Engineering Manual

How to Use / How to Install
External Heater Adapter CN24RELAY-KIT-CM3
(1) Basic wiring
Use X relay having the following specifications
Rated voltage : 12VDC
Power consumption : 0.9W or less
* Always insert a diode on both ends the relay coil.
The length of the electrical wiring for the CN24RELAY-KIT-CM3 is 2 meters (6-1/2 ft).
For longer lengths, up to no more than 10 m (32ft), use sheathed 2-core cable.
Control cable type : CVV, CVS, CPEV or equivalent.
Cable size : 0.5 mm
2
~ 1.25 mm
2
(16 to 22 AWG)
(2) Recommended circuit
The length of cable connecting the heater adapter to the circuit board of the indoor unit must be no more than 10 meters (32ft).
Any cable longer than 10 meters (32ft) could cause improper operation.
Use a transit relay when extending the wiring.
* Table 1 shows how the field-installed heater is controlled. Select the desired operation in the table below, and set the DIP S/W on the outdoor
and indoor units as shown in Table 1. Table 2 shows Heater Control patterns #A and B.
Table.1
*1 DIP S/W3-4 setting on NON ducted unit is used for Vane Control function. DIP S/W3-4 setting is not required.
*2 For ducted units when S/W3-4 is ON, heater is ON in defrost mode.
*3 Heater On signal can not be output in the following cases for safety reasons.
1 Field-supplied Wiring
2 Wiring Restrictions
3 Control specifications and DIP Switch settings
Outdoor unit
setting
Condition of outdoor unit
Ducted unit
(
PEFY-NMSU-E, PEFY-NMH(S)U-E, PVFY,
PEFY-NMAU-E, PFFY-N
EMU-E, PFFY-NRMU-E
)
NON ducted unit
(PL/PK/PC/PM)
DIP S/W OFF
In the case of:
• TGMU: S/W5-2 OFF
• THMU
/YHMU/TJMU/
YJMU
: S/W5-10 OFF
• TKMU/YKMU:
SW4: 932 OFF
• PUMY: S/W4-4 OFF
Applies to ALL Condenser unit models.
N/A
DIP S/W3-4
OFF (Indoor unit)
Heater control #A
(defrost/error:
Heater OFF)
Heater control #A
(defrost/error:
Heater ON)*1
DIP S/W3-4
ON (Indoor unit)*2
Heater control #A
(defrost/error:
Heater ON)
DIP S/W ON
In the case of:
• TGMU:
S/W5-2 ON
•
THMU/YHMU
/TJMU/YJMU
:
S/W5-10 ON
• TKMU/YKMU:
SW4: 932 ON
• PUMY:
S/W4-4 ON
Applies to ONLY Air Cooled Condenser
unit models that have OA sensor.
Normal
drive
Heater OFF Heater OFF
Defrost
drive
H/P drive
H/P stop
DIP S/W3-4
OFF (Indoor unit)
Heater control #A
(defrost/error:
Heater OFF)
Heater control #B
(defrost/error:
Heater ON)*1
DIP S/W3-4
ON (Indoor unit)*2
Heater control #B
(defrost/error:
Heater ON)
CN24
CN22/CN4YX
X
+
–
Remote control board Relay circuit Adapter
Indoor unit
control board
Outdoor unit
control board
Electric Heater
External output cable 12VDC
Fan control connector 5VDC
• 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
Green/White
Electric Heater power source
On-site preparation Maximum cable length is
10 m (32 ft)
Yellow
Red 1
White 2
White 1
White 2/3
Green/ White
Yellow/ Orange
FS1
FS2
FS1
FS2
R
S
R
S
CN24
H2
X
H1
X
26H
X
1-phase power
supply
208V, 230V/60Hz
Control board
FS1, 2 ------Thermal fuse
H1, H2 ------Electric heater
26H----------Overheat protection thermostat
X -------------Relay (Electromagnetic contactor)
a b c d
Parameters a/b/c/d are set by
Maintenance Tool.
Normal drive
Defrost drive
H/P drive
H/P stop
Condition of O/U
Outdoor temp.
278