temperature measurement could be easily
interfered by external conditions.
Avoid places with weak air circulation,
e.g.: behind furniture.
16.2.7. Output H connection
Output H is adapted to connect relay supplied
with voltage of 5…6V
(with coil resistance not lower than 60Ω)
and power up to 0.5W.
Heater and pump
When connecting the heater and the
pump, a relay of type 6VDC RM85-2021-35-
1006 must be connected, as shown in Fig. 17.10
Wire that connects the controller and relay must
not have resistance bigger than 1Ω.
The relay along with the stand is available
as an accessory.
Current received by a receiver may not
be higher than nominal current of the
relay load. Otherwise, it may be
damaged and in extreme case it may
cause damage to solar or heating
system.
Fig. 16.11 Connection of relay to H output.
Three-way switching valve
The output may be used for a three-way
switching valve that is controlled:
1. Unipolarly with return spring: such
valve connect to H output of the controller
through a relay, like in Fig. 16.11
2. Bipolarly, right-left rotations (3-wire
control): Neutral conductor is connected
directly to the valve, while wires that control
direction of rotations are connected via a
relay and its contacts to relevant terminals.
Status relations on H outlet and respective
direction of the valve switching are presented
in application schemes.
Change of rotation direction switching will
cause incorrect operation of the unit.
Fig. 16.12 Connection of three-way, bipolarly controlled
valve to H output
If the valve has grounding terminal, connect it
directly to the valve.
Connection of other valve types than
specified above may lead to undesired
operation and is not recommended.
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