Bedienungsanleitung Bosch Compress 3000 - HP 200-1 E AI-F (Seite 13 von 40) (Englisch)

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Installation instructions

of the relief valve, and possibly the heater itself.

Replacing the relief valve will not correct the problem!

The suggested method of controlling thermal expansion

is to install an expansion tank in the cold water line

between the water heater and the check valve. The

expansion tank is designed with an air cushion built in

that compresses as the system pressure increases,

thereby relieving the over-pressure condition and

eliminating the repeated operation of the relief valve.

Other methods of controlling thermal expansion are

also available. Contact your installing contractor, water

supplier or plumbing inspector for additional information

regarding this subject.

3.5 Electric requirements

Power requirements

Check the markings on the rating plate of the water

heater to be certain the power supply corresponds to

the water heater requirements.

Electrical connections

A separate branch circuit with copper conductors, over-

current protective device and suitable disconnecting

means must be provided by a qualified electrician.

All wiring must conform to local codes or latest edition

of National Electrical Code ANSI/NFPA 70.

The water heater is completely wired to the junction box

at the top of the water heater. An opening for ½” or ¾”

electrical fitting is provided for field wiring connections.

The voltage requirements and wattage load for the

water heater are specified on the rating label on the

front of the water heater.

The branch circuit wiring should include either:

• Metallic conduit or metallic sheathed cable approved

for use as a grounding conductor and installed with

fittings approved for the purpose.

• Non metallic sheathed cable, metallic conduit or

metallic sheathed cable not approved for use as a

ground conductor shall include a separate conductor

for grounding. It should be attached to the ground

terminals of the water heater and the electrical distri-

bution box.

Fig. 10 Water heater junction box

This water heater must be connected to the building

electrical system on a dedicated branch circuit. A

25amp circuit breaker must be installed for overcurrent

protection.

This water heater must be connected to the building's

electrical supply with 10AWG copper wire or larger.

If higher wattage elements are installed, consult the

National Electrical Code (NFPA 70) to determine the

proper circuit breaker and minimum wire size.

Caution: Do not mis-wire electrical

connections. 240V AC must be applied

to L1 and L2 wires as shown in Fig. 10.

Failure to do so will VOID the warranty.

Connecting the water heater to 120V

AC may damage the compressor or

other electrical components.

Warning: Proper ground connection

is essential. The presence of water in

the piping and water heater does not

provide sufficient conduction for a

ground. Use of non-metallic piping,

dielectric unions, flexible connectors,

etc., can cause the water heater to be

electrically isolated, which may cause

fire or shock.

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