Service manual

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 81114
Burners 71013
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"222
(male thread)
Boiler drain Ø"
3
⁄4
3
⁄4
3
⁄4
Gas supply connection Ø 11
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