Carrier 50ZH Series - ARI Cooling Capacities and Efficiencies; Cooling Capacity and Efficiency Ratings; Physical Data and Specifications; Unit Weight and Refrigerant Charge

7. Check that airflow across the heater is at or above the
minimum recommended CFM requirement (See Table 2).
Adjust indoor blower heat speed as required.
8. Any modifications or repairs to this equipment without written
permission from the factory will be done at the installer’s own
risk and expense.
TROUBLESHOOTING
1. Fuses -Malfunction will interrupt power to the unit. Check for
cause of failure, replace fuses.
2. Limit Switch -Malfunction prevents heating element(s) from
being energized. Replace switch if malfunction occurs.
3. Contactor -Malfunction will not allow heater to energize.
Replace faulty contactor. Do not attempt to replace coil or
dress contacts.
PACKAGE CONTENTS
ELECTRIC HEATER PACKAGE CONTENTS
1. Heater assembly.
2. UPC heater label.
3. Installation Instructions.
4. Identification label.
5. Schematic on lid door for all fused units.
6. Schematic on sticker to be placed inside unit panel for
non-fused units (See Fig. 2).
7. Wire connectors (3).
8. Wire ties–6″ (5).
9. Screws #10B (12).
10. Splice Connectors (4).
11. Strip Gasket (8 in. x 2-1/4 in.)–Fused models only (1).
12. Hinged lid with latch–Fused models only (1).
13. Ground Lug (1)–See Fig. 2.
TABLE 2—Minimum Airflow for Heater Operation
UNIT
MINIMUM AIRFLOW (CFM)
UNIT SIZE
024 030 036 042 048 060
HEAT
PUMP
600 750 900 1050 1200 1500
ELECTRIC
COOLING
600 750 900 1050 1200 1500
3