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What is the EvoFlat system solution?
3.5.2 Domestic hot water control valve – IHPT
Intelligent control with
thermostatic override
The IHPT controller controls the domestic
hot water (DHW) by taking both flow
volume and temperature into account.
During tapping the valve opens and the
thermostat start to control the DHW
temperature. The control is independent
of varying tapping flows, supply
temperature and differential pressure.
When tapping ends, the valve closes
immediately. This protects the heat
exchanger (HEX) from scaling.
Integrated energy efficient
standby function (idle mode)
In periods with no tapping of water, the
standby function automatically adjusts
itself below the selected DHW temperature.
Thereby the HEX is always ready
to produce DHW. The idle mode is built
into the controller and requires no readjustments.
Thereby the idle temperature
will always be set correctly, and the
energy usage is kept to a minimum.
Furthermore low return temperature is
ensured, also during standstill.
Function
2
2 1 4 3
Suitable for low supply
temperature operation
The IHPT controller ensures perfect regulation
of DHW at both low and higher
supply temperatures. It also guarantees
maximum comfort at minimum energy
consumption. Thus IHPT is the perfect
choice in low supply temperature
systems.
Environmental-friendly comfort
– no waste of water
IHPT ensures that the HEX is always
ready to produce DHW. The house
owner or user feels the comfort by the
instant availability of hot water in the
tap. This means high comfort as well as
minimum waste of water.
Integrated differential
pressure controller
The integrated differential pressure
controller inside the IHPT optimizes the
control conditions for the thermostatic
part of the valve.
23
IHPT
Flow-compensated temp. controller
with integrated differential pressure
controller (NO).
Main data
• Pressure stage:
PN16 primary side
PN16 secondary side
• Dimension:
DN 15: Kvs = 3,0 m3/h
• Max flow temperature:
120°C
• Temperature range:
45°C - 65°C
The IHPT control valve consist of following:
1) The proportional valve / pilot valve
2) Thermostatic control valve.
3) Differential pressure controller.
4) Thermostat with sensor.
When you open the DHW tap a pressure drop
arise at the proportional valve (1) which force the
thermostatic valve (2) towards open position. The
thermostat (4) adjust DHW temperature according
to the set value. The differential pressure controller
(3) control a constant and low differential pressure
across the thermostatic control valve (2). By closing
the DHW tap the proportional valve close the
primary flow immediately.
What is the EvoFlat system solution