67
GT 530A
DDR_G30A/AE _IO_V4.0 09/2013
67
GT 530A
DDRA 001 v1.0 06/2010
S2NA (ME50) or S3NA (MD5) T
emper
ature control panel (Field Wiring Diagr
am)
Internal wiring b
y DDR
-De Dietrich F
actory
1
2
3
4
5
6
7
9
10
11
8
13
14
12
16
15
18
19
17
21
20
23
24
22
26
25
28
29
27
31
30
33
34
32
36
35
38
37
120/60/
1
Main Power Suppl
y
Optional
thermostat TT
connection
CS –
Safety
Contact 120
v
1
st
Stag
e
2
nd
stag
e
N
Gn
d
Heating
Pump
Rela
y
L
N
X
X
Limit Circuit
X
X
2
nd
stage
controlle
r
Burner Connections
L
N
Burner main
powe
r
DH
W
Pump
120/24
v
Transformer
Burner Connections
Main Power 120/60/1
External Controller
External control sensor wiring
Optional
field wiring
terminals for
external control
Terminals for Optional Digital Contro
l
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 contro
l
External Limit (Optional
)E
xternal Start/Run Interlock (Optional)
X
= Terminal designation consult burner wiring di
ag
ra
m or manufacture
r
Vent Safety Switch, unless burner is equipped with High gas or Pressure switc
h
Burner motor power supply may be from seperate disconnect if power
exceed 120V ±10% -
10A @ 60Hz. Or is multi-phas
e
WARNING
FAILURE T
O FOLL
OWING THIS WIRING
DIAGRAM MA
YRESUL
T IN PROPER
TY DAMAGE
OR PERSONAL INJUR
Y INCLUDING DEA
TH.
Wiring must be in strict compliance with CS
A
C22.2 and NEC/NFP
A 70. All wiringshown
supplied and wired b
y others. Optional 2
nd
stage rela
y supplied b
y others or ordered
loose, rela
y can be mounted in panel or
directly on burner
.
This equipment must be earth bonded or
grounded.All wiring (field or replacement) must be min 18A
WG t
ype CS
A TEW/ UL 1015
rated 105°C or an appro
ved equiv
alent. All
wiring and panels must be shielded from spr
ay
or ingestion of w
ater
. An
y portion of the control
which has been subject to spr
ay or ingestion
of w
ater
, the entire control must be replaced.
It is the responsibilit
y of the installer/owner to
verif
y the controls are functioning correctly and
are adjusted correctly
.Suitable wire protection
and str
ain relief
’s are required (upstream &
downstream) of the control panel. Line v
oltage
wiring and low v
oltage sensor wiring must use
separ
ate wire conduits.
LABEL ALL WIRES PRIOR T
O DISCONNECTING
THEM FOR SERVICE.
Field wiring shown (By Others)