Specifications; Maintenance - Grohe Grohtherm 3000 34 679 Montageanleitung

GB
Application
Surface mounted thermostatic mixers are designed for hot water
supply via pressurized storage heater and utilized 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 in the plant at a flow pressure on both
sides of 3 bar.
If temperature deviations should exist due to special installation
conditions, then the thermostat is to be adjusted to the local
conditions (see Adjustment).

Specifications

Minimum flow pressure without
downstream resistances
Minimum flow pressure with
downstream resistances
Max. working pressure
Recommended flow pressure
Test pressure
Flow rate at 3 bar flow pressure
Max. water temperature at hot water inlet
Recommended max. stored temperature
(energy saving)
Safety check
Hot water temperature at supply connection min. 2 °C higher than
mixed water temperature
Hot water connection
Cold water connection
Minimum flow rate
At a flow pressure over 5 bar it is recommended that a pressure
reducing valve be fitted in the supply line.
Installation
Flush pipe lines thoroughly
Install S-unions and screw-mount the mixer, see fig. [1].
In this connection, refer to the dimensional drawing.
The hot water supply must be connected on the left and the cold
water supply on the right as viewed from the operating position.
1. Install the S-unions and sleeve, preassembled with the
escutcheon.
2. Screw-mount the mixer and test the unions for leaks.
3. Push the sleeve with escutcheon onto the union nut.
4. Screw the escutcheon flush against the wall.
The projection can be increased by 30mm with an extension,see
Replacement Parts, fold-out page II, ref. No. 46 238.
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
specifiede temperature set on the thermostat.
• After any maintenance operation on the thermoelement.
Open the shutt-off valve and check the temperature of the water
with a thermometer, see fig. [2].
With the safety stop depressed, turn thermostat knob (C) until the
water temperature reaches 38 °C.
- Lever out cap (M), see fold-out page II.
- Hold thermostat knob (C) in this position and unscrew and
remove screw (D), see fig. [3].
- Pull off thermostat knob (C) and reinstall in such a way that the
38 °C mark (◊) on the knob coincides with the mark (E) on the
mixer body.
- Hold thermostat knob (C) and reinstall screw (D), see fig. [3].
- Fit cap back on.
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 safet stop.
Adjusting the economy stop
For flow rate adjustmentment
• The flow rate is limited by a stop, adjusted by the factory.
If a higher rate is desired, the stop can be overridden by
depressing the economy button (F), see fig. [4].
If the stop is required to be adjusted, proceed as follows:
1. Close shut-off valve.
2. Lever out cap (G) and remove screw (H), see fig. [4].
3. Remove shut-off knob (I), splined adapter (J) and economy
stop (K), see fig. [5].
4. Reinstall economy stop (K) in the desired position. For
0.5 bar
adjustment range, see fig. [6].
5. Reinstall splined adapter (J) and shut-off knob (I) with economy
1 bar
button (F) facing the front.
10 bar
Reinstall screw (H) and refit cap (G), see fig. [7].
1 - 5 bar
16 bar Prevention of frost damage
approx. 22 l/min
When the domestic water system is drained, thermostat mixers
80 °C
must be draind separately, since non-return valves are installed in
the hot and cold water connections. For this purpose, the mixer
60 °C
must be removed from the wall.
38 °C

Maintenance

For maintenance, see fig. [1] and fold-out page II.
left
right
Shut off hot and cold water supplies.
= 5 l/min
I. Non-return valve
1. Disassemble mixer in reverse order, see fig. [1].
2. Remove dirt strainer (P).
3. With a 12mm hexagon socket spanner, remove union nipple (L)
by turning clockwise (left-hand thread).
4. Remove non-return valve (R).
II. Thermoelement
1. Lever out cap (M).
2. Unscrew and remove (D) and pull off thermostat knob (C).
3. Unscrew and remove adjusting nut (B).
4. Remove clip (N).
5. Pull off stop ring (A) and splined adapter (O).
6. With a 22mm open-ended spanner, unscrew and remove
thermoelement (S).
Readjustment is necessary after every maintenance operation on
the thermoelement (see Adjustment).
III.Ceramic headpart
1. Lever out cap (G) and remove screw (H).
2. Remove shut-off knob (I), splined adapter (J) and economy
stop (K).
3. With a 17mm open-ended spanner, unscrew and remove
ceramic headpart (T).
Inspect and clean all parts, replace if necessary and grease with
special valve grease (ref. No. 18 012).
Reassemble in the reverse order.
Use only genuine Grohe replacement parts.
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.
,
see figs. [4] to [7].
2