I N S T A L L A T I O N
Alarm
contact
Oper.
contact
Fill
Valve 1
Drain
pump
24VAC-1
Hi
li
m
it
R
H
%
sw
itc
h
Ai
r p
ro
vi
ng
sw
itc
h
24VAC-2
Hi Limit
switch
Enable
Contact
Air Flow
Switch
Analog
input
RH analog
input
O
pt
io
na
l E
na
bl
e
co
nt
ac
t
O
pt
io
na
l o
ut
si
de
p
ow
er
so
ur
ce
fo
r H
i L
im
it
O
pt
io
na
l o
ut
si
de
p
ow
er
so
ur
ce
fo
r e
na
bl
e
co
nt
ac
t
O
pt
io
na
l o
ut
sid
e
po
w
er
so
ur
ce
fo
r A
PS
Ex
te
rn
al
a
na
lo
g
si
gn
al
fo
r d
em
an
d
o
r
ex
te
rn
al
se
tp
oi
nt
si
gn
al
24
Va
c
ou
tp
ut
–
2
A
m
ax
24
Va
c
G
nd
RH
%
si
gn
al
RH%
sensor
Or Temp.
sensor
DI2
DI1
DI3
AI1
AI2
Common
Norm Open contact
Norm Close contact
Common
Norm Open contact
Norm Close contact
- +
- +
E- PCBA-001, v3.1
Main controller PCB assembly
PWM
sp
SSR
sp
Output
PT1000
2
ADC sp
PT 1000 -1
Foam
Water level
Fan
SSR
Contactor
-
+
RH%
sensor
Op onal Duct RH% sensor
for propor onal Hi lImit
Op onal propor onal output feedback
analog signal
+ -
RS485
A+
B-
+ -
AI3
Gnd
BACnet or
Modbus
Figure 42, Control connec ons
Admissible control signal
Control
Admissible signals
External analog signal for demand
0-10Vdc, 2-10Vdc, 4-20mA
On-Off external signal
Dry contact
Propor onal RH% or temperature sensor 0-10Vdc, 2-10Vdc, 4-20mA
Remote BAS control
Modbus (supplied standard) – refer to Modbus tables
BACnet MS/TP (op onal) – refer to BACnet PICS
Installation steps :
1. Ensure that the safety contact for Air proving switch and Hi limit humidistat are connected
to the terminals 4 and 5.
2. Connect the applicable controls according to the above wiring diagram
3. Selec on of control signal is done through set-up screens once the
IER
will be powered.
31
Summary of Contents for steamOvap
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