Electrical Connections; Powering Up; Maintenance - Carrier 42AM serie Installations-, Betriebs- Und Wartungsanleitungen

8 - ELECTRICAL CONNECTIONS

Before connecting the unit to the mains, ensure that the voltage matches that given on the unit's data plate (230V - 50 Hz for
single-phase and 400V - 50 Hz for three-phase).
The unit must be connected to earth.
CIAT shall not be liable for incidents resulting from faulty or non-existent earthing.
■ 42AM air heater and 42AMA destratifier:
- Direct connection to AC Single-Phase and AC Three-Phase fan motor assembly
- Diagram 7433969
- AC single-phase fan motor assembly
- 42AM-AC + 1-speed proximity switch + RTR + Autotransformer connection → Diagram 7528225
- 42AM-AC + 1-speed proximity switch + AC thermostat (type A 33TA-AC01 thermostat) + Autotransformer connection
→ Diagram 7528226
- EC single-phase fan motor assembly
- Direct connection → Diagram 7489644
- 42AM-EC +1-speed proximity switch + 3V-EC thermostat (type C 33TC-EC01) connection → Diagram 7528227
- 42AM-EC+SINGLE-PHASE EC BOX wiring diagram → Diagram 7512267
- 42AM-EC+SINGLE-PHASE EC BOX field connection → Diagram 7568152
■ 42AM air heater:
- 3-phase fan motor assembly
- 2-speed in MANUAL mode schematic diagram (42AM-AC + 2-speed proximity switch + LS/HS switch + Industrial 1-stage
thermostat) → Diagram 7433975
- 2-speed in AUTO mode schematic diagram (42AM-AC + 2-speed proximity switch + Industrial 2-stage thermostat)
→ Diagram 7433972

9 - POWERING UP

When switching on for the first time:
- Remove the bridge on the terminal strip (see "Motor connection" diagram [7433969]).
- Ensure that the motor rotates in the right direction (see marking indicating the fan's normal direction of rotation).
- Measure the current consumed by the motor:
• If this is equal to or less than the current indicated on the unit's data plate, the installation is in good working order.
• If the operating current consumed is greater than that indicated on the data plate, stop the motor immediately and check the
installation and the connections. If the motor appears to be the source of the fault, contact the supplier.

10 - MAINTENANCE

Although no specific servicing is required for CARRIER DESTRATIFIERS and AIR HEATERS, the following operations should be
carried out once a year:
- Retighten all the electrical connections
- Retighten all the screws on the unit
- Clean the propeller with a slightly damp cloth
Clean the coil by blowing it with air
Clean the casing and the diffuser using a slightly damp cloth
- These actions must be carried out by qualified personnel, with the power switched off
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