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GT 530A DDR_G30A/AE _IO_V4.0 09/2013
66
GT 530ADDRA 001 v1.0 06/2010
S2NA (ME50) or S3NA (MD5) Temperature control panel (Field Wiring Diagram) Internal Wiring by DDR
Riello or Wieshaupt Burner Typical Panel Wiring Application 2-Stage (L-H-L) Operation
WARNING
FAILURE TO FOLLOWING THIS WIRING
DIAGRAM MAYRESULT IN PROPERTY
DAMAGE OR PERSONAL INJURY INCLUDING
DEATH. Wiring must be in strict compliance
with CSA C22.2 and NEC/NFPA 70. All
wiringshown supplied and wired by others.
Optional 2nd stage relay supplied by others
or ordered loose, relay can be mounted in
panel or directly on burner.
This equipment must be earth bonded or
grounded. All wiring (eld or replacement)
must be min 18AWG type CSA TEW/
UL 1015 rated 105°C or an approved
equivalent. All wiring and panels must be
shielded from spray or ingestion of water.
Any portion of the control which has been
subject to spray or ingestion of water, the
entire control must be replaced It is the
responsibility of the installer/owner to
verify the controls are functioning correctly
and are adjusted correctly. Suitable wire
protection and strain relief’s are required
(upstream & downstream) of the control
panel. Line voltage wiring and low voltage
sensor wiring must use separate wire
conduits.
LABEL ALL WIRES PRIOR TO
DISCONNECTING THEM FOR SERVICE.
Field wiring shown (By Others)
1 2 3
4
5 6
7
9 10
11
8 13 14
12
16
15
18 1917
21
20 23
24
22 2625 28 29
27
3130
33
3432 3635 38
37
120/60/1
Main Power Supply
Optional
thermostat TT
connection
CS – Safety
Contact 120v
1
st
Stage
2
nd
stage
N Gnd
Heating
Pump
Relay
L
N X
X
Limit Circuit
X X
2
nd
stage
controller
Burner Connections
L
N
Burner main
power
DHW
Pump
120/24v
Transformer
Burner Connections
Main Power 120/60/1
Field wiring shown
(By Others)
External Controller External control sensor wiring
Optional field wiring
terminals for
external control
Terminals for Optional Digital Control
or external control
1
2
3
4
5 6
1
2
3
4
5
6
Field Wiring Callout Notes
Fuse disconnect 15A Max.
Service Switch
Low water cut-off control
External Limit (Optional)E xternal Start/Run Interlock (Optional)
X
= Terminal designation
consult burner wiring
diagram or manufacturer
Vent Safety Switch, unless burner is
equipped with High gas or Pressure switch
Burner motor power supply may be from seperate disconnect if power
exceed 120V ±10% - 10A @ 60Hz. Or is multi-phase
66


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