Step 5 — Connect Condensate Drain Line —
Observe all local sanitary codes when installing condensate
drains.
1. Connect drain line by inserting a
5
⁄
8
-in. rigid PVC pipe
over the drain connection. Refer to Fig. 11.
The drain tube extension must be securely fastened
to the condensate drain. Failure to do so can result
in condensate water dripping onto the floor.
2. To ensure regular flow of condensate water, the drain pipe
should be pitched toward an open drain or sump at a down-
ward slope of at least
1
⁄
4
-in. per foot. Refer to Fig. 12.
IMPORTANT: Be sure the drain piping has no slack
which might form a trap. Do not insert a trap in the
drain line; the drain is internally trapped.
3. Insulate condensate drain line(s). Insulate the condensate
drain lines that are located in or above an occupied area
with a condensate proof material such as polyurethane or
neoprene.
Step 6 — Make Electrical Connections —
Be sure
field wiring complies with local building codes and NEC,
and unit voltage is within limits shown in Table 5.
Contact local power company for correction of improper
line voltage.
To avoid personal injury or damage to unit, do not make
electrical connections until all power sources are shut
down, locked out, and tagged off. Failure to do so could
result in personal injury or unit damage.
Operation of unit on improper line voltage constitutes
abuse and could affect warranty. Refer to Table 5 for
permissible operating limits. Do not install unit in sys-
tem where voltage may fluctuate above or below per-
missible limits.
NOTE: Use type NM power cable only (per NEC; provided
for fan coil units only) between disconnect switch and unit.
NOTE: Install branch circuit disconnect per NEC of ad-
equate size to handle unit starting current. Locate disconnect
within sight from and readily accessible from unit, per
Section 440-14 of NEC. Some codes allow indoor unit to
share disconnect with outdoor unit if disconnect can be locked;
check local code before installing in this manner. To make
electrical connections:
1. Remove the screws holding the front cover of the fan coil
unit, and remove front cover. Save screws and screw
covers for reinstallation.
2. Remove control box strain relief clamp (see Fig. 13).
3. Remove any factory test leads still connected to the power
terminal box. These leads (if applicable) are for factory
testing only and cannot be used for power connections.
4. Route the factory-supplied ground and power wires from
terminal block 1 (TB1) to the field-supplied disconnect
switch.
According to NEC and most local codes, the unit
must have an uninterrupted, unbroken ground to mini-
mize personal injury if an electrical fault should oc-
cur. The ground may consist of electrical wire or
metal conduit when installed in accordance with ex-
isting electrical codes. Failure to follow this warn-
ing could result in an electric shock, fire, or death.
5. Route factory-supplied line power leads (see Fig. 14) from
field-supplied, indoor unit disconnect to the fan coil unit
TB1 (see Fig. 14 and 15). Run wire through the strain
relief on the control box (see Fig. 13). When routing wire
in the fan coil unit, keep the wire away from refrigerant
and condensate piping and any sharp edges on the unit.
Do not short circuit the 40QN transformer
−
it is
fused. The transformer can be short circuited by con-
necting the wrong wires or by touching a live wire
to the side of a grounded control box.
Fig. 11 — Drain Connection (Right Side Shown When
Facing Fan Coil Unit)
7
