11
11/13/09 - XXXX-XXXX R0
GT 220A
.
0.12 Optional Panel - Burner wiring with BMS
Application wiring: Example burner wiring 2 stage (L-H-L)
operation, main power provided to panel then to burner.
ALL WIRING BETWEEN BURNER AND PANEL AS SHOWN
INSTALLED BY OTHERS
1. Main power disconnect fuse 15A max
2. Service switch (located near boiler in an accessible location)
3. Low water cutoff control (2 possible wiring connections)
4. Vent safety device installed on venting
5. Optional instead of vent safety device a jumper can be installed
between 6-7 if the burner is equipped with a high gas or over
pressure switch (manual reset) power disconnect fuse 15A max
Wiring does not show burner motor connections or additional bur-
ner wiring required. 2 stage operation requires a 2 stage firing relay
as shown in the diagram, this firing relay is sold as an option and is
not provided with the standard panel, unless specifically ordered.
MAN/AUTO/STB Switch
MAN = Position for the basic panel operation.
STB = Testing safety (fixed Hi-limit)
AUTO = Position remote BMS operation
BMS or Digital Control Sensor Wiring
4
5
6
7
10
11
8
13
14
12
16
15
19
17
21
20
25
28
29
27
31
30
33
34
32
36
35
38
37
Thermostat
(Optional)
TS
2
3
1
(1)
AUTO
(1a) STB
(1b)MAN
T
CH1
TCH2
ZSTB
ZG
DJ10A
In
te
rnal
W
ir
in
g
–
B
y F
actor
y Do
no
t Mod
ify
D
e
Di
etri
ch Co
ntro
l Panel
s
S2NA
(ME50) =
G
T
120-220
A Seri
es
bo
il
ers
S3NA (MD5) =
G
T
330
-430-530A Serie
s
(2
)
AUT
O
(2a) STB
(2b)
MAN
9
22
23
24
26
18
ZP
(2a)
AU
TO
(1a)
AU
TO
(2b)
MA
N
(1b)
MA
N
(2) OFF
(1) OFF
N
L
AC Supply
120/60/1 – 15A Max
3
2
1
120/60/1
Main Power Supply
CS – Safety
Contact 120v
Burner Connections
Heating
Pump
DHW
Pump
120/24v
Transformer
BMS or Digital Control Wiring
1
st
Stage
2
nd
stage
Gnd
N
Only used with Optional
BMS & Digital Control
L
1
2
3
4
4
X
= Burner terminals - not all
terminal designations shown
3*
BMS (Remote)
x
x
L
N
N
L
x
x
x
x
x
x
All contact must be (dry)
Operator (Limit)
1 stage control
Operator (Limit)
2 stage control
Heating
Pump Control
DHW Pump
Control
Open terminals
N
GND
X X
k1
X X
Limit circuit
(Operator)
2
nd
stage
Limit circuit
(Operator)
Panel Internal Wiring Legend
symbol
Description
ZG main power switch
Earth Ground
DJ 10A Fuse breaker
TS – Safety limit (SPDT) manual reset
Panel wire terminals
ZSTB switch Man/Auto/STB
TCH1 – 1
st
stage or
limit control
TCH2 – Aux Limit or 2
nd
stage Limit (optional usage)
ZP – Aux (pump) switch AUTO/OFF/MAN
1
Common connection
All wiring min 18awg. (16 strd) type
CSA TEW or UL1015 (rated for at least 300v - 90°C)
All panels to be earth leakage test (Di-electric) and function tested
All components North American approved (see material listing)
Factory wiring Line
(Hot or L1)
Factory wiring Neutral
(N or L2)
Blocked vent safety interlock
(jumper if burner equipped)
ZSTB
switch
ZP
AUTO
MAN
STB
OFF
MAN
AUTO
ATTENTION – WARNING
FAILURE TO FOLLOWING THIS WIRING DIAGRAM MAY RESULT IN PROPERTY
DAMAGE OR PERSONAL INJURY INCLUDING DEATH.
Wiring must be in strict compliance with CSA C22.2 and NEC/NFPA 70.
All wiring shown supplied and wired by others.
Panel 2
nd
Stage output used 2-stage limit control or as a auxiliary limit works with the
1
st
limit.
This equipment must be earth bonded or grounded.
All wiring (field or replacement) must be min 18AWG type CSA TEW/ UL 1015 rated
300v - 90°C minimum.
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.
