ION Damper Control Installation And Start-Up Instructions Manual page 6

LEAVING AIR TEMPERATURE / HEAT PUMP TEMPER-
ATURE (LAT / HPT) SENSORS
These inputs on the Iont Damper Control are used only for
diagnostic purposes and NOT required for regular use.
Traditionally, the LAT/HPT sensors were required for temperature
and equipment monitoring. The Iont Zoning System does not
require these because the IontSystem Control algorithms will
perform temperature and airflow management without the use of
these sensors. If desired, one or both sensors may be used to
monitor leaving air temperature and/or indoor coil air temperature.
Consideration and/or flexibility will now permit using one of these
sensors in the return air duct giving the dealer an option to view
both entering and leaving air temperature at the Iont System
Control. If applied, connect sensors to the LAT / HPT terminals
(See Fig. 9, System Wiring, for connection to the Iont Damper
Control). LAT is monitored by both AC and HP systems. LAT and
HPT are both monitored only in HP systems.
To install - - Locate the LAT sensor in the main supply trunk after
the heating and cooling coil and before the first branch. The LAT
sensor is radiant shielded to prevent heat from affecting correct air
temperature.
1. Drill a 1/4 inch hole at the location in the supply trunk
where the sensor will be installed.
2. Insert the sensor in the hole and use it as a template to mark
the two mounting holes.
3. Drill two 1/16 inch holes to accept #6 screws through pre- -
drilled holes in the duct temperature sensor backplate.
4. Use two #6 sheet metal screws to mount the duct tempera-
ture sensor to the unit.
5. Connect the sensor to 2- -conductor wire using the provided
wire nuts.
The HPT sensor (in heat pump applications) measures the
temperature of the air leaving the indoor coil. The sensor is
installed downstream of the indoor coil, but before the electric
heaters. It can be installed through the wall of the fan coil or may
be located entirely inside the fan coil near the blower inlet. Anchor
firmly in place with cable ties so that it cannot interfere with the
blower wheel (See Fig. 9).
LED INDICATORS
Under normal operation, the Yellow and Green LEDs will be on
continuously (solid). If the Iont Damper Control does not receive
communications with the Iont System Control, the Green LED
will not be on. If there are faults present, the Yellow LED indicator
Damper Control
Module
ZS_
Fig. 11 - - Remote Room Sensor Averaging 4- -Sensor Application (series - - parallel)
Sensor 1
Sensor 3
will blink a two- -digit status code. The first digit will blink at a fast
rate, and the second at a slow rate.
STATUS CODE
16 =
24 =
45 =
46 =
FUSE
A 1A automotive type fuse is used to protect the Iont Damper
Control from over current on the damper drive outputs. If this fuse
fails, the damper wiring should be inspected for shorts. Also, no
more than five damper motors should be connected to a single
damper output. The fuse should always be replaced with an
identical 1A automotive type.
Step 6 —
Additional Damper Control Board Setup
If you have more than four zones, a second Iont Damper Control
must be used and both dip switch settings on the second board
supporting zones 5 through 8 must be moved to the right. The
communications bus connector must be wired between both Iont
Damper Controls.
Step 7 — Transformer Requirements
The Iont Zoning System drives only two zone damper outputs at
a time. As a result, up to eight zones each with up to five dampers,
plus a smart sensor (when available), can be handled without
increasing the size of the system transformer or adding a second
zoning transformer.
Use of the transformer provided in the furnace or fan coil is
recommended without change in all zoning applications.
For those who still want more transformer capacity, a 60 VA
system transformer may be used in place of the supplied 40 VA
part. Note that if more power for the communicating system is
desired, use a field- -installed, Class 2, 24VAC transformer. Remove
the "C" and "R" power connections from the indoor unit
communication bus connector. Connect the communication bus C
and R connections at the Iont Damper Control to the
field- -installed transformer to power the communication system.
Step 8 — System Start- -up
Follow the system start- -up process outlined in the IontSystem
Control Installation Instructions for details.
Sensor 2
Sensor 4
6
DESCRIPTION
Communication Failure
Damper Fuse Failed
Board Failure
Low Input Voltage
Damper Control
Module
ZS_C
A03233