Carrier 31KAX - Manual (Page 7)

A CAUTION
Do not baffle off any portion of the entering-air side of the
air cleaner.
9. Seal all joints on downstream side of air cleaner to prevent
infiltration of contaminated air.
STEP 3. ELECTRICAL CONNECTIONS
All wiring must comply with applicable local and national
codes. Determine best power wiring routing (see Section A for
Internal Connections and Section B for External Connections).
A CAUTION
Be sure all
procedures. incoming power is off before beginning any
A. Internal Electrical Connections
Proceed as follows to make internal electrical connections.
1. With power door removed, remove junction box cover adja-
cent to female plug on casing upper channel.
2. Install protective bushing from inside the air cleaner into
the upper hole on the side channel adjacent to the furnace.
Be sure bushing projects into furnace opening protecting
wires from sharp edges on cabinet opening.
3. Install protective bushing through top rail as shown in
Fig. 10.
4. Plug unused hole on top of unit with plug provided in
parts bag.
5. Route power wires through bushing channel at top of cabi­
net, down side channel, and through bushing in side chan­
nel and into furnace opening. See Fig. 10.
6. Replace cover of junction box.
7. Install wire cover (provided in parts bag) under top flange
and secure to side channel with screw provided.
8. Connect power leads as follows:
Single speed furnaces —Electronic air cleaner is wired in par­
allel with fan motor. See Fig. 11.
Multispeed direct-drive furnaces— If the air cleaner is wired to
a multispeed direct-drive motor, it must be isolated by a relay
or sail switch. Use either air cleaner relay P/N P283-1203 or sail
switch P/N 69105D1. See Pig. 12 or 13.
Furnaces with printed circuit control module —Electronic air
cleaner is wired to furnace terminals EAC-1 and EAC-2. See
Fig. 14 for wiring connections'.
9. Connect ground wire to base unit ground.
NOTE: For non-corporate furnaces, wire unit using conduit and
strain relief the wires.
A CAUTION
Be sure all internal wiring connections are tight before unit
is operated.
B. External Electrical Connections
1. Attach power supply conduit to hole in top of electronic air
cleaner. Do not use extension cord to connect to electrical
power source.
2. Cut electronic air cleaner wires to 6-in. long; strip ends.
Connect power leads to black and white pigtails extending
from female receptacle, using field supplied wirenuts. See
Fig. 9.
NOTE: Do not connect aluminum conductor to electrical con­
nections of the electronic air cleaner (copper wire only).
3. Connect power leads as follows:
4. Connect electronic air cleaner ground wire (green) to ap­
propriate supply ground.
5. Replace cover of junction box.
Single-speed furnaces. Electronic air cleaner is wired in paral­
lel with fan motor. See Fig. 11.
Multispeed direct-drive furnaces. If the air cleaner is wired to a
multispeed direct-drive motor, it must be isolated by a relay or
sail switch. Use either air cleaner relay P/N P283-1203 or sail
switch P/N 69105D1. See Fig. 12 or 13.
Furnaces with printed-circuit control module. Electronic air
cleaner is wired to furnace terminals EAC-1 and EAC-2. See
Fig. 14 for wiring connections.
Fan-coil units. Electronic air cleaner (120-v) must be wired to
fan-coil circuit board terminals EAC-1 and EAC-2 only as
shown in Fig. 15. Terminals EAC-1 and EAC-2 supply 240-vac.
Terminal EAC-1 is energized continuously; terminal EAC-2 is
energized only with the fan motor.
C. Final Assembly
A CAUTION
Be sure all field electrical connections are tight before unit
is operated.
1. Slide prefilters and air cleaner cells into cabinet.
NOTE; Units are shipped for air entering the right-hand side of
the air cleaner. Reverse the position of the prefilter and the air
cleaner cells in the cabinet for air entering the left-hand side of
the air cleaner as indicated in Fig. 8. Be sure all airflow arrows
are pointing in the direction of the airflow through the air
cleaner and that the prefilter is on the entering-air side.
2. Check contact spring location: cell contact springs must be
relocated for left-hand units. Remove screw holding con­
tact spring to cells and reinstall at opposite end (See Fig.
17). Be sure all airflow arrows are pointing in the direction
of the airflow through the air cleaner and that the
prefilters are on the entering-air side.
3. Deform prefilter guide on side opposite prefilters so that
prefilters may not be reinstalled incorrectly.
4. Replace power door by first inserting bottom tab into place
on bottom edge of door opening. Push top of door and
guide door attachment knob screw into threads. Tirn knob
clockwise until screw engages threads in casing. Tbrn knob
clockwise until door is secure. Ensure good electrical con­
tact between power door and unit components.
5. Unit can be installed with airflow through cabinet in ei­
ther direction. Apply airflow decal (provided) to cabinet,
observing actual airflow direction. See Fig. 17.
STEP 4. STARTUP AND ADJUSTMENTS
The electronic components of the unit convert the incoming
VAC to VDC power supply. Unfiltered, contaminated air passes
through an aluminum mesh prefilter which removes larger air­
borne particles and distributes the air uniformly across the ion­
izer-collector assembly. The air passes through the ionizer and
is charged with 7300 VDC. The ionizer imparts a positive elec­
trical charge to the remaining contaminants. As the air contin­
ues through the collector section, the charged contaminants are
attracted to the alternately charged collector plates. The
charged contaminants are electrostatically held by the collec­
tor, thus purifying the airstream.
1. Ensure that entire electronic air cleaner is clean, dry, and
free of foreign objects.
2. Restore power to system.
3. Move ON-OFF switch on power door to ON position.
4. Set room thermostat to start blower.