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Safety notes
Protection against scalding
It is recommended that near points of discharge with
particular sensitivity to the outlet temperature
(hospitals, schools, nursing and retirement homes)
thermostatic devices should be installed which can limit the
water temperature to 43 °C. The product includes an
appropriate temperature end stop. It is generally
recommended that the temperature of shower-systems should
not exceed 38 °C in nurseries and specific areas of care
centres. Use Grohtherm Special thermostats with special
handle to facilitate thermal disinfection and appropriate safety
end stop. Applicable standards (e. g. EN 806-2) and technical
regulations for drinking water must be observed.
Application
Thermostat mixers are designed for hot water supply via
pressurised storage heaters and, utilised in this way, provide
the best temperature accuracy. With sufficient power output
(from 18 kW or 250 kcal/min), electric or gas instantaneous
heaters are also suitable.
Thermostats cannot be used in conjunction with
non-pressurised storage heaters (displacement water
heaters).
All thermostats are adjusted in the factory at a flow pressure
of 3 bar on both sides.
Should temperature deviations occur on account of special
installation conditions, the thermostat must be adapted to local
conditions (see Adjusting).
Specifications
Minimum flow pressure without
downstream resistances
Minimum flow pressure with
downstream resistances
Max. operating pressure
Recommended flow pressure
Test pressure
Flow rate at 3 bar flow pressure
Max. water temperature at hot water supply
Thermal disinfection possible
Recommended max. flow temperature (energy saving) 60 °C
Safety stop
Hot water temperature at supply connection min. 2 °C higher
than mixed water temperature
Cold water connection
Hot water connection
Minimum flow rate
If static pressure exceeds 5 bar, a pressure reducing valve
must be fitted.
Installation
Flush piping system prior and after installation of fitting
thoroughly (Consider EN 806)!
Wall installation
1. Install S-unions and attach the sleeve together with the
escutcheon, see fold-out page I, Fig. [1].
2. Screw-mount the mixer and test the connections for
watertightness.
3. Push the sleeve with escutcheon onto the union nut.
4. Screw the escutcheon flush against the wall.
34 502
5. Install rack, see Fig. [2].
The projection can be increased by 30mm with an extension,
see Replacement Parts, fold-out page II, Prod.no.: 46 238, not
for 34 502.
Reversed connection (hot on right - cold on left).
Replace thermostatic compact cartridge (A), see Replacement
parts, fold-out page II, Prod. no.: 47 175 (1/2").
Adjusting
Temperature adjustment, see Figs. [3] and [4].
1. Open the shut-off valve and check the temperature of the
water with a thermometer, see Fig. [3].
2. Lever out cap (B), see Fig. [4].
3. Remove screw (C).
4. Detach temperature control handle (D).
5. Turn regulating nut (E) until the water temperature has
reached 38 °C.
6. Install temperature control handle (D) so that button (F)
points towards the front, see Fig. [3].
7. Screw in screw (C), see Fig. [4].
8. Refit cap (B).
Temperature limitation
The safety stop limits the temperature range to 38 °C. The 38 °C
limit can be overridden by pressing the button (F).
Temperature end stop
If the temperature end stop is at 43 °C, insert accompanying
temperature limiter (D1) in temperature selection handle (D),
see Fig. [5]. Handle with preassembled temperature end stop,
0.5 bar
Prod. no.: 47 958 (see Replacement parts, fold-out page II).
1 bar
Shut-off handle (G) operation, see Fig. [6].
10 bar
Shut-off handle in central position
1 - 5 bar
Turn shut-off handle anti-clockwise = discharge from shower
16 bar
Turn shut-off handle clockwise
approx. 20 l/min
Prevention of frost damage
70 °C
When the domestic water system is drained, thermostats must
be drained separately, since non-return valves are installed in
the hot and cold water connections. For this purpose, the
38 °C
mixer must be removed from the wall.
Maintenance
right
Inspect and clean all parts, replace if necessary and lubricate
with special grease.
left
Shut off hot and cold water supplies.
= 5 l/min
I. Non-return valve (H), see fold-out page III Fig. [7].
• Remove connection nipple (K) by turning clockwise (left-
hand thread) using a 12mm allen key.
Install in reverse order.
II. Thermostatic compact cartridge (A), see fold-out
page III, Fig. [8].
Install in reverse order.
Observe the correct installation position of the
thermostatic compact cartridge (A), see details.
Readjustment is necessary after every maintenance
operation on the thermostatic compact cartridge
(see Adjusting).
= closed
= discharge from spout
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