18 | P a g e
The pool’s chemistry must be balanced BEFORE activating the BLH. It is recommended that
you consult a pool professional for the initial balancing each season.
NOTE: At the beginning of each season, add metal remover and polymer-based algaecide
to the pool, per manufacturer’s instructions. This ensures a quick, trouble-free transfer to the
BLH system.
Mounting the BLH Control
The BLH is contained in a rain tight enclosure that is suitable for outdoor mounting. The
control box must be mounted a minimum of 5 ft. (2 meters) the horizontal distance (or more
if local codes require) from the pool/spa.
The control box is designed to mount vertically on a flat surface with the knockouts facing
downward. Since the enclosure also acts as a heat sink (disperses heat from inside the box),
it is important not to block the four sides of the control unit.
Do not mount the BLH in a panel or tightly enclosed space.
Plumbing
Ensure that the BLH installation does not constitute a cross-connection with the local potable
water supply, by consult local plumbing codes.
The cell and flow switch are plumbed in the return line to the pool. Install after (downstream)
all the pool equipment (filter, heater, solar, etc.). The kit included in the BLH provides the
necessary plumbing components for:
• 2” (51mm) rigid PVC piping installation for in-ground pools
• 1 1/2-1 1/4〞(38-32mm) flexible hose connections for above ground pools
For proper plumbing, refer to the overview diagram below
Flow switch:
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