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 40QNB009, 012 units use capillary tubes in the outdoor unit for refrigerant
control, and the 40 QNB018, 024 units use the AccuRater piston refrigerant
metering device in the indoor unit.
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 room air circulation when no cooling is
required.
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. Fan speed control shall be user-selectable: high, medium, low, or
microprocessor automatic operation during all operating modes.
12. A time delay shall prevent compressor restart in less than 3 minutes.
G. Filters:
Unit shall have filter track with factory-supplied cleanable filters. (MORE)