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DV425TR DIRECT VENT ROOM HEATER
02/01                                                                                     Page 44                                                                               250-5533
 
The gas line must be installed in accordance 
with all local codes, if any; if not, follow ANSI 223.1 
and the requirements listed below.  
 
The stove and gas control valve must be 
disconnected from the gas supply piping during any 
pressure testing of that system at test pressures in 
excess of 1/2 psig.  For pressures under 1/2 psig, 
isolate the gas supply piping by closing the manual 
shut-off valve.
 
The appliance must be isolated from the gas 
supply piping system by closing its equipment shutoff 
valve during any pressure testing of the gas supply 
piping system at test pressures equal to or less than 
1/2 psi (3.5 kPa).
 
Leak test all gas line joints and the gas control 
valve prior to and after starting the stove.
Fuel
 
This unit is manufactured  for use with  natural 
gas.  To convert to LP gas, Part #844-9010 LP 
Conversion Kit, is required and available through your 
dealer
Gas Line Connection
 
Before making the gas connection, ensure 
that the stove you are installing is designed for the 
type of gas being supplied.  This information can be 
found on the Ratings Label on the back of stove.  If 
the stove has been converted to propane (LP), the 
valve cover will have a label stating that the unit has 
been converted to propane.
 
Connect the gas line at the 3/8” pipe 
connector on the valve at the back of stove.  See 
illustration on the next page.  We recommend 
connecting the stove with an approved flex gas line.  
If flex gas lines are not approved in your area, you 
cannect a hard pipe to the gas hookup.  
 
You must supply a manual shutoff valve in a 
visible location within 3’ (914mm) of the stove.
 
After running new gas line, or if a gas line has 
been disconnected, purging of the gas line may be 
necessary.  To purge gas line, open the inlet pressure 
tap and allow gas to flow through while carefully 
CAUTION:  In some areas, gas line pressure 
may  be  more  than  1/2  PSIG  (14”WC).    If 
you  believe  that  this  is  the  case  in  your 
locality,  contact  your  gas  supplier  or  local 
utility company.  Line pressure greater than 
1/2  PSIG  will  damage  the  stove  valve.   You 
must  install  a  regulator  upstream  from  the 
stove  if  line  pressure  is  greater  than  1/2 
PSIG.
GAS LINE REQUIREMENTS
monitoring for the odor of either natural gas, which 
will rise, or propane, which will settle near the 
floor.  As soon as you smell the gas, discontinue 
purging the line.  Ensure that the room has plenty 
of ventilation and that no sparks or open flames 
are near the end of the gas line during the purging 
process.  Do not try to ignite the stove until any and 
all gas accumulation has been cleared from the room.