FITTED EQUIPMENT
106
ALDE HEATING OPERATING INSTRUCTIONS
When the hot water cylinder is in continuous
use, it should be drained and refilled once a
month. This recreates the air cushion in the hot
water cylinder that absorbs pressure surges.
Tip! If continuously using the hot water
cylinder in a hard water area, fit an inline scale
inhibitor to minimise the effects of limescale
Target hot water temperature is greater
than 50 °C in normal operation, to prevent
the growth of Legionella. Over 50 °C , the
hot water will be heated to the maximum
achievable temperature at the time. This
allows the hot water to achieve disinfection
temperatures, and increases warm water
performance.
If scalding hot water temperatures are a
concern – such as with the young, elderly or
infirm – thermostatic mixing valves (TMVs)
can be fitted, and may be required by local
regulations.
! WARNING: Always drain down and
completely empty the hot water cylinder
when there is risk of frost, unless the vehicle
is explicitly stated to be self-winterising by
the vehicle manufacturer.
Failure to drain the hot water cylinder when
there is a risk of frost may result in frost
damage, and is not covered under warranty.
Draining Freshwater
1. Switch off the water pump.
2. Open all water taps, showers, etc.
3. Open the safety/drain valve by lifting the
yellow tab (Fig 1 [M]), or by turning the blue
knob (Fig 1 [K]) 90°.
4. The system will drain directly below the
vehicle through the clear plastic hose on the
safety/drain valve. Check that all water has
emptied out (7–10 litres). Leave the valve in the
open position until the next time the hot water
cylinder is used.
NB: Check that the red breather valve (Fig
1[N]) is allowing air to enter the hot water
cylinder, when it is being drained, and that the
clear plastic hose is not obstructed.
Open the manual safety/drain valve
Opening the safety/drain valve
Figure 1
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