10
Culligan® Series M2 Reverse Osmosis
10
Cat. No. 01023095
WARNING! The system must be grounded. An improperly grounded unit could cause injury
from electrical shock!
Plumbing Installation
Refer to the appropriate hydraulic schematic/flow diagram on
Feed Water Connections
Connect pipe or tubing to the Feed water inlet. Observe the following:
1. To minimize pressure loss, the pipe or tubing size should be at least 3/4”.
2. Install optional pressure gauges (quantity 2 of P/N D1006272) before and after the pre-filter to measure the
pressure differential across the filter cartridge.
3. Install a tee, with an upstream shutoff valve on the branch, before the feed flow meter to provide a connection
for introducing cleaning solutions.
4. If necessary, install a pressure regulator (100 psi downstream max. setting) in the inlet plumbing, to assure
constant pressure and to prevent harmonic vibration.
5. Install a shutoff valve in the inlet plumbing to simplify maintenance and service.
6. If the feed water can be used for a short period, install bypass plumbing around the unit.
Concentrate Water Connections
1. Direct 1/2" tubing to drain from the outlet of the unit.
2. To prevent siphoning of the water in the unit to drain, raise the concentrate plumbing above the level of the
modules and provide an anti-siphon loop.
WARNING! An air gap must be provided between the end of the concentrate tubing and the
drain to prevent back-siphoning of drain contents.
Product Water Connections
The product water exits on the pump side of the unit in either 1/2” piping or tubing. Connect the product plumbing to the
fitting on the flow meter.
CAUTION! This unit produces high quality product water. This water can be contaminated by
plumbing following the unit or it can corrode the plumbing. Use only plumbing com-
ponents of inert material that are compatible with the application.
The connection of the main product plumbing to service plumbing will depend on how the product water will be stored.
CAUTION! Reverse osmosis elements will fail immediately if product water is allowed to flow
backward into the unit.
Pressurized Storage Tank
The product water can be stored in a pressurized storage tank with the reverse osmosis unit controlled by a pressure
switch. Use the same components used for direct feed (see
) with the addition of a pressure switch which needs
to be wired to the control panel (see
for RO standard wiring). A pressurized water storage kit is available under
part number D1018976.
