Swegon CRMc Series Installation

CRMc
Installation – Commissioning – Maintenance

Accessories

Actuator:
Sauter ASM115SF901, ASM124SK001, 24 V AC, standard
actuators depending on size.
Other actuators must be ordered, see actuator table page 3.
Wiring Diagrams are displayed on pages 2 to 3.
Knob:
CRTT-1 for manual control.
Quick connection:
FSR. Clamp with quick-acting lock.

Installation

Damper is Inserted into the connecting duct and fixed in
position by pop rivets or by means of an FSR clamp. See
Figures 1 and 2.

Commissioning

Connect hoses from a manometer to the measurement
nipples. Turn and lock the damper blade at the desired
setting angle For particulars of motorised control, we
refer to the actuator supplier's instructions. K-factors are
shown on the product's identification label. The K-factor
can also be found in the table, page 4.

Maintenance

Clean the damper whenever needed by means of a
vacuum-cleaner or by wiping surfaces with a cloth.
Figure 1. Installation.
Figure 2.Straight duct length demands, see table below

Methodic Errors

Type of obstruction
upstream of the CRM
One 90° bend.
Two 90° bends in the same
plane.
Two 90° bends in aligment at
right angles to one another.
One 45° damper.
One T-piece.
m = methodic error B22, Building Research Council document
2
"Methods for the Measurement of Airflows in Ventilation
Installations"
20130522
.
Length of straight duct (L)
upstream of the CRM
For m = 5% For m =10%
2 2
3 x Ød 2 x Ød
4 x Ød 2 x Ød
4 x Ød 2 x Ød
6 x Ød 3 x Ød
4 x Ød 3 x Ød
1