Exodraft EHC20, Mounting, Installation And Operating Manual

Page: 42 / 72

42 • Connection diagrams
3110086 EHC20 UK 110515
O.9 Program 6.1.1. Heat exchanger with VFS sensor for power measurement.
Project:
Drawing Date:
Rev. Date: Rev.:
Title:
Ref.:
Smoke gas temperature Forward flow
temperature
Storage tank
temperature
Drawing N°:
3110082
EHC20 System 6.1.1
TFI A
26-09-13
Te
m
p.
Fl
ow
0V +5
V
Temperature sensor input
8
V
FS
2
sensors
V
FS
1
sensors
M
ai
ns
0-
10
V
output
0-
10
V
output
exodraft EHC10/EHC20 controller
P
F relay
Relay output
6
Relay output
1
RC
plugs
C
A
N
C
A
N
Temperature sensor input
7
Temperature sensor input
6
Temperature sensor input
5
Temperature sensor input
4
Temperature sensor input
3
Temperature sensor input
2
Temperature sensor input
1
Relay output
5
Relay output
4
Relay output
3
Relay output
2
Pump VFS-Sensor
1 1 1 1 1 2 2 2 2 2 3 3 3 4 4 4 5
C GND GND GND GND GND GND GND GND GND GND
L
N N N
N
N N N NC NO
PE
PE
PE
PE
PE
PE
PE
PE
R1 R2 R3 R4 R5 R6 S1 S2 S3 S4 S5 S6 S7 S8 V1 V2
1 1 1 1 1 2 2 2 2 2 3 3 3 4 4 4 5
C GND GND GND GND GND GND GND GND GND GND
L
N N N
N
N N N NC NO
PE
PE
PE
PE
PE
PE
PE
PE
R1 R2 R3 R4 R5 R6 S1 S2 S3 S4 S5 S6 S7 S8 V1 V2
0-
10
V
G
ND
/0
V
L N PE
0-
10
V
G
ND
/0
V
L N PE
1 2 3 4 1 2 3 4
U
-S3
U
-S3
U
-S8
L1
N
P
E
This diagram shows the following system:
Heat exchanger with bypass damper. Two storage tanks, a mixer, a 3-way valve and a circulator pump.
The S8 temperature sensor must be positioned in the heat exchanger inlet.
The S3 temperature sensor must be mounted on the forward flow pipe immediately after the heat exchanger.
The S1 temperature sensor must be mounted in storage tank #1.
VFS sensor
Important:
An STL thermostat which turns off the burner must be mounted on the forward flow pipe. The forward flow
temperature must not exceed 100°C.