Lochinvar CREST 2.5 User Manual

58
Installation & Operation Manual
JUNCTION BOX
TERMINAL STRIP
120V SUPPLY "L"
TERMINAL STRIP
120V SUPPLY "N"
120VAC NEUTRAL
INTEGRATED CONTROL
ON/OFF
SWITCH
F2
3.15
A
F4
5
.0 A
SYSTEM PUMP
R
ELAY
BO
ILER PUMP
RELAY
DHW PUMP
RELAY
X1-1
X1-2
X
1
-
4
X1-8
X
2-4
SMA
L
L B
L
OW
ER
RELAY
LARG
E
BLO
W
ER
RELAY
SMALL G
A
S
VA
LV
E R
E
L
A
Y
LARGE GAS
VA
LVE
RELAY
X1-6
X10-1 X10-2
X10-3
S
MALL GA
S
VALVE
RELAY
LA
RGE GAS
VALVE RELAY
X10-6
X
10
-5
X10-4
GAS
VALVE
(
L
A
R
GE)
GAS
VALVE
(
SMALL)
TERMINAL STRIP
SYSTEM
P
UMP
CONTACTOR
BO
LIE
R PUMP
CONTACTOR
DHW
PUMP
CONTACTOR
SMALL BLOW ER
R
ELAY
LA
RGE BLOWER
R
ELAY
SMA
LL
B
LO
W
ER
LARG
E BLOWER
X6-10
X13-4
X6-1
X2-5
21
3
21
3
MODBUS
X
1-1
X1-2
X1-3
FLUE DAMPER
TRANSFORM
E
R
M
1
2
3
24V
TRANSFORMER
FL
UE DAMPER
X6-3
X1-12
X1-3
LWCO
BOA
RD
TE
ST
S
WITCH
L
W
CO
PROBE
LWCO R
ESET
J
3-
6
J3-3
J
2-1
J2-2
J3-5
J
3-2
J3
-
4
X6-5
X
6-15
X6-12
X
13
-
1
X6-6
X3-3
X3-4
X
3
-1
X3-2
X
6-11
X6-2
X
6
-
1
4
INTEG
RATED
CONTRO
L
GPS1 GPS2GPS3
B
L
OWE
R PRO
V
ING
SWITCH
(
L
A
RGE)
BLOWER PROVING
SWITCH (SM
A
LL)
BLO
CKED FLUE
SWITCH
BLO
C
KED DRAIN
SWITCH
1
2
3
4
5
6
7
8
9
1
0
11
12
13
14
15
16
A
L
A
RM
CONTACTS
RUN
-TIME
CONTACTS
T
ANK
THERMOSTAT
LOUV
ER
P
ROVING
24
V
AC LOU
V
ER
RELAY
COIL
AUX
S
WITCH 1
AUX
S
WITCH 2
E
N
ABLE
R
W
S
M
A
LL
CONNE
CTION BOARD
CN1-4
CN1-5
CN1-6
CN1
-
12
CN1-10
X
6
-
1
3
X6-4
CN1-11
CN1-9
CN1-8
CN1-7
CN1-1
CN1-2
CN1-3
HIGH LIMIT
SWITCH
X1-3
X1-7
X
1
-
1
0
X2-5
FLAME
SENSE 2
FLAME
SENSE 1
SPARK
GENERATO
R
SPARK
ROD
17
18
19
20
21
22
23
24
25
26
27
2
8
29
30
31
32
33
34
35
3
6
37
38
39
40
SHIEL
D
SH
IELD
A
B
MODBUS
OPTION
+
-
-
+
RATE
O
UT
BO
ILE
R
P
UMP OUT
SYSTEM RETURN
SENSO
R
SYSTEM SU
PPL
Y
SENSOR
0-10V
0-10V
TANK
SENS
O
R
O
UTDOOR
SENSOR
+
+
-
-
0
-
10
V
0-10V
BMS
IN
S
YSTEM
PUM
P
IN
S
HIELD
SHIEL
D
A
B
C
ASCADE
LARGE
CONNECTION BO
A
RD
CN6-1
CN3-6
CN3
-
7
CN3-14
CN3-13
CN3-11
CN3-9
CN3-8
CN
3-1
CN3-2
CN3-3
CN3-4
CN6-2
CN6
-
3
CN3-10
CN3-12
MODBU
S
BOARD
X
4-1
X4-2
X4-3
X6-3
X6-1
X
6
-
2
X
8
-
2
0
X8-10
X7-8
X8-13
X8-14
X8-12
INTEGRATED
CONTROL
CN3-4
X8-15
X
7
-
7
X8-11
X
8-6
X8-16
X8-7
X8-17
X
8-1
-
T
-
T
-
T
-
T
-
T
-
T
-
T
-
T
-
T
INLET SENSO
R
OUTLET SENSO
R (S9)
OUT
LET SENSOR (S1
)
FLUE SENSO
R
FLUE SENSOR (S10)
PRE-MIX SENS
O
R 1 (
S11)
P
RE-M
IX
SENSO
R
1 (S13)
PRE-MIX SENSOR 2 (S12)
P
RE-MIX
SENS
O
R
2
(
S14)
X8-3
X8-8
X8-2
X8-4
X8-9
X
7-1
X
7
-
5
X
7-2
X7-6
GROUND
X6-18
X6-9
X6-17
X6-8
X13-2
X13-3
1
2
4
5
1
2
4
5
S
M
A
LL BLO
W
ER
LARGE
BLO
WER
1.5A EACH MAX
X11
CN3
CN1
DU941
LCD
DISPLAY
X4
RIBBON CABLE
X5-1
X
5-7
X5-2
X5-8
X5-3
X5-9
X5-4
X
5-10
X5-5
X
5
-
41
X5-6
X
5
-
1
2
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
Notes:
1
. All wiring must be installed in accordance w
i
th:
local, state, provincial and national code requir
em
ents per either N
.E.C. in
U
SA or
C.S.A. in
C
an
ada.
2. If any original equipment w
ire
as supplied with the appliance must be replaced, it must be replaced w
i
th wire having same wire gauge
(AWG) and rated for
a
minimum of 105°C
. Exceptions
:
R
ep
lacement high voltage spark lead and ribbon cables
must be purchased
from
the factory. U
s
e of a non-approved spark lead or ribbon
cables can lead to operational problems
which could
result in
n
o
n
-r
epa
i
r
ab
l
e
d
a
m
a
g
e
t
o
t
h
e
i
n
t
e
g
r
a
t
e
d
c
o
n
t
r
o
ll
e
r
o
r
o
t
he
r
c
o
m
p
on
en
t
s
.
3
.
A
c
t
u
a
l
c
on
ne
c
t
o
r
b
l
o
ck
l
o
c
a
t
i
on
s
m
a
y
v
a
r
y
f
r
o
m
t
h
o
s
e
s
h
o
w
n
on
d
i
a
g
r
a
m
s
.
R
e
f
e
r
t
o
a
c
t
u
a
l
c
o
m
po
n
e
n
t
s
f
o
r
p
r
op
e
r
c
o
n
n
e
c
t
o
r
b
l
o
c
k
l
o
c
a
t
i
o
n
s
w
h
e
n
u
s
i
n
g
d
i
ag
r
a
m
s
t
o
t
r
o
u
b
l
e
s
h
o
o
t
u
n
i
t
.
L
A
DD
E
R
D
I
A
G
R
A
M
L
B
L2
0
2
81
R
EV
A
USB
INTERFACE
"X
5
"
BLOCK WIRING
IS MODEL
DEPE
NDANT
X8-1
X8-5
12 Diagrams
Figure 12-1 Ladder Diagram

Lochinvar CREST 2.5 Specifications

General

Brand	Lochinvar
Model	CREST 2.5
Category	Boiler
Language	English