Operation
Table 16. User inputs
Input Function
TB1
+Remote display communications link (+)
-Remote display communications link
TB2
EN | Energy management |
| system input |
|
|
VT | Ventilation input |
OReversing valve (class 2 thermostat)
GL | Low fan speed (class 2 |
| thermostat) |
|
|
GH | High speed fan (class 2 |
| thermostat) |
YCool (class 2 thermostat)
W Heat (class 2 thermostat)
R 24VAC common1
C | Ground2 |
|
|
RF | Remote fan relay output |
|
|
Notes:
1.Connection to R enables input functions W, Y, GL, GH, O,VT, and/or EN.
2.Connect 24VAC, 3VA maximum Remote Fan Control Relay to RF and C
Remote Fan Operation
PTACs can operate a remote fan to provide conditioned air to additional rooms or areas that are not well ventilated. The remote fan operates any time the PTAC indoor fan is operating.
The remote fan requires a 24 VAC, 3 VA maximum relay that connects to the control board RF and C terminal user inputs. The relay and remote fan are field supplied. Refer to the wiring diagrams section for wiring details.
Vent Control
Vent control draws fresh air into the conditioned area to provide ventilation when the indoor fan is operating. However, this may increase heating cooling loads and operating costs.
To obtain access to the vent control, remove the cabinet front and locate the vent control lever on the left side of the chassis. Push the vent control lever up to open the vent or down to close.
The unit ships with the vent door closed and secured by a screw.
CAUTION Freezing Temperatures!
Do not allow liquid refrigerant to contact skin. If it does, treat the injury similar to frostbite. Slowly warm the affected area with lukewarm water and seek immediate medical attention. Direct contact with liquid refrigerant may cause minor or moderate injury.
Air Discharge Grille
The discharge grille can be adjusted to expel air at either a 15° or 40° (40° default) angle. Figure 18.
To change the discharge air airflow angle:
1.Remove the front cabinet.
2.Position the front cabinet so that the backside is accessible.
3.Remove the four screws which secure the discharge air grille to the cabinet front with a phillips- head screwdriver. See Figure 31.
4.Rotate the grille 180°
5.Reinstall the screws securing the discharge air grille to the cabinet front. Reinstall the cabinet front on the unit.
Screws
Figure 18. Discharge air grille
22 |
