Specifications
APPLICATION DATA (cont)
12. Controls
An accessory wired or wireless remote controller is re-
quired for system operation on 619C,E, and F fan coil units.
a. Wired 24v controllers (619C, 619F)
1) A 24v thermostat is supplied for operation of all in-
ceiling and cassette systems.
2) Controller can only operate one unit, and required
controller is supplied for each unit.
3) The control or remote sensor must be located in the
space being conditioned.
b. Wireless remote controllers (619E)
1) A wireless remote controller is supplied for system
operation of all high-wall units.
2) Each battery-operated wireless (infrared) remote
controller may be used to control more than one unit.
3) The wireless remote controller has a maximum
range of 20 ft.
4) The unit is equipped with an emergency switch
which allows operation if the remote controller mal-
functions or is misplaced.
5) Because the controller uses infrared communication,
all of the following must be true for the controller to
work properly:
• The power must be on to the fan coil unit.
• The batteries in the controller must be good.
• The controller must be within range of and pointed
directly at the unit.
• The unit’s 3-position switch must be set in the
Remote position.
13. Thermistors
Thermistors are used on both fan coil and outdoor heat
pump high wall systems to determine operating conditions.
Proper thermistor location is critical to unit operation. All
thermistors have identical resistance values. See Ther-
mistor Equivalence charts on typical system wiring sche-
matics (pages 72-76).
Thermistor cable assemblies are provided with fan coil
units to run between indoor and outdoor units. High-voltage
and thermistor cable assemblies should not touch each
other, and cable runs may be extended up to 200 ft.
14. Wiring
Use only copper wires from the disconnect to the unit ter-
minal block. Aluminum and copper-clad aluminum wires are
not acceptable.
All duct-free heat pump systems provide 24-v power for the
outdoor unit from the indoor unit, except the high-wall sys-
tems using 619E009 and 012, which provide line voltage
control, and the high wall systems using 619E018 and 024,
which have a transformer in the outdoor unit.
All other fan coil types should have a separate disconnect
for indoor and outdoor units. In addition, cassette fan coil
units require separate disconnects for both the fan and the
heater.
15. Air throw
Refer to Air Throw Data table below for system air throw
capabilities.
AIR THROW DATA
SYSTEM
TYPE
FAN COIL
UNIT
SIZE
HIGH
SPEED
CFM
APPROXIMATE
AIR THROW
(ft)
High Wall
009 250 15
012 360 22
018 500 40
024 500 40
Ceiling
Suspended
018 500 25
024 525 27
030,036 870 38
048 1100 40
060 1600 40
In-Ceiling
Cassette
018 525 22
024,030 980 20
036 1100 20
NOTE: Air throw data is for unit mounted application with typical
clearances in a 10-ft high room.
16. Fresh air/ducting
a. The 619C ceiling-suspended fan coil units may bring
in up to 30% fresh air. The percentage of air allowable
is calculated based on the unit high speed cfm. Air
quantities above this level may exceed compressor
maximum saturated suction temperatures. A power ven-
tilation kit is available to overcome ventilation duct static.
See Power Ventilation Kit Available Static Pressure
table on page 70.
b. The 619F in-ceiling cassette fan coil units may bring in
up to 10% fresh air. This 10% maximum should not be
exceeded. A power ventilation kit is available to over-
come ventilation duct static. See Power Ventilation Kit
Available Static Pressure table on page 70.
c. The 619F in-ceiling cassette fan coil units may have an
extension duct installed. See Static Capability and De-
sign Considerations figures on page 70.
LEGEND
FCU — Fan Coil Unit
OU — Outdoor Unit
Solenoid Valve
(if used)
*High wall systems using 619E009,012.
†Ceiling suspended and in-ceiling cas-
sette systems, and high wall systems
using 619E018,024.
NOTE: Pumping liquid down compensates for pressure build-up by
using a smaller piston size at the FCU.
Lowered Configuration — Indoor Unit
Installed Below the Outdoor Unit
69