Installation guide

Table 6_Two-Speed Compressor

(Winding Resistance at 70°F ± 20 °)

WINDING 024 036-037 048

Start (S-C) 2.280 1.8500.5521.459

Run (R-C) 0.770 0.745

060

0.740

0.356

Compressor Control Contactors

Low and high capacity contactor coils are 24 volts. The electr_mic

control board controls the operation of the low speed tC-L_ and the

high speed (C-H) contactors.

TEMPERATURE THERMISTORS

Thermistors are electronic devices which sense temperature. As

the temperature increases, the resistance decre,x_es. Tbemtistors

are used to sense outdoor ambient and coil temperature. Refer to

Fig. 13 tbe resistance values versus temperature.

If the outdoor ambient or coil thermistor should fail. a fault code

appears at two-speed control.

IMPORTANT: Outdoor Air Thermistor Placement

Mount outdoor air thermistor underneath unit base pan lip on

control box side of the unit as shown in Fig. 14. Attach to base pan

with adhesive tape. A small piece of TXV bulb insulation tape may

be used.

IMPORTANT: If outdoor air thermistor is not properly placed

underneath bose pan, unit may see nuisance thermistor out of

frame faults.

Step 1a--Final Checks

IMPORTANT: Before leaving job, be sure to do the following:

1. Ensure that all wiring and tubing is secure in unit before

adding panels and co\ers. Securely fasten all panels and

covers.

2. Tighten service valve stem caps to 1/12-turn past finger tight.

3. Leave Owner's Manual with owner. Explain system operation

and periodic maintenance requirements outlined in manual.

4. Fill out Dealer Installation Checklist and place in customer

file.

CARE AND MAINTENANCE

For continuing high performance and to minimize possible equip-

ment failure, periodic maintenance must be performed on this

equipment. Frequency of maintenance may vary depending upon

geographic areas, such as coastal applications.