Application Data; Unit Selection; Unit Mounting (Indoor); Unit Mounting (Outdoor) - Carrier 40MVC Product Data

APPLICATION DATA

UNIT SELECTION

Select equipment to either match or be slightly less than anticipated
peak load. This provides better humidity control, fewer unit cycles,
and less part- -load operation.
For units used in spaces with high sensible loads, base equipment
selection on unit sensible load, not on total anticipated load. Adjust
for anticipated room wet bulb temperature to avoid undersizing
equipment.

UNIT MOUNTING (INDOOR)

Unit leveling - - For reliable operation, units should be level in all
planes.
Clearance - - Provide adequate clearance for airflow as shown in
Fig. 2.
Unit location - - Select a location which will provide the best air
circulation for the room.
These units should be positioned as high as possible on the wall for
best air circulation. The unit return and discharge should not be
obstructed by furniture, curtains, or anything which may cause unit
short cycling or air recirculation. Place the unit in the middle of the
selected wall (if possible). Use an outside wall, if available, to
make piping easier, and place the unit so it faces the normal
location of room occupants.

UNIT MOUNTING (OUTDOOR)

Unit leveling - - For reliable operation, units should be level in all
planes.
Clearance - - Minimum clearance, as shown in Fig. 3, must be
provided for airflow. The condensing units are designed for
free- -blow application. Air inlets and outlets should not be
restricted.
Unit location - - A location which is convenient to installation and
not exposed to strong wind. If unit is exposed to strong winds it is
recommended that a wind baffle be used. Contact your Carrier
representative for drawings.
A location which can bear the weight of outdoor unit and where
the outdoor unit can be mounted in a level position.
Do not install the indoor or outdoor units in a location with special
environmental conditions. For those applications, contact your
Carrier representative.
MOUNTING TEMPLATE
The fan coil units are furnished with mounting to mark the location
of the wiring, and refrigeration line hole locations.
SUPPORT
Adequate support must be provided to support the weight of all fan
coils. Refer to the Physical Data section for fan coil weights, and
the base unit dimensional drawings for the location of mounting
brackets.
SYSTEM OPERATING CONDITIONS
Cooling operating range:
Maximum
DB
_F (_C)
125
Outdoor Unit
(51.67)
85
Indoor Unit
(29.44)
Heating operating range:
Maximum
DB
_F (_C)
75
Outdoor Unit
(23.89)
80
Indoor Unit
(26.67)

LOW AMBIENT OPERATION

Units can operate in cooling down to 55_F (12.78_C) under all
conditions without a low- -ambient kit.
Units equipped with accessory low- -ambient kits should also be
equipped with field fabricated (drawings available) wind baffle and
crankcase heater to prevent refrigerant migration during
compressor off cycle.

METERING DEVICES

These units have capillary tube metering devices in the outdoor
unit.
DRAIN CONNECTIONS
Install drains to meet local sanitation codes. If adequate gravity
drainage cannot be provided, unit should be equipped with
accessory condensate pump. High wall fan coil unit condensate
pumps have a maximum lift of 10' (3.05 m) for 9k and 12k units
and 25' (7.62 m) for 18k and 24k units.
See physical dimension tables for drain sizes.
NOTE: High wall fan coil units have internal condensate traps.
A trap is not required.
Drain connections may be routed through alternate locations on
most fan coils as shown in Fig. 4.
Pipe holder
Pipe cover
2 Right back piping
1
Right piping
Size 012
Fig. 4 – Piping Locations
20
Minimum
WB DB WB
_F (_C) _F (_C) _F (_C)
55
--- ---
(12.78)
72 64 52
(22.22) (17.78) (11.11)
Minimum
WB DB WB
_F (_C) _F (_C) _F (_C)
67 5
50% RH
(19.44) ( ---15)
55
--- ---
(12.78)
Pipe cover
4 Left piping
3
Left back piping
Only
A07344