Mira Vier Installation Manual page 15

Use of Warm-up Feature with Combination Boilers
When using the warm-up feature (see User Guide) with the digital mixer valve supplied
via an instantaneous water heater/combination boiler, the user may experience a
brief temperature fluctuation. This is caused by the normal operation of a standard
instantaneous water heater/combination boiler whereby the boiler will turn off when
the flow is stopped (as happens after the warm-up sequence has been completed).
Upon restart of the shower, a cold shot will be flushed through followed by a brief
hot shot until the hot water supply has stabilised.
2. Mains Pressurised Instantaneous Hot Water Shower, Heated from
a Thermal Store
Caution! Risk of product damage. Do not fit the Mira Digital Mixer - PUMPED
VALVE with Mains Pressurised Systems.
Packages of this type, fitted with a tempering valve can be used. A drop type pressure
reducing valve must be fitted (and regularly maintained) if any form of backflow
prevention device is fitted, e.g. non-return valve, PRV, then an expansion vessel
should also be fitted. This will ensure that excess expansion or pulse pressures do
not damage the product or the plumbing system. The expansion vessel may already
be fitted externally or internally within the thermal store (check with thermal store
manufacturer).
Digital Mixer
warm
Valve (HP)
ISOLATE MAINS ELECTRICITY BEFORE
REMOVING COVER!
DIGITAL MIXER 2 WIRELESS
MIRA DM2 WIRELESS
HP/COMBI
1666.009
N85A
MANUFACTURED
POWER: 230 V AC 20 W
PROTECTION: IP24
MIN. SUPPLY PRESSURE: 50 kPa (0.5 bar)
MAX. WORKING PRESSURE: 500 kPa (5 bar)
MAX. STATIC PRESSURE: 1000 kPa (10 bar) (WRAS)
MAX. SUPPLY WATER TEMP: 65 °C
POSITION APPLIANCE OR
KOHLER MIRA LTD.
GL52 5EP CHELTENHAM
TEL: (+44) 0870 241 0888
www.mirashowers.com
HOT COLD Mira Vier
F9001
Shower Fittings
hot
cold
HOT
COLD
15
1144486-W2-K