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KNIGHT 399
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Lochinvar KNIGHT 399 User Manual Page 48
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Installation & Operation Manual
48
8
Field wiring
AU
X. D
EVIC
E
PILOT SUPPL
Y
24V
A
C
GND
AU
X. D
EVIC
E
PROVING
GAS PRESSURE
SWITCH
FLOW
SWITCH
A
LARM
CONT
A
C
TS
RU
NTIME
CONT
A
C
TS
SYSTEM
SENSOR
DH
W T
AN
K
SENSOR
OUTDOOR
SENSOR
SH
IELD
GROU
ND
0-10VDC
EXTERNA
L
G
ND
C
ONT
ROL
DH
W T
HER
MOS
T
A
T
R
W
RO
OM T
HER
MOS
T
A
T /
ZONE CO
NTROL
A
B
SH
IELD
GROU
ND
SEQUENCI
NG
LOW W
ATE
R
CUTOFF
CN1
CN2
CN3
CN4
CN5
C
NO
NC
C
NO
NC
AUX. D
EVICE
RELA
Y
HIGH GAS
PRESSURE SWITCH
(500 ONL
Y)
LOW
GAS
PRESSURE SWITCH
(500 O
NL
Y)
FLOW
SW
ITC
H
T
ANK THERMOST
A
T
WALL THERM
OST
A
T
/
ZONE CONT
ROL
SYSTEM SUPPL
Y
SENSOR
OUTDOOR SENSOR
BUILDING
MANAGME
NT
SYSTEM
AUX. D
EVICE
PROVING SW
ITCH
COM
NO
A
A
B
A
B
SHIELD
SHIELD
FROM
PREVIOUS
BOILER
TO
NEXT
BOILER
(AUX
) DHW
SENSOR
LOW
WA
TER
CUTOFF
Figure 8-3
Low V
oltage Field Wiring Connections
1
2
...
43
44
45
46
47
48
49
50
51
52
53
...
75
76
Models: 399 - 800
1
Contents
2
Hazard definitions
2
Please read before proceeding
3
Model 399
5
Model 500
6
Models 600 - 800
6
Knight XL Boiler
7
I=B=R Rating
7
Other Specifications
7
ALCOVE INSTALLATION
9
1 Determine boiler location
10
(continued)
11
2 Prepare boiler
13
3 General venting
15
General venting (continued)
17
4 Sidewall direct venting
23
Prepare wall penetrations
25
Description and usage
27
5 Vertical direct venting
30
Prepare roof penetrations
31
Termination and fittings
31
"A"
33
6 Hydronic piping
34
Hydronic piping (continued)
35
7 Gas connections
41
Gas connections (continued)
43
8 Field wiring
45
8 Field wiring (continued)
47
9 Condensate disposal
49
10 Start-up
50
10 Start-up (continued)
51
11 Operating information
56
Protection features
57
Cascade (continued)
59
Figure 11-1 Control Panel
61
Status Display Screens
63
12 Maintenance
67
12 Maintenance (continued)
69
13 Diagrams
72
13 Diagrams (continued)
73
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