55
Installation & Operation Manual
8
Field wiring
(continued)
LO
U
V
ER
R
E
LAY
FLOW
SW
ITC
H
T
A
NK T
H
ERM
O
ST
A
T
HEAT
/
LO
OP
DE
M
A
N
D
3
SY
ST
EM SU
PPLY
SEN
S
O
R
BUILDING
MA
N
A
G
E
ME
NT
SY
ST
EM
LOU
VER
PR
OVI
N
G SW
IT
C
H
CO
M
NO
L
O
W WA
T
E
R
CU
T
O
F
F
OU
T
D
OO
R SEN
S
O
R
T
A
NK SEN
S
O
R
SH
IEL
D
SHIELD
TO
NE
X
T
BOILER
A B
A B
FR
OM
PREVIOU
S
BOILER
NOT
E
:
CONNE
CT
ION BOA
RD S
P
L
IT
F
O
R
IL
L
U
S
T
RA
T
ION PURP
O
S
E
S
WI
R
E
A
S
NEEDE
D
SY
ST
EM PUMP
SPEED CO
NTRO
L
BO
ILER PUMP
A
B
HEAT
/
LO
OP
DE
M
A
N
D
2
HEAT
/
LO
OP
DEM
A
N
D
1
Figure 8-4 Low Voltage Field Wiring Connections