S9V2-SVX001-1A-EN
39
Orifice Twist Drill
Size If Installed at
Sea Level
Altitude Above Sea Level
and Orifice Required at Other Elevations
2000 3000 4000 5000 6000 7000 8000 9000 10000
42 42 43 43 43 44 44 45 46 47
43 44 44 44 45 45 46 47 47 48
44 45 45 45 46 47 47 48 48 50
45 46 47 47 47 48 48 49 49 50
46 47 47 47 48 48 49 49 50 51
47 48 48 49 49 49 50 50 51 52
54 54 55 55 55 55 55 56 56 56
55 55 55 55 56 56 56 56 56 57
56 56 56 57 57 57 58 59 59 60
57 58 59 59 60 60 61 62 63 63
58 59 60 60 61 62 62 63 63 64
From National Fuel Gas Code — Table E.1.1(d)
General Venting
FURNACE EXHAUST MUST BE VENTED TO THE
OUTDOORS. THESE FURNACES ARE INDUCED DRAFT
VENTED AND MUST NNOOTT BE CONNECTED TO ANY
VENT SERVING ANOTHER APPLIANCE. PLEASE NOTE
THAT THESE FURNACES USE PPOOSSIITTIIVVEE--PPRREESSSSUURREE
VENT SYSTEMS.
Proper venting is essential to obtain maximum
efficiency from a condensing Furnace. Proper
installation of the vent system is necessary to assure
drainage of the condensate and prevent deterioration
of the vent system.
ETL has certified the design of condensing Furnaces for
a minimum of 0" clearance from combustible materials
to single wall plastic vent pipe.
The recommended system is assembled from 2" or 3"
plastic pipe and fittings found in the Approved Vent
Pipe Materials Table. Where the system is routed to the
outdoors through an existing masonry chimney
containing flue products from another gas appliance,
or where required by local codes, then 3" venting of
Type 29- 4C stainless steel must be used in place of
PVC material.
These Furnaces have been classified as CATEGORY IV
Furnaces in accordance with ANSI Z21.47 “latest
edition” standards. Category IV Furnaces operate with
positive vent pressure and with a vent gas temperature
less than 140°F above the dewpoint. These conditions
require special venting systems, which must be gas
tight and water tight.
NNoottee:: When an existing Furnace is removed from a
venting system serving other gas appliances, the
venting system is likely to be too large to
properly vent the remaining attached appliances.
IImmppoorrttaanntt:: These Furnaces may be installed as Direct
Vent (sealed combustion) or as Nondirect
Vent (single pipe). The Furnaces are
shipped DIRECT VENT with sealed
combustion.
IImmppoorrttaanntt:: Products installed in Canada must use vent
systems that are certified to the Standard
for Type BH Gas Venting Systems (ULC
S636) for Class II-A venting systems (up to
65°C). Components of the vent system
must not be interchanged with other vent
systems or unlisted pipe or fittings. Plastic
components, specified primers, and glues
must be from a single system manufacturer
and not intermixed with other system
manufacturer's vent system parts. In
addition, the first three feet of the vent pipe
must be visible for inspection.
WWhheenn tthhee vveenntt ppiippee iiss eexxppoosseedd ttoo tteemmppeerraattuurreess
bbeellooww ffrreeeezziinngg,, ee..gg..,, wwhheenn iitt ppaasssseess tthhrroouugghh
uunnhheeaatteedd ssppaacceess,, eettcc..,, tthhee ppiippee mmuusstt bbee iinnssuullaatteedd
wwiitthh 11//22 iinncchh ((1122..77 mmmm)) tthhiicckk AArrmmaafflleexx--ttyyppee
iinnssuullaattiioonn oorr eeqquuaall..
IIff tthhee ssppaaccee iiss hheeaatteedd ssuuffffiicciieennttllyy ttoo pprreevveenntt
ffrreeeezziinngg,, tthheenn tthhee iinnssuullaattiioonn wwiillll nnoott bbee rreeqquuiirreedd.. IIff
ddoommeessttiicc wwaatteerr ppiippeess aarree nnoott pprrootteecctteedd ffrroomm
ffrreeeezziinngg tthheenn tthhee ssppaaccee mmeeeettss tthhee ccoonnddiittiioonn ooff aa
hheeaatteedd ssppaaccee..
FFuurrnnaaccee GGeenneerraall IInnssttaallllaattiioonn
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