation are available on
alfa.luvegroup.com. The units may not be put into operation until the conformity of the complete
machine or cooling system has been declared according to the following standards and directives:
• Pressure Equipment Directive 2014/68/EU
• Machine Directive 2006/42/EC
• Low Voltage Directive 2014/35/EU
• Electrical Equipment of Machines IEC 60204-1
• Electro Magnetic Compatibility 2014/30/EU
• Any applicable local or national legislation
1.3 Where to find product information
Detailed technical data for individual product models are available in order related documents,
on the product label and in product data sheets. Comprehensive technical information for all Alfa
LU-VE air heat exchanger products is available on-line on alfa.luvegroup.com. This includes:
• Product manuals
• Instruction manuals
• Product leaflets & brochures
• Product data sheets (selection software)
• Dimensional drawings
• Electrical wiring diagrams
• Certificates
Alfa LU-VE offers world-wide service and support. In case of any questions or uncertainty please
contact your local Alfa LU-VE representative.
Contact addresses are available at alfa.luvegroup.com.
Optigo CC

AHE00047EN 2001
4
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
2 Product description
2.1 General information and application
Optigo CC are commercial single discharge unit coolers for general application in small to medium-
sized cooling, freezing and working rooms. Coolers are available in draw-through (CC) and blow-
through design (CCB). A wide range of models make them especially suitable for refrigerated work-
ing, processing and storage rooms. Dedicated ranges for HFO/HFC refrigerants (E), brine (W) and
CO2(X). A selection of Optigo CC coolers is available from stock.
• Refrigerants: HFO/HFC DX (E), CO2DX (X) and brine (W).
• Room temperatures: +10 to -30 °C.
• Capacity range (SC2): 1 up to 55 kW.
• Air volumes: 770 up to 30000 m3/h.
Model Refrigerant Design pressure Test pressure
CC(B) E HFO/HFC 40 bar 57 bar
CC X CO280 bar 114 bar
CC(B) W Brine 10 bar 14.3 bar
2.2 Standard configuration
•Internally grooved Cu tubes and aluminium fins, smooth tubing for brine
applications and dedicated thicker tubes for CO2application. Tube pitch is
staggered. All HFO/HFC DX models fitted with a T-connection to improve
the refrigerant distribution and for hotgas defrost in coil.
•Optigo CC coolers are available with 1 to 4 fans fitted with AC or EC fan
motors in two fan speed executions (noise levels) H/L. Fan diameters 250,
300, 350, 400 or 500 mm drawing or blowing through the coil. Integrated
thermo contacts (Clixon) standard for 3-phase AC motors. All single phase
motors protected by an integrated internal overload switch. Electronically integrated overload
protection for EC fan motors.
•All casing parts made of durable sheet metal, epoxy coated RAL 9002. Top plate corrosion
resistant Magnelis®.
•All models fitted with hinged side panels and aluminium driptray. Driptray is adjustable for perfect
leveling. Removable internal driptray for inspection and cleaning.
•Hinged side panels and driptray, drain(s) 1½" BSP external
•Fitted with schräder valve on the suction connection for testing purposes.
•Sufficient room for fitting the expansion valve inside.
•Stickers indicate fan direction and refrigerant in/out.
•Optigo CC251-403 models are delivered in wooden folding boxes, CC404-504 and CCB models
in wooden crates. All packings suitable for safe stacking.

AHE00047EN 2001
5
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
2.3 Options
• Electric defrost
For cold rooms with room temperatures below 4 °C and where frost build-up is likely, the appli-
cation of a defrosting system is advised. Electric defrost for Optigo CC consists of stainless steel
heater elements. The defrost elements are connected to separate terminals in the terminal box.
Available defrost systems are:
- Electric defrost in coil (standard E, heavy E2)
- Electric defrost in driptray (HD)
- Hotgas defrost in driptray (HG)
- Electric defrost in driptray & hotgas in coil
• Driptray insulation 12 mm + cladding (IS)
• Shut-up sock (S)
• Airsock adapter ring (SR)
Available for CC400 and CC500 draw-through models only.
• Coil protection
- Pre-coated aluminium fins (EP)
- Cataphoresis treatment (CA)
• Stainless steel casing and frame (SS)
• Fan ring heater (FRH)
• Re-heating coil (RH)
• Switch on/off (SW)
• Fan motors wired to connection box (CB)
2.4 Code description
CC B E H E 50 1 .2 A S * CR SS E * EP 7.0 CU IS
1234567891011 12 13 14 15 16 17 18 19
1
2
3
4
5
6
7
8
9
Commercial unit cooler
Air direction (default=draw-through, B=blow-through)
Refrigerant system (E= HFO/HFC DX, X=CO2DX, W=brine)
Fan speed (H=high speed, L=low speed)
Fan motor type (blank=AC, E=EC)
Fan diameter (25=250, 30=300, 35=350, 40=400, 50=500 mm)
Number of fans (1 to 4)
CC version
Tube rows code (A, B, C)
10 No. of phases (S=1, T=3)
11 No. of circuits
12 Packing (BO=box, CR=crate)
13 Casing material (PC=powder coated, SS= stainless steel)
14 Defrost system (A=air defrost, E=electric defrost, HG=hotgas, HG+E= hotgas + electric
defrost in driptray)
15 Electrical options
16 Fin material (AL=aluminium, EP=epoxy coated aluminium, CA=cataphoresis)
17 Fin spacing (4, 5.5, 7, 10, 12 mm)
18 Tube material (CU=copper)
19 Options

AHE00047EN 2001
6
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
3 Product labels
⑧③
②
①
⑨
⑧
⑥⑦
⑤
④
WARNING
READ INSTRUCTION MANUAL BEFORE
INSTALLATIONS OPERATIONS AND MAINTENANCE
TO AVOID INJURIES OR DAMAGE
Country of origin Italy
Manufacturer: Manuf. Date:
AIR HEX ALONTE S.R.L. - Italy 04 / 2019
Model: O.A. 1100186
CCEH502.2BD 400V CR PCE
CA 5.5 CU
Item ID: 3289208322
Serial no. AP 2003621
Unit Net Weight: 190 Kg ±5%
Sn
Motorfan data:
Vn: 3~400V
f: 50 Hz
EXAMPLE
WARNING
READ INSTRUCTION MANUAL BEFORE
INSTALLATIONS OPERATIONS AND MAINTENANCE
TO AVOID INJURIES OR DAMAGE
Manufacturer: Manuf. date:
AIR HEX ALONTE S.R.L. - Italy 04 / 2019
Model: O.A. 1100186
CCEH502.2BD 400V CR PCE
CA 5.5 CU
Item ID: 3289208322
Serial no. AP 2003621
Sn
Coil PED data: I
Max DN: 38 mm
Fluid Group 2
Coil Ts: +125/-60 °C
Ps: 40 bar
Pt: 57 bar
Test Date: 04-2019
EXAMPLE
1. Product label
Model Refer to paragraph "Code
description"
Item ID
Serial no.
Communicate these when
ordering spare parts as
they identify the unit.
O.A. Order Acknowledgement
number
Unit Net Weight Check before any lifting
operation to ensure that
proper lifting tools are used
2. Product label - coil
Model Refer to paragraph "Code
description"
Item ID
Serial no.
Communicate these when
ordering spare parts as
they identify the unit.
Max DN Maximum diameter of the
distributor tube
Fluid Group According to PED
Coil Ts Range of operating tem-
peratures for the coil
Ps Design pressure
Pt Test pressure
Test date Date on which the coil has
been pressure tested in
the factory

AHE00047EN 2001
7
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
5.307
ATTENZIONE!
CIRCUITO FRIGORIFERO PRECARICATO CON AZOTO
WARNING!
PRECHARGED REFRIGERANT CIRCUIT WITH NITROGEN
ACHTUNG!
VERLADTER KÄLTEMITTELKREISLAUF MIT STICKSTOFF
ATTENTION!
CIRCUIT FRIGORIFIQUE PRE-CHARGE AVEC AZOTE
BHИМАНИЕ!
СИСТЕМА ЗАПРАВЛНА АЗОТОМ
3. Nitrogen precharge warning
Units are delivered from the manufacturer
with an overpressure. Check pressure on
the Schrader valve. With unpressurised unit:
Immediate report to manufacturer and note on
bill of delivery.
6. Fan motor
Fan motor item number.
7. Electrical warning
Electrically powered component. Switch off
power supply before any maintenance or instal-
lation activity.
8. Fan direction
Sticker indicates fan rotation direction
9. Moving parts
Warning: moving parts.
Switch off power supply before any mainte-
nance or installation activities.
41103043SP
Spare part item number
4/5. In/Out
Refrigerant connection inlet and outlet.
IN OUT

AHE00047EN 2001
8
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Always follow guidelines and instructions as given in the air cooler product manual AHE00042.
Optigo CC air coolers are delivered on a wooden pallet, either covered with a wooden folding box
or a wooden reinforced crate. Handling and positioning can take place manually (smaller models) or
with use of a forklift. When more cooler units are delivered in a single shipment, packed air coolers
may be stacked during transportation.
In order to avoid damage to the air cooler or fall-
ing of the unit, ensure that the lifting forks fully
cover the support pallet.
4 Unpacking and lifting
Respect the maximum number of stacked air
cooler units.
max. units floor stacking
251-254 : 5
301-404 : 4
501-504 : 2 max. 2
A
Folding box (CC251-403)
Place the unit on the ground.
Unscrew the fixings from the top of the box and
remove the cover.
Unscrew the fixings from the bottom of the box
and remove it.
Remove the fixing screws from the lower support
pallet.
4.1 Unpacking

AHE00047EN 2001
9
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
For CC400/500, turn mounting brackets into
correct position and secure with supplied fixing
materials.
The cooler is now ready to be lifted into mount-
ing position.
CC400/500 & CCB400/500
Unpacked models 400/500 are in mounting
postion.
Remove driptray (supplied unmounted).
CC250/350 & CCB300/350
Unpacked models 250/300/350 must be turned
before mounting.
Manually turn the air cooler into mounting posi-
tion on a second wooden pallet. Use adequate
protective material to prevent the driptray from
damaging. The cooler is now ready to be lifted
into mounting position.
4.2 Lifting
Wooden crate (CC404-504 & CCB301-504)
Place the unit on the ground and loosen the fix-
ing materials from the top crate.
Remove top crate.
Remove the fixing screws from the lower support
pallet.

AHE00047EN 2001
10
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
After having fixed the cooler to the ceiling, place
driptray on its hinges (CC400/500 only).
Use supplied fixing materials to fasten the drip-
tray.
Lift the unit into mounting position and
secure following instructions given in chapter
"Installation".

AHE00047EN 2001
11
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
5.1 Mounting dimensions
Detailed drawings showing all required mounting and refrigerant
connection dimensions are available for download on alfa.luvegroup.com.
Dimensional drawings
5 Installation
Always follow guidelines and instructions as given in the air cooler product manual AHE00042.
L
C
Ø1"
A
( B ) ( B )
H
30
10
50
18
CC250/350
CC400/500
G ext.
L
C
Ø1"
A
( B ) ( B )
H
30
10
50
18
CCB300/350
CCB400/500
G ext.
cooler
model
Dimensions ± 5 mm Shipping
volume
C H L A B m3
Draw-through CC
CC 251 811 423 418 508 - 0.3
CC 252 1319 423 418 1016 - 0.5
CC 253 1827 423 418 1524 - 0.7
CC 254 2335 423 418 2032 1015 0.9
CC 351 811 602 418 508 - 0.4
CC 352 1319 602 418 1016 - 0.7
CC 353 1827 602 418 1524 - 0.9
CC 354 2335 602 418 2032 1015 1.2
CC 401 1046 668 583 600 - 0.7
CC 402 1646 668 583 1200 - 1.1
CC 403 2246 668 583 1800 - 1.5
CC 404 2846 668 583 2400 1200 2.1
CC 501 1297 854 583 850 - 1.3
CC 502 2147 854 583 1700 - 2.1
CC 503 2997 854 583 2550 - 2.9
CC 504 3847 854 583 3400 1700 3.7
Blow-through CCB
CCB 301 811 482 609 508 - 0.5
CCB 302 1319 482 609 1016 - 0.7
CCB 303 1827 482 609 1524 - 1.0
CCB 304 2335 482 609 2032 1016 1.2
CCB 351 1046 606 651 600 - 0.7
CCB 352 1646 606 651 1200 - 1.0
CCB 353 2246 606 651 1800 - 1.5
CCB 354 2846 606 651 2400 1200 1.9
CCB 401 1046 665 651 600 - 0.8
CCB 402 1646 665 651 1200 - 1.2
CCB 403 2246 665 651 1800 - 1.6
CCB 404 2846 665 651 2400 1200 2.0
CCB 501 1297 854 902 850 - 1.7
CCB 502 2147 854 902 1700 - 2.7
CCB 503 2997 854 902 2550 - 3.7
CCB 504 3847 854 902 3400 1700 4.7

AHE00047EN 2001
12
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
5.2 Mounting bracket
Use extra wide washers (ISO 7093) when
mounting the unit to the ceiling.
5.3 Technical spaces
Respect the minimum wall distance on suction
side.
D
D≥Hcoil
Hcoil
L
D
D≥L
Respect the minimum space for defrost heater
extraction and replacement.
30
10
50
18
CC250/300/350 CC400/500
extra wide washers
ISO-7093
5.4 Refrigerant connections
Never bend the air cooler refrigerant connection
tubes.

AHE00047EN 2001
13
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
5.6 Drain line
The drain line diameter must be at least the size
of the driptray drain diameter and should be laid
with an adequate slope. For room temperatures
below 0° C drain line insulation and defrosting
are required.
A syphon must be installed on the drain line,
outside the cold room
Tighten drain connection by hand only.
Picture shows the T-connection for refrigerant
and hotgas defrost inlet.
5.5 Hotgas connection (optional)
hotgas
connection
refrigerant
connection

AHE00047EN 2001
14
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Electrical connections
5.7 Electrical connections
The following data determine which connection diagram is to be selected
and respected for electrical installation:
• Heat exchanger model indication
• Fan motor type
• Electrical options
Electrical connections 1-phase AC fan motors
2 fans1 fan
Electrical connection diagrams are available for download on alfa.luvegroup.com. When in doubt
always contact your local supplier or Alfa LU-VE representative for assistance.
Please find below the electrical connection diagrams for standard configurations.
M
1
~
LN PE
L N PE
-M1
BK
BN
GNYE
M
1
~
M
1
~
LN
PE
L N PE
-M1
L N PE
-M2
BK BK
BN BN
GNYE GNYE

AHE00047EN 2001
15
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
M
1
~
M
1
~
M
1
~
M
1
~
LN PE
L N PE
-M1
L N PE
-M2
L N PE
-M3
L N PE
-M4
BK
BN
GNYE
BK
BN
GNYE
BK
BN
GNYE
BK
BN
GNYE
M
1
~
M
1
~
M
1
~
LN PE
L N PE
-M1
L N PE
-M2
L N PE
-M3
BK
BN
GNYE
BK
BN
GNYE
BK
BN
GNYE
4 fans
3 fans
Electrical connections 1-phase AC fan motors

AHE00047EN 2001
16
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Electrical connections 3-phase AC fan motors
2 fans
1 fan
M
3
~
UV
W
U1 V1 W1 PE TK TK
-M1
TK1
PE TK TK
BN
GY
BK
GNYE
WH
PK
M
3
~
M
3
~
UV
W
U1 V1 W1 PE TK TK
-M1
TK1
PE TK1TK2
TK3
U1 V1 W1 PE TK TK
-M2
TK2
WH
BN
GY
BK
GNYE
WH
PK
BN
GY
BK
GNYE
PK

AHE00047EN 2001
17
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
M
3
~
M
3
~
M
3
~
UV
W
U1 V1 W1 PE TK TK
-M1
TK1
PE TK1TK2 TK3
U1 V1 W1 PE TK TK
-M2
TK2
U1 V1 W1 PE TK TK
-M3
TK3
TK4
WH WH
PK
BN
GY
BK
GNYE
WH
PK
BN
GY
BK
GNYE
BN
GY
BK
GNYE
PK
M
3
~
M
3
~
M
3
~
M
3
~
UV
W
U1 V1 W1 PE TK TK
-M1
TK1
PE TK1TK2 TK3
U1 V1 W1 PE TK TK
-M2
TK2
U1 V1 W1 PE TK TK
-M3
TK3
TK4TK5
U1 V1 W1 PE TK TK
-M4
TK4
WH WH WH
PK PK
BN
GY
BK
GNYE
WH
PK
GNYE
BK
GY
BN
GNYE
BK
GY
BN
PK
GNYE
BK
GY
BN
4 fans
3 fans

AHE00047EN 2001
18
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Electrical connection for 1-4 EC fan motors 1-phase (2-speed, CC250 only)
M
1
~
M
1
~
M
1
~
M
1
~
LSNN
PE
L
N PESN
-M1
L
N
PESN
-M2
L N PESN
-M3
L N PESN
-M4
BK
GY
BN
GNYE GNYE
BN
GY
BK
GNYE
BN
GY
BK
GNYE
BN
GY
BK
Fan speed selection
High/Low
Open the connection box. You will find the
electric wiring diagram inside.
High speed connection
Connect blue wire (N) to neutral.
Connect black wire (L) to power supply.
Low speed connection
Connect blue wire to neutral (N) and black wire
to power supply (L).
Open the orange clamps from the blue and
brown wires.
Create a jumper connection between the brown
(SN) and the blue (N) wires. This extra piece of
cable is not supplied with the unit.
black
blue
brown
blue
black

AHE00047EN 2001
19
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Black: 230 VAC, 50-60 Hz
Blue: Neutral
Green/Yellow: Protective earth
Blue: GND - Control interface
Yellow: Control input 0-10V or PWM
Red: Voltage output +10V (1.1 mA)
White: Tach output
Electrical connection for 1-4 EC fan motors 1-phase with 0-10V speed regulation
High speed setting
The “High speed” setting provides the maxi-
mum fan speed according to datasheet. This is
achieved when a jumper connects the +10 V
output of the fan motor to the inlet signal (see
electrical scheme).
If continuous rpm modulation is needed, the
jumper should be removed and replaced by an
external signal (between 0 and 10 V max). The
jumper connection can be made in the connec-
tion box or inside each fan motor’s “black box”.
Low speed setting
The “Low speed” setting provides the reduced
fan speed according to datasheet. This is
achieved with a resistance kit reducing the steer-
ing signal from 10 V to 6.7 V. The fan will oper-
ate at a fixed rpm value.
If continuous rpm modulation is needed, the
resistance kit should be removed and replaced
by an external signal (between 0 and 6.7 V
max).
This resistance kit is located inside the connec-
tion box (if selected) or inside each fan motor’s
“black box”.
L N
PE +10V 0-10V GND
-M
1
L
N
PE +10V 0-10V
GND
-M2
L
N
PE +10V 0-10V GND
-M3
L N
PE +10V 0-10V
GND
-M4
LN
PE
10V SN 0V
Signal box
BK
BN
GNYE
BK
BN
GNYE
BK
BN
GNYE
BK
BN
GNYE
BU
GY
BK
GY
BK
GY
BK
GY
BK
Jumper connection for xed high fan speed.
Replace with 6.7V resistance for low fan speed
or external signal for rpm modulation.
Jumper
Resistance kit
10V
Axial-lead resistor 0.25W
SN 0V
3.9 k
Ω ± 5% 6.8 k Ω ± 5%

AHE00047EN 2001
20
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
Electrical connection for electric defrost CC400 & CC500
Electrical connection for 1-4 EC fan motor 3-phase with 0-10V speed regulation
M
1
~
Control
M
1
~
Control
M
1
~
Control
M
1
~
Control
L1 L3 PE +10V 0-10V GND L2
-M
1
L1 L3 PE +10V 0-10V GND L2
-M2
L1 L3 PE +10V 0-10V GND
L2
-M3
L1 L3 PE +10V 0-10V GND L2
-M4
L1 L3 PE 10V
SN 0VL2
Signal box
Jumper connection for xed high fan speed.
Replace with 6.7V resistance for low fan speed
or external signal for rpm modulation.
For High/Low fan speed setting and fan speed modulation follow the same procedure as given for
the 1-phase fan motors on page 19.
U V W
N
PE
PE
-R1
PE
-R4
PE
-R7
PE
-R10
PE
-R2
PE
-R5
PE
-R8
PE
-R11
PE
-R3
PE
-R6
PE
-R9
PE
-R12