POTTERTON COMMERCIAL PRODUCTS DIVISION
SECTION 6
INSTALLATION, OPERATION & MAINTENANCE MANUAL
PAGE 29
NXR4
L
N
D
G
X
N
L1
K
R
Y
T7
T6
S3
B4
T2
T1
L
N
Q3
N
Q1
B5
T8
L
N
N
NO
C
NF
NO
C
NF
Q3
Q1
F1
E1
N
L
F4
K4
F5
K5
SEQUENCE CONT
ROL
X4
X1
X2
X3
2
ND
STA
G
E
1
ST
STAG
E
BURNER CABLES
X5
MAINS FOR EXTERNAL
C
O
NT
RO
LS
i.
e.
PU
M
P
S
X6
BURNER
SAFETY
O
VERHEAT
KA2
KA1
CON
T
R
O
L
PANEL
OUTE
R
CASING
HINGE
D
FRO
N
T
ZP
ZT
ZB
F1
6.3 AMP
MST
VSC
STB
VMB2
TR2
VSB
VMB1
TR1
VO
LT-FREE
REMOTE I
NDICA
TION
CH1
CH2
HOU
R
S RUN KIT
Fig.19 – Boiler Wiring Diagram
Q3
Q1
F1
E1
N
L
F4
K4
F5
K5
Power Suppl
y
Summary of Contents for NXR4
Page 1: ...NOVEMBER 2003 heating specialists ...
Page 38: ...NOTES ...