Installation; Transport And Storage; Unpacking; Installation Requirements - Grundfos AQC-D12 Instrucciones De Instalación Y Funcionamiento

9. Installation

9.1 Transport and storage

Transport device carefully, do not throw.
Store in dry conditions between -20 and +65 °C.
Caution
Store electrodes between -10 and +30 °C. Keep
protective caps moist with 3-molar potassium
chloride solution.

9.2 Unpacking

Caution
Do not allow any foreign bodies to enter!
• Check scope of delivery.
• Assemble as soon as possible after unpacking.

9.3 Installation requirements

Warning
For safety reasons, the customer must install an
earth leakage circuit breaker for the measuring
amplifier.
Non-observance of the installation requirements may
Caution
result in damage or errors in measurement!
For safety during service and maintenance, switch
off the measuring amplifier and the measuring cell at
all poles.
Note
For easy switch-off, install an all-pole mains switch in
front of the measuring amplifier.
The installation of the sample-water feed pipe must
Note not contain any copper. Copper interferes with the
measurement and can damage the electrodes.
• The location must be vibration-free, dry, dust-free and free of
corrosive, pungent fumes or aggressive solvents.
• Maximum permissible cable length:
– Individual AQC-D12 measuring cell: distance between
measuring cell and measuring amplifier or sensor interface
3 m.
– Preassembled systems with Conex DIS, DIA or DIP for
wall-mounting: completely prewired.
– Preassembled systems with Conex DIA for panel-mounting:
the distance between measuring amplifier and sensor
interface must be less than 100 m.
• Ensure a continuous supply of sample water.
• Install the measuring cell so that the sample water feed line is
as short as possible, in order to reduce the delay time of the
measuring cell.
• Observe the permissible inlet pressure and counterpressure of
the sample water.
– Fit a pressure booster pump or pressure reducer, if
necessary.
• If the counterpressure may fall below 0.3 bar or if there is an
open outflow, a pressure-loading valve must be fitted to the
outlet of the measuring cell (F). The pressure-loading valve
(V) is available with an adaptor for the measuring cell
(Grundfos product number 99253231).
• Provide possibilities to shut-off the sample water (U). You can
use the Grundfos installation set 95727420 on the discharge
side.
V
F
Fig. 9 AQC-D12 with pressure-loading valve / installation set

9.4 Mounting

The measuring cell is fastened to the mounting plate at the
factory.
The measuring cell or preassembled system must be
Caution
mounted vertically!
Individual AQC-D12 measuring cell
1. Drill two dowel holes with a diameter of 8 mm and min. 50 mm
deep. See section 8.4 Dimensions / drilling
2. Mount the measuring cell and the mounting plate on the wall
using the mounting material provided.
Fig. 10 Mounting of AQC-D12 measuring cell
Preassembled systems
1. Drill four dowel holes with a diameter of 10 mm and min. 60
mm deep. See section 8.4 Dimensions / drilling
2. Mount the preassembled system and the mounting plate on
the wall using the mounting material provided. Distance
between the mounting plate and the wall:
min. 20 mm.
Do not pinch the cable!
Caution
Observe the mounting sequence below.
Fig. 11 Mounting sequence for preassembled systems
F
U
diagram.
diagram.
20 mm
11