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950741.book : I95074US.FM Seite 1 Freitag, Februar 18, 2000 8:58 AM
Application
Thermostat mixers are designed for use with hot water
supplied from pressurized storage heaters and offer
the highest temperature accuracy when used in this
way. Given sufficient output (min. 18 kW or 250 kcal
per min), electric or gas-fired instantaneous heaters
are also suitable.
Thermostat mixers cannot be used in conjunction with
low-pressure storage heaters (displacement water
heaters).
All thermostat mixers are adjusted at the factory at a
flow pressure of 45 psi on both sides.
A shutoff device (A) must be installed after the mixed
water outlet of concealed thermostatic mixer (34 907),
see fig. [1].
This valve has no by-pass annulus and therefore
when used with diverter spout a TWIN ELL MUST
BE USED and the top outlet plugged.
When this model is used as a central thermostat,
standard faucets and concealed valves can be
installed at the draw-off points. The thermostat mixer
supplies water to the hot side of the draw-off mixer and
cold water is supplied from the main.
The built-in thermostat with stop-valve (34 909)
only shuts off the upper outlet. An additional stop
valve must be fitted if the lower outlet is used.
Specifications
Minimum flow pressure without downstream
resistances
Minimum flow pressure with downstream
resistances
Max. operating pressure
Recommended flow pressure
Test pressure
Max. water temperature at hot
water inlet
Temperature range adjustable on
the scale marked handle
Safety check
Hot water temperature at supply connection 4 °F
(2 °C) higher than mixed water temperature.
Hot water connection
Cold water connection
Flow rate
34 907: aprox. 26L/min or 7.0 gpm/20 psi
aprox. 40L/min or 11.0 gpm/45 psi
aprox. 60L/min or 15.5 gpm/100 psi
34 909: aprox. 16L/min or 4.0 gpm/20 psi
aprox. 24L/min or 7.0 gpm/45 psi
aprox. 35L/min or 9.0 gpm/100 psi
Minimum flow rate
At flow pressures above 72.5 psi, we recommend
installing a pressure reducer in the supply pipe.
1
English
Prevention of frost damage
When the domestic water system is drained, the
thermostat mixers must be drained separately, since
check valves are installed in the hot and cold water
connections.
The complete thermostat assembly and check valves
must be unscrewed and removed.
Rough installation
- Prepare wall for mixer.
- Observe the installation depth in accordance
with the instructions given on the fitting template,
see fig. [2].
x = Face of tiles
y = Front face of fitting template
z = Resting point for spirit level
- Align the mixer horizontally, vertically and parallel to
the wall, see fig. [3] (place a spirit level on the cams
or face of the fitting template).
- Install concealed thermostat mixer module in wall
and connect pipes, see fig. [4].
Permissible tolerances are given in the dimensional
drawing, see fold-out page I.
The housing is provided with pre-drilled holes (B) to
facilitate mounting the fitting to the wall, see fig. [3].
- Do not solder the connections between the
pipes and valve body, otherwise the built-in check
valves may be damaged.
- Seal the unused outlets with screw plugs.
7.25 psi
Important!
14.5 psi
- The hot water supply must be connected on the
left (marked - W - (-H-) [red] on housing) and the
145 psi
cold water supply on the right (marked - K - (-C-)
14.5 psi - 72.5 psi
[blue] on housing).
232 psi
176 °F
Check the pipework and connections to the
(80 °C)
thermostat mixer for leaks.
70 - 110 °F
(20 - 43 °C)
Flush pipes thoroughly, see figs. [5] and [6].
100 °F (38 °C)
1. Remove screws (C) and mounting template (D), see
fig. [5].
2. Close the hot and cold water supplies.
-W - (-H-)
3. Remove non-return valves (E), see fig. [5].
red marking = left
4. Install flushing plugs (F) in non-return valve seat
-K - (-C-)
recesses, see fig. [6].
blue marking = right
5. Open the hot and cold water supplies and flush
pipes thoroughly.
6. Close the hot and cold water supplies, remove
flushing plugs (F) and reinstall non-return valves (E).
7. Open the hot and cold water supplies.
8. Reinstall mounting template (D).
1.3 gpm
Plaster and tile the wall.
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