Guidelines When Connecting Piping Branching - Daikin LRMEQ4BY1 Installer And User Manual

a
b
c
d
2 Choose a piping route (a, b, or c).
a c
b
3 If you have chosen the downwards piping route:
▪ Drill (a, 4×) and remove the knockout hole (b).
▪ Cut out the slits (c) with a metal saw.
a b
4× Ø6 mm
c c
4 Do the following:
▪ Connect the liquid pipe (a) to the liquid stop valve.
▪ Connect the gas pipe (b) to the gas stop valve.
b
a
NOTICE
When brazing: First braze the liquid side piping, then the
gas side piping. Enter the electrode from the front of the
unit and the welding torch from the right side to braze with
the flames facing outside and avoid the compressor sound
insulation and other piping.
A
a b
a Electrode
b Burning-resistant plate
c Welding torch
d Flames
e Compressor sound insulation
f Liquid side piping
g Gas side piping
LRMEQ+LRLEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1A – 2018.09
A
e d c
a b f g
c
▪ Connect the gas piping accessories (c, d, e), and cut them to
the required length (e1). This is necessary because the size
of the gas stop valve is Ø15.9 while the piping between
outdoor unit and first refrigerant branch kit is Ø19.1.
Possibility 1: To the front
c
f e1 e d
Possibility 3: Downwards
c Gas piping accessory 1
d Gas piping accessory 2
e, e1 Gas piping accessory 3 (cut it to the required length)
f Field supply
5 Reattach the service cover and the piping intake plate.
6 Seal all gaps (example: a) to prevent snow and small animals
from entering the system.
a
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
6.4.10 Guidelines when connecting piping
branching
Liquid piping branching
▪ Install liquid piping joints horizontally. This will prevent an uneven
flow of refrigerant.
▪ Install liquid piping headers downwards.
6 Installation
Possibility 2: To the side
c
d e1 e f
c
e
e1
f
Installer and user reference guide
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