43
©
2014
Daikin
North
America,
LLC
Gas
Manifold
Pressure
Measurement
and
Adjust
Manifold
pressure
must
be
measured
with
burners
operating
.
Steps
to
measure
and
adjust
the
manifold
pressure:
Turn
off
gas
and
power
to
furnace.
Attach
manometer
hose
to
the
outlet
pressure
barb
on
gas
valve.
Turn
on
gas
and
power
to
furnace.
Close
thermostat
“R”
and
“W1”
contacts
to
call
for
low
stage
heat.
Measure
the
gas
manifold
pressure
with
burners
firing.
Outlet
Pressure
Barb
©
2014
Daikin
North
America,
LLC
Gas
Manifold
Pressure
Measurement
and
Adjust
Remove
regulator
cover
screw
from
the
low
(LO)
outlet
pressure
regulator.
Adjust
tower
and
turn
screw
clockwise
to
increase
pressure,
or
counterclockwise
to
decrease
pressure.
Replace
regulator
cover
screw.
(LO)
Pressure
Regulator
Adjust
