DFCH SERIES FAN COIL UNIT
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
***** WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER *****
Altering the product or replacing parts with non authorized factory parts voids all warranty or
implied warranty and may result in adverse operational performance and/or a possible hazardous
safety condition to service personnel and occupants. Company employees and/or contractors are
not authorized to waive this warning.
GENERAL
The manufacturer assumes no responsibility for equipment
installed in violation of any code requirement.
These instructions give information relative to the installation
of these fan coil units only. For other related equipment refer to
the proper instructions.
Material in this shipment has been inspected at the factory and
released to the transportation agency in good condition. When
received, a visual inspection of all cartons should be made
immediately. Any evidence of rough handling or apparent
damage should be noted on the delivery receipt and the material
PRE-INSTALLATION CONSIDERATIONS
1) Determine location for mounting the unit to insure best air
circulation within the room and enabling the indoor fan coil
and outdoor section to be in close proximity of each other.
2) Determine routing of refrigerant tubing and electrical service
between both units.
See Figure 1 and 2 for location of refrigerant tubing and
electrical service entrance positions.
3) A condensate line will need to be routed to drain directly
outdoors onto the ground or connect to an open drain trap.
inspected in the presence of the carriers representative. If
damage is found, a claim should be filed against the carrier
immediately.
FAN COIL UNIT
The installer must adhere strictly to all local and national code
requirements pertaining to the installation of this equipment.
These units are designed to be mounted vertically on an inside
wall or horizontally on a ceiling with zero clearance to combustible materials.
4) Location of unit must be in an area providing adequate
access to the unit since all components must be serviced
from front of the unit. This location must also be capable of
supporting the weight of the unit.
5) Outdoor section must be installed in accordance with its
manufacturers installation instructions.
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Figure 1
CFD81/215243014/3-914/1-13
CFD03/42526401624/1-34
WALL MOUNT (Vertical)
1) Mounting location must allow enough clearance to permit the
removal of screws that secure the cabinet panels.
2) After selecting the location for the unit, remove the return air
panel and coil access panel.
3) Four keyhole slots are provided in the cabinet wrapper for
mounting to the wall. See figure 1 for keyhole locations.
Note: A template with keyhole locations has been
shipped with each unit to simplify pattern location.
Make sure the placement of the unit is such that the
structure will support the weight of the unit.
FLOOR MOUNT (Vertical)
The wall unit may be floor mounted with the addition of the
DFC floor base accessory. The floor base should be screwed
to the bottom of the unit before unit installation. Refer to floor
base installation instructions for mounting instructions.
1) Mounting location must allow enough clearance to permit
the removal of screws that secure the cabinet panels.
2) After selecting the location for the unit, remove the return
air panel and coil access panel.
3) Two keyhole slots are provided in the top corners of the
cabinet wrapper to secure the unit to the wall. See figure
1 for keyhole locations.
4) Refer to Figure 1 for location of refrigerant line and electrical
service entry. Drill the appropriate holes as required.
5) Remove knockouts from unit wrapper where electrical and
refrigerant service will enter. Install 5/8" snap bushing in 5/
8" OD hole where 24 volt thermostat wire will be routed. See
figure 1.
6) Refer to electrical wiring, refrigerant piping and condensate
drain sections for additional information.
7) Mount fan coil to drywall and secure.
Note: A template with keyhole locations has been
shipped with each unit to simplify pattern location.
4) Refer to Figure 1 for location of refrigerant line and electrical
service entry. Drill the appropriate holes as required.
5) Remove knockouts from unit wrapper where electrical and
refrigerant service will enter. Install 5/8" snap bushing in 5/
8" OD hole where 24 volt thermostat wire will be routed. See
figure 1.
6) Refer to electrical wiring, refrigerant piping and condensate
drain sections for additional information.
7) Locate fan coil at desired location and secure cabinet from
two upper keyholes to drywall.
CEILING MOUNT (Horizontal)
1) Mounting location must allow enough clearance to permit
the removal of screws that secure the cabinet panels.
2) Ceiling mounting structure must be sufficient enough to
support the unit weight.
3) After selecting the location for the unit, remove the return air
panel, coil access panel and drain pan assembly.
4) Four keyhole slots are provided in the cabinet wrapper permitting the unit to be mounted to the ceiling.
See figure 1 for keyhole locations.
Note: A template with keyhole locations has been
shipped with each unit to simplify pattern location.
Construction of the ceiling and method of attaching bolts must be such that it will support the
weight of the unit.
5) Refer to Figure 2 for location of refrigerant line and
electrical service entry. Drill the appropriate holes in
ceiling and framework as required.
6) Remove knockouts from unit wrapper where electrical and refrigerant service will enter. Install 5/8" snap
bushing in 5/8" OD hole where 24 volt thermostat wire
will be routed. See figure 2.
7) Refer to electrical wiring, refrigerant piping and condensate drain sections for additional information.
8) Mount fan coil to ceiling, secure and check to make
sure unit is level.
Note: Unit must be level to insure proper condensate drainage.
Warning: Make sure proper bolts and washers are
used that will prevent disengagement through the
keyholes.
Figure 2
ELECTRICAL
All wiring must comply with local and national code requirements. Units are provided with wiring diagrams, located on
electrical compartment panel, and nameplate data to provide
information required for necessary field wiring. A 7/8" AND 1-1/
8" knockout is provided as entry points for field wiring. Refer to
figure 1 and 2. If 1-1/8" knockout is used install snap bushing in
hole and route flex conduit through snap bushing to 7/8" hole in
electrical box and secure.
REFRIGERANT PIPING
Entry points for the refrigerant lines are shown in Figure 1 and
2. These lines must be sized in accordance with the outdoor unit
manufacturers recommendations. The evaporator coil is factory supplied for sweat connections on the liquid and suction
lines. A short preformed 90 degree copper elbow is also factory
supplied to facilitate the connection to the suction line at the
evaporator.
To ease the installation of the refrigerant lines to the evaporator, remove the drain pan by sliding it out of the fan coil unit.
REFRIGERANT CHARGING
These units are provided with a Class 2 transformer for 24-volt
control circuits. Should any add-on equipment used also have
a Class 2 transformer furnished, care must be taken to prevent
interconnecting outputs of the two transformers by using a
thermostat with isolating contacts.
Upon completion of refrigerant connections check all connections for leaks. In addition the suction line must be fully insulated
to prevent sweating of refrigerant line within the unit. A length of
Armaflex insulating tape has been shipped with the unit for this
propose.
Reinstall drain pan to original position.
Refer to outdoor manufacturer installation instructions for initial
charging instructions. Even though the outdoor unit is factory
precharged, the charge must be checked and adjusted if required.
Allow sufficient running time in the cooling cycle, 20 to 30
minutes, for system to balance. At this time you must check the
sub-cooling of the liquid refrigerant at the outdoor unit to insure
a proper liquid seal is present at the expansion valve.
CONDENSATE DRAIN LINE
Drain line installation must adhere to all code requirements.
Wall or Floor Mount (Vertical)
Figure 1 shows the location of the condensate knockouts.
Install a rigid (copper) drain line connected to the drain pan
nipple (5/8" OD). The condensate line should drain directly
outdoors or connect to an open drain trap. An open drain trap
is required to prevent any possible sewer gas from entering the
fan coil unit through the drain tube.
It is also necessary to have adequate slope in the drain line
from the fan coil unit to the open trap or outdoors to ensure
proper drainage.
Ceiling Mount (Horizontal)
Figure 2 shows the location of the condensate knockouts.
The following requirements should be met to insure proper
drainage of condensate from the pan in the horizontal position:
1) Fan coil must be installed level.
At outdoor conditions between 80 to 95 degrees the system
should be charged to a sub-cooling level of 8 to 10 degrees at
the outdoor unit. This charge will permit the expansion valve to
operate properly at a superheat level of 6 to 8 degrees. Superheat at the outdoor unit will be in the range of 12 to 18 degrees.
To increase sub-cooling increase refrigerant charge.
To decrease sub-cooling decrease refrigerant charge.
2) Install a rigid (copper) drain line connected to the drain pan
nipple (5/8" OD) and extending out the rear of the cabinet.
This line must be sloping down slightly from the drain pan to
the rear of the cabinet.
3) The rigid drain line should drain directly outdoors or connect
to an open drain trap. An open drain trap is required to
prevent any possible sewer gas from entering the fan coil unit
through the drain line.
It is also necessary to have adequate slope in the drain line
from the fan coil unit to the open trap or outdoors to ensure
proper drainage.
Warning: The condensate pan will overflow if drain line
is higher than drain pan at any point.
4) A condensate pump must be installed if the drain line is to be
run above the drain pan elevation. The pump must be
located external to the fan coil unit and lower than the drain
pan in order to operate properly. (See condensate pump
installation instructions.)
THERMOSTAT WIRING
1) Mounting location of thermostat should be on an interior wall
approximately 4-5 feet above the floor, which will not be
subjected to drafts and is not in the direct path of the
discharge airstream of the unit.
2) Make sure 5/8" snap bushing has been installed in 5/8"
knockout on cabinet wrapper to protect low voltage wiring.
Route thermostat wire through bushing and raceway to the
low voltage junction box.
AIR LOUVER ADJUSTMENTS
The discharge air louvers may be adjusted in one or several
positions to direct airflow to one or more areas of the room.
To adjust, pull louver straight out from recessed position and
rotate louver to desired direction then reinsert into recessed
position.
SYSTEM START-UP
1) Prior to start-up, inspect the blower to assure the wheels turn
freely without rubbing on the housing.
2) This fan coil is equipped with a 3-speed motor which gives
the consumer the option of High-Med or Med-Low fan
speeds. The unit is factory set at High-Med, however if
installation requires a quieter application, remove blower/
motor wiring plug and insert into lower socket for Med-Low
speeds.
Note: If unit has electric heat, refer to wiring diagram on
unit for proper fan speed combination.
WARNING: All panels must be installed before operat-
ing unit.
3)
System check - set thermostat system switch to "Off"
position and fan switch to "Auto" position. Apply power to
3) Wire low voltage circuit as indicted on unit wiring diagram.
For units without electric heat option, do not connect thermostat wiring to "W" terminal at thermostat or to "W" lead (white)
at low voltage junction box.
Note: Do not pull louver out further than required during
adjustment for spring may become stretched.
both the indoor and outdoor units.
4) Set fan switch to "On", fan should operate.
5) Return fan switch to "Auto" position. Set system switch to
"Cool" and lower thermostat set point to coldest setting.
Outdoor unit should energize as well as fan coil.
6) Set system switch to "Heat" and raise thermostat to a set
point warmer than room temperature. Outdoor unit should
energize as well as fan coil. If unit has electric heat, raise
thermostat to the warmest set point, within a minute the
electric heat should energize.
7) Return system switch to off position.
MAINTENANCE
The only maintenance required to be performed is to keep the
air filter clean. Allowing dust to form on the filter will eventually
cause the unit to loose efficiency. Once a month check and
clean filter if required.
The filter is a permanent type and may be removed and
washed with a garden hose. Filter should be completely dry
before reinstalling.
11/00L2481
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