York YECFC Instruction manual

YECFC Fan Coil Unit
Installation, Operation &
Maintenance Manual
FORM NO.: 6A4Y-A01A-NE-EN
Air Flow：150~750L/S

Contents
Contents
1. Overview of Product 1
1.1 Explanation of Models 1
1.2 Outlines & imensions & Weight 1
1.3 Nameplate 6
1.4 Characteristics of Fan Coil Unit 6
1.5 Working Operating Range of Fan Coil Unit 6
2. ransportation & Installation 7
2.1 Transportation 7
2.2 Acceptance 7
2.3 Storage 7
2.4 Lifting of the Unit 7
2.5 Points for Attention before Installation 7
2.6 Points for Attention during Installation 8
2.7 Installation 8
3. Startup & Running of Product 9
3.1 Check before Start Up 9
3.2 Electric Connection 10
3.3 Cold Area Operation 11
4. Maintenance & Service of Product 11
4.1 Air Filter 11
4.2 Cooling Coil and Heating Coil 11
4.3 Fan and Motor Assemblies 11
5. Failure Analysis 12
5.1 Low Air Flow Rate 12
5.2 High Air Flow Rate 12
5.3 High Noise and Vibration Level 12

Overview of product
1
1. Overview of Product
1.1 Explanation of Models
YORK Corporation can supply many types and models of fan coil unit. Users can select applicable products
according to their own taste, the installation space and position, etc. etailed types and models are explained as
below.
1.2 Outlines & Dimensions & Weight
01&02 3/4R Model Cooling

Overview of product
2
01&02 A/CR Model Cooling and Heating
03 3/4R Model Cooling

Overview of product
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03 A/CR Model Cooling and Heating
04&05 3R Model Cooling

Overview of product
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04&05 4R Model Cooling
04&05 AR Model Cooling and Heating

Overview of product
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04&05 CR Model Cooling and Heating
Model A B C E W H G
Plenum Conn
im
(mm x mm)
Return Plenum
Conn im
( x F)
YECFC-01CB-3(4/A/C) 725 755 1030 233 558 233 130 775 x 130 750 x 190
YECFC-02CB-3(4/A/C) 1005 1035 1310 233 558 233 130 1055 x 130 1030 x 190
YECFC-03CB-3(4/A/C) 1505 1535 1810 233 558 233 130 1555 x 130 1530 x 190
YECFC-04CB-3(4/A/C) 1605 1635 1910 317 558 317 214 1655 x 214 1630 x 274
YECFC-05CB-3(4/A/C) 1820 1850 2125 317 558 317 214 1870 x 214 1845 x 274
Notes:
1. Facing the air outlet, the left type unit has pipes on the left side, right type unit opposite.
2. Filter frame is provided as standard. Filter media is provided as an option.
3. Chiller water inlet/outlet connection size for 04/05 4/C Rows unit is R1". For other unit, the chiller water inlet/outlet connection
size is Rc3/4".
4. .Inlet/outlet hot water pipe diameter for 4 pipes unit is Rc 1/2".
Unit Weight, kg
Model
Rows 01 02 03 04 05
3 Rows 20.8 24.8 33.4 43.8 52.8
4 Rows 21.5 25.7 34.7 47.9 54.9
3+1 Rows 21.5 25.7 34.7 47.9 54.9
4+1 Rows 22.3 27.0 36.3 49.1 57.8
Notes: Unit weight is without water content.

Overview of product
6
1.3 Nameplate
You can get the unit information and simple
performance parameters from the nameplate.
1.4 Characteristics of Fan Coil Unit
 Special hyperbolic design fins enhance heat
transfer efficiency Fins spacing is optimized to
promote heat exchange efficiency and minimize
air pressure drop.
 All fans are statically and dynamically balanced,
forwardly curved, W I centrifugal type. The
EC fan motor assembly is designed for
low-noise operation, while having compact
dimensions and permitting easy installation and
replacement.
 High efficiency electronically commutated (EC) motors is fitted as standard on all units. Motor can be
regulated by 0-10V C signal supplied by a BMS, thermostat or C controller. The motor is resiliently
mounted, self aligning and oiled for life.
 YECFC fan coil units have a variable speed driven permanent magnet motor and as such have an extremely
wide operating envelope. When fan air supply quantities and external static resistances are extremely low,
noise generated by air movement is significantly decreased. Under such circumstances, when air movement
noise is extremely low, motor noise may become audible in the form of a very low level background hum.
This condition is normal with this model of EBM motor when operating at a control voltage of below 4V.
 When units are installed into a ceiling concealed non-ducted application with minimal external static
resistance, it may be desirable to limit the minimum control voltage to 4 volts if low levels of motor noise is
of concern.
 The installing contractor is responsible to commission fan coil units with minimum and maximum control
voltage settings commensurate with the units design operating range.
 The fan and motor performance classes exceed the new ErP15 (European Energy- related Products irective)
irective.
 Water supply and return header is made of a single forged threaded brass connector. The header provides
water distribution through the water circuits for high heat exchange efficiency and reduced water pressure
drop.
 Coils are designed for a wide elta T with chilled water application typically 7-10 degrees C and hot water
typically 15-20 degrees C.
 The coil maximum working pressure is 1.6Mpa. Each coil is leak tested by a 2.8Mpa nitrogen overpressure
test.
 Optimal design of condensate drain pan can effectively drain condensate water and reduces the growth of
bacteria and microbial growth. The drain tray is stainless steel to avoid corrosion and is extended 100mm
beyond the casing to capture any condensate from the chilled water control valve.
 The external casing is made of galvanized steel. Insulation is pressed and adhered on inner wall of the panel,
which avoids cold bridge. The underside of the drain pan is insulated with primary hot-press molded insulation.
 All factory wiring is provided to terminals located in a metallic box for customer connection.
1.5 Working operating range of fan coil Unit
 It is recommended the temperature of chilled water should not be lower than 5℃.
 It is recommended the temperature of hot water temperature should not be higher than 80℃.
 Conditioned and treated water quality is required.
 For maximum operating life the running temperature≤40℃ and relative humidity≤95%.

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2. ransportation & Installation
2.1 ransportation
Units are normally shipped ex-works. They are inspected, tested, and packaged prior to dispatch, carefully loaded
into containers, shipped to country of destination, unloaded, and delivered to jobsite.
Immediately upon receipt at jobsite, inspection should be made for any damage, which must be reported to
Johnson Controls within 24 hours of receipt of goods.
When moving the fan coil unit, please handle with care and prevent the coil water inlet, outlet and drain pipes
from getting bent or damaged. Use only approved lifting equipment. o not carry the unit by the fan or motor
assembly to avoid distortion.
Package for YECFC01~03 Units Package for YECFC04&05 Units
2.2 Acceptance
All items must be checked against customer purchase order, delivery docket, and submittal drawings for
correctness and any claims for non-compliance or short supply reported to Johnson Controls within 72 hours of
delivery.
2.3 Storage
If the unit is stored on the jobsite, it should be protected against exposure to the elements.
Specifically units should be securely protected from theft, accidental damage, water ingress, moisture damage,
rusting, or dust.
2.4 Lifting of the Unit
uring the installation process, be careful to prevent the unit from any damage due to improper lifting and rigging.
Use only approved lifting equipment. Safety should always be a priority. Only authorized lifting equipment and
trained installers should be used. Equipment should be installed in accordance with all national safety codes.
2.5 Points for Attention before Installation
Before the unit is installed, the following should be verified during the construction of the building:
1. Water Supply
2. Power Supply
3. Supply air, return air, and outside air ducting (if applicable)
4. Ceiling Mounting points
5. Service Access

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2.6 Points for Attention during Installation
For ceiling installation, hang the unit on threaded rods using the mounting holes provided. Alternately rubber
isolators or spring mounts can be used. YECFC units exhibit low levels of unit vibration and have high levels of
balance as each direct drive EC fan / motor assembly is provided as a single manufactured and tested entity from
the supplier.
Ensure correct spacing and alignment of mounting points directly above the mounting points on the unit chassis.
This is important where the suspension points have been fixed into the concrete slab directly above the unit.
uring the installation, be careful to avoid building materials damaging unit panels or components.
o not remove protective covers from the coil connections until the unit is ready to be piped up.
Before the unit starts operation, any debris in the drain tray and the drain piping should be removed.
Ensure sufficient side clearance to enable air filter removal. Allow at least 600mm service clearance.
Installation of CB series-ceiling concealed type unit: Insert the reserved screws on ceiling to the six kidney-shaped
holes.
2.7 Installation
2.7.1 Water Piping
Flow and return water pipes IN and OUT are marked on the unit and water pipework should be connected through
flexible couplings to avoid transmission of vibration and to allow for pipework expansion and contraction.
YECFC water connections incorporate male pipe threads as scheduled in the table in this manual.
o not overtighten the water connections. Torque should not exceed 50 N.M so as to avoid breakage. Significant
care should be taken when attaching water pipes or water valves to the coil connections.
In order to confirm the unit is not damaged during transportation, leakage inspection (1.0Mpa) for coil is required
before installation.
Use a pipe wrench to restrain the pipe connections of the coil when connecting external pipework.
2.7.2 Piping Support
The weight of all connecting water pipes should be independently suspended and should not be borne by the unit.
Provide a minimum of 600mm service access to all water inlet, outlet and drain pipe interfaces.
2.7.3 Determination of Water Handing of the Unit
The water inlet and outlet pipe interfaces can be arranged in the right or left side of the unit. When viewing from
the unit air outlet (or reverse the air flow direction), if the water inlet and outlet pipes are at the right side of the
unit, the unit is called a Right-handed Unit; conversely, it is a Left-handed Unit.
Ensure correct handing of the unit to be installed.
2.7.4 Condensed Water Drainage
Install the YECFC fan coil level using a spirit level. Adjust the hanger rods or mounting bolt tension to achieve
minimum 5 mm side to side slope towards the drain outlet pipe. o not install the unit with a slope away from the
drain outlet pipe.
The external drain piping should slope downward and away from the fan coil unit.
Note: YECFC units are a “blow through” design.
2.7.5 Water reatment
Chilled and hot water systems must be filled with clean and properly treated water.
Water circuits must be adequately flushed to remove construction debris.

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Poor quality water must be adequately filtered to remove impurities.
Water treatment chemicals shall be applied to prevent scale and corrosion of water circuits.
Water treatment shall be carried out by authorized professionals and shall be tested on a periodic basis.
2.7.6 Air Duct Connection
Where YECFC are used in a ducted application, the connecting between the return air duct and the return air
opening or return air plenum and that between the air outlet flange and the supply air duct or plenum must be
flexible. The hard connection between the unit and the air outlet flange must be prohibited. uring the installation,
all air duct(s) should be provided with adequate support. uctwork should not be supported directly by the fan coil
unit.
2.7.7 Electrical Connection
The YECFC is designed for single phase power. The EC fans include integral variable speed drives.
220-240 volt power wiring including neutral and earth (Ground) is required. The supply must have a suitable
power isolation switch mounted nearby to the fan coil unit, and appropriately labelled. Wiring must be in
accordance with national codes and standards.
2.7.8 Control requirements
YECFC features a control terminal strip for 0-10V C speed control.
YECFC incorporates variable speed fans that operate from a 0-10V C control signal.
Fan speed can be continuously varied between maximum and minimum values based on the control voltage limits
established in the control device.
The 0-10v control signal can be provided by a building automation system (such as Johnson Controls Metasys) or
from an advanced thermostat with a 0-10v variable speed fan output (such as Johnson Controls TEC3000 range).
Minimum control voltage would typically be set between 2 and 4.5 volts C to achieve minimum fan airflow
requirements.
Maximum control voltage would be typically set between 6 and 10 volts C to achieve design fan airflow at
design fan static pressure.
Note: maximum control voltage should not permit excess coil velocity greater than 2.5 m/s.
When YECFC are installed in applications with a high percentage of outside air which may contain higher levels
of humidity, the maximum control voltage shall be set to avoid moisture carryover issues.
Note: for jobsites where remote electric heaters are installed, minimum airflow settings should enable the heaters
to operate without safety device intervention due to excessively low airflow.
Unit performance of airflow and static pressure vs control voltage can be found in the YECFC catalog.
3. Startup & Running of Product
3.1 Check before Start up
Check the YECFC unit before it is started:
1. Remove any foreign material from the interior and exterior of the unit.
2. Check all components are securely fixed.
3. Check fans can rotate freely.
4. Check power and control wiring and available power is correct.
5. Check that the condensate drain system is installed and functioning correctly.
6. Perform air bleed and system water pressure tests.
7. Check whether the air filter has been installed in place.
8. Check whether the duct has been installed properly (ducted unit applications).
9. Check the water flow is balanced to design requirements.
10. Check the BMS or thermostat are connected and set to correct airflow limits and set-point temperatures.

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3.2 Electric Connection
Before wiring, please check voltage, frequency, and phase and confirm whether they are correct. Power connection
should be installed according to electric schematic diagram. Earth lead should be connected firmly. Wiring
diagram is as Fig.1. The recommended wire size is as below sheet.
Several different models of unit sharing a single temperature controller are not prohibited.
Wire Size recommended is based on 40℃ ambient temperature. Only copper wire can be used.
Please follow the local electrical codes and wiring standards in all cases.
A circuit breaker should be installed to the supply power.
Fig.1 Wiring Diagram:
Detail Connection for –X B2:
Model Power Wire
Size
Recommended Breaker
(with earth leakage
protection)
YECFC01 230V ~50/60Hz 1.0 mm
2
5A 2P C Type
YECFC02 230V ~50/60Hz 1.0 mm
2
5A 2P C Type
YECFC03 230V ~50/60Hz 1.0 mm
2
5A 2P C Type
YECFC04 230V ~50/60Hz 1.0 mm
2
10A 2P C Type
YECFC05 230V ~50/60Hz 1.0 mm
2
10A 2P C Type
!

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Notes:
1.* Speed control from customer: 0~10V C control signal from customer should be connected to terminal ‘AI’ and ‘0V’. ’AI’
for ‘+’,’0V’ for ‘-’. 1V for min speed and 10V for max speed.
2. Speed feedback to customer: pulse type signal (duty ratio is about 50%), open collector, 1 pulses per revolution, electrically
isolated. Fan1 feedback via terminal ‘Tach’ and ‘0V’, Fan2 feedback via terminal ‘Tach2’ and ‘0V’. R (resistances, e.g. 10K)
and C power (e.g. C 24V) should be supplied by customer.
3. +10V to customer: terminal ’10V’ and ‘0V’ provide a C 10V power source(1.1 mA) .The EC fans will run at full speed if
‘AI’ and ’10V’ were short wired , but this function can’t be used at the same time with function described in item 1.
The item marked as * is must be wired by customer, and the other 2 items are optional.
3.3 Cold area operation
When operating the fan coil unit in climates where ambient temperatures could result in coil freezing, ensure that
the heating energy source is enabled, heating water is up to temperature, and heating water flow is available prior
to stating the unit. Once the unit is enabled, open the outside air damper as required. This is to prevent coil frosting
which may damage the unit. This is particularly important for units with air on coil conditions based on a high
percentage of outside air.
For units that require seasonal drainage of water from the coils, when stopping the unit, close the fresh air damper
first, isolate the power to the fan(s), and then isolate the water supply to the unit. Use the water piping drain point
to drain the water in the coils to prevent damage from potential freezing.
4. Maintenance & Service of Product
4.1 Air Filter
Air filters should be checked and cleaned, or replaced, as necessary on a periodic basis.
Typically inspect air filters every 3 months, noting that filter cleaning and replacement frequency is dependent on
run hours and outside air quality.
The filter can be removed from the unit by sliding the filter out of the return air plenum filter track.
Filters are either washable or throwaway type. For washable filters, clean it per the manufacturer’s instructions,
dry it as required, and reassemble it back to the filter frame.
4.2 Cooling Coil and Heating Coil
1. On an annual basis, observe for dirt accumulated on the coil heat exchanger and clean coil fins it if required
(it is recommended to clean it with the low pressure compressed air from the air outlet side).
2. Ensure the coil fins are not damaged. Comb coil fins as required.
3. If there is evidence that air has entered the water system, use the system air vent to bleed air out of the
system.
4. When fan coil unit is non-use, the coil should be filled with water in summer so as to avoid rust corrosion;
water in coil should be drained out in winter so as to avoid copper pipes cracking.
5. If any coil needs to be replaced, consult with the manufacturer.
4.3 Fan and Motor Assemblies
On an annual basis inspect the EC fan /motor assemblies.
1. Before any work is carried out on the fan or motor, isolate the power and lockout / tagout with appropriate
warning signs.
2. Remove the appropriate ductwork to gain access to the fan/motor assembly located in the unit’s air plenum.
3. Check whether the fan can rotate freely.
4. Clean the fan blades as required.
5. The normal service life of the fan bearing used in the YECFC unit can be up to 75,000 working hours without
service. Bearings are of the sealed type.
6. Check the tension of all motor terminals
7. If a motor needs to be replaced, consult with the manufacturer.

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5. Failure Analysis
5.1 Low Air Flow Rate
The actual static pressure needed is greater than the design static pressure and. Thus, the air flow rate is lower than
the design value.
Increase fan speed as required.
5.2 High Air Flow Rate
The actual static pressure needed is lower than the design static pressure, making the air flow rate higher than the
design value. The increased air flow rate increases coil velocity and increased unit noise level.
Increased air flow rate leads to risk of moisture carryover where coil face velocity exceeds 2.5 m/s.
ecrease fan speed as required.
5.3 High Noise and Vibration level
Check for correct unit isolation.
Verify that there are no vibration paths via duct or pipe to the structure.
Verify there are correctly installed flexible connections between unit, the return air, and the supply air ductwork.
Verify flexible connections are correctly installed to connecting water pipes.
Ensure the unit is correctly hung, and any installed vibration isolators are installed and functioning correctly.

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YORK Guangzhou Air Conditioning & Refrigeration Co., Ltd.
Phone: [phone]
Fax: [phone]
© 2019 Johnson Controls, Inc. www.johnsoncontrols.com
FORM NO.: 6A4Y-A01A-NE-
EN
SUPERSEDES:
6
A4
Y
-
A0
1A
-
N
D
-
EN
*
Johnson Controls is committed to the continuous product improvement.
Please note the product design may change without notification.
**
This manual is for reference only. For the specific product specifications and performance,
Please r
efer to the purchase agreement.
SAP NO.:5172735

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