Klima-Set Differential pressure switch for air
KS…A2-7

Technical description
Two separate pressure chambers with pressure-side connection to hose nipples.
Connection of ø 4 mm for each pressure chamber. Reference value (pressure difference) can be set directly.
Reference value can be read off externally through the transparent hood.
Precise function through special switching system in a frictionless bearing. Contact switchover is performed when the set reference value is exceeded or undershot. Complete mounting kit enclosed.

Application
The equipment is used in ventilation and air-conditioning systems, DDC. It is specially designed for monitoring air ducts, filters, drive units and blowers.

Approvals
EC type testing certificate as per:
• EC-Gas Appliances Regulation
Approvals in other important gasconsuming countries.

Functional description
Differential pressure switch in pressure and vacuum ranges. The differential pressure acts via the diaphragm against the force of the setting spring on the microswitch.
If the set reference value is exceeded or undershot, the circuit is switched on, off or over.
The differential pressure switch of the Klima-Set works without an auxiliary power.

DDC application
The switching contacts of the KlimaSet are made of gold-plated silver, for 24 V DC; 0.02 A.
When using the Klima-Set in conventional systems at 250 V AC, 4 A ohmic load, 2 A inductive load, cos ϕ 0.6, the gold-plated coating on the switching contacts burns off.
This makes a subsequent DDC application impossible.