Plumbing Requirements And Installation; Water Supply; Drainage - Blue I HydroGuard HG-302 Manual De Uso

3.3

Plumbing Requirements and Installation

3.3.1 Water Supply

HydroGuard requires a pressurized water supply to the flow cell, a zero pressure (gravity) water return from
the colorimeter and a pressurized (or gravity) return from the flow cell. An isolating valve must be installed in
the main circulation pump line, between the pump and the filter as illustrated in Figure 4. Water taken after
the filter will have different chemistry than water taken before (specifically lower Cl levels). The pipe (or tube)
from the main pipe should be as short as possible, in order to minimize the delay time between the pool
water being sampled and HydroGuard testing the water and adjusting dosing levels (see section 3.1). The
inlet pressure should not exceed 14.5 psi (1.0 bar).
Inlet
60-80 L /hr
0.3-1 bar
From Pool

3.3.2 Drainage

Two drainage connections are required. A gravity drainage connection is required for the water coming from
the colorimeter. A pressurized, vacuum, or gravity connection is required from the outlet of the flow cell. The
length the colorimeter drain line should be as short as possible and must have a constant downward slope to
prevent a backup of water. The flow cell may be pressurized up to 14.5 psi (1 bar); if the flow cell drain is
connected to vacuum, the inlet pressure must be at least 7 psi (0.5 bar) greater than the drain vacuum. A
drain cap is located on the colorimeter outlet to prevent the backup of water into the colorimeter if the drain
line is blocked. A ½" NPT fitting is supplied for the colorimeter drain connection and a ¼" FNPT fitting is
supplied for the flow cell drain connection.
Figure 4: Diagram of Basic Controller Installation
Flow Cell Outlet
60-80 L/hr
0-0.9 bar
To Pool
12