I
NSTALLATION
M
EDIUM
D
UTY
C
OUNTERLINE
P
AGE
10
O
PERATOR
’
S
M
ANUAL
1178822
REV
3
IN
S
TA
LLA
TI
ON
Provided orifices are size #45 for natural gas and #55 for propane gas. For special gas mixtures, and for
altitudes above 2,000 feet, consult factory for appropriate orifice sizes.
Step 3: Connect Gas Supply
All units are shipped from the factory equipped for use with natural gas. If the unit is to be used with propane
gas, the orifices must be replaced and the pressure regulator converted (see Step 2 on previous page).
If this equipment is being installed at over 2,000 feet altitude and that information was not specified when
ordered, contact the appropriate authorized Southbend Service Representative or the Southbend Service
Department. Failure to install with proper orifice sizing will result in poor performance and may void the
warranty.
The serial plate is located interior side of the valve panel (see Figure 1 on page 3). It indicates the type of
gas the unit is equipped to burn. All Southbend equipment is adjusted at the factory. Check type of gas on
serial plate.
These models are design-certified for operation on natural or propane gases. For natural gas, the convertible
regulator is set to deliver a 4" W.C. pressure to the manifold. For propane gas, it is set to deliver 10" W.C.
If applicable, the vent line from the gas appliance pressure regulator shall be installed to the outdoors in
accordance with local codes or, in the absence of local codes, with the
National Fuel Gas Code, ANSI
Z223.1
,
Natural Gas Installation Code, CAN/CGA-B149.1
, or
the Propane Installation Code, CAN/CGA-
B149.2
, as applicable.
This appliance should be connected ONLY to the type of gas for which it is equipped.
An adequate gas supply is imperative. Undersized or low pressure lines will restrict the volume of gas
required for satisfactory performance. Fluctuations of more than 25% on natural gas or 10% on propane gas
will create problems and affect burner operating characteristics. A 1/8" pressure tap is located on the
manifold to measure pressure.
An adequate gas supply line to the unit should be no smaller than the I.D. of the pipe from the unit to which it
is connected.
Purge the supply line to clean out dust, dirt, or other foreign matter before connecting the line to the unit.
Use pipe joint compound that is suitable for use with LP gas on all threaded connections.
!
CAUTION
ALL PIPE JOINTS AND CONNECTIONS MUST BE TESTED THOROUGHLY FOR GAS LEAKS.
USE ONLY SOAPY WATER FOR TESTING ON ALL GASES. NEVER USE AN OPEN FLAME TO
CHECK FOR GAS LEAKS. ALL CONNECTIONS MUST BE CHECKED FOR LEAKS AFTER THE
UNIT HAS BEEN PUT INTO OPERATION. TEST PRESSURE SHOULD NOT EXCEED 14" W.C.
Step 4: Position Unit for Operation
1. Check that the unit is level. The length of each leg is adjustable by screwing the bottom portion of the leg
in or out. The unit must be level for proper operation!
2. Check for adequate clearances around the unit (see page 5).
3. Check for adequate ventilation (see page 5).
