3
Height 2
Height
Height 1
Total width
Total depth
Depth
15
3
⁄
4
"/400mm
32
1
⁄
2
"/830mm
50
1
⁄
2
"/1284mm
52
1
⁄
2
"/1335mm
4
1
⁄
2
"/
110mm
19"/481 mm
FGC
BWS
GC2
GC1
BWR
PRV
PC
BD
Boiler Model
Model No.
RS-8
RS-11
RS-14
CSA input
full load *1
MBH
550
800
1050
kW
161
234
308
partial load *2
MBH
372
541
710
kW
109
158
208
CSA output
full load *1
MBH
468
680
893
kW
137
199
261
partial load *2
MBH
316
460
604
kW
93
135
177
Combustion efficiency
%
85.0
85.0
85.0
Heat exchanger
ft
2
99.47
140.63
181.79
surface area
m
2
9.2
13.1
16.9
Cast-iron sections
8
11
14
Burners
7
10
13
Manifold pressure
Natural gas
full load
"w.c.
3.5
3.5
3.5
partial load *3
"w.c.
1.3
1.3
1.3
Propane gas
full load
"w.c.
10
10
10
partial load *3
"w.c.
Man. gas supply pressure *4
"w.c.
14
14
14
Dimensions
Depth
inches
34
3
⁄
4
34
3
⁄
4
34
3
⁄
4
mm
883
883
883
Width
inches
36
1
⁄
4
49
1
⁄
2
69
1
⁄
4
mm
921
1255
1582
Height
inches
53
3
⁄
4
53
3
⁄
4
53
3
⁄
4
mm
1366
1366
1366
Boiler Model
Model No.
RS-8
RS-11
RS-14
Overall dimensions
Total depth
inches
47
47
47
mm
1195
1195
1195
Total width
inches
36
1
⁄
4
49
1
⁄
2
62
1
⁄
4
mm
921
1255
1582
Total height
Height 1 (control unit in
inches
60
1
⁄
4
60
1
⁄
4
60
1
⁄
4
position for operation)
mm
1531
1531
1531
Height 2 (control unit in
inches
73
1
⁄
2
73
1
⁄
2
73
1
⁄
2
position for servicing)
mm
1867
1867
1867
Weight, boiler with insulation,
lbs
1280
1709
2138
burners and packaging
kg
582
777
972
Boiler water content
USG
20
28
35
ltr
77
106
134
Max. operating pressure
psig
60
60
60
kPa
414
414
414
Boiler connections
Boiler supply and return
Ø"
2
2
2
(male thread)
Boiler drain
Ø"
3
⁄
4
3
⁄
4
3
⁄
4
Gas supply connection
Ø
1
1
1
⁄
4
1
1
⁄
4
(male thread)
Vent pipe collar
inches
10
12
14
250
300
350
*1 Combustion results are based on a heating system supply temperature of 167
o
F / 75
o
C, return 140
o
F / 60
o
C
*2 For two-stage boilers only
*3 Parial load manifold pressure is factory preset. Any attempt to readjust in the field will render boiler warranty null and void.
*4 If the gas supply pressure is higher than the maximum permissible value, a separate field supplied gas regulator must be
installed upstream of the boiler gas train.
For for information regarding other Viessmann System Technology componentry, please reference documentation of the
respective product.
Legend
BD
Boiler Drain
BWR Boiler Water Return
BWS Boiler Water Supply
FGC Flue Gas Collar
GC1 Main Gas Connection
GC2 Pilot Gas Connection
PC
Pilot Cover Plate
PRV Pressure Relief Valve Connection
Technical Data
