EK3 Frontier Boiler Manual
34
Seventh Edition- October 2015
5
sys-
08
-0
20
-r
ev
5
.dw
g
S
Y
S-08-020
5/10
/05
JS
Sheet 8
o
f
8 Piping (
S
e
e
s
h
e
e
ts 1
t
h
ru
7 for
wirin
g
)
EK
3 with
D
ig
it
a
l
M
g
r, wi
th
H
e
a
t & DH
W &
Inject
io
n
Retur
n
Header
Supply H
eader
3/4" Zone
Valv
es
(z
ones
as
required)
Sma
rt
Pump
Ta
c
o
006I
FC
Pl
ate Heat
Ex
changer
Su
pp
ly
Wa
te
r
ZHW
ZXX
ZXX
ZXX
ZXX
Domestic H
o
t Water
Stor
age Tank
High Limit
Aquas
tat
Open on Ri
se
Au
to Res
e
t
EK3 E
n
e
rgy
Converter
Hi
gh Limit
A
quastat
Open on R
ise
Manual
Reset
B
o
iler By
pas
s
Prim
ary
Loop (2)
In
je
ct
io
n
Ci
rcul
ator
In
je
ct
io
n
& Header
Ci
rcul
ator
T
a
c
o
0012
S
ee Not
e
6
Fl
ow
C
hec
k
By
pas
s
Ci
rcul
ator
T
a
c
o
007
LWC
O
Bo
iler Fee
d
Sensor Wel
l
for
Di
gi
tal Manager
ZXX
No
te
s
:
1. Use EK-2 s
ize
s
u
pply and return
headers,
1
-1/4"
di
ameter
wi
th
3/
4" ports
, EK part
# 10-0213S.
2. Se
t aquas
tat
s on
boiler per boiler manual.
3. The 1-
1/4" zone valve
must
be
hi
gh
flow,
such
as
White Rodgers
, EK par
t# 10-0156.
4. K
eep injec
tion piping as
s
h
ort
as
pr
act
ical,
under
10 feet i
f possibl
e
.
5. See
drawing
SY
S-04-019 for pipe
si
z
e
s re
qu
ir
e
d
f
o
r
mult
i
EK3
boil
e
r
instal
lati
ons.
6.
If
the Injecti
on
& He
ader C
ir
c
i
s
a
0012
IFC
(integral
flow c
h
eck
),
the
flow c
hec
k can
be
removed for greater fl
ow
.
Balancing
val
v
e
1-
1/4"
Zone
Valve
Suppl
y
Ret
u
rn
Inj
e
c
tion Header
Ø 1-1/
2" Mi
n
Primary Loop (1)
Ø 2"
Mi
n
