W415-1013 / B / 07.24.13
40
EN
Whether the flue from the HMF150/200 wood furnace has a dedicated chimney or it shares a chimney already
in place for an existing oil fired furnace the following conditions apply:
○
The use of incline manual dampers are forbidden.
○
barometric dampers will be installed where stack pressures exceed -0.06” w.c. (-15 Pa) but shall
not prevent a minimum of -0.04” w.c. (-10 Pa) for the chimney draft of the wood furnace.
○
The use of incline manual dampers are forbidden.
IMpoRTANT:
○
The warm air supply duct system shall be constructed of metal in accordance with nfPa 90b, 2-1.1.
○
The plenums installed to the furnace shall be constructed of metal in accordance with nfPa 90b, 2-1.3.
using a manometer with appropriate scale range connect testing tube between manometer and chimney
connector. end of testing tube should be inserted in chimney connector so approximately 1” (25mm) of tube
protrudes into and perpendicular to exhaust stream. This measurement shall be taken approximately 12”
(305mm) above elbow/T attached to the furnace flue. Any hole made in the chimney connector for insertion of
manometer tube shall be adequately sealed with high temp materials when testing is complete.
Separate chimneys are recommended when connecting the Hmf150/200 to a pre existing oil furnace. if a
single chimney is used in this application it must be 7" (178mm) in diameter and approved for use with wood
burning appliances (2100°f) (1149°C).
○ The exhaust pipe from the wood flue must connect to the chimney below the junction of the oil
exhaust to the common chimney.
Separate chimneys are required when connecting the Hmf150/200 to a pre existing natural gas or propane
furnace.
6.4 FLuE CONFIGurATION FOr "Add ON" FurNACE CONFIGurATION
6.4.1 CONTrOLLING drAFT
6.4.2 mEASurING drAFT
6.5 CONNECTING duCTwOrk/PLENumS BETwEEN “Add ON” FurNACE ANd
OrIGINAL FurNACE
H3.57
unDeR nO cOnDItIOns MaY a sOlID Fuel BuRnIng applIance sHaRe a cHIMneY tHat
vENTS NATURAL gAS oR pRopANE ExhAUST.
DO nOt use MakesHIFt cOMpROMIses DuRIng InstallatIOn. DO nOt BlOck OR RestRIct
aIR. DO nOt IMpeDe aIR MOveMent zOnes MaRkeD “cleaRance tO cOMBustIBles”.
all plenuM DuctIng anD ventIng InstallatIOn Must cOnFORM WItH can/csa B365-01,
csa B139-09, anD nFpa 211. alWaYs cHeck lOcal BuIlDIng anD FIRe cODes , anD autHORI-
TIES hAvINg jURISdICTIoN.
h3.58
cHIMneY DRaFt gReateR tHan -0.06" W.c. (-15 p
a)
MaY cause an uncOntROllaBle FIRe
ANd dAMAgE ThE FURNACE.
h3.59
use eXtReMe cautIOn WHen BuIlDIng plenuM/Duct WORk sYsteMs sO as nOt tO cReate
a cOnDItIOn WHeRe HOt aIR can Be entRappeD In Duct WORk, OR cReatIng a ReveRse
FlOW cOnDItIOn. WHeRe HOt aIR WOulD FlOW BackWaRDs IntO tHe cOlD aIR RetuRn
pLENUM ANd dUCTINg.
neveR cOnnect tHe WaRM aIR supplY Outlet OF tHe “aDD On” FuRnace tO tHe cOlD aIR
SUppLy oF ThE CENTRAL (oRIgINAL) FURNACE. FAILURE To CoMpLy MAy RESULT IN dAMAgE
To pRopERTy ANd CREATE A FIRE hAZARd.
FOR MORe InFORMatIOn On allOWaBle/pROHIBIteD MetHODs OF cOnnectIng "aDD On"
FuRnaces tO a pRe eXIstIng FuRnace see FIguRes 1 tHROugH 7 OF can/csa-B366.1-M91.
