65 PB
INSTALLATION
Refrigerant Piping
NOTE:
Do not use the drainage elbow in cold climate
applications. If elbow must be used, field supplied
insulation should be considered as drain may
freeze and stop the fan operation if basepan heater
cannot overcome ice build up due to stoppage.
Refrigerant piping
1. Piping requirement
Model
Outer Diameter of Pipe [ in.]
24k
36k
48k/60k
Gas
Liquid
5/8
3/4
7/8
3/8
The shorter the refrigerant piping is, the better the performance will be.
3/8
3/8
T
Refrig
he outdoor uni
erant a
t
ddi
is
ti
pre-
on
c
al c
harged
har
g
wi
e
Additional refrigeran
th refrigerant
24K/36K: Addit
t
ional refrigerant
(R410A)
mmoda
pi
t
n
e
g
a
be
a
o
l
nd ft.
to acco to
y
t pi
pi
25
ng le
.
ngth of 25ft.
48K/60K: Additional refrigerant
is
charge
charge
required
=
=
for
(L-25)
(L-25)
ex
f
f
t
t
t
×
×
0
0
ending
.
.
38
60
t
oz/
oz/
he
f
f
t
t
pi
2.
(1)
(2)
P
Us
Us
iping
e
e
c
lo
c
ma
lean
al
t
s
erial
upplied
piping
e sure
copper
t remove
t
ha
any
t
dust
there is no
or f
oreign
dust
an
ma
d
t
e
the inside of the
c
c
kne
rogen
s
opper
s
or
and
pipe
dr
y
ma
s.
are shown low.
ria
moi
l
st
bef
ure
or
i
e
nsid
con
e t
nec
he
t
in
p
g
ipes
pi
.
pe
B
s.
low
(3)
pipes
P
iping
with
thi
nit air
t as be
D
in
ia
m
ches
eter Thick
inches
ness
1/32
1/32
1/32
1/32
1/32
1/32
Ma
erial
o
k
of the pipe
Ø 1/4
Ø 3/8
Ø 1/2
Ø 5/8
Ø 3/4
Ø 7/8
10. PIPING WORK AND REFRIGERANT CHARGE
10. Piping work and refrigerant charge
10.1 MAX. length allowed
Additional refrigerant charge
24K/36K: Additional refrigerant charge= (L-25) ft×0.38 oz/ft
48K/60K: Additional refrigerant charge= (L-25) ft×0.60 oz/ft
1) To avoid storing too much oil in the oil trap, the oil trap should be as short as possible.
2) The horizontal piping should slope down along the refrigerant ow direction, to bring the oil
back to compressor , the slope is about 1/200 to1/250.
3) In order to ensure better cooling/heating performance, the refrigerant piping should be as short
and straight as possible.
When the indoor unit is lower than outdoor unit and height difference is larger than 16.4ft.(
Set an oil trap every 16.4ft. (height difference) on suction piping.
NOTE:
Oil trap
Slope: 1/200~1/250
Slope: 1/200~1/250
Pipe length L
Height dierence H
Indoor unit
Outdoor unit
Model
Max. Pipe
length (L)
Max. Height
difference
(H)
Add.
Refrigerant
[exceed 25ft
7.6m]
24K 164ft. 98ft.
0.38(oz/ft)
36K 246ft. 98ft.
0.38(oz/ft)
48K/60K 246ft. 98ft.
0.60(oz/ft)
Indoor Unit
Outdoor Unit
NOTE:
Do not use the drainage elbow in cold climate
applications. If elbow must be used, field supplied
insulation should be considered as drain may
freeze and stop the fan operation if basepan heater
cannot overcome ice build up due to stoppage.
Refrigerant piping
1. Piping requirement
Model
Outer Diameter of Pipe [ in.]
24k
36k
48k/60k
Gas
Liquid
5/8
3/4
7/8
3/8
The shorter the refrigerant piping is, the better the performance will be.
3/8
3/8
T
Refrig
he outdoor uni
erant a
t
ddi
is
ti
pre-
on
c
al c
harged
har
g
wi
e
Additional refrigeran
th refrigerant
24K/36K: Addit
t
ional refrigerant
(R410A)
mmoda
pi
t
n
e
g
a
be
a
o
l
nd ft.
to acco to
y
t pi
pi
25
ng le
.
ngth of 25ft.
48K/60K: Additional refrigerant
is
charge
charge
required
=
=
for
(L-25)
(L-25)
ex
f
f
t
t
t
×
×
0
0
ending
.
.
38
60
t
oz/
oz/
he
f
f
t
t
pi
2.
(1)
(2)
Us
Us
e
e
c
lo
c
lean
al
s
upplied
piping
e sure
copper
t remove
t
ha
any
t
dust
there is no
or f
oreign
dust
an
ma
d
t
e
the inside of the
c
c
kne
rogen
s
opper
s
or
and
pipe
dr
y
ma
s.
are shown low.
ria
moi
l
st
bef
ure
or
i
e
nsid
con
e t
nec
he
t
in
p
g
ipes
pi
.
pe
B
s.
low
(3)
pipes
P
iping
with
thi
nit air
t as be
D
in
ia
m
ches
eter Thick
inches
ness
1/32
1/32
1/32
1/32
1/32
1/32
Ma
erial
o
k
of the pipe
Ø 1/4
Ø 3/8
Ø 1/2
Ø 5/8
Ø 3/4
Ø 7/8