Product data

D. Coil:
Coil shall be copper tube with aluminum fins and galvanized steel tube sheets. Fins
shall be bonded to the tubes by mechanical expansion. A drip pan under the coil shall
have a drain connection for hose attachment to remove condensate. Condensate pan
shall have internal trap and auxiliary drip pan under coil header.
Note: The units use the AccuRater piston refrigerant metering device in the indoor
unit (for cooling) and at the outdoor unit liquid line service valve for heating.
E. Motors:
Motors shall be open drip-proof, permanently lubricated ball bearing with inherent
overload protection. Fan motors shall be 3-speed.
F. Controls:
Controls shall consist of a microprocessor-based control system which shall control
space temperature, determine optimum fan speed, and run self diagnostics. The
temperature control range shall be from 64 F to 84 F. The unit shall have the
following functions as a minimum.
1. An automatic restart after power failure at the same operating conditions as at
failure.
2. A timer function to provide a minimum 24-hour timer cycle for system Auto.
Start/Stop.
3. Temperature-sensing controls shall sense return-air temperature. Indoor-air
high discharge temperature shutdown shall be provided.
4. Indoor coil freeze protection.
5. Wireless infrared remote control to enter set points and operating conditions.
6. Auto Stop features shall have integral setback control.
7. Automatic airsweep control to provide on or off activation of airsweep
louvers.
8. Dehumidification mode shall provide increased latent removal capability by
modulating system operation and set point temperature.
9. Fan only operation shall provide room air circulation when no cooling is
required.
10. Diagnostics shall provide continuous checks of unit operation and warn of
possible malfunctions. Error messages shall be displayed at the unit and at the
remote controller.
11. An indoor to outdoor thermistor connection cable shall be provided with the
fan coil unit.
12. Fan speed control shall be user-selectable: high, medium, low, or
microprocessor automatic operation during all operating modes.
13. A time delay shall prevent compressor restart in less than 3 minutes.
14. Automatic heating-to cooling changeover to provide automatic heating and
cooling operation. Control shall include deadband to prevent rapid mode
cycling.
15. Demand defrost shall be provided and shall minimize defrost cycles by
internally adjusting defrost timing based on frost accumulation.
16. Indoor coil high temperature protection shall be provided to detect excessive
indoor discharge temperature when unit is in heat pump mode. (MORE)