AHRI K2WT, Installation, Operating And Service Instructions

Page: 70 / 164

70
107110-01 - 6/16
IX. System Piping
(continued)
Figure 9.3b: Piping Method #2 - Near Boiler Piping - Heating Plus Indirect W
ater Heater
Flo
w
C
hec
k
H
ea
ting
C
irc
ul
ato
rs
O
pt
io
nal
Fu
ll
Po
rt
Is
ola
tio
n
V
al
ves
O
pt
io
nal
Fu
ll
Po
rt
Is
ola
tio
n
V
al
ves
To
S
yste
m
From Syste
m
A
ir S
ep
ara
tor
&
A
ir
V
ent
Exp
ansi
on
Ta
nk
H
ea
der
Tempe
ra
tu
re
S
ens
or
(W
hen
U
se
d)
C
old
W
at
er
Li
ne
Y-S
tra
in
er
(R
eco
mmen
de
d)
S
yste
m
Z
one
V
al
ves
H
ea
ting
S
yste
m
C
ircul
ator
To
S
yste
m
B
oi
le
r
Pum
p
D
ra
in
V
al
ve
U
ni
on
s
Fu
ll
Po
rt
Is
ola
tio
n
V
al
ves
Tee
&
Pl
ug
(R
eco
mmend
ed
F
or
F
utu
re
H
ea
t
Excha
ng
er Se
rv
ic
e)
Re
lie
f
V
al
ve
C
lo
se
N
ip
ple
(L
oca
te
H
ea
de
r
Se
ns
or
A
s
C
lose
A
s
Poss
ibl
e
To
D
ow
ns
tr
ea
m
T
ee)
H
yd
ra
ul
ic S
ep
ara
tor
M
ay B
e
Substi
tute
d
Fo
r
Tees
Fil
l
V
al
ve
B
ac
kflo
w
Prevente
r
Flo
w
C
hec
k
Fu
ll P
or
t
Is
ola
tio
n
V
al
ves
Ind
ir
ec
t
C
ircul
ator
Ind
irect
D
om
es
tic
W
at
er
He
ate
r
(IW
H
)
Ind
ir
ec
t
Su
pp
ly
Ind
ir
ec
t
R
et
ur
n
C
AU
TIO
N
It
is
the
inst
al
lers
resp
on
si
bi
lity
to
se
le
ct
boi
le
r
pi
pi
ng
co
nfi
gu
ra
tio
ns
th
at
provi
de
the
pr
ope
r
flo
w r
ates
a
nd
per
form
an
ce
f
or
the
bo
ile
r
an
d
ind
irect
w
ate
r
he
ate
r.
N
ot
es
:
1.
B
oi
ler
Pum
p L
oca
te
d I
nsi
de
B
oi
le
r J
ack
et.
2.
M
anu
al
Ai
r
Ven
t
Loca
te
d
On
To
p O
f
H
ea
t
Exc
ha
nge
r.
S
ee
Fi
gure
1
1.1
.