Check that there is a 1/2 inch gas line in the fireplace with a cutoff
valve outside the fireplace, also make sure that there is infact gas at
this gas line and that the gas pressure is enough to run a log set.
In older homes and some new ones it is common to find the gas pressure
low at the fireplace due to one of the following.

Ashes in the pipe at the fireplace.
A dirt clod packed in the pipe.(happens during construction)
Water in the line.
Rust in the line.
Excess pipe joint sealer in the pipe.
Broken Gas line.

To check the pressure in fireplaces with log lighters that are made
of pipe with small slots cut in the pipe.
Open the damper and light the log lighter, Now turn the Turn the valve
up until the flame rises off the pipe or blows out. If the flame
will not do either then the pipe is obstructed or broken.
Turn the valve off. If the Log lighter has the slots pointing up the
there is probably ashes in the lighter or gas line. This can be cleared
by removing the log lighter from the line and using a wire coat hanger
in the pipe to clear the line. To do this first remove all the piping
except the pipe that enters the fireplace, This is sometimes easier sead
than done, Sometimes the pipes just will not come apart or will twist into
when pressure from a pipe wrench is applied.
Also some log lighters are nothing more than a 1/2 inch pipe entering
the fireplace with slots cut in it with a hacksaw.

IMPORTANT NOTE:     NEVER NEVER EVER REMOVE THIS TYPE OF LIGHTER BY UNSCREWING IT OUT OF THE WALL OF THE FIREPLACE.

It could cause the pipe in the wall to drop lower in the wall and you will
never get it back together if this happens without tearing out the wall
next to the fireplace

there is a workaround for this type of problem as follows.

1 The pipe must be cut with a hacksaw leaving about 1 inch inside
the fireplace.

2 Using a 3/8-32 NPT TAP tap the inside of the pipe this puts screw
threads inside the 1/2 inch pipe.
you will need a 12 point socket and ratchet that fits the square end of the
tap.

Now check the pressure again at the open end of the pipe, With a long butane
lighter or match light the end of the open pipe, turn the valve up keeping the flame
inside the fireplace, This should be a roaring flame, Watch the flame
if it sparkles at the pipe, then there are ashes and/or rust in the pipe
Take your wire and run it inside the pipe while it is burning until it
stops this is where the obstruction is. bounce the wire up and down
on the obstruction to break it up it should start blowing out the pipe
with a pretty display of small sparks and the pressure should start
to rise as it clears. Turn the valve up to help blow out the line.

If You feel uncomfortable with this please call a plumber to help in
clearing the line.

3 Now thread a 3/8 NPT male to 1/2 NPT male fitting into the pipe using
pipe thread sealer on the threads. You may at this point to use a fitting
that will better suit your needs such as a 3/8 NPT male to 3/8 flair
90 degree fitting, This could help in running the 3/8 soft piping that comes
in the set.

Also keep in mined that if you are installing a 24 inch set or larger
and your gas line enters the fireplace in the center of the fireplace,
the 12 inch soft piping that comes with the set will not work you will need
to have a longer pipe made.

The Log Set.

In the set there may be a pressure reducer that installs with the fitting
on the burner pan of the log set, on most sets this is removable and on
one or two it is not this is here for people that are running LPG
or propane. If you are using natural gas then remove this pressure reducer
install the fitting on the burner pan place the pan in the center of the
fireplace and route the 3/8 soft piping from the 1/2 inch gas line to the
burner pan and tighten in place. Be careful not to kink the pipe while
bending it, I have had to bend these pipes into all kinds of shapes to
get them hooked up the smallest radius is about 2 inches and at this it
still flattens the pipe a little.

remember there are all types of fittings at your local hardware store to
get you out of tight spots.

Check the pressure again now that the pan is installed before adding the
sand.

Light your lighter or match hold it to the inside of the burner pan then
turn on the gas slowly the burner should light, Now turn up the gas, You
should get a roaring flame about 12 to 24 inches high to the top of the flames.

Turn the gas off and check the piping again to make sure the fittings are tight.

If all is well then it's time to pour some sand into the pan open the bag of
sand and pour it into the burner pan slowly starting at the back of the
pan filling the pan to the top at the back of the pan, This makes a sloping
pile of sand inside the burner pan.

Now there should be a bag of rockwool insulation and in some sets a bag
of vermiculite granules take the bag of insulation and with small pieces
place it all over the slope of sand in a single layer you may or may not
need all that came with your set now take the bag of granules if supplied
and sprinkle this all over the top of the insulation.

place the log grate that came with the set over the pan and place the logs
on the grate. You can place the top logs any way you want but the two
bottom logs must stay the same, small log in back.

Now you are ready to light the set, light your lighter or match and place
it against the insulation on the sand hill and then slowly turn the gas
on, watch the flame it should come out of the sand and travel up the hill
over the top of the insulation causing the insulation to glow like coals
if they do not glow then they are either to high or to low if they are to
high then just push them down a little, if they are to low fluff then up
or add more to that spot.

Now check that the flame is rising around the logs if there is not enough
yellow flame then you must reach down between the logs with a stick and
flatten out the sand hill a little to let more gas out at the back.

just remember to keep your glowing embers or insulation on top of the sand
hill.
If the flame come up to far behind the logs push the log grate back until the
feet touch the burner pan this should be the best place for the grate,

Now if your set came with a bag of lava rock this is used as a floor
cover and not in the burner pan open the bag and poor the rock around
the sides and front of the burner pan hiding the piping and the metal
edge of the burner pan at the fireplace floor you can buy more lava
if your set did not have enough.

HEY!!!!!!     that's it your done enjoy your logs.

IMPORTANT NOTE:     IF you have glass doors on your fireplace then please keep them open
when the logs are in use, This is due to the fact that the glass is tempered
and these logs get very hot after they have been on for a while, if there
is a small scratch on the glass the heat from the log set can and has expanded
the glass and shattered it. Log sets get hotter than real wood.

Also make sure the damper is open when the set is in use.
Most sets come with a damper locking clamp, PLEASE use it
gas log sets produce large amounts of carbon monoxide gas and
if you do not have the damper open you could DIE from carbon monoxide
poisoning PLEASE PLEASE be careful.