Nanni Q2400 Series, Руководство пользователя

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70
S 07 MAINTENANCE
CAUTION!
Do not use caustic soda as this could damage the core.
Heat exchanger reassembly
1. Place new O-rings (1) at both ends of the tube stack.
Insert it in the exchanger body.
2. Put the 2 covers in place (2 and 3 ) using the 8 screws
(1).
3. Tighten the screws to the required torque.
Heat exchanger Installation
1. Install the heat exchanger and its support assembly
using the 3 bolts (1) with their 3 GROWER Washer.
2. Tighten the bolts.
Coolant hoses installation
• See chapter hoses & clamps replacement
Raw water hoses installation
• See chapter hoses & clamps replacement
Coolant circuit filling.
WARNING!
Do not start the engine without coolant. Use a mixture
of 50% clean, fresh, non calcareous water and 50% anti -
freeze to top up the exchanger. For the water-antifreeze
mixture, the proportion of antifreeze must be 50%. Tight -
en the heat exchanger cap securely. If the cap is loose or
not properly raised, water may drip and the engine may
overheat. Do not use antifreeze and scale inhibitor at the
same time. Never mix different types or brands of cool-
ants or antifreeze.
• See chapter coolant replacement.