MICRO-AIR Artic Air 24 Installationsanleitung PDF herunterladen (Seite 32)

Introduction

With all components mounted and the copper tubing run, it is now time to make the electrical

connections. Included in this manual is the wiring schematic for your particular system

configuration. Also read the section below on “Basic Operation of System Priority” to understand

that freezer takes priority over refrigerator, which takes priority over air conditioning. All wire

sizes are given in “American Wire Gage” (AWG). Longer runs (always use the combined length

of the positive and negative wire) will require heavier wire. Installers outside the US are

reminded that this is not the same as metric wire sizes which are given in mm. To retain the

reliability inherent in your Glacier Bay system it is important that all connections are done in

proper fashion using a high strand count 100% tinned marine-grade wire.

(This is a Prestart Checkout Item)

Wiring the Electrical Connections

When wiring the electrical connections it is important to ensure that all wires are fully inserted

into their proper terminal locations. Strands from frayed wires can create electrical shorts and

poor contacts. Tinned wire is less prone to corrosion and less likely to loosen up over time.

(This is a Prestart Checkout Item)

NOTE: The maximum size wire which can be accommodated by the terminal block is #4 AWG.

If your system requires the use of heavier gage wire, you will need to “step-down” to #4 just

before entering the control box. It may be convenient to install a second terminal block just

outside the condensing unit to provide a voltage test point and make it easier to service the unit

in the future.

Extending the Temperature Probe Wire

The temperature probes used to monitor the holding plate and box are identical and

interchangeable. The probes come with a 59" (150cm) length of wire attached. This can be

extended to any length using #18 AWG tinned wire. If the wire is extended, the connections

MUST be soldered and sealed with heat shrink tubing.

(This is a Prestart Checkout Item)

Engine-Drive Signal Input (ECM Controllers only)

The optional ECM controller provides an automatic holding plate “top-off” mode of operation

whenever extra power is available. This system does not operate from a change in voltage but,

rather, from a distinct and separate input. All systems which include the ECM controllers option

require that an additional wire be run to notify the system that the auxiliary engine has been

started and that additional power is available. This wire should be taken from a location which is

“HOT” with a positive DC current only when the engine (and/or generator) is running. The key

start switch is one obvious choice. Alternately, on some engines it may be possible to use the oil

pressure safety system, however, this must be of the “make on pressure rise” type. The current

load on this wire is very low with a draw of only a few milliamps.

On some vessels it may be desirable to also connect this wire to a toggle switch (for manual

activation) and/or to the generator or other secondary power source. When activating the

“engine-drive” mode from several different sources (such as both and engine and generator), be

sure to use a diode in each wire to prevent back-feeding the other input devices.

Maximum Current Draw for Individual Components

The wiring diagram and accompanying text information for your system (included in this manual)

provides recommended wire sizes and circuit breaker capacities for your system configuration.

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