31
INSTALLATION AND OPERATION MANUAL
ENGLISH
13 ELECTRICAL WIRING 
13.1. GENERAL CHECK
12 DRAIN PIPING 
12.1. DRAIN DISCHARGING BOSS
When the base of the outdoor unit is temporarily utilized as a drain 
receiver and the drain water in it is discharged, this drain boss is utilized 
to connect the drain piping.
Model Applicable Model
DBS-26 H(V)RNM(1)E/HVRNS1E
Connecting procedure
1. Insert the rubber cap into the drain boss up to the extruded 
portions
2. Insert the boss into the unit base and turn approximately 40 
degree counterclockwise.
3. Size of the drain boss is 32 mm (O.D.)
4. A drain pipe should be eld-supplied
 NOTE:
Do not use this drain boss set in a cold area, because the drain 
water may freeze.This drain boss is not sufcient to collect all 
the drain water. If collecting drain water is completely required, 
provide a drain-pan that is bigger than the unit base and install it 
under the unit with drainage.
1. Ensure that the eld-supplied electrical components (mains power 
switches, circuit breakers, wires, connectors and wire terminals) have 
been properly selected according to the electrical data indicated. 
Make sure that they comply with national and regional electrical 
codes.
2  Following the Council Directive 2004/108/EC(89/336/EEC), relating 
to electromagnetic compatibility, next table indicates: 
Maximum permissible system impedance Z
max 
at the interface point of 
the user’s supply, in accordance with EN61000-3-11
MODEL Zmax (Ω)
RAS-3HVRNME
-
RAS-4HVRNM1E/4HVRNS1E
0.41/0.31
RAS-5HVRNM1E/5HVRNS1E
0.29/0.29
RAS-6HVRNM1E/6HVRNS1E
0.29/0.29
3. Harmonics situation of each model regarding IEC 61000-3-2 and IEC 
61000-3-12 is as follows:
MODELS SITUATION REGARDING 
IEC 61000-3-2 AND IEC 61000-3-12 
Ssc “xx” 
MODELS
Ssc “xx” 
(KVA)
Equipment complying with IEC 61000-3-2 
(professional use
(*)
)
RAS-4HRNM1E 
(*)
RAS-5HRNM1E 
(*)
RAS-6HRNM1E 
(*)
-
RAS-3HVRNME
RAS-4HVRN(S/M)1E
RAS-5HVRN(S/M)1E
RAS-6HVRN(S/M)1E
-
4. Check to ensure that the power supply voltage is within +/-10% of the 
rated voltage.
5. Check to ensure that power supply has an impedance low enough to 
warranty not reduce the starting voltage more than 85% of the rated 
voltage.
6. Check to ensure that the ground wire is connected.
7. Connect a fuse of specied capacity.
 WARNING:
Check to ensure that screws for terminal block are tightly 
tightened.
 CAUTION:
Check to ensure that the indoor fan and the outdoor fan have 
stopped before electrical wiring work or periodical check is 
performed.
Protect the wires, drain pipe, electrical parts, from rats or other 
small animals. If not protected, rats may damage unprotected 
parts, and at the worst, a re will occur.
Wrap the accessory packing around the wires, and plug the wiring 
connection hole with the seal material to protect the product from 
any condensed water and insects.
Tightly secure the wires with the cord clamp inside the indoor unit.
Lead the wires through the knockout hole in the side cover when 
using conduit.
Secure the cable of the remote control switch with the cord clamp 
inside the electrical box.
Electrical wiring must comply with national and local codes. 
Contact your local authority in regards to standards, rules, 
regulations, etc.
Check that the ground wire is securely connected. 
Connect a fuse of specied capacity.
 DANGER:
Do not connect of adjust any wiring or connections unless the 
main power switch is OFF.
Check that the earth wire is securely connected, tagged and 
locked in accordance with national and local codes.
 NOTE:
Check and test to ensure that if there is more than one source of 
power supply, that all are turned OFF.
Rubber cap
Drain Boss
Extruded portion
Drain pipe
Drain pipe
Drain hole of 
Base
PMML0197_r0_04-10.indb   31 08/07/2010   9:20:50