Danfoss Solenoid Valve Installation Guide

Refrigerants Supported

The EVR 2 - EVR 22 solenoid valves are compatible with the following refrigerants: R22/R407C, R404A/R507, R410A, R134a, R407A, R23, R32, R290, R600, R600a. For other refrigerants, please contact Danfoss.

Note: Only EVR 2 - EVR 20 with solder connections and without manual stem are suitable for R32, R290, R600, and R600a. For these refrigerants, always use coils with protection degree IP65 or IP67. An external current fuse (rated current of fuse should be around two times of coil rated current, fuse type: medium time lag) shall always be installed ahead of coils to prevent sparks, arcs, over heat, or short circuit (except ATEX coils).

Valve Types and Construction

The document illustrates different valve configurations including NC flare, NC solder, NC flange, and NO solder types. It also shows a note regarding tube construction for flange types.

Diagram Description: Visual representations of EVR (NC flare), EVR (NC solder), EVR (NC flange), and EVR (NO solder) valve types are provided, highlighting their connection methods.

Mounting Directions

The guide specifies mounting directions for the solenoid valves, indicating that installation is permissible at -90°, 0°, and 90° orientations.

Coil and O-ring Installation

A: Ensure the O-ring is correctly positioned before assembly. B: A sticker indicates that certain instructions apply only to UL products.

Warning: Never switch on power to the coil when it is detached from the valve. Doing so can damage the coil and pose a risk of injury or burns.

Electrical Connections

The document details electrical connection information for the solenoid valves.

• Max. coil temperature: 9 W AC (EVR 2) tmax.= 40 °C, 10/12 W AC tmax.= 80 °C, 20 W DC tmax.= 50 °C, 10 W AC tmax.= 55 °C.
• Media temperature: Min. medium temperature tmin. = -40 °C, Max. medium temperature tmax. = 105 °C.

Pressure Ratings

Pressure specifications for different EVR models are provided:

Soldering and Flare Mounting

Instructions for soldering and flare mounting are included, with temperature limits specified for soldering (max. 100 °C) and a note about high temperatures for soldering (max. 700 °C).

Mounting / Dismounting Coil

The guide provides instructions and torque specifications for mounting and dismounting the coil. It emphasizes using cross-tightening.

Placement of Valve Seat

Instructions are given for the placement of the valve seat, including a note for EVR 4 – EVR 8 regarding dismounting the gasket and supporting ring by pressing and twisting.

Valve Assembly Diagrams

Detailed diagrams illustrate the assembly of various EVR valve types, including EVR 2 - EVR 3 (NC), EVR 4 - EVR 8 (NC), EVR 10 - EVR 22 (NC), EVR 4 - EVR 8 (NO), and EVR 10 - EVR 20 (NO). Some diagrams indicate that stickers apply only to UL products.