Automist Smartscan Hydra
®
DIOM Manual - version 3.01.0
Plumis Ltd Copyright © 2020. All Rights Reserved.
Page 58 of 116
S MA RT SC AN
®
A) First Fix - Preparing the site
IMPORTANT!
Connecting the system to the mains requires a competent electrician with 18th Edition
Electrical Qualifications. The Automist Smartscan Hydra circuit must be clearly labelled (a sticker is provided
for this purpose). Automist Smartscan Hydra requires an independent 230V A.C. / 50Hz electrical supply,
not shared with other unrelated devices. The Automist Smartscan Hydra system, fire detection and alarm
system may use this circuit, which must remain powered in the event of a fire. Power to Automist
Smartscan Hydra must be provided via an unswitched fused connection unit (FCU). Automist Smartscan
Hydra must be supplied using FP200 cable or better, ideally inside conduit or protected 50mm deep within
a wall, and with Miniature Circuit Breaker (MCB) and a Residual Current Device (RCD) (C type), or Residual
Current Breaker with Overcurrent (RCBO) (C type) protection. RCD or RCBO protection may be required,
however, by applicable electrical installation regulations, in which case the circuit design must be such that
the operation of any other RCD, RCBO or safety device does not affect the operation of Automist Smartscan
Hydra. An RCBO is preferred because if there is a fault on any one circuit it does not interfere with any
other circuit. Typically, on a split-load board, Automist Smartscan Hydra must be connected to the non-
protected side of the board. Where there are no spare ways in the existing consumer unit, or there are no
available non-RCD protected ways in the existing consumer unit, the electrician may wish to use a Henley
Block to provide new tails to a second distribution board (typically a 2- or 4-way unit) with no spare ways for
future use. When prepay meters are present an additional prepay meter should be added specifically for
Automist and housed within a lock box. The prepay meter for Automist must then be maintained with
credit beyond its expected lifetime usage (see page
95) as part of the annual maintenance
cycle.
Figure 49:
Electrical supply variations
WARNING!
Switch off electricity at the mains before working on existing circuits.
The AP08 pump is intended for domestic and residential use only and therefore is of overvoltage Category
II and has a Rated Impulse Voltage of 2.5kV. Depending on installation circumstances surge protection
devices across the incoming mains supply might be required. The Automist Smartscan Hydra unit presents
an inductive motor load and therefore only type “C” breakers are suitable. Because Automist Smartscan
Hydra is often used for life safety applications, installers must add a suitable safety margin to the MCB
ratings. The circuit supplying an Automist Smartscan Hydra unit must/should be protected by a C type
breaker (C10’ or ‘C16’ for one unit (per pump), or ‘C20’ / ‘C32’ for two Automist Smartscan Hydra units). This
must be on a C-type breaker, on an RCBO or an RCD protected circuit.
The RCD/RCBO circuit must
protect only the Automist Smartscan Hydra system and not be incorporated with any other circuit
in the property.
If the consumer unit is in the protected area, it must be protected by an electrical cover.
