Reznor ULSA 035(EC) - Page 18

1701ULSA(EC)--EN, p. 18/30
9.4GASCONVERSION

TheULSA/ULSAECheatersaredesignedtooperateonnatural,propaneorbutanegasandwillbesuppliedforthe
gastypeordered.Intheeventasiteconversionisrequired,itisnecessarytochangetheburnerjetandgasvalve.
Affixnewdataplateandgastypelabel.
Upon
completionofconversionrecommissiontheheater.Weheretorefertothesection‘Ignitionsystem’

Changestocarryout:

1 Fromnaturalgastopropane:
A propane conversion kit [part number 03 49950 ‐‐‐‐‐‐]
will have to be purchased in order to perform the
conversion. The conversion kit consists of the propane
restrictorandtheconnector(seeitem3formoredetails)
that will provide the necessary speed for
 the exhaust
blower.Inorderfortheunittobesetforpropane,thegas
valve willbe removedfrom theventuri by removingthe
three fixing screws. The brass restriction will be placed
inside the O‐ring as depicted in figure 13 andthe gas
valvewillberepositionedon
theventuri.
Throttle adjustments and CO
2
 measurements will have to
be made in order to obtain the recommended CO
2
 value.
For details please see the CO
2
/Throttle adjustment section
9.3.
Attention:Alwaysconsulttheappropriateinstruction
withreferencexxxx0311
1
/xxxx0311
2
‐ENprovidingallneeded
dataandinformationtoperformtheconversion..
2 Frompropanetonaturalgas
 Inorderforaheatersetonpropanetobeconvertedtonaturalgas,thebrassrestrictionwillberemovedand
throttleadjustments*andCO
2
adjustments(*)remadeinordertoachievethenormalvaluesfornaturalgas.

Figure14:NaturalgasFigure15:Propane

 (*) Ifanerrorismade,andtheunithasonlythebrasspropanerestrictorremovedwithouthavingthe
combustionvalueschecked,permanentdamagetotheunitwilloccur.
3. Connector
Inscriptionontheconnector
indicatesthesizeoftheunitand
thetypeofgastobeused.
Example:inphoto16theunitisa
ULSA/ULSAEC50setfornatural
gas.
Theconnectorforpropaneuseis
providedwitharedwire
mentioningtheinscriptionPROP
(see
phote17).
Figuur16 Figuur17



Propane
restriction
Gas valve
Venturi
Rubber
O-ring
Fixing
screws
Figure13
Propane
restriction