Table of Contents
Advertisement
Main Electrical Power Requirements
[ ] Verify that the power supply complies
with the unit nameplate specifications.
[ ] Inspect all control panel components;
tighten any loose connections.
[ ] Connect properly sized and protected
power supply wiring to a field-sup-
plied/installed disconnect switch and to
the main power terminal block (HTB1)
in the unit control panel.
[ ] Install proper grounding wires to an
earth ground.
Note:
All field-installed wiring must comply with
applicable state and local codes.
Electric Heat Requirements
[ ] Verify that the power supply complies
with the electric heater specifications
on the unit and heater nameplate.
[ ] Inspect the heater junction box and
control panel; tighten any loose con-
nections.
[ ] Check electric heat circuits for continu-
ity.
Low Voltage Wiring (AC & DC) Re-
quirements
[ ] Install the zone thermostat, with or with-
out switching subbase.
[ ] Connect properly sized control wiring
to the proper termination points be-
tween the zone thermostat and the
unit control panel.
Condensate Drain Configuration
An evaporator condensate drain connec-
tion is provided on each unit. Refer to
Figure 4 for the appropriate drain loca-
tion.
The condensate drain pan is factory in-
stalled to drain condensate to the back
side of the unit. See Figure 5. It can be
converted to drain condensate out the
front side of the unit or through the base.
T_C-IOM-2A
Installation
To convert drain condensate out the
front of unit:
1. Remove evaporator access panel
and supply air access panels.
2. Remove the support panel that the
condensate drain pan exits through.
3. Slide the condensate drain pan out of
the unit and rotate 180°.
4. Slide the condensate drain pan back
into the unit, align the drain with the
grommeted opening in the rear sup-
port panel and push until the coupling
is seated in the grommet.
5. Replace the front support panel by
aligning the panel with tabs in the race-
way. Align the condensate drain pan
support in the grommeted hole as the
panel is put in place.
6. Replace evaporator access panel
and supply air access panels.
To convert drain condensate through
the base of unit:
1. Remove evaporator access panel
and supply air access panels.
2. Remove the support panel that the
condensate drain pan exits through.
3. Slide the condensate drain pan out of
the unit.
4. Place on a level surface in the position
it was removed from the unit.
5. Remove the plug knockout in the bot-
tom of the drainpan to convert it to
through the base drainage.
6. Plug the original condensate drain
opening with a field supplied 3/4"
NPT plug.
7. Slide the condensate drain pan back
into the unit, align the drain support
with the grommeted opening in the
rear support panel and push until the
support is seated in the grommet.
8. Replace the front support panel by
aligning the panel with tabs in the race-
way. Align the plugged condensate
drain pan coupling in the grommeted
hole as the panel is put in place.
9. Replace evaporator access panel
and supply air access panels.
A condensate trap must be installed at
the unit due to the drain connection being
on the "negative pressure" side of the
fan. Install the P-Trap using the guidelines
in Figure 5.
A condensate drain line must be con-
nected to the P-Trap. Pitch the drain lines
at least 1/2 inch (13 mm) for every 10
feet (3.0 m) of horizontal run to assure
proper condensate flow. Do not allow
the horizontal run to sag causing a pos-
sible double-trap condition which could
result in condensate backup due to "air
lock".
Figure 5
Condensate Trap Installation
21
Hide quick links:
Advertisement
Table of Contents
