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TO USE COOLING
CHARGING
(;HARTS
Take t he liquid line temperature
and read t he manifold pressure
gauges.
Refer tothe chart todetermine
what the liquid line temperature
should be.
NOTE: I f theproblem c ausing theinaccurate
readings is a
refrigerant
leak, refer toCheck forRefrigerant
Leaks section.
INDOOR AIRFLOW A ND AIRFLOW A DJUSTMENTS
NOTE: Be sure t hat all s upply- and r eturn-air
grilles are open, free
from obstructions,
and adjusted
properly.
The 5 0DU unit u tilizes state ofthe art E CM (Electronic
Computated
Motor) I D Blower Motors.See UI instructions
fordetailed
information
onadjusting
airflow.
NON-COMMUNICATING
EMERGENCY COOLING
/
HEATING
MODE
This mode of operation
is provided
only in the case where the UI has
failed or is otherwise
unavailable.
If communications
cannot
be
established
with the UI, the Infinity fan coil board will enable the R,
C, Y. and W input terminals
to allow simple thermostatic
control of
the 50DU unit.
For control
with
a standard
thermostat,
disconnect
the ABCD
connectors
from both
control
boards
and make
the connections
between
the standard
thermostat,
the fan coil board, and the HP/AC
board per Fig. 17. Recommend
the use of interconnecting
wire with
105C. 600V, 2/64" insulation.
The Infinity
control will respond
to cooling
and heating
demands
with
the maximum
safe airflow
based
on electric
heat size (if
applicable)
and unit capacity.
MAINTENANCE
To ensure
continuing
high
perfonnance,
and
to minimize
the
possibility
of premature
equipment
failure,
periodic
maintenance
must
be
performed
on
this
equipment.
This
packaged
air
conditioner
unit should
be inspected
at least once each year by a
qualified
service
person.
To troubleshoot
unit.
refer to Table 8,
Troubleshooting
Chart.
Infinity
Fan Coil
Board
NOTE
TO EQUIPMENT
OWNER:
Consult
your
local
dealer
about the availability
of a maintenance
contract.
PERSONAL
INJURY
AND UNIT
DAMAGE
HAZARD
Failure to follow this warning
could result in personal
injury
or death and possible
unit component
damage.
The
ability
to
properly
perform
maintenance
on
this
equipment
requires
certain expertise,
mechanical
skills, tools
and equipment.
If you do not possess these, do not attempt to
perform
any maintenance
on this equipment,
other than those
procedures
recommended
in the Owner's
Manual.
ELECTRICAL
SHOCK
HAZARD
Failure
to follow
these warnings
could
result
in personal
injury or death:
1. Turn offelectrical
power to the unit before performing
any
maintenance
or service on this unit.
2. Use extreme
caution
when removing
panels and parts.
3. Never place anything
combustible
either on or in contact
with the unit.
UNIT
OPERATION
HAZARD
Failure to follow this caution may result in equipment
damage
or improper
operation.
Errors
made when reconnecting
wires may cause
improper
and
dangerous
operation.
Label
all
wires
prior
to
disconnecting
when servicing.
Infinity
HP/AC
Board
n
Standard
Thermostat
m
LEGEND
Factory
Wiring
Field Wiring
m
m
|
|
|
|
|
Outdoor
Air Thermistor
(Supplied
with UI)
FIELD
CONNECTION
REQUIRED
(BLACK
WIRES)
OAT
OCT
Outdoor
Coil Thermistor
FACTORY
CONNECTED
'q
Y1/Y2
_
JUMPER
Fig. 17 - Non-Communicating
Emergency
Cooling/Heating
Wiring
Connections
A06283
19
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