KNIGHT® BOILER PRODUCT SUMMARY
(KB) 399,000 - 800,000 BTU/HR
KB-399
KB-500
KB-600
KB-700
KB-800
WATER
GALLON CAPACITY
3.4
41.8
1-1/2”
3/4”
37
4.2
50.8
1-1/2”
3/4”
47
4.2
50.8
2"
5.0
57.8
2"
5.7
65.3
2"
HEATING SURFACE (SQ. FT.)
WATER CONNECTIONS
DRAIN
3/4"
55
3/4"
65
3/4"
74
20°F ΔT WATER FLOW (GPM)
HEAD LOSS (FT. OF HD.)
35°F ΔT WATER FLOW (GPM)
HEAD LOSS (FT. OF HD.)
MAX. WORKING PRESSURE (PSI)
# OF RELIEF VALVES
21
23
31
30
33
21
26
32
37
42
8
10
13
11
12
160
1
160
1
160
1
160
1
160
1
RELIEF VALVE SIZE
3/4”
697
50
3/4”
697
50
3/4"
697
50
3/4"
1,352
50
3/4"
1,352
50
RELIEF VALVE RATING (MBH)
RELIEF VALVE PRESSURE RATING (PSI)
GAS
INLET CONNECTION
1”
1”
1"
1"
1"
MAX. INLET PRESSURE, NAT
MIN. INLET PRESSURE, NAT
MAX. INLET PRESSURE, LP
MIN. INLET PRESSURE, LP
BTU/HR INPUT
10.5” w.c.
4.0” w.c.
13.0” w.c.
8.0” w.c.
399,000
372,267
74,453
10.5” w.c.
4.0” w.c.
13.0” w.c.
8.0” w.c.
500,000
466,500
93,300
10.5” w.c.
4.0” w.c.
13.0” w.c.
8.0” w.c.
600,000
567,600
113,520
10.5” w.c.
4.0” w.c.
13.0” w.c.
8.0” w.c.
700,000
660,100
132,020
10.5” w.c.
4.0” w.c.
13.0” w.c.
8.0” w.c.
800,000
752,000
150,400
BTU/HR OUTPUT (HIGH FIRE)
BTU/HR OUTPUT (LOW FIRE)
ELECTRICAL
VOLTAGE/HEATER
VOLTAGE/CONTROL
TOTAL AMPS
120
24
1.5
1
120
24
1.7
1
120
24
2.7
1
120
24
2.7
1
120
24
2.7
1
# OF ELECTRICAL CONNECTIONS
DIMENSIONS
HEIGHT
42-1/2”
15-1/2”
27”
42-1/2”
15-1/2”
31-1/4”
42-1/2"
15-1/2"
36-1/4"
42-1/2”
15-1/2"
40-1/4"
42-1/2”
15-1/2"
45-1/4"
WIDTH
DEPTH
SERVICE CLEARANCES
FRONT
24”
14”
0”
24”
14”
0”
24”
14”
0”
24”
14”
0”
24”
14”
0”
BACK
RIGHT SIDE
LEFT SIDE (PIPING)
TOP
24”
24”
24”
24”
24”
24”
24”
24”
24”
24”
DIRECT VENTING
SIZE
4”
4”
4"
6"
6"
VENT CATEGORY
VENT MATERIAL
IV
PVC
IV
PVC
IV
PVC
IV
PVC
IV
PVC
Lochinvar Corporation • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: 615-547-1000
KBX-PS-03 (Replaces KBX-PS-02 06/08)
06/08-Printed in U.S.A.
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