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|nsta||er's
Guide
H. OPERATIONAL
AND CHECKOUT
PROCEDURES
Final phases
of this installation
are the unit Operational
and
Checkout
Procedures
which are found in this instruction
on
page 8. To obtain proper performance,
all units must be
operated
and charge adjustments
made in accordance
with
procedures
found in the Service Facts.
I. ELECTRIC
HEATERS
Electric heaters,
if used, are to be installed
in the air han-
dling device according
to the instructions
accompanying
the
air handler
and the heaters.
J. START CONTROL
Some models have quick start components
which are factory
installed.
For models that do not have factory installed
start
components,
provisions
are made for a field installed
start kit
accessory.
When adding an accessory,
follow the instructions
provided
with the kit.
K. OUTDOOR
THERMOSTAT
An outdoor thermostat
TAYSTAT250A
may be field installed.
For data,
see wiring diagram
attached
to unit and instruction
sheet packaged
with outdoor thermostat.
L. SEACOAST
SALT SHIELD
All units are shipped
with a black Seacoast
Salt Shield
attached
to the access panel. Removal of the shield -will
potentially
shorten
the life of the joints in the outdoor coil.
T'STAT
TYPICAL
FIELD HOOK=UP DIAGRAM
VAR}AB/E
SPEED
AIR
HANDLER
NO]E
8
.......................................
See
Note A
PRINT
D FROM D 54050P01
2 STAGE
I
HAT
PUMP
R
ODTA
B
BR
.......
(I)
0
Notes:
1. Be sure power supply agrees with equipment
nameplate.
2. Power wiring and grounding of equipment must comply with local codes.
3. Low voltage wiring to be No. 18 AWG minimum conductor.
4. ODT-B must be set lower than ODT-A.
5. If ODT-B is not used, connect A Jumper wire from W3 to W2. If ODT-A is
not used, connect a jumper wire from W2 to W1.
6. If electric heat does not have 3rd contactor (CH), connect a jumper wire
from W3 to W2. If electric heat does not have 2nd contactor
(BH),
connect a jumper wire from W2 to W1.
7. X2 must be connected
to variable speed air handler terminal W3, as
shown, for proper indoor air flow during the defrost cycle.
8. Be sure the jumper between R and BK is cut or removed.
9. With O and Y/Y2 energized, indoor fan is at 80% airflow.
10. With O, Y/Y2 and BK energized, indoor fan is at 100% airflow.
11. Connect only if used with applicable
indoor thermostat.
(_)
AIR HANDLER
G
O
B
W3 W2 W!
[] [] [] [] [] []
e
[]_[]T Y
YIo
oi
_'dumper
See Note B
LEGEND
.....
FACTORY WIRING
_
FIELD WIRING
REQUIRED WIRING
Refer to Field Hook-up Diagrams above.
4TWX6 units require 80% airflow with Y1 (first stage), 100% airflow with Y2 (second stage).
Note A - The installer must jumper at the L_/q-B"R" to "O".
Note El - Cut/remove the factory installed "BK" jumper (See Figure 1).
Connect "YI" from thermostat to "Y!Y2" at VS Airhandler to "Y1" at Outdoor Unit.
Connect "Y2" from thermostat to "BK" at VS Airhandler to "Y2" at Outdoor Unit.
18-BC55D1-2
5
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