Com Bust Ion Air And Vent Piping; General - ECR International COMBI 115 Installation, Operation And Maintenance Manual

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W ARN I N G
Fire, explosion, and asphyxiat ion hazard. I m proper
inst allat ion could result in deat h or serious
inj ury. Read t hese inst ruct ions and underst and all
requirem ent s before beginning inst allat ion.
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W ARN I N G
ABS vent ing shall not t o be used t his product . Use of
Use of cellular core PVC ( ASTM F891) , cellular core
CPVC, or Radel® ( polyphenol sulfone) in vent ing
syst em s shall be prohibit ed.
Covering non-metallic vent pipe and fittings with
t herm al insulat ion shall be prohibit ed.
Failure t o follow t hese inst ruct ions could result in
deat h or serious inj ury.
Follow vent ing m anufact urer's equivalent lengt hs
N o t e
for specialty fittings.
5 .1 Genera l
• I nst allat ions shall com ply wit h Aut horit y having j urisdict ion
and in absence of such wit h:
» U.S. ANSI Z223.1 / NFPA 54 in t he Unit ed St at es
» CSA B149.1 in Canada.
• This boiler requires a dedicat ed direct vent syst em .
• Vent connect ions serving appliances vent ed by nat ural draft
shall not be connect ed int o any port ion of m echanical draft
syst em s operat ing under posit ive pressure.
• Use only m anufact urer approved vent ing m at erials or
vent ing m at erials prim er and glue approved t o: ULC S636
in Canada, and UL 1738, or ASTM D1784 and D2665 in t he
U.S.
• Mat erials used in t he U.S. shall com ply wit h Aut horit y
having j urisdict ion and in absence of such wit h: ANSI / ASTM
D1785, ANSI / ASTM F441, ANSI / ASTM F493.
• For facilities in Canada only: the first three feet (0.9 m) of
plast ic vent s, from t he locat ion where t he exhaust exit s t he
boiler, m ust be easily accessible for visual inspect ion.
• Vent syst em m ust have unrest rict ed m ovem ent t hrough
walls, ceilings and roof penet rat ions.
• Check for proper j oint const ruct ion when j oining pipe t o
fittings.
• If vent is penetrating ceilings and floors, openings must
have means of fire stopping in joist areas and proper fire-
st op spacer assem blies inst alled.
• Standard roof flashing methods must be used to install roof
flashing.
• Fram e wall and roof openings t o provide support for
at t achm ent of t erm inat ion assem blies.
5 - COM BU STI ON AI R AN D V EN T PI PI N G
• Support piping in accordance wit h pipe m anufact urer's
inst ruct ion and aut horit y having j urisdict ion. I n absence
of m anufact urer's inst ruct ion use pipe hooks, pipe st raps,
bracket s, or hangers of adequat e and st rengt h locat ed
at int ervals of 3 ft . ( 1.m ) or less. Allow for expansion/
cont ract ion of pipe.
• Vent ing shall be support ed adj acent t o each j oint using
st eel st rapping or equivalent . See Figure 5- 1.
• Boiler shall not support any port ion of vent ing syst em .
• Support horizont al sect ions of vent pipe t o prevent sags
capable of accum ulat ing condensat e.
• Assem ble vent m at erials in accordance wit h vent ing
m anufact urer's inst ruct ions.
• Slope exhaust pipe m inim um of 1/ 4" per foot , or vent
m anufact urer's recom m endat ion, whichever is great er;
back t oward t he boiler.
• Any "in line" elbows in flue system must be taken into
considerat ion. First elbow on t he t op of t he boiler is
included in equivalent lengt h calculat ions.
• Use U.V. st abilized polypropylene when it will be exposed
t o sunlight , wind, or prone t o freeze ups.
• Check for proper j oint const ruct ion when j oining pipe t o
fittings.
• Manufact urer requires use of an approved m echanical
fast ener, which m ay vary per vent pipe m anufact urer, at
every push-fit gasket connection when using a single wall
polypropylene vent syst em .
• Refer to specific vent manufacturer's manual for additional
support .
Figure 5 - 1 - Vent ing Support
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240013687 REV A [ 09/ 01/ 2022]