MUA-SVX003B-EN
13
Installation
WWAARRNNIINNGG
HHaazzaarrddoouuss VVoollttaaggee!!
FFaaiilluurree ttoo ddiissccoonnnneecctt ppoowweerr bbeeffoorree sseerrvviicciinngg ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy..
DDiissccoonnnneecctt aallll eelleeccttrriicc ppoowweerr,, iinncclluuddiinngg rreemmoottee ddiissccoonnnneeccttss bbeeffoorree sseerrvviicciinngg.. FFoollllooww
pprrooppeerr lloocckkoouutt//ttaaggoouutt pprroocceedduurreess ttoo eennssuurree tthhee ppoowweerr ccaann nnoott bbee iinnaaddvveerrtteennttllyy
eenneerrggiizzeedd.. VVeerriiffyy tthhaatt nnoo ppoowweerr iiss pprreesseenntt wwiitthh aa vvoollttmmeetteerr..
Installation must conform with local building codes or in the absence of local codes with the
latest edition of the National Fuel Gas Code ANSI Z223.1 (N.F.P.A. No. 54) National Fuel Gas
Code.
A heat loss study and a complete layout of the system should be made first.
When locating the unit in its permanent location, make certain that the roof is capable of carrying
the additional load of the equipment. CChheecckk tthhee uunniitt nneett wweeiigghhttss sseeccttiioonn ooff tthhiiss mmaannuuaall.
Make certain that clearances are provided for service, minimum clearance to combustible
material and to venting cap. See Figure 2, p. 11 for this information.
Ducts connected to units which do not have either a blower section or a supply plenum must
have a removable access panel in the duct, which is connected to a duct furnace. The duct
openings shall be accessible when the unit is installed in service and shall be of such size that
smoke or reflected light may be observed inside the casing to indicate the presence of leaks in
the heating element. The covers for the panels shall be attached in such manner as to prevent
leaks. Ducts exposed to the outdoors must be insulated and sealed to prevent water from
entering either the unit or building through the duct.
If a single, double or triple duct furnace only unit is connected to a return air duct or any other
inlet air restriction, the appliance shall be installed on the positive pressure side of the air
circulating blower.
NNOOTTIICCEE
UUnniitt DDaammaaggee!!
FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn uunniitt ddaammaaggee..
RReemmoovvee wwooooddeenn sshhiippppiinngg ssuuppppoorrtt ffrroomm bbeenneeaatthh bblloowweerr hhoouussiinngg ooff bblloowweerr SSeeccttiioonn..
Installation Clearances
WWAARRNNIINNGG
CCoommbbuussttiibbllee MMaatteerriiaallss!!
FFaaiilluurree ttoo mmaaiinnttaaiinn pprrooppeerr cclleeaarraannccee bbeettwweeeenn tthhee uunniitt aanndd ccoommbbuussttiibbllee mmaatteerriiaallss ccoouulldd
ccaauussee aa ffiirree wwhhiicchh ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy oorr pprrooppeerrttyy ddaammaaggee..
RReeffeerr ttoo uunniitt nnaammeeppllaattee aanndd iinnssttaallllaattiioonn iinnssttrruuccttiioonnss ffoorr pprrooppeerr cclleeaarraanncceess..
Minimum clearances to combustible material are shown on the unit data plate. It is important
that clearances be maintained for servicing the unit (refer to Submittal Insert for service
clearances), and that minimum clearances are provided from the unit (including vent cap, if
Natural Vent model) to combustible material. Clearances around the outside air hood (if unit is so
equipped) must be unobstructed. See Figure 2, p. 11.
Mounting on Field Furnished Supports
Single, double, triple duct furnace only models have base rails which are suitable for mounting
either directly on solid planking or steel channels. Never install the unit on a soft roof where the
rails could sink, reducing clearance between the bottom panel and the roof, or cause damage to
the roofing surface.
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