Pola HP23A Proportional motor control with 3 set points

General Description

The Pola HP23, HP23A is a proportional motor thermostat to control temperature by positioning equipment with a motor open and motor closed operation. eg. ventilation windows, gas valves, dampers, etc.

It comes supplied with a thermistor temperature sensor measuring in the range: -50.0/115.0 Deg.C or -58.0/239.0 Deg.F.
Variable on/off timed relay output and adjustable proportional band can be set for optimal opening and closing of motors with different speeds.
An added feature is the automatic recording of maximum and minimum temperatures for later viewing.
3 set points are programmable and selectable via external contact. This is done by closing a pair of contacts at the rear with either a 100 Ohm resister, short circuit, or open cicuit.
This enables easy change-over between common temperature settings.
The 3 position relay outputs are protected by a 3 Amp fuse.

Technical Specification

Power supply 230V +/- 10%
Mains frequency 50Hz +/- 20%
Power consumption 4W
2 x fused SPST Output Relays:
Resistive contact rating 3 Amp 230V - AC1
Inductive contact rating 11 Amp 230V - AC3
Measuring range -50.0/115.0 Deg.C
Measuring precision (Ambient 25 Deg.C) 0.1 Deg.C typical
Operating temperature -10/70 Deg.C
Overall dimension 96 x 96 x 63 mm
Overall dimension (IP54 version) 98 x 125 x 75 mm