[
VII
Microprocessor Control ]
- 19 -
HWE1405A
GB
(1) Turning on the heater with the fan setting set to OFF requires that the DIP S/W and connectors on the indoor units are set on
site.
Fan control
(2) Back-up heating will not be performed when the heater turns on while demand control is performed (not a request item).
(3) This is applicable only to the R410 series. Make the settings for the following dip switches on the outdoor unit control board
before switching on the power.
2. PAC-YU25HT (Optional Parts) installation
The following section describes installation of the External Heater Adapter that connects to CITY MULTI air conditioner R410A
series indoor unit. This products is the special wiring parts to drive an electric heater with the air conditioner.
(1) Parts list
Check that the following parts are included in the package.
1) External output cable (with a yellow connector).............................2 in total
Two types of cables with different connectors are included.
2) Panel heater connector.................................................................. 3 in total
White: 1
Green: 2 (2 types)
* Panel heater connectors cannot be used with this unit.
(2) Connection to the indoor unit
Use the cables that fit the connectors on the indoor unit control board.
1) External output cable (with a yellow connector)
This cable is used to connect a relay circuit for an interlocked operation with either an electric or a panel heater.Select the
heater output pattern (1st =CN24-1 or 2nd = CN24-2) to use, and connect the cable to the connector on the indoor unit control
board that corresponds to the selection.
(3) Locally procured wiring
A basic connection method is shown below.
For relay X use the specifications given below Operation coil
Rated voltage: 12VDC
Power consumption: 1W or less
* Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
The length of the electrical wiring for the PAC-YU25HT is 2 meters (6-1/2 ft.)
Pattern
PVFY-NAMU-E
CN22 for FAN control (YU25)
DIP S/W3-4 (Indoor unit)
Fan in defrost
Fan (All modes other
than Defrost)
1
Disabled
(CN22 cannot be used with
this unit)
OFF
Stop (Heater OFF)
Set (Heater ON)
2
ON
Stop (Heater OFF)
High
*1
(Heater ON)
*1. While the heater is on, the fan will operate at high speed regardless of the fan setting on the remote controller.
* If a heater is installed in the duct, do not use CN22. By doing so, the fan will turn off when the heater is on,
which may result in fire.
CN24-1 or CN24-2
X
X
Remote control board
Relay circuit
Adapter
Indoor unit
control board
r
et
a
e
H
cir
t
c
el
E
e
cr
u
o
s r
e
w
o
p
Red
1
White
2
Preparations in the field
Maximum cable length
is 10 m (32ft)
w
oll
e
Y
Electric Heater
or panel
heater
Outdoor unit
control board
• PUHY, PURY-P-TGMU
type Dip switch SW5-2
“ON/OFF”
• PUHY, PURY-P-THMU/
YHMU/TJMU/YJMU type
Dip switch SW5-10 “ON/
OFF”
• PUHY, PURY-P-TKMU/
YKMU type Dip switch
SW4: 932 “ON/OFF”
• PUMY series
Dip switch SW4-4
“ON/OFF”
Содержание CITY MULTI PVFY-P12NAMU-E
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