Flomatic C152E Installation Manual

Cycle Gard® I Installation Instructions

Model C152E ½” thru1-¼”

NOTICE: Annual inspection and maintenance is required of all plumbing system
components. To ensure proper performance and maximum life, this product must
be subject to regular inspection, testing and cleaning.
Regulators in series: Where the desired pressure reduction is more then a 4 to 1
ratio (i.e.. 200psi to 50psi), multiple regulators in series should be installed.
DIAPHRAGM WARNING: Loosen jamb nut and adjustment screw slowly. Look for
any trapped water pressure under the diaphragm. Relieve pressure before removing
cover.
CAUTION: Anytime a reducing valve is adjusted, a pressure gauge must be used
downstream to verify correct pressure setting. To properly adjust the downstream
pressure there needs to be flow through the valve in the direction of the flow arrow
on the body. Do not bottom out adjustment screw on cover. Valve may be installed
in any position.

NOTE: Motor manufacturers recommend using a flow sleeve to be sure the motor is
properly cooled at low flow rates. Do not exceed 125 psi pressure differential across
the valve.

INSTALLATION INSTRUCTIONS:

1. Before installing reducing valve, flush out line to remove loose dirt and scale which might damage disc and seat and
turn power off. Install valve in line with arrow on valve body pointing in direction of flow. If the valve is equipped with (2)
union ends if only one is required, install the union end on the downstream side regulated pressure side of valve.

2. Install the valve downstream of the pump
and before the pressure switch and tank.

Note: If there are any water outlets such
as yard hydrant of supply between the
pump and Cycle Gard ® I install a by-pass
with a check valve around the valve.

Warning- This pressure will be unregulated
pressure. Not recommended for high
capacity and pressure pumps. The check

valve shall be installed with flow going in
the opposite direction of the Cycle Gard® I.
this allows for free flow around the Cycle
Gard® I unit to provide tank pressure to
the yard hydrant or outlet (see illustration).

3. Pre-charge pressure in the tank should be 5 to 10 psi lower than pressure switch turn on pressure. All valves are
factory pre-set to 50 psi. To re-adjust reduced pressure loosen outer jam nut and turn adjustment screw clockwise (into
cover) to increase downstream pressure, or turn counterclockwise (out of cover) to lower downstream pre ssure. Valve
may be installed in the horizontal or vertical position. Open a line downstream and allow pump to turn on, then slowly
close supply valve downstream until demand is roughly around 2 to 3 GPM. Then adjust the valve until the downstream
pressure is constant, at about 10 psi lower then the cut off pressure of the pressure switch setting. Close off
downstream valve and the pressure tank will fill up at about 1 GPM at 50 PSI differential, 1.5 GPM at 100 PSI differential
for the 1” and 1-1/4” only.

Note: In systems using a small tank with 5 gallons or less of drawdown, adjust the regulated downstream valve
pressure to the same as the cut in (pump on) pressure setting of the pressure switch. For example if your system is
using a 40/60 pressure switch setting set your regulated downstream valve pressure at 40 psi. For longer run rimes set
your regulated pressure closer to the cut on (pump on) pressure setting on the pressure switch.

Danfoss Flomatic Corp, 15 Pruyn’s Island, Glens Falls, New York 12801

Phone: [phone] Fax: [phone] www.flomatic.com

Danfoss Flomatic

ADJUSTING SCREW

JAM NUT

COVER

FRICTION RING

SPRING

BODY

SPRING BUTTON

CARTRIDGE ASSEMBLY

UNION DISC

UNION NUT

UNION END

C152E

Rev. 6

Cycle Gard® I Installation Instructions

Model C152E ½” thru1-¼”

General Trouble Shooting

Pipe lines in a water supply system must be of sufficient carrying capacity to maintain adequate pressure at the most
remote or highest fixture. Under the maximum probable fixture use, minimum adequate pressure is generally 8 to 15
lbs., but may be more, depending on the equipment being supplied.
Relatively high service pressures which can create high water velocities in pipe lines would allow use of smaller pipes
to satisfy fixture use. However, high velocities tend to cause whistling and humming. Reductions of pressure by the use
of a pressure reducing valve, in an attempt to eliminate the undesirable condition, may reduce pipe line capacities below
what is adequate for maximum probable use.
When high service pressures are in effect, either continuously or periodically, the application of a pressure re ducing
valve will be successful only when the installed pipe line is of adequate size to satisfy the system demand at the lower
pressure. When actual water demands are unknown, the valve size should be no less than the existing pipe size.

PROBLEM

1. Pressure and fixture flow unsteady.

A. Low water supply pressure in main supply line caused

B. Heavy periodic demands by appliances in the house.

SOLUTION:

A. Pump my need to be serviced.
B. Alternate appliance usage to reduce over usage.
C. Increase pressure.
D. House service lines may at times be inadequate for the load. Size of some pipes may need to be increased.

PROBLEM

2. Pump continues to cycle on and off

B. Valve regulated pressure is set to close to the shut off

SOLUTION:

A. Readjust pressure switch setting higher than the regulated set pressure.
B. Readjust the regulated pressure setting on the valve to the cut in pressure of the pressure switch setting. For example
40/60 switch set the valve at 40 psi
C. Replace sealing disc in valve.
D. Replace diaphragm in valve.
E. Recharge tank or replace.

PROBLEM

3. Valve appear to be noisy, hums, whistles or
chatters

A. High velocity of flow in pipelines causing vibration due to

B. Chatter usually originates with worn small washer or

SOLUTION:

A. Use a second valve to reduce the differential pressure to the original valve.
B. Replace the small washer and sealing disc.
C. Reset the air pressure in the tank to 6-10 psi below the cut in (pump on) pressure setting on the pressure switch.

Limited Three Year Warranty: Danfoss Flomatic Regulators are guaranteed against defects of material or
workmanship when used for the services recommended. If, in any recommended service a defect develops due to
material or workmanship, and the regulator is returned, freight prepaid, to us within 36 months from date of shipment
from our factory, it will be repaired or replaced free of charge. The Danfoss Flomatic Corporation liability shall be limited
to our agreement to repair or replacement of regulator only. The Danfoss Flomatic regulator described in this Bulletin is
suitable for water service only.

POSSIBLE CAUSE OR CAUSES

possibly by inadequate pump pressure.

POSSIBLE CAUSE OR CAUSES

A. Pressure switch may not be set correctly.

pressure of the pressure switch.

C. Sealing disc in valve is wore or damaged.

D. Damaged or torn diaphragm in valve.
E. Water tank has become waterlogged.

POSSIBLE CAUSE OR CAUSES

excessive pressure drop across valve.

loosely installed disc.

C. Air pressure in tank is set too high.

Danfoss Flomatic

Danfoss Flomatic Corp, 15 Pruyn’s Island, Glens Falls, New York 12801

Phone: [phone] Fax: [phone] www.flomatic.com

C152E

Rev. 6