Manual Alde Compact 3020 HE - rev 1442 (page 14 of 18) (English)

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• Checking and changing glycol mixture. Regularly check the heating system’s uid level in the expansion tank.

The level should be about 1 cm above the minimum mark, with the heating system cold. The heating system should

be lled with a uid mixture made up from water and ethylene glycol. For best results, use high-quality ready-mixed

ethylene glycol (with inhibitors) intended for use in aluminium heating systems. The proportions when using concen-

trated ethylene glycol are 60% distilled water or water free from salts and 40% ethylene glycol. If the heating system

is exposed to temperatures lower than -25°C, a higher ethylene glycol content must be used, but not more than 50%.

Glycol mixture must be changed every other year as properties such as corrosion protection will deteriorate. If

Alde Premium Antifreeze is used, the change interval can be extended to ve years under normal operating condi-

tions. If the uid level is too low, the ethylene glycol content must be checked before topping up. This is to prevent

excessive concentration of ethylene glycol in the mixture. When topping up, use the same quality of ethylene glycol

mixture already in the system, alternatively use Alde Premium Antifreeze, which is compatible with most ethylene

glycol brands on the market. NB! Any vessels used for handling or mixing the liquid must be spotlessly clean,

and the pipes in the heating system must be free of contamination. This is to prevent the growth of bacteria

and corrosion in the system. The boiler must not be started if there is no ethylene glycol uid in the system.

• Filling glycol. The system is lled through the expansion tank, Either manually or using the Alde lling pump

(1900811), which both tops up and bleeds the system. For manual lling, unfasten the circulation pump nut (R)

and then lift the pump *(S) out of the tank. Slowly pour the ethylene glycol mixture into the tank.

Bleed the system. Top up with more uid if the level has fallen after bleeding. Bleed a newly lled heating system

regularly during the rst days it is in operation.

• Checking LPG system The LPG system should be checked regularly by a specialist, who will ensure that there

are no leaks from connections or hoses. LPG hoses should be changed as indicated on the date stamp, as they

tend to dry out and crack and are liable to leak as a result. For increased safety, we recommend tting an Alde leak

detector, type 4071, as close as possible to the reducing regulator.

• Emptying the water heater. The boiler is tted with a built-in hot water heater which can hold approximately 8.5

litres of freshwater. The hot water heater can produce around 12 litres of 40°C water per half-hour (at a cold water

temperature of 10°C). If the electric elements are used instead of gas for heating the water heater, the capacity is

slightly reduced. The water in the water heater must be drained at least once a month in order to create a new

air cushion in the heater. The air cushion is used to absorb pressure surges in the heater. For emptying specially-

adapted boilers, as well as the vehicle’s general freshwater system, please refer to the manufacturer’s instructions.

NB! The hot water heater should always be drained completely when there is a risk of frost and when the

vehicle is not in use. The warranty does not cover frost damage.

NB! Note that the water in the water heater can be hot.

Draining the heater using the combined safety/drain valve: (see page 15)

• Switch off the freshwater pump.

• Open all water taps.

• Then open the safety/drain valve by raising the yellow lever (M) to a vertical position, or by turning the knob (K)

180°. The heater will now drain directly below the vehicle through the safety/drain valve hose. Check that all the

water is emptied (about 7-10 litres). Leave the valve in the open position until the next time the heater is used.

NB! Check that the automatic non-return valve (N) is open and is allowing air to enter the heater when it is be-

ing drained, and that the hose is not blocked.

• Bleeding the system. Depending on how the pipes have been tted, air pockets may form when the system is

lled with ethylene glycol uid. If the pipes only warm up a metre or so from the boiler, even though the circulation

pump is operating, it is a symptom of air trapped in the system. In a newly lled system, small air bubbles can form

in the expansion tank, resulting in a gurgling sound. Switch off the circulation pump for a few seconds to allow the

bubbles to disappear.

Bleed as follows: If a bleed screw is tted to the outgoing pipe of the boiler, open this screw and leave it open

until uid starts coming out. If the boiler is equipped with an automatic air vent, bleeding the boiler will take place

automatically. Start the LPG boiler. The circulation pump should be switched off. Open the remaining bleed screws

in the system (please refer to the instruction manual of the vehicle for their locations). Leave the bleed screws open

until ethylene glycol uid starts coming out of them, and then close them. Start the circulation pump and let it run

for a while. See if the pipes and radiators are heating up around the vehicle. If this does not help, you can try the

following method:

Single-axle caravan: Switch off the circulation pump. Tilt the caravan forwards. Leave it in this position for a few

minutes to allow the air to travel upwards in the system. Open the bleed screw located at the highest point. Leave

it open until ethylene glycol uid comes out. Proceed in the same manner but with the caravan tilted backwards.

Then position the caravan horizontally and start the circulation pump. See if the pipes and radiators are heating up

around the vehicle.

Motor caravan or twin-axle caravan. On these, the easiest way to bleed the system is to park the vehicle on slo-

ping ground or to raise one end of the vehicle using a jack. Bleed the system as described above.

12. CARE AND MAINTENANCE

Functions marked with a (*) are accessories, which are not installed on all vehicles, refer to the vehicle

manufacturer's instructions.

My heating at night seems to switch on and of within half a minute or so. Should it be that regular.
Regards D. Davis Submitted on 4-5-2022 at 21:03
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Alde Compact 3020 HE - rev 1442 User Manual - German - 18 pages

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Alde Compact 3020 HE - rev 1442 User Manual - French - 18 pages

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Alde Compact 3020 HE - rev 1442 Manual

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