Dunkirk Q90-50 - Page 27

Figure 18
SAFETY RELIEF
VALVE SEE
PAGE 18 FOR
REQUIREMENTS
- Combustion Air and Vent Piping - Boiler Connections
2" COMBUSTION A_R
iNTAKE P_PING
2" CPVC VENT PIPING
2" CPVC COUPLING
(
VENT / iNTAKE
TERMiNATiONS
5 _
1_52m
2" (50.8mm) Diameter Vent And Combustion
Air Intake Piping
- 21 ft (6.4m)maximum total equivalent length
for 90-100 models
-26 ft (7.9m) maximum total equivalent length
for 90-50 and -90-75 models
- 2 ft (0.6m) minimum total equivalent length
for all models
EXHAUST ELBOW
FURNISHED)
VENT f _NTAKE
3" COMBUSTION AIR
INTAKE PIPING
SAFETY RELIEF
VALVE SEE 2'_cPvcVENTPIP!NG
PAGE 18 FOR
REQUIREMENTS 2_cPvcCOUPLING
TRANSITION F_TTING
2"_TO 3"_IN
VERTICAL RUN
TRANSiTiON FI_NG
2°_ TO3"_ _N
VERTICAL RUN
EXHAUST ELBOW
TRANSITION FITTING
2" (50.8mm) Q to 3" (76.2mm)
® IN VERTICAL RUN
3" (76.2mm) Diameter Vent And Combustion
Air Intake Piping
- 92 ft (28m) maximum total equivalent length
for 90-100 models
- 15 ft (4.6m) minimum total equivalent length
for 90-100 models
- 112 ft (34m) maximum total equivalent
length for 90-50 and 90-75 models
- 20 ft. (6m) minimum total equivalent length
for 90-50 and 90-75 models