York YECFC, Инструкция по установке, эксплуатации и обслуживанию

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Product Conveyance Installation
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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. During the installation,
all air duct(s) should be provided with adequate support. Ductwork 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 DC speed control.
YECFC incorporates variable speed fans that operate from a 0-10V DC 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 DC to achieve minimum fan airflow
requirements.
Maximum control voltage would be typically set between 6 and 10 volts DC 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.