LREQ5~20B7Y1
Air cooled refrigeration condensing unit
4PW74302-1D – 2016.11
Installation manual
16
• Liquid pipe arrival minimum temperature 0°C
Gas pipe arrival minimum temperature –45°C
• Reinforce the insulation material for the refrigerant piping
according to the environment of thermal installation. Otherwise, the
surface of the insulation material may result in dew condensation.
• If the dew condensation water on the shutoff valves is likely to flow
to the indoor unit side through the clearance between the insulation
material and piping because the outdoor unit is installed above the
indoor unit or for some other reasons, perform appropriate
treatment such as the caulking of the joints (see the illustrations
below).
• Attach the cover of the piping outlet with a knock hole opened. If
there is a feature of small animals intruding through the piping
outlet, cover the piping outlet with a blocking material (field supply)
on completion of the steps of
(see the illustrations below).
Use the piping outlet for jobs required during the steps of
"10. REFRIGERANT REPLENISHMENT" on page 16
of taking in the charge hose).
Note
• After knocking out the holes, we recommend you remove burrs in
the knock holes and paint the edges and areas around the edges
using the repair paint.
8-3 Checking of device and installation conditions
Be sure to check the followings.
For those doing electrical work
"7-2 Procedure for incoming wiring" on page 12
.
1.
Make sure there is no faulty power wiring or loosing of a nut.
"7-3 Procedure for power supply wiring" on page 13
2.
Has the insulation of the main power circuit deteriorated?
Measure the insulation and check the insulation is above regular
value in accordance with relevant local and national regulations.
For those doing pipe work
1.
Make sure piping size is correct.
"6-1 Selection of piping material" on page 7
2.
Make sure insulation work is done.
"8-2 Thermal insulation work" on page 15
.
3.
Make sure there is no faulty refrigerant piping.
"6. REFRIGERANT PIPING" on page 6
9. CHECKS AFTER WORK COMPLETION
• Make sure the following works are complete in accordance with the
installation manual.
Piping work
Wiring work
Air tight test/vacuum drying
Installation work for indoor unit
10. REFRIGERANT REPLENISHMENT
For refrigerant filling contractor
Use R410A for refrigerant replenishment.
The R410A refrigerant cylinder is painted with a pink belt.
Warning
Electric Shock Warning
• Securely close the control box lid before turning power on.
• Before turning power on, check through the inspection hole (on the
left-hand side) of the control box lid that the operation switch is set
to OFF.
If the operation switch is set to ON, the fan may rotate.
• Check the LED indicators on the PCB (A1P) of the outdoor unit
through the inspection hole (on the right-hand side) of the control
box lid after the outdoor unit is turned on (see the illustration).
(The compressor will not operate for approximately 2 minutes after
the outdoor unit is turned on.
H2P blinks for the first five seconds when the power supply is
turned on. If the equipment is normal, H2P will be turned off in five
seconds. H2P lights for abnormality.)
Liquid side
shutoff valve
Gas side
shutoff valve
Indoor/Outdoor
interunit piping
Insulation material
Coking, etc.
Piping lead-out
hole lid
Gas side piping
Liquid side piping
Open a knock
hole at
Block
Inspection hole
(left-hand side)
Inspection hole
(right-hand side)
Control box
Inspection hole (left-hand side)
(upper left-hand side of control box)
Inspection hole (right-hand side)
(upper right-hand side of control box)
Control box lid
LED
(H1P~8P)
Lift up this tab and
open the cover.
Inspection
hole cover
REMOTE OFF
ON
Operation switch
(factory set: OFF)
( )
Setting of spare parts
For details please refer to the
INSTRUCTION FOR REPAIR
WITH SPARE PARTS
OFF
ON
ON
OFF
The evaporation
temperature setting
Setting by dip switches
It is not used
1
3
DS1
2
3
4
1
2
4
DS2
4PWEN74302-1D.book Page 16 Thursday, April 27, 2017 9:01 PM
