13
NOTICE: It is a requirement of the International
Mechanical Code (307.2.3) to install a secondary drain
or an auxiliary drain pan where damage to any
building components will occur as a result of
overflow from the equipment drain pan or stoppage in
the condensate drain piping from a cooling or an
evaporator coil. Follow local code requirements.
Refer to Figure 2.2 and 2.3 for primary and secondary
condensate drain locations. Components for the PVC
condensate trap are provided in a separate bag with fan
coil unit (see Figure 2.15) and should be cemented
together with PVC pipe cement.
Do not use substitute trap. Do not cut
off or alter trap components.
Thread male adapter (see Figure 2.9) into unit’s primary
condensate drain connection. Assemble and cement
remaining components together. Then cement assembly
to male adapter. The 45° elbow provides an offset from
beneath unit suction line for access to clean-out plug.
Run a condensate line from the trap to a suitable drain
that’s in accordance with local codes. Make sure the line
is pitched 1/4" per foot.
NOTICE: The secondary drain connection requires
field supplied components to complete installation.
Follow local code requirements.
NOTICE: Never connect condensate line to a closed
drain system.
Step 6: Installing the Condensate Trap & Line
FIGURE 2.15: CONDENSATE TRAP ASSEMBLY
Step 7: Wiring the Unit
All electrical and control wiring must be installed in
accordance with the codes listed in Section 1 of this
manual. Standard wiring diagram is provided in Figure
2.16. Optional wiring diagrams are provided in Figures
2.17-2.20. A separate 230/60/1 power supply is
recommended for the unit. Use standard 15-amp circuit
breaker and 14-gauge wire from power supply to unit.
Connect power supply to Terminals L1 and L2 on the
high voltage terminal block. Connect a ground wire to
the equipment ground terminal located next to the high
voltage terminal block.
Turn off electrical power supply
before servicing. Contact with live electric com-
ponents can cause shock or death.
Locate the room thermostat on a wall near the return air
box, between 40" to 48" from the floor. Connect the low-
voltage thermostat wiring from the room thermostat to
the low voltage control block in the unit.
Connect low voltage from air handler to condensing unit
as shown in figure 2.16.
Alternately, the unit may be configured to run on
115V, 60 Hz power. Refer to wiring diagram section.
Step 8: Installing Air Distribution Components
All plenum duct and supply tubing runs as well as room
terminator locations must be in accordance with air
distribution system requirements listed in Section 1 of
this manual. Where taping of joints is required, UL181
approved tape is required.
Plenum Duct Installation
All tees, elbows and branch runs must be a minimum of 18"
from the fan coil unit or any other tee, elbow or branch run.
Keep all tees and elbows to a minimum to keep system
pressure drop on larger layouts to a minimum.
NOTICE: Refer to duct installation instructions sup-
plied with fan coil unit or follow manufacturers in-
structions supplied with other duct system types.
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