Powers 400 User Manual

OPERATION

Hot and cold water enter their respective ports and the pres­sures are equalized through the action of the balancing pop­pet (1). The entire balancing poppet assembly is contained in
a celcon chamber (2). This chamber is replaceable as a com­plete cartridge. After the hot and cold presses are equalized,
they are mixed by the action of the mixing plate (3). As the
temperature adjustment stem is rotated from shutoff to maxi­mum hot water temperature (approximately 180°), the mixing
plate passes the required proportion of hot and cold water to
produce the control point. With the adjustment stem in its full
clockwise position, shutoff is obtained by shutting off both
supplies. The maximum temperature stop (4) allows the user
to set the maximum discharge temperature. This mixer does
not recognize supply water temperature changes so any vari­ation in the water temperature will affect the control point
and the maximum temperature setting.

SPECIFICATIONS

Operating Capacity

Model 1–3

................... 9 GPM @ 45 psi (.57L/sec @ 310 kPa)

Model 4 3-port

.......... 6 GPM @ 45 psi (.38L/sec @ 310 kPa)

4-port

To p

..........6 GPM @ 45 psi (.38L/sec @ 310 kPa)

Bottom

....6 GPM @ 4S psi (.38L/sec @ 310 kPa)

Model 6

.........................6 GPM @ 45 psi (.38L/sec @ 310 kPa)

Inlet and Outlet Sizes

Model 1–3: Inlet and Top

....................................1/2″ NPT

Bottom

...........................................3/4″ NPT

Model 4–6, all ports

..............................................1/2″ NPT

Maximum pressure (static)

........................ 125 psi (862 kPa)

Maximum inlet temperature

..............................180°F (82°C)

Built-in shutoff

...................................................All models

Roughing-in template

.........................................All models

Maximum temperature adjustment

.......................All models

MAINTENANCE

Troubleshooting Pointers

What to look for if:

1. The flow of water is less than desired.
a. Valves upstream from supply not fully open.
b. Low supply pressures.
c. Accumulation of lime deposits in hot water pipes,

restricting the flow of hot water.

d. Shower head clogged.

2. Flow of water is completely shut off.
a. Valves upstream from supply completely closed.
b. Failure of hot or cold water supply pressure. The

Hydroguard is constructed to restrict the flow of water
on hot or cold water supply failure,

3. The temperature of the water goes from hot to cold when

the adjustment handle is rotated counter-clockwise.

a. The water supplies are connected to the wrong port.

4. Flow of water continues when Hydroguard is shut off.
a. Worn SHUTOFF DISCS. Replace worn disc.

5. Maximum temperature is too low.
a. Accumulation of lime deposits in hot water pipes,

which restricts the flow of hot water.

b. The concealed maximum temperature is not at its

maximum adjustment.

c. Hot water temperature too low.

TECHNICAL INSTRUCTIONS

Hydroguard 400 Valves

Models 1–6

Form TI400 v2

A Watts Industries Co.

TI400 v2 Page 2

To Remove Balancing Cartridge Assembly

1. Insert hooked ends of puller into HOT and COLD outlet
ports of Balancing Cartridge. (See figure 4)

2. Push puller clasp into notches of puller.

3. Insert screwdriver or similar type bar through puller.

4. Place a 3″ wood or plastic block (do NOT use metal)
between bar end and mixer body. Pull other end of bar.

5. Release puller clasp, spread hooked ends of puller slight­ly and remove from cartridge.

To Install Balancing Cartridge

1. Apply small amount of oil or grease or soap to inner
surface of body.

2. Align cartridge and body holes.

3. Slowly push cartridge in, side O-rings. Be careful not to

pinch side O-rings.

MAXIMUM TEMPERATURE SETTING:
MODELS 1–3

CAUTION: MAXIMUM TEMPERATURE SETTING. To change

setting, remove splined stop by slipping O-ring up on stem.
(Do not remove from stem.) Rotate temperature adjustment
stem to required maximum temperature setting. Position
splined stop on adjustment stem so that it contacts bonnet
stop, See figure 2. Slip O-ring back to original position. Shut­off is made by rotating temperature adjustment stem clock­wise. This mixer cannot sense supply water temperature
changes, so any variation in inlet temperatures will affect
control point and maximum temperature setting.

MODELS 4–6

MAXIMUM TEMPERATURE SETTING (Refer to figure 3). This
must be set on the job. Mixer will pass full HOT water.

Loosen screw B (do not remove). Rotate stem to get desired
maximum temperature. Move stop A until it touches stop C.
Tighten screw B. Special case—with high (over 140°F–60°C)
hot water. Remove screw B, turn stop A over as shown by
dashed lines (the word “HOT” will face in) replace screw B.
Reset stop A per above.

CAUTION: Adjustable stop A must be present for proper
operation.

BALANCING CARTRIDGE PULLER

Troubleshooting Recommended Repair Kit

Gasket and 1. Water leak at stem and/or bonnet 410-182
Disc Replacement 2. Flow of water continues after mixer is turned off. Includes items:

10, 14, 18, 19(2), 20(2), 23(2)

Balancing Cartridge 1. Variable or untempered discharge temperature. 410-183 (Models 1–3)
Replacement 401-175 (Models 4–6)

Includes items 18 through 24

Throttling Stem and 1. Flow continues after mixer is turned off. 410-378 (Models 1–3)
Plate Replacement 2. Handle splines on stem damaged. 401-176 (Models 4–6)

includes items 10, 14, 15, 16, 17 and 18

Note: When replacing cartridge “O” ring (item 23), coat the body surface with a small amount of grease or soap.