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Minimum / Maximum Operating Pressures
20 psi (138 kPa) - 125 psi (862 kPa)
Minimum / Maximum Operating Temperatures
40°F (4°C) - 110°F (38°C)
Current Draw & Voltage
0.5 Amperes - 110 Volts Other Options Available
The control valve, fittings and/or bypass are designed to accommodate minor plumbing misalignments but are not
designed to support the weight of a system or the plumbing.
HYDROCARBONS SUCH AS KEROSENE, BENZENE, GASOLINE, ETC., MAY DAMAGE PRODUCTS THAT
CONTAIN O-RINGS OR PLASTIC COMPONENTS. EXPOSURE TO SUCH HYDROCARBONS MAY CAUSE THE
PRODUCTS TO LEAK. DO NOT USE THE PRODUCT(S) CONTAINED IN THIS DOCUMENT ON WATER SUPPLIES
THAT CONTAIN HYDROCARBONS SUCH AS KEROSENE, BENZENE, GASOLINE, ETC.
THIS WATER METER SHOULD NOT BE USED AS THE PRIMARY MONITORING DEVICE FOR CRITICAL OR
HEALTH EFFECT APPLICATIONS
Do not use Vaseline, oils, other hydrocarbon lubricants or spray silicone anywhere. A silicone lubricant may be used on
black o-rings but is not necessary.
The nuts and caps are designed to be unscrewed or tightened by hand or with the special plastic wrench. If necessary a
pliers can be used to unscrew the nut or cap. Do not use a pipe wrench to tighten or loosen nuts or caps. Do not place a
screwdriver in the slots on caps and/or tap with a hammer.
Do not use pipe dope or other sealants on threads. Use Teflon tape on the threaded inlet, outlet and drain fittings. Teflon
tape is not necessary on the nut connection or caps because of o-ring seals.
After completing any valve maintenance involving the drive assembly or the drive cap assembly and pistons unplug power
source jack from the printed circuit board (black wire) and plug back in or press and hold NEXT and REGEN buttons for 3
seconds.
This resets the electronics and establishes the service piston position. The display should flash all wording, then flash the
software version and then reset the valve to the service position.
All plumbing should be done in accordance with local plumbing codes. The pipe size for the drain line should be a
minimum of ½”. Backwash flow rates in excess of 7 gpm or length in excess of 20’ require ¾” drain line.
Solder joints near the drain must be done prior to connecting the drain line flow control fitting. Leave at least 6” between
the drain line control fitting and solder joints when soldering pipes that are connected on the drain line control fitting.
Failure to do this could cause interior damage to the drain line flow control fitting.
When assembling the installation fitting package (inlet and outlet), connect the fitting to the plumbing system first and
then attach the nut, split ring and o-ring. Heat from soldering or solvent cements may damage the nut, split ring or o-ring.
Solder joints should be cool and solvent cements should be set before installing the nut, split ring and o-ring. Avoid getting
primer and solvent cement on any part of the o-rings, split rings, bypass valve or control valve.
Plug into an electrical outlet. Note: All electrical connections must be connected according to local codes. (Be certain the
outlet is uninterrupted.)
Install grounding strap on metal pipes.
This glass filled Noryl
1
(or equivalent) fully automatic control valve is designed as the primary control center to direct
and regulate all cycles of a water softener or filter. When the LETCV1F control valve is manufactured as a softener, the
control valve can be ordered to perform downflow or upflow regeneration. When the LETCV1F control valve is set up as a
filter, the control valve can be set to perform downflow regeneration or simply backwash. The control valve can be set to
regenerate on demand (consumption of a predetermined amount of water) and/or as a time clock (passage of a particular
number of days). The control valve can be set so that a softener can meet the Water Quality Association (WQA) Standard
S100 or NSF/ANSI Standard 44 efficiency rating.
It is not recommended to change control valves from downflow to upflow brining or vice versa in the field. The
valve bodies for downflow and upflow are unique to the regeneration type and should not be interchanged. A
mismatch of valve body and regeneration piston will result in hard water bypass during service.
OPERATING PARAMETERS
GENERAL WARNINGS