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Grohe 34538 PRECISION FEEL Manual

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Installation, see page 2 and 3.
Flush piping system prior and after installation of fitting
thoroughly (Consider EN 806)!
If there is a pressure difference between the hot and cold
water supply install attached flow limiters (A) in the water
connection elbows, see page 2, Fig. 1 and table below.
Screw-mount the mixer and test the connections for water
tightness.
Adjusting, see page 4.
Open the shut-off valve and turn temperature lever counter-
clockwise to maximum hot water temperature. Check the
temperature of the water with a thermometer. If temperatur is
not 43°C an adjustment is necessary. Turn regulating nut until
the water temperature has reached 43 °C.
Operation, see page 4.
Prevention of frost damage
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
mixer must be removed from the wall.
Maintenance, see page 7.
Shut off hot and cold water supplies.
I. Control unit
Remove control unit, see page 7, Figs. [1] - [4].
Inspect and clean all parts, replace if necessary and lubricate
with special grease.
Reinstall control unit, see Figs. [5] - [9].
• Reinstall O-ring and screw in control unit, see Fig. [5].
• Push on adapter and shut-off lever.
• Turn the lever clockwise to the close position
• Pull off lever and adapter again, see Fig. [6].
• Reinstall wax element, slider and spring from behind, see
Fig. [7].
• Unscrew seat 1/8 to 1/6 turn (45° to 60°), see Fig. [8].
• Reinstall valve, see Fig. [9].
II. Non-return valve, see pages 2 and 7.
• Remove valve from the supplies, see page 7, Fig. [2].
• Unscrew elbow and remove threaded ring with flow limiter
(A) if installed, see page 2, Fig. [1].
• Take out and clean or replace non-return valve, see page 7,
Fig. [10].
Install in reverse order.
Readjustment is necessary after every maintenance
(see Adjusting).
Replacement parts, see page 8
(* = special accessories).
Care
For directions on the care of this fitting, please refer to the
accompanying Care Instructions.
Cold Water
Inlet Warm Water
Inlet Connection
Cold Warm
0.1 - 1 bar 0.1 - 1 bar without without
1 - 5 bar 1 - 5 bar 7 l (green) 5 l (yellow)
1.5 - 10 bar 0.1 - 0.5 bar 7 l (green) without
> 0.5 bar 7 l (green) 5 l (yellow)
6
Trouble Shooting
Problem Cause Remedy
Thermostatic valve opens
through hot Hot and cold water supplies have been
connected in reverse Rotate the thermostatic mixing valve
Range of temperature
adjustment restricted High pressure difference between hot and
cold water supply Install flow limiter see chapter Exposed
Installation
Shower insufficiently cold or
hot Adjustment incorrectly set
Hot water supply temperature too low
Refer to the instructions in chapter
Adjustment
Check hot water source temperature setting
No flow of hot or cold water Either the hot or cold side is not fully
pressurized
Debris caught inside the inlet of the control
unit
Replace non-return valve, refer to chapter
Maintenance
Remove mixing valve and flush out or
remove any debris lodged inside the hot or
cold inlets or filters
Hot water emerges to cold
water supply or vice versa Non return valves are damaged in cause of
lime Replace non-return valve, refer to chapter
Maintenance
5


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