Maintenance - Grohe Atrio Anleitung

Adjusting the economy stop
For flow rate adjustment, see fold-out page III figs. [5]
and [6].
• The flow rate is limited by a stop, adjusted by the
factory.
If a higher rate is desired, the stop can be over-
ridden by pressing the button (N1), see fig. [5].
If the stop is required to be adjusted, proceed as
follows:
1. Close shut-off valve.
2. Detach knob (K).
3. Unscrew screw (L) and pull off snap insert (M).
4. Detach flow control knob (N).
5. Remove splined adapter (O) and economy stop (P).
6. Fit economy stop (P) in the desired position, see
fig. [6] for possible adjustment range.
7. Fit splined adapter (O), see fig. [5].
8. Fit flow control knob (N), see detail (Q).
9. Install snap insert (M) with screw (L) and refit
knob (K).
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 mixer must
be removed from the wall.

Maintenance

Inspect and clean all parts, replace if necessary and
grease with special valve grease.
Shut off cold and hot water supplies.
I. Non-return valve, see fold-out page I and II.
1. Disassemble mixer in reverse order, see fold-out
page I, fig. [1] and [2] and text Installation.
2. Remove seal (R1) and dirt strainer (R2), see fold-out
page II.
3. With a 12mm hexagon socket spanner, remove
union nipple (S) by turning clockwise (left-hand
thread).
4. Remove non-return valve (T).
Reassemble in reverse order.
II. Thermostatic cartridge, see fold-out page III,
Abb. [7].
1. Pull off knob (D).
2. Unscrew screw (E) and pull off snap insert (F).
3. Pull off temperature control handle (G).
4. Remove clip (V1).
5. Pull off stop ring (V).
6. Remove adjusting nut (W) with overload unit (W1).
7. With a 22mm open-ended spanner, unscrew and
remove thermostatic cartridge (X).
Reassemble in reverse order.
The overload unit (W1) (left-hand thread) must be
screwed as far as possible in the adjusting nut (W).
Observe the correct installation position of the
stop ring (V).
Readjustment is necessary after every maintenance
operation on the thermostatic cartridge (see
Adjustment).
III. Ceramic headpart, see fig. [5].
1. Remove knob (K).
2. Unscrew screw (L) and pull off snap insert (M).
3. Remove shut-off knob (N).
4. Remove splined adapter (O) and economy stop (P).
5. Unscrew and remove ceramic headpart (Z) with
a 17mm open-ended spanner.
Reassemble in reverse order.
Replacement parts, see fold-out page II ( * = special
accessories).
Care
For directions on the care of this thermostat mixer,
please refer to the accompanying Care Instructions.
4