Page 7
FIGURE 9
REMOVE DRAIN PAN
DRAIN PAN
4- Rotate the drain pan until the downward slope is
toward the back of the unit. Slide the drain pan back
into the unit. Be careful not to dislodge the cap over
the bottom drain hole.
5- From the back side of the unit, pull the drain pan
coupling through the rear condensate opening.
6- Replace the condensate drain mullion and reinstall
screws.
7- Reinstall access doors.
Bottom Drain Connection
1- Remove the condensate drain mullion. See figure 7.
If the unit has hinged panels, two hinge screws must
be removed in addition to the mullion screws. See
figure 8.
2- Lift the front edge of the drain pan and slide pan out
of unit. See figure 9.
3- Turn the drain pan upside down and drill a pilot hole
through the bottom of the drain pan in the center of
the coupling. See figure 10.
4- From the inside of the pan, use a Vari-Bit
®
bit to
enlarge the hole to 7/8”. Do not damage coupling
threads.
5- Remove the cap over the unit bottom drain hole.
6- Slide the drain pan back into the unit.
7- From the back side of the unit, pull the drain pan
coupling through the rear condensate opening.
8- From the front side of the unit, move the drain pan
until the bottom coupling settles into the unit bottom
drain opening. Once in place, check to make sure the
coupling is still positioned through the rear
condensate drain hole.
FIGURE 10
BOTTOM CONDENSATE DRAIN
DRILL A PILOT
HOLE IN CENTER
OF COUPLING
After drilling the pilot
hole, drill a 7/8” hole from
the inside of the pan.
CAUTION: Be careful not to
damage the coupling threads
when drilling the hole.
9- Use a field-provided 1” plug to seal side drain
connection.
10- Replace the condensate drain mullion and reinstall
screws.
11- Reinstall access doors.
Connect Gas Piping
Before connecting field-provided piping, check with gas
company or authorities having jurisdiction for local code
requirements. When installing gas supply piping, length
of run from gas meter must be considered in determining
pipe size for 0.5” w.c. (.12kPa) maximum pressure drop.
Do not use supply pipe smaller than unit gas connection.
For natural gas units, operating pressure at the unit gas
connection must be a minimum of 4.5” w.c. (1.12kPa)
and a maximum of 10.5” (2.60kPa) w.c. For LP/propane
gas units, operating pressure at the unit gas connection
must be a minimum of 11” w.c. (2.74kPa) and a maximum
of 13.0” w.c. (3.23kPa).
When making piping connections a drip leg should be
installed on vertical pipe runs to serve as a trap for
sediment or condensate. A 1/8” N.P.T. plugged tap is
located on gas valve for test gauge connection. Refer to
Heating Start-Up section for tap location. Install a ground
joint union between the gas control manifold and the main
manual shut-off valve. See figure 11 for gas supply piping
entering outside the unit. Figure 12 shows bottom gas
entry piping through the unit.
Compounds used on threaded joints of gas piping shall be
resistant to the action of liquified petroleum gases.
