Armitage Shanks Markwik 21 - Maintenance; Adjustment of Mix Temperature; Cartridge Removal and Inspection

19
12 MAINTENANCE
12.1 Adjustment of the mix temperature:
12.2 Removal and inspection of cartridge
When installed as a TMV3 application it is a requirement that the commissioning and maintenance
procedures, detailed under 9 & 10, be carried out.
4mm
retaining
screw
upper
stop ring
lock
shield
lower
stop ring
cartridge
stop face
Figure 20 Adjusting the pre-set
temperature
Figure 21 Exploded view showing
sequential cartridge
cover button
screw
sequential
cartridge
lock shield
36mm A/F
(deep socket
required)
• Note: Cartridge is factory pre-set at 40 ± 1°C *.
• Prise out the cover button, then use a 4mm Allen key to
remove the screw.
• Lift off the lock shield.
• Remove both rotational stops from the spindle.
• Turn the spindle to achieve a 40 ± 1°C * mixed.
(Clockwise to reduce and anti-clockwise to increase).
• Ret both stop rings against the anti-clockwise rotation
stop face.
Note: 1. This is the normal maximum temperature range for
the product and as such there is a wide zone of spindle move-
ment that gives this mix temperature. For best performance
you should ret the stop at the rst point of anticlockwise rota-
tion that achieves the desired setting.
2. If you are unable to achieve 40 ± 1°C * and you have the
correct ?t’s it may be due to ne debris. See 12.2 Removal
and inspection of cartridge.
• Upon successful completion of the temperature adjustment,
conduct the Cold Water Isolation (CWI) test (See 9.5) to
ensure product is working properly.
• Ret the lock shield and record the mix temperature.
After checking that supply conditions are within the specied
parameters (see table 1), if the tting malfunctions or should the
test results fail to fall within the specied limits consider replacing
the cartridge with a new one. See 12.3 Important notes on debris.
Isolate the tting by turning the isolating valves 90 anti-clockwise
(viewed facing the iso-valve).
Remove the lock shield as described in 12.1. Unscrew the cartridge
from the body with a 36mm a/f deep socket. Inspect cartridge for
damage.
Replace cartridge if necessary and reassemble cartridge into body
.
The replacement cartridge should be tightened to a torque of 15Nm.
(To re-secure the cartridge we recommend the use of Permabond
A011 or equivalent applied to the thread of the cartridge)
Replace the lock shield and reinstate the supplies.
• Redo the Cold Water Isolation (CWI) test (See 9.5).
• Once satised with the CWI test, re-check and if necessary,
adjust the maximum mix temperature, see (See 12.1).
• Record the mix temperature.
* See section 9.6: setting temperature