24
L8V1-SVX001-1A-EN
9. Remove the manometer and flexible tubing and
tighten the pressure tap screw.
10. Using a leak detection solution or soap suds, check
for leaks at the pressure outlet boss and pressure
tap test screw.
11. Turn on system power and check operation of the
unit.
Outlet Pressure Boss
Run Stage (HI) Manifold Pressure Adjustment
Light Off (LO) Manifold Pressure Adjustment
Inlet Pressure
Boss
Gas Valve On/Off
Toggle Switch
White-Rodgers 36J
Maximum and Minimum INLET Pressure (inches w.c.)
Natural Gas
Maximum 13.8
Minimum 5
Recommended Fuel Manifold Settings (inches w.c.)
L8V1A040U3VS
2.1" Light-Off (LO) /
3.0" Run (HI)
L8V1A060U3VS
L8V1B080U4VS
L8V1C100U5VS
Orifice sizes for Natural Gas
L8V1A040U3VS 3.2 mm
L8V1A060U3VS #23
L8V1B080U4VS #15
L8V1C100U5VS #11
NNoottee:: Adjust RUN / (HI) manifold pressure to ~ 2.7" if
high pitch combustion sound develops.
High Altitude Derate
Input ratings (BTUH) of these Furnaces are based on
sea level operation and should not be changed at
elevations up to 2,000 ft. (610 m).
If the installation is 2,000 ft. (610 m) or above, the
Furnace input rate (BTUH) shall be reduced 4% for each
1,000 ft. above sea level.
The Furnace input rate shall be checked by clocking the
gas flow rate (CFH) and multiplying by the heating
value obtained from the local utility supplier for the gas
being delivered at the installed altitude. Input rate
changes can be made by adjusting the Manifold
Pressure (min 2.7 - max 3.0 in. W.C. - Natural Gas).
If the desired input rate can not be achieved with a
change in Manifold Pressure, then the orifices must be
changed.
PART NUMBERS FOR REPLACEMENT ORIFICES
DRILL SIZE J-TUBE PART NUMBER
A040 = 3.2 mm TUB15871
A060 = #23 TUB15353
B080 = #15 TUB15443
C100 = #11 TUB15780
Turn the main Gas Valve toggle switch within the unit
to the "OOFFFF" position. Turn the external gas valve to
"ON". Purge the air from the gas lines. After purging,
check all gas connections for leaks with a soapy
solution – DDOO NNOOTT CCHHEECCKK WWIITTHH AANN OOPPEENN FFLLAAMMEE..
Allow 5 minutes for any gas that might have escaped to
dissipate.
NNoottee:: For furnaces requiring modifications other than
manifold pressure adjustment for installation at
high altitude, installation of this furnace at
altitudes above 2000 ft (610 m) shall be made in
accordance with the listed High Altitude
Conversion Kit available with this furnace.
High Altitude Kits
Attributes 0 - 4000 ft 4001 - 7800 ft
A040 N/A BAYHALTMOD0005
A060
N/A
BAYHALTMOD0006
B080 N/A BAYHALTMOD0007
C100 N/A BAYHALTMOD0004
FFuurrnnaaccee GGeenneerraall IInnssttaallllaattiioonn
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