General Description; 3-Way Reversing Valve - Dimplex DWV 25 Instructions D'installation Et D'utilisation

DWV 25 - EMA DWV
2

General description

2.1 3-way reversing valve

2.1.1 Applications
The 3-way reversing valves (1", 1¼", 1½" or 2" with Rp connec-
tion according to ISO 7/1) and the "L-hole" are suitable for:
 switching the heating return in passive cooling operation
switching from heating to cooling in the flow or return in

combination with the combo tank
 other valve applications
2.1.2 General installation instructions
Note:
 Installation of the fitting in the pipework must be carried out
without mechanical stress.
 The fitting must not be used as a fixed point; it is supported
by the pipework.
 The fitting and the pipework must be free from dirt, welding
beads etc.
Fig. 2.1: Installation recommendation for avoiding excessive flow noise in HVAC systems.
 The installation of dirt traps (available as a special
accessory) is recommended in order to prevent water
contamination caused by rust particles, welding beads etc.
 All reversing valves must only be used in closed circuits. An
excessive oxygen mixture in open circuits can destroy the
valves.
 To ensure that no disturbing flow noise can be heard in quiet
rooms, the pressure differential over the reversing valve
must not exceed 50 % of the specified values.
ATTENTION!
Please note that the heat pump manager (HPM) has a maximum of two
mixer outputs.
Switching is carried out by an EMA DWV electromotive actuator,
which is activated by the heat pump manager.
 The pipework must be without pressure, the media must be
cooled down and the system must be emptied before the
fitting is removed.
The connections of the 3-way reversing valve are fitted with

a Rp internal thread. Screw threads are to be sealed using
materials suitable for this purpose.
 The 3-way reversing valve can be installed in different
positions. If the reversing valve is activated by an actuator,
upside down installation is not recommended (risk of
condensate entry, dripping water etc. along the valve
spindle)!
 The reversing valves are not suitable for use in potentially
explosive atmospheres.
 The individual materials used are approved for use in
connection with domestic water. The reversing valves as
complete units are not approved for domestic water
applications.
 When glycol-water mixtures are used, it is recommended
that a maximum concentration of 50 % glycol should not be
exceeded.
GDD-DWV · FD 9612
English
EN-3