Instructions before the Installation
Check parts
Check all parts for perfect condition. Damaged parts must not be installed!
Transport
Use suitable lifting gear for loading and offloading, and for transporting parts on site.
Opening bar
Use appropriate tools for lifting out and/or inserting covers to avoid damage
Cleaning
Clean the contact surfaces and - if present - check the seal for cleanliness and correct fit and the closing device for perfect condition and operability before inserting the covers. Clean and moisten the underside of the frame before installation.
Instructions during Installation
Frame Position
The frame must always be in full contact with the mortar bed and capable of bearing. If the substructure is not executed correctly, subsequent traffic load will cause loosening, premature wear, rattling, or even destruction of the cover.
Mortar
Prepare the mortar bed (min. MG III, DIN 1053), install the frame with full contact and align at the correct height. When installing thin-walled frames which are not torsion-free make sure the cover is fitted when installing the frame.
Anchor Screws
If necessary, install anchor bolts in the shaft (e.g. pressure tight covers).
Height Adjustment
When adjusting the height of the manhole cover > 20 mm, concrete support rings, levelling segments or plastic-modified, non-shrinking, fast-hardening grouting mortars are recommended. For subsequent height adjustments, a new, full-surface mortar bed must always be produced.
Dirt Catchers
Insert dirt catchers.
Cleaning
Clean the top of the frame before inserting the cover and clean the contact surface of the cover.
Insert Cover
Insert the cover and check for noise-free seating.
Secure the Cover
The screws for screwed covers are tightened as follows:
M16 with max. 100 Nm
M18/M20 with max. 120 Nm
Instructions after Installation (Operation/Maintenance)
Opening Bar/Key
Lift out and insert the cover only with a suitable opening bar/key.
Ventilation opening time
Wait for ventilation opening time after opening if necessary (approx. 15 min.). Danger from gases!
Seal
Replace seal if damaged.
Cleaning
The supporting surfaces must be cleaned before each closing.
Installation instructions for self-levelling manhole covers
Operating and maintenance instructions can be found in our download area
Information about our manhole covers