Instruction Manual

Set Up Procedure n
You must follow these procedures in order to properly adjust your Hi/
Lo System. You need flow greater than the minimum shown in capac-
ity table across the valve in order to set a maximum temperature.
1. Close the low flow valve on the outlet of the low flow valve.
2. Open the ball valve at the discharge of the high flow valve.
3. Open enough fixtures to meet the minimum flow requirement as
per capacity table.
4. Set valve temperature. Refer to IS-P-LFMM430.
5. Set the PRV as follows for a 15psi differential.
a) Loosen the locknut at the top of the PRV. This must be all the
way out or you will be limiting the range of the adjustment. b)
Adjust the PRV so the outlet pressure gauge (top) reads 15psi
less than the supply pressure gauge (bottom). Turning the
adjustment screw counterclockwise will increase the differential
across the PRV (allowing the PRV to open later).
6. Close the ball valve at the discharge of the high flow valve and
open the low flow side ball valve by rotating the handle fully
counterclockwise.
7. Open enough fixtures to meet the minimum flow requirement as
per capacity table.
8. Set the temperature for the low flow valve. Refer to
IS-P-LFLM490-LFLM490-10.
9. Open the ball valve at the discharge of high flow valve.
10. Open additional fixtures to create a 20psi differential between
supply and outlet pressure gauges.
11. When water is at desired outlet temperature, verify temperature
remains at set point.
2
Supply Pressure Gauge Outlet Pressure Gauge
Lock Nut
Turn fully CCW
(counterclockwise)
before setting PRV.
Adjustment Screw
CW: Increases outlet pressure and
decreases differential across PRV or
CCW: Decreases outlet pressure and
increases differential across PRV.
Capacity n
Flow Capacity at 50-50 Mixed Ratio
Pressure Drop Across Valve
Model
Min. Flow
C
V
5psi 10psi 20psi 30psi 45psi 60psi
to ASSE 1017
(34 kPa) (69 kPa) (138 kPa) (207 kPa) (310 kPa) (414 kPa)
LFMM431HL
0.5 gpm
9.7
22 gpm 31 gpm 43 gpm 53 gpm 65 gpm 75 gpm
1.89 lpm 83 lpm 117 lpm 163 lpm 201 lpm 246 lpm 284 lpm
LFMM432HL
0.5 gpm
13.0
29 gpm 41 gpm 58 gpm 66 gpm 87 gpm 93 gpm
1.89 lpm 110 lpm 155 lpm 220 lpm 250 lpm 329 lpm 352 lpm
LFMM433HL
0.5 gpm
19.8
44 gpm 63 gpm 86 gpm 108 gpm 133 gpm 153 gpm
1.89 lpm 167 lpm 238 lpm 326 lpm 409 lpm 503 lpm 579 lpm
LFMM434HL
0.5 gpm
24.9
56 gpm 79 gpm 111 gpm 136 gpm 167 gpm 193 gpm
1.89 lpm 212 lpm 299 lpm 420 lpm 515 lpm 632 lpm 731 lpm
LFMM435HL
3.0 gpm
27.7
62 gpm 88 gpm 124 gpm 152 gpm 186 gpm 215 gpm
11.0 lpm 235 lpm 333 lpm 469 lpm 575 lpm 704 lpm 814 lpm
12. Gradually start to close fixtures to verify that the temperature
remains constant through the full range of flow.
13. For any problem, refer to Troubleshooting section of the docu-
ment or contact Powers' Technical Support Department at
1.800.669.5430 or [e-mail].
1. Flush all piping thoroughly before installing.
2. Make sure all ball valve handles are in "OFF" position.
3. In order to make any temperature adjustment to the valves,
you must open end-of-line fixtures to ensure you have ade-
quate flow across the valve.
Prior to Installation n
4. Use a thermometer at the showerhead or install an in-line
thermometer at the point-of-use.