2
GB
Application
Thermostat mixers are designed for hot water supplies from
pressurized storage heaters and offer the highest temperature
accuray when used in this way. Given sufficient output (min. 18 kW
or 250 kcal per min), electricor gas- fired instantaneous heaters are
also suitable.
Thermostats cannot be used in conjunction with unpressurized
storage heaters (displacement water heaters).
All thermostats mixers are adjusted at the factory with a flow
pressure of 3 bar on both sides.
If temperature deviations should occur on account of special
installation conditions, the thermostat should be adjusted to local
conditions (see Adjustment).
Technical data
Minimum flow pressure without downstream resistances 0.5 bar
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 pessure
34 334 / 34 336 approx. 20 l/min.
34 624 / 34 646 approx. 27 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
2 °C higher than mixed water temperature
Hot water connection left
Cold water connection right
Minimum rate of flow = 5 l/min
At flow pressures above 5 bar, we recommend installing a pressure
reducer in the supply pipe.
Installation
Flush pipe lines thoroughly
Install S-unions ans screw-mount themixer, see fig. [1].
In this connection, refer to the dimensional drawings on fold out
page I. The hot water supply must be connected onthe left, the cold
water supply on the right, as viewed from the operating position.
The projection can be increased by 20mm with an extension, see
fold-out page I (ref. No. 07 130).
Check connections for leaks.
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 thermoelement.
Open the shut-off valve and check the temperature of the water with
a thermometer, see fig. [2].
With the safety stop depressed, turn thermostat knob (E) until the
water temperature reaches 38 °C.
- Hold thermostat knob (E) in this position and unscrew and
remove screw (G).
- Pull off thermostat knob (E) and reinstall in such a way that the
38 °C mark on the knob coincides with the mark (W) on the mixer
body.
- Hold thermostat knob (E) and reinstall screw (G), see fig. [3].
Reversed union (hot on right - cold on left). Replace thermo-
element (Z), see replacement parts fold-out page I,
ref. No.: 47 282 (1/2”).
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 depressing the safety stop.
Temperature limit stoper for 45 °C for additional assembly
available under ref. No. 05 657, see fold-out page I.
Prevention of frost damage
When the domestic water system is drained, thermostat mixers
must be draind separately, since non-return valves are installed in
the hot and cold water connections. For this purpose, the mixer
must be removed from the wall.
Check function of automatic changeover (R) of bath mixer
34 334 and 34 336, see also fig. [4].
The water supply is turned on by lifting the lever.
The water will always emerge from the bath outlet first of all. Pulling
the changeover selector (R) closes the water passage to the bath
and the water is diverted to the shower outlet.
When the mixer is turned off,the diverter is automatically reset to its
starting condition, with the result that the water always flows out of
the bath tap when the mixer is turned on again.
In addition, the diverter assembly can be secured manually
(advantageous at pressures below 0,5 bar or at low rates of
discharge). In this case, pull the diverter knob of the diverter
assembly (R) and turn it anti-clockwise, see also fig. [5].
Maintenance
For maintenance, see fold-out page I and fig. [6] and [7].
Shut off hot and cold water supplies.
I. Non-return valve
1. With a 30mm open-ended spanner, unscrew and remove mixer
from unions.
2. Remove dirt strainer (U).
3. With a 12mm hexagon socket spanner, remove union nipple (S)
by turning clockwise (left-hand thread).
4. Remove non-return valve (V).
Reassemble in the reverse order.
II. Thermoelement
1. Unscrew and remove (G) and pull off thermostat knob (E).
2. Unscrew and remove adjusting nut (B).
3. Pull off stop ring (A).
4. With a 24mm open-ended spanner, unscrew and remove
thermoelement (Z).
Reassemble in the reverse order. In doing so, take care to ensure
that the stop ring (A) is installed in its original position [groove (P)
offset by 45°], see fig. [6].
Readjustment is necessary after every maintenance operation on
the thermoelement (see Adjustment).
III. Ceramic headpart
1. Remove shut-off knob (F).
2. Remove screw (D) and snap insert (H).
3. With a 17 mm open-ended spanner, unscrew and remove
ceramic headpart (Y).
Reassemble in the reverse order.
IV.Diverter assembly, see fig. [7].
1. Unscrew and remove cap (N).
2. With an open-ended 7mm spanner, unscrew and remove nut (O)
and remove diverter knob (I).
3. With an open-ended 13mm spanner, remove head nut (J) and
remove circlip (T).
4. Pull off lock washer (K) from diverter spindle (L).
5. With a 12mm socket spanner, remove outlet nipple (M).
Reassemble in the reverse order.
V. Unscrew and clean aerator (13 927), see fold-out page I.
Inspect and clean all parts, replace if necessary and grease with
special valve grease (ref. No. 18 012).
Replacement parts, see fold-out page I ( * = special accessories).
Use only genuine Grohe replacement parts.
Care
For directions on the care of this thermostat mixer, please refer to
the accompanying Care Instructions.
I951972.book : i95197gb.fm Seite 2 Mittwoch, September 22, 1999 1:47 PM
