Grohe GROHTHERM MICRO 34 487 Installation Instructions Manual Download Page 5

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Safety notes

Caution: Risk of scalding

Before and during use make sure that the thermostat
is functioning correctly. Children and adults with

reduced sensory capabilities should not use the product
unsupervised.

Application

Thermostat mixers are designed for hot water supply via
pressurised storage heater and utilised in this way provide the
best temperature accuracy. With sufficient power (from 18 kW
or 250 kcal/min) electric or gas instantaneous heaters are also
suitable.
Safe limitation of the max. outlet temperature via preset
thermostats on every standard wash basin mixer

(thermal

scalding protection)

Thermostat mixers cannot be used in conjunction with low-
pressure storage heaters (displacement water heaters).
All thermostats are adjusted in the plant at a flow pressure on
both sides of 3 bar.
If temperature deviations should occur on account of special
installation conditions, the thermostat must be adapted to local
conditions (see Adjustment).

Specifications

• Minimum flow pressure with downstream resistances: 1 bar
• Max. operating pressure:

10 bar

• Recommended flow pressure:

1 - 5 bar

• Test pressure:

16 bar

• Flow rate at 3 bar flow pressure:

approx. 20 l/min

• Max. water temperature at hot water inlet:

70 °C

• Thermal disinfection possible
• Pre-adjustment:

39 °C

• Max. mixed water temperature:

43 °C ±2 °C

• Minimum flow rate:

= 5 l/min

Measured at a hot water supply temperature of at

least 60 °C with constant pressure cold/warm.
A pressure reducing valve must be fitted in the supply line if
static pressures exceed 5 bar to satisfy noise level ratings.

Installation

Refer to the dimensional drawing on fold-out page I.

Flush pipes thoroughly before and after installation

(observe EN 806)

Screw thermostat on hot water service valve,

see fold-out

page II, Fig. [1].

It is recommended that for installation and to secure the non-
return valve the connection set [ref. No. 47 533, see fold-out
page I] or the hose [ref. No. 45 704] are used.

It is recommended that a flexible pressure hose is connected
as installation aid for fittings with copper pipes [ref. No. 45 120,
see fold-out page I].

Connection to pillar tap,

see Figs. [2], [3a] and [4a].

Connection to mixer fitting,

see Figs. [2], [3b] and [4b].

Open the hot and cold water supply and check that
connections are watertight.

Adjustment

Before the mixer is put into service and after any maintenance
operation on the thermostatic compact cartridge the
thermostat must be adjusted.
For

pillar taps

the mixed water temperature is adjusted at the

thermostatic compact cartridge.
For

mixer fittings

the max. hot water temperature is adjusted

at the thermostatic compact cartridge.

Temperature setting,

see fold-out page II, Fig. [5].

Prevention of frost damage

When the domestic water system is drained, thermostat
mixers must be drained separately, since non-return valves
are installed in the hot and cold water connections. For this
purpose, the thermostat must be removed from the unions.

Thermal disinfection

With the supplied key a thermal disinfection can be carried out
without changing the setted temperature. A subsequent
adjustment is not necessary.

Thermal disinfection,

see fold-out page II, Fig. [6].

- Start by turning the key to the left.

The flushing time during the thermal disinfection depends on
the water temperature. National standards must be
observed.

- Terminating by turning the key to the right until it stops.

Maintenance

Inspect and clean all components and replace if necessary.

Shut off cold and hot water supply.

I. Non-return valves,

see fold-out page II, Fig. [7].