Suitable Plumbing Installations - Mira Activate Series Installation And User Manual

Suitable Plumbing Installations

Digital Mixing Valve (High Pressure/Combi)
1. Combination boiler systems - the digital high pressure/combi shower can be installed
with an instantaneous combination boiler.
2. Unvented mains pressurised system - the digital high pressure/combi shower can be
installed with an unvented, stored hot water cylinder system.
3. Mains pressurised instantaneous hot water heater - the digital high pressure/combi shower
can be installed with systems of this type with balanced pressures.
Caution: High pressure mixing valves must never be plumbed to gravity systems. This
includes mixed gravity and mains pressure e.g. gravity hot and mains cold. Doing
so will invalidate the warranty and potentially cause product and property damage.
Use of Warm-up Feature with Combination Boilers
When using the warm-up feature (see User Guide) with the digital mixing 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.
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