Danfoss Pressure Switch
Installation Guide
Type KPI 34, KPI 35, KPI 36 and KPI 38
Product Specifications
The pressure switch is shown with dimensions: height 61 mm, width 84 mm, and depth 44 mm. It features a G1/4 A pressure connection. Diagrams illustrate mounting bracket options and the process of connecting the switch using wrenches.
Temperature Limits:
- t1 min: -40 °C
- t1 max: 65 °C
- t2 min: -40 °C
- t2 max: 100 °C
Maximum Pressure Ratings:
- KPI 34: 18 bar
- KPI 35: 18 bar
- KPI 36: 18 bar
- KPI 38: 30 bar
Range and Differential Settings:
| Type | Range | Diff. |
|---|---|---|
| KPI 34 | -0.2 - 3 bar | 0.5 - 1.25 bar |
| KPI 35 | -0.2 - 8 bar | 0.4 - 2 bar |
| KPI 36 | 4 - 12 bar | 0.5 - 1.6 bar |
| KPI 38 | 8 - 28 bar | 1.8 - 6 bar |
Please note: scale in KP units is indicative only. For accurate setting or when using according to FM approval use additional pressure gauge to set the unit.
Installation and Wiring
CAUTION: Disconnect power supply before wiring connections are made or service to avoid possible electrical shock or damage to equipment. Do never touch live parts with your fingers or with any tool.
A system diagram shows the pressure switch integrated with temperature limits. Internal views reveal terminal connections labeled 1, 2, 3, 4, and the switch mechanism. Diagrams also depict the switch's operational states (Start, Stop, Diff) in relation to pressure changes.
Electrical Ratings:
| Contact Type | Voltage | FL Load (AC) | LR Load (AC) | Resist. Duty (AC) | Pilot Duty (DC) |
|---|---|---|---|---|---|
| Standard contact | 240 V | 6 A | 36 A | 8 A | 3 A |
| 120 V | 8 A | 48 A | 10 A | ||
| 240 V | 12 W | ||||
| Direct current | 12 W, 220 V |
[UL Listed] Listed refrigeration controller 61B5
Use copper wire only. Tightening torque 20 lb. in.
Please note: No maintenance is required for the switches after final installation.
