ZIEHL-ABEGG MK090 Series Assembly Instructions Manual

Also see for ECblue Series: Quick start guide Assembly instructions

Contents

ZIEHL-ABEGG MK090 Series Assembly Instructions Manual Manual pdf 10 page image

4.4 MotorheatingA continuous power supply is required for safe operation down to the minimum permitted ambienttemperature (see technical data).If the motor is not switched on with an existing power supply (no setting signal, switch off by enable),the motorheating switches back off automatically at a controller inside temperature of -19 °C andheating up to -15 °C.Heating takes place via the motor winding whereby a current is induced which cannot cause rotation.4.5 Installation of axial fans4.5.1 Fans design A, D, K, S and W (without nozzles)For attachment to fixed motor flange use screws with property class 8.8 or A2-70 (stainless steel) toEN ISO 4014 and provide with suitable screw locking.Permissible tightening torques MAThread size M6 M8Property class 8.8, friction coefcient μges = 0.12 9.5 Nm 23 NmStainless steel A2-70, friction coefcient μges = 0.12 7 Nm 17 NmScrew penetration ≥ 1.5 x d ≥ 1.5 x dWhen using screws with different friction values or strength classes, different tightening torques maybe necessary.Information• Pay attention to a sufficient screw-in length in the motor flange.• An excess screw length of max. 3 mm is permissible.• Every screwing case is different. The tightening torque adapted to it must be determined by theappropriate screw tests.• In the case of a vertical motor axis, the respective lower condensation drain hole must be open.• Secure fan connection cable with cable fasteners or cable clips.A minimum head gap “A” of 2.5 mm in all installationpositions but especially in installation position “H” (horizon-tal motor shaft) is necessary. Distortion due to uneven sur-face may lead to fan failure due to brushing against the fanwheel.Attention!Avoid structural damage or stress with installation. Make sure the surface is flat and even.Assembly instructions ECblue MountingL-BAL-F055D-GB 1634 Index 002 Part.-No.10/51