Grohe Chiara, Manual

Page: 6 / 56

3
GB
Application
Thermostatic mixers are designed for hot water supply via
pressurized 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 suitable.
Thermostats cannot be used in connection with low pressure
storage heaters.
All thermostats are adjusted at the plant to a flow pressure
of 3 bar on both sides.
Should temperature deviations exist due to special installation
conditions, the thermostat must be adjusted to the local
conditions (see Adjustment).
Specifications
Minimum flow pressure without
downstream resistors
0.5 bar
Minimum flow pressure with
downstream resistors
1 bar
Max. working pressure 10 bar
Recommended flow pressure 1 - 5 bar
Test pressure 16 bar
Flow rate at 3 bar flow pessure approx. 20 l/min
Max. water temperature at hot
water inlet
80 °C
Recommended max. stored
temperature (energy saving)
60 °C
Safety check 38 °C
Hot water temperature at supply connection
min. 2 °C higher than mixed water temperature
Cold water connection
right
Hot water connection left
Minimum flow rate = 5 l/min
For flow pressures over 5 bar it is recommended that a
pressure reducing valve be fitted in the supply line.
Installation
Flush pipesFlush piping system prior and after
installation of fitting thoroughly
(Consider EN 806) !
thoroughly!
Install S-unions and fit mixer, for required dimensions , see
fold-out page II, Fig. [1].
1. Install the S-unions and sleeve, preassembled with the
escutcheon.
2. Screw-mount the mixer and check connections for leakage .
3. Push the sleeve with escutcheon onto the union nut.
4. Screw the escutcheon flush against the wall.
Refer to the dimensional drawing on fold-out page I.
Reversed union (hot on right - cold on left).
Replace thermostatic cartridge (A), see replacement parts
fold-out page II, ref. No. 47 657 (1/2”).
Adjustment
For temperature-adjustment, see Figs. [2] and [3].
• Before the mixer is put into service, if the mixed water
temperature measured at the point of discharge varies from
the specified temperature set on the thermostat.
• After any maintenance operation on the thermostatic
cartridge.
1. Open the shutt-off valve and check the temperature of the
water with a thermometer, see Fig. [2].
2. Lever out cap (B), see Fig. [3].
3. Remove screw (C).
4. Pull off temperature control handle (D).
5. Turn adjusting nut (E) until the water temperature
reaches 38 °C.
6. Install temperature control handle (D) in such a way that the
button (G) face the front.
7. Reinstall screw (C).
8. Re-fit cap (B).
Temperature limitation
The safety stop limits the temperature range to 38 °C.
If a higher temperature is desired, the 38 °C limit can be
overridden by pressing the button (G).