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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.
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. operating pressure
Recommended flow pressure
Test pressure
Flow rate:
approx. 13 L/min or 3.5 gpm/20 psi
approx. 20 L/min or 5.3 gpm/45 psi
approx. 30 L/min or 8.0 gpm/100 psi
Max. water temperature at hot water inlet
Temperature range adjustable on
the scale marked handle
safety stop
Hot water temperature at supply connection 4 °F (2 °C) higher than
mixed water temperature.
Cold water connection
Hot water connection
Minimum flow rate
At a flow pressure over 72.5 psi 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 fold-out
page I, fig. [1].
In this connection, refer to the dimensional drawing.
The cold water supply must be connected on the right and the hot
water supply on the left 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 1 3/16" with an extension, see
Replacement parts, fold-out page II, ref. No. 46 238.
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
specified temperature set on the thermostat.
• After any maintenance operation on the thermoelement.
Open the shutt-off valve (A) and check the temperature of the water
with a thermometer, see fig. [2].
With the safety stop depressed, turn thermostat handle (B) until the
water temperature reaches 100 °F (38 °C).
- Unscrew cap (C), see fig. [3].
- Hold thermostat handle (B) in this position and unscrew and
remove screw (D).
- Pull off thermostat handle (B) and reinstall in such a way that
the 100 °F (38 °C) mark on the handle coincides with the
mark (E) on the mixer body.
- Hold thermostat handle (B) and reinstall screw (D).
- Screw cap (C) back on again.
1
English
Temperature limitation
The safety stop limits the temperature range to 100 °F (38 °C).
If a higher temperature is desired, the 100 °F (38 °C) limit can be
overridden by depressing the safety stop.
Adjusting the economy stop
For flow rate adjustmentment, see figs. [4] to [7].
• 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 (A1), see fig. [4].
If the stop is required to be adjusted, proceed as follows:
1. Close shut-off valve (A), see fig. [4].
2. Unscrew cap (G) and remove screw (H).
3. Remove shut-off handle (A), splined adapter (J) and economy
stop (K), see fig. [5].
7.25 psi
4. Reinstall economy stop (K) in the desired position. For
14.5 psi
adjustment range, see fold-out page III, fig. [6].
145 psi
5. Reinstall splined adapter (J) and shut-off handle (A) with
14.5 psi - 72.5 psi
economy button (A1) facing the front, see fig. [7].
232 psi
Fit screw (H) an screw cap (G) back on again.
Prevention of frost damage
When the domestic water system is drained, thermostat mixers
176 °F (80 °C)
must be drained separately, since check valves are installed in the
70 - 115 °F
cold and hot water connections. For this purpose, the mixer must
(20 - 46 °C)
be removed from the wall.
100 °F (38 °C)
Maintenance
Inspect and clean all parts, replace if necessary and grease with
= right
special valve grease (ref. No. 18 012).
= left
Shut off cold and hot water supplies.
1.3 gpm
I. Check valve, see fig. [8]
1. Disassemble mixer in reverse order, see fig. [1].
2. Remove dirt strainer (L), see fig. [8].
3. With a 12mm hexagon socket spanner, remove union nipple (M)
by turning clockwise (left-hand thread).
4. Remove check valve (N).
Reassemble in the reverse order.
II. Thermostatic cartridge, see fig. [9].
1. Unscrew cap (C).
2. Unscrew and remove screw (D) and pull off thermostat
handle (B).
3. Remove clip (O).
4. Pull off stop ring (P).
5. Remove adjusting nut (R) with overload unit (S).
6. With a 22mm open-ended spanner, unscrew and remove
thermoelement (T).
Reassemble in reverse order.
The overload unit (S) (left-hand thread) must be screwed as far as
possible in the adjusting nut (R).
Readjustment is necessary after every maintenance operation on
the thermostatic cartridge (see Adjustment).
III. Ceramic headpart, see fold-out page I, figs. [4] and [5]
1. Unscrew cap (G) and remove screw (H), see fig. [4].
2. Remove shut-off handle (A), splined adapter (J) and economy
stop (K), see fig. [5].
3. With a 17mm open-ended spanner, unscrew and remove
ceramic headpart (U).
Reassemble in the reverse order.
Replacement parts, see fold-out page II ( * = special accessories).
Care
Instructions for care of this mixer will be found in the Limited
Warranty supplement.
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