Manual Mastervolt Solar ChargeMaster SCM20 PWM (page 9 of 16) (English)

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EN / SCM20 & SCM40 PWM User’s Manual 9

3 INSTALLATION

During installation commissioning and maintenance of the

Solar ChargeMaster, the Important Safety Instructions are

applicable at all times.

3.1 UNPACKING

The delivery includes the following items:

 Solar Chargemaster;

 This User’s manual

 Important Safety Instructions

After unpacking, check the contents for possible damage.

Do not use the product if it is damaged. If in doubt, contact

your supplier.

3.2 ENVIRONMENT

Obey the following stipulations during installation:

 The Solar Chargemaster is designed for indoor use

only.

 Ambient operating temperature: -20°C ... 50°C / -4°F …

122°F (power de-rating above 40°C / 104°F to

decrease the internal temperature).

 Humidity: 5-95%, non-condensing.

 The Solar ChargeMaster must be mounted to a vertical,

solid and heat-resistant surface, with the connecting

cables downwards.

 Do not expose the Solar Chargemaster to excessive

dust, aggressive environments, ammonia or salt.

 Make sure that the hot air that is developed during

operation can be discharged. The Solar Chargemaster

must be mounted in such a way that obstruction of the

airflow along the heatsink on the backside of the casing

will be prevented.

 No objects must be located within a distance of 20 cm /

8 inch around the Solar Chargemaster.

 Do not locate the Solar Chargemaster in the same

compartment as the batteries.

 Do not install the Solar Chargemaster straight above

the batteries because of possible corrosive sulphur

fumes.

 Although the Solar Chargemaster fully complies with all

applicable EMC limits, it may still cause harmful

interference to radio communication equipment. If such

interference appears, it is recommended to increase the

separation between the Solar Chargemaster and the

equipment, to relocate the receiving antenna or to

connect the equipment to a circuit different from that to

which the Solar Chargemaster is connected.

3.3 WIRING AND FUSES

WARNING

The wire and fuse sizes stated in this manual

are given as example only. Prescribed wire and

fuse sizes may be different due to local

applicable regulations and standards.

Keep in mind that high current will pass through the DC

wiring. Keep the cable length as short as possible, this will

keep the system efficiency as high as possible. The

recommended minimum cross sections of the wiring are:

Model Minimum DC Cable cross section

<2m / 6ft length 2 - 4m / 6 - 12ft

SCM20 PWM 6mm² / 8AWG 10mm² / 6AWG

SCM40 PWM 10mm² / 6AWG 16mm² / 4AWG

Use boot lace ferrules on the wire ends. These ferrules

must be crimped with a proper crimping tool.

Use the following wire colours for DC wiring:

Wire colour Meaning Connect to:

Red Positive + (POS)

Black Negative – (NEG)

Lay the positive and negative cables next to each other to

limit the electromagnetic field around the cables. The

negative battery cable should be connected directly to the

negative post of the battery bank or the ground side of a

current shunt. Do not use the chassis frame as the

negative conductor. Tighten securely. The positive battery

cable must be fused and connected to the positive post of

the battery bank.

The recommended DC fuses are:

Model Battery fuse Load fuse

SCM20 PWM 20A 20A

SCM40 PWM 40A 40A

See section 5.3 for ordering information

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Mastervolt Solar ChargeMaster SCM20 PWM Manual

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