Operating instructions

Wiring Legend
L – Main Line 120v
N – Main Neutral
N – Burner Neutral
L1 – Burner Line 120v
T1 – Boiler Limit
T2 – Burner Limit
T6 – Boiler Operating Limit
T7 – Burner Low Fire – As Required
T8 – Burner Hi Fire
S3 – Optional Burner Alarm
VA – Optional Hi Temp Alarm
A1-A2 – Optional Alarm Device
[Supplied by Others]
J1-J2 – Field Supplied jumpers
ALL ELECTRICAL CONNECTIONS
MAYBE FROM MULTIPLE SOURCES
Application Note for BMS or BAS systems:
The Local-Remote switch or enable/disable forced relay,
must interrupt the TCH2 control . TheTS & TCH1 limits
must remain in the limit circuit.
WARNING – CAUTION:
Panel Wiring Options:
On-Off Control [Single stage burners]
use jumper as shown
2 Stage Control [2 Stage burners]
Remove jumper 2 install firing rate control from burner
T6 – T8
Progressive Modulating Control
[Multi-Stage burners]
Remove jumpers 1
Installed burner limit circuit between T1 & T2
Remove jumper 2
Install burner firing rate control between T6 [common]
T7 [min rate] & T8 [max rate]
Consult burner manufacturer:
All burner wiring
Modulating Signal and required Controls
Burner Motor May require additional
power source
BMS Local-Remote Control Wiring.
Flexible Eutectic Sales Ltd. [De Dietrich North America] FA 122 Panel – Boiler Controller
12 11
10 9 8 7 6
VA S3
T8 T7 T6 T2 T1
1
6
3
N
120v 60Hz.
L1
5
N
4
TCH2
2 4
C
TCH1
2 1
C
TS
1 2
C
278912 411
A1
A2
Internal
L
Burner Power
L N
Limit CircuitFiring Rate Circuit
Burner Connections
J1J2
T1T2
T6 T7 T8
10 5
L
N
Vent Safety
Device
Auxiliary Hi-
Limit [Optional]
LWCO
Service
Switch
Fused
Disconnect
Main fuse
disconnect
6A 120V max
Service Switch
[Others]
LWCO
Device
[As required]
Burner Safety
Interlock –
Optional [Others]
Wiring Symbols
Auxiliary limit –
Optional [Others]
120V Alarm
indicator [Others]
Factory Wiring
Field Wiring
[Others]
Strain Relief
[Others]
Alarm Wiring
[Others]
Jumper Wiring
[Others]
Vent Safety
Device [NC]
17
06/10/06 - 94863873 - 85534150E GT 300 A/II
Boiler Control Wiring