Installation Requirements #
Note: Failure to properly pre-treat the water may result in reduced membrane life and premature membrane failure and is not covered under the limited warranty.
Listed below are all the critical water specification limits and the required pre-treatment regimens.
Feed Water Limits and Recommended Pre-Treatment Approach
|
Specification |
Limit |
Recommended Pre-Treatment |
|
Water Hardness |
< 1 grain |
Ion-exchange Water Softener |
|
Iron (Fe) |
< 0.5 mg/L |
Iron Filter |
|
Iron Ferrite |
0.05 mg/L |
Iron Filter |
|
Free Chlorine (Cl2) |
< 0.1 mg/l 0.1 PPM |
Activated Carbon |
|
Turbidity (dirt) – (NTU) |
< 0.2 NTU |
Ultrafiltration (UF)/Microfiltration (MF)/Multimedia Filtration (MMF) |
|
Manganese (Mn) |
< 0.05 mg/L |
Ion-exchange Water Softener |
|
Hydrogen Sulfide (H2S) |
> 0.0 mg.L |
Oxidation, Aeration |
|
Organics |
> 0.0 mg/l |
Activated Carbon |
|
Total Dissolved Solids |
1,000 mg/l (max) |
Feed water must be below 1000 mg/l |
#
Pre-Treatment Solutions #
Water Softener
The ideal water hardless is < 1 Gain to maximize life of the membranes. The membranes will experience shorter life as the water hardness increases.
The capacity water softener needs to be sized to supply continuous soft water during the R.O. System operation.
Carbon Block for Chlorine and Chloramine Removal #
Most municipal water supplies treat their water with either chlorine or chloramine. Some water suppliers will use a combination of chlorine and chloramine or change the treatment from season to season, so you must contact your municipal water supplier and decide if the water treatment will result in free chlorine in the feed water.
The filmTec RO (Eco Pro-440i type) membranes are not tolerant towards free chlorine, and as such require a chlorine filter system to remove free chlorine from the feed water. Properly sized activated carbon filters (chlorine treated water) or catalytic carbon filters (chloramine treated water) supply the ability to remove the free chlorine from the feed water.
A weekly check needs to be performed to ensure the carbon filter system is functioning properly and the level of free chlorine measures < 0.10 PPM during system operation. Membrane failure due to chlorine exposure occurs in less than 200 hours (8 days) when exposed to a 0.5 PPM level of free chlorine.
Note: Running the system with a depleted or non-functioning chlorine filter will at once start to damage the RO membranes and avoid any warranty from the membrane manufacturer.
Additional Feed Water Pre-treatment #
Water quality varies significantly in different areas of the country. In addition, municipal water suppliers add chemicals and adjust pH levels in the water to prevent corrosion in the distribution lines.
A water analysis will need to be performed at each new site to ensure that the water and pre-treatment solutions are compatible with the RO membranes and pre-treatment approach.
System Requirements #
|
Requirements |
Standard Flow |
High Flow |
|
Dimensions |
92” w x 80” h x 37 “d |
92” w x 80” h x 45” d |
|
Operating Pressure (Water Supply) |
25GPM @ 40-60PSI |
35GPM @ 40-60PSI |
|
Operating Pressure (Air Supply) |
1 SCFM @ 80-100PSI |
|
|
Electrical Supply* |
480 VAC/3PH 24 VDC |
WARNING
The main disconnect power must be turned off at the disconnect switch on the front of the enclosure before opening the RO system controller for maintenance.
Installation Preparation #
RO system installation must conform to local plumbing, electrical, and sanitation codes. The customer is responsible for obtaining all permits and installing equipment to conform to all state and local codes.obtain all permits and install equipment to conform to all state and local codes.
Water Supply #
The water supply must be able to supply a minimum of 25 GPM (Standard Flow)/35 GPM (High Flow) at 40-60 psi to the RO unit. The flow lines need to be sized to minimize pressure drops per accepted plumbing design guidelines.
Normal operating feed flow will vary between 10 and 22 GPM depending on water temperature. At this condition, the feed water pressure does not exceed 70 psi. HF unit will vary between 15 and 35 GPM depending on the RO flow demand. If you are using a booster pump, set the booster pump to 60 psi.
Floor Drain #
All water drains and overflow lines must drain to the floor drain. The R.O. System plumbing is constructed to allow a visual indication of water flowing to the drain to help diagnose proper system operation. The RO tank has a 2” female overflow plug equipped from the manufacturer.
Compressed Air Supply #
- (1CFM 80-100PSI) Hook up ¼” push connect. The pilot-operated air valves require a supply of compressed air to operate.
- Install a compressed air supply line on the back wall of the equipment room in the vicinity of the RO System.
- Add a ball valve and fitting to allow running an airline to the pressure regulator/water separator located on the RO frame.
This air supply is required to operate the ASCO 8290 air-operated air valves. The air valve manifold is located inside the RO System controller. The regulator should be adjusted to provide a minimum of 80 psi to the pilot solenoid valves. The water separator is checked daily to ensure dry air is supplied to the solenoid valves.
Unit Placement #
Locate where the equipment will be installed with your installer. The R.O. System should be located 4-6 inches from the back wall.
There are a total of three water lines that must be attached to the unit:
- Municipal Water Feed – 1.5” Hose
- RO Reject to RO Reject Tank – 1.5” Hose
- Re-pressurization Pump to Tunnel – 1.0” Hose
Use 200 psi hose (Eaton BOSFLEX or equivalent) and heavy-duty stainless steel hose clamps on every connection to ensure reliable operation.
Lines should be positioned to minimize bends, and lines from tanks should hang in a manner to minimize loading on the stainless fittings.
If needed, install additional clamps or hose supports to RO frame to reduce movement of hoses during operation.
Reverse Osmosis System Identification #
Note: See APPENDIX 1 for more R.O. System identification.