0020244998_04 ecoTEC plus Installation and maintenance instructions 23
7.10 Connecting the flexible hose to the
expansion relief valve on the shift-load
cylinder
Danger!
Risk of scalding!
Heating water that leaks from the drain of
the expansion relief valve may cause severe
burns.
▶ Install the expansion relief valve drain to a
professional standard.
▶ Use the flexible hose that is included in
the scope of delivery.
1. Connect the flexible hose (1) to the expansion relief
valve (2).
2. Route the end of the flexible hose with a downward
gradient via an open connection to a tundish.
3. Make sure that the line end is visible.
7.11 Flue installation
7.11.1 Installing and connecting the air/flue pipe
1. You can find out which air/flue pipes may be used by
consulting the enclosed set-up instructions for the
air/flue system.
2. Observe the information on positioning the air/flue ter-
minal.
Condition: Installation in damp rooms
▶ You must connect the product to a room-sealed air/flue
system. The combustion air must not be taken from the
installation site.
Caution.
Risk of poisoning due to escaping flue
gas.
Mineral-oil-based greases can damage the
seals.
▶ Instead of grease, use only water or com-
mercially available soft soap to aid install-
ation.
3. Install the air/flue pipe using the set-up instructions.
7.11.2 Replacing the connector for the air/flue pipe
as required
1. Replace the connector for the air/flue pipe as required.
The product-specific standard equipment is listed under
Technical data.
2. Remove the connector for the air/flue pipe. (→ Page 23)
3. If required, install the connector for the air/flue pipe,
80/125 mm diameter. (→ Page 23)
7.11.2.1 Removing the connector for the air/flue pipe
1. Insert a screwdriver into the slot between the test
points.
2. Press the screwdriver carefully down (1.).
3. Turn the connector anti-clockwise (2.) as far as it will go
and then remove it by pulling it upwards (3.).
7.11.2.2 Installing the connector for the air/flue pipe,
80/125 mm diameter
1. Remove the connector for the air/flue pipe.
2. Insert the alternative connector. In doing so, pay atten-
tion to the latching lugs.
3. Turn the connector clockwise until it clicks into position.
7.12 Electrical installation
Only qualified electricians may carry out the electrical install-
ation.
Danger!
Risk of death from electric shock!
Power supply terminals L and N remain live
even if the on/off button is switched off:
▶ Disconnect the product from the power
supply by switching off all power supplies
at all poles (electrical partition with a con-
tact gap of at least 3 mm, e.g. fuse or cir-
cuit breaker).
▶ Secure against being switched back on
again.
▶ Wait for at least 3 minutes until the capa-
citors have discharged.
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