Powers HYDROGUARD MM430 Series Owner's manual

MM430_For_PS-Sheet_Test_1.pd
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Page 1 09/14/2007
The Hydroguard® XP MM430 and LFMM430 series is a tem-
perature actuated mixing valve designed for use in hot water
distribution systems, in compliance with ASSE 1017.
Description n
Table 1, Capacity Tables, present the Hydroguard discharge capacity in gpm and l/m for various pressure differentials (the dif-
ference between the lowest inlet pressure and the discharge pressure at the Hydroguard).
Capacity n
Maximum Operating Pressure ............................. 125 psi (861 kPa)
Maximum Hot Water Temperature ...................... 200°F (93°C)
Minimum Hot Water Supply Temp . ..................... 5°F (3°C) Above Set-Point*
Temp. Adjustment Ranges ** Standard: .............. 90 - 160°F (32 - 71°C)
Low: ......................... 60 - 90°F (16 - 32 C)
Hot Water Inlet Temperature Range ................... 120 -180°F (49 - 82°C)
Cold Water Inlet Temperature Range ................. 40 - 80°F (4 - 27°C)
Listing ........................................................................ ASSE 1017
Certified .................................................................... CSA B125
* With Equal Pressure
** NOTE: Low limit cannot be less than the cold water temperature.
For best operation, hot water should be at least 5°F (3°C) above desired set
point.
Specifications n
* Minimum flow when Hydroguard is installed at or near hot water source with recirculated tempered water with continuously operating recirculating pump.
HYDROGUARD® XP Master Tempering Valves
Series MM430 and LFMM430
Technical Instructions
Flow Capacity at 50-50 mixed ratio
Pressure Drop Across Valve
Model Min. Min. Flow 5psi 10psi 20psi 30psi 45psi 60psi 70psi
Flow Rate* to ASSE 1017 CV(34 kPa) (69 kPa) (138 kPa) (207 kPa) (310 kPa) (414 kPa) (517 kPa)
MM431 and
LFMM431
0.5 gpm 3 gpm 6.32 14 gpm 20 gpm 28 gpm 35 gpm 42 gpm 49 gpm 53 gpm
1.89 lpm 11 lpm 53 lpm 76 lpm 106 lpm 132 lpm 159 lpm 185 lpm 201 lpm
MM432 and
LFMM432
0.5 gpm 4 gpm 9.49 21 gpm 30 gpm 42 gpm 52 gpm 64 gpm 74 gpm 79 gpm
1.89 lpm 15 lpm 80 lpm 114 lpm 159 lpm 197 lpm 242 lpm 280 lpm 299 lpm
MM433 and
LFMM433
0.5 gpm 5 gpm 16.44 37 gpm 52 gpm 74 gpm 90 gpm 110 gpm 127 gpm 138 gpm
1.89 lpm 19 lpm 140 lpm 197 lpm 280 lpm 341 lpm 416 lpm 481 lpm 522 lpm
MM434 and
LFMM434
0.5 gpm 7 gpm 21.50 48 gpm 68 gpm 96 gpm 118 gpm 144 gpm 167 gpm 180 gpm
1.89 lpm 26 lpm 182 lpm 257 lpm 363 lpm 447 lpm 545 lpm 632 lpm 681 lpm
MM435 and
LFMM435
0.5 gpm 10 gpm 31.00 69 gpm 98 gpm 139 gpm 170 gpm 208 gpm 240 gpm 259 gpm
1.89 lpm 38 lpm 261 lpm 371 lpm 526 lpm 644 lpm 787 lpm 908 lpm 980 lpm
IS-P-MM430
Advanced Thermal Activation
WARNING
!
TO ENSURE THE ACCURATE AND
RELIABLE OPERATION OF THIS PRODUCT,
IT IS ESSENTIAL TO:
• Properly size each valve based on the
individual application.
• Properly design the recirculation system
to minimize pressure and temperature
variations.
• Conduct an annual maintenance pro-
gram to ensure proper operation of all
critical components.
THIS VALVE MUST BE USED IN
CONJUNCTION WITH TEMPERATURE
ACTUATED POINT-OF-USE DEVICES
THAT COMPLY WITH ASSE 1016, 1069, OR
1070.
FAILURE TO COMPLY WITH PROPER
INSTALLATION INSTRUCTIONS COULD
CONTRIBUTE TO VALVE FAILURE,
RESULTING IN IN JURY OR DEATH.

What to look for if:
• The flow of water is less than desired...
a. Stop valves or supply to Hydroguard not fully open.
b. Clogged checkstop strainer screens.
c. Accumulation of lime deposits around valve seats.
d. Low supply pressures.
• The flow of water is completely shut off...
a. Stop valves or supply valves are completely closed.
b. Valves downstream from Hydroguard fully closed.
c. Loss of either hot or cold water supply pressure.
• Discharge temperature varies...
a. Very large restriction in outlet flow.
b. Very large drop in inlet pressure.
c. Very large fluctuation of hot water supply temperature.
d. Worn valve seats.
e. Minimum flow requirement not achieved.
f. Lime deposits around motor, poppets and/or seat.
1. IMPORTANT: Installation should be in accordance with
acceptable plumbing practices. Flush all piping thoroughly
before installation. Installation and field adjustment are the
responsibility of the installer.
2. Valves are to be installed as close to building inlet supply as
possible to prevent/minimize pressure fluctuations.
3. Valve body can be rotated to install in multiple position due
to union inlets (see Figure 2). Make sure that union nuts are
tightened securely.
4. Connect inlets and outlet and check for leaks.
5. CAUTION: When the Hydroguard supplies tempered
water to self-closing and/or solenoid valves, provide a shock
absorber (Powers Part No. 460-353) on the discharge line.
6. Before use, check discharge temperature. Reset if
necessary.
Operation Check:
After Hydroguard is installed, make certain the supply stop
valves and strainers are free and clean and ready for operation
by disassembling checkstops as shown in servicing.
Typical Flow
Hot and cold water supplies enter Hydroguard at indicated ports,
(see Figure 1) then flow past their respective balanced poppet
plug and seats. Next, hot and cold water flow is directed to the
mixing chamber where the thermostatic actuator is located.
Temperature adjustment screw moves the actuator to determine
the discharge temperature.
With a rise in discharge temperature due to pressure or temper-
ature fluctuation on the inlet, the actuator expands, decreasing
flow of hot water. The reverse occurs with a drop in discharge
temperature.
• Cold water supply failure – causes actuator to expand allowing
the motor to drastically reduce hot water flow.*
• Hot water supply pressure failure – causes actuator to contract
allowing return spring to close cold water port*.
*When tested in accordance to conditions described in ASSE
1017.
Installation Instructions n
Operation n
Maintenance and Troubleshooting n
Figure 2 Back Outlet
Front Outlet Top Outlet
2
Figure 1
Temperature Adjustment Screw
Temperature Adjustment Locknut
Actuator
Mixing Chamber
Cold Water Seat
Hot Water Seat
Cold Water
Hot Water
Plunger

1
2
4
5 & 6
3
8
7
1
2
3
4 & 5
6
7
8
Parts List - MM431, LFMM431, MM432, LFMM432, MM433, LFMM433, MM434, LFMM434 n
Parts List - MM435, LFMM435 n
Index Description Part #
MM431 LFMM431 MM432 LFMM432 MM433 LFMM433 MM434 LFMM434
1 Checkstop Rebuild Kit 390 800 LF390 800 390 800 LF390 800 390 801 LF390 801 390 801 LF390 801
2 Plunger Kit 390 802 390 802 390 802 390 802 390 803 390 803 390 803 390 803
3 Adjusting Screw 390 688 390 688 390 688 390 688 390 688 390 688 390 688 390 688
4 O-Ring 390 805 390 805 390 805 390 805 390 806 390 806 390 806 390 806
5 Actuator - Standard Temperature 390 807 390 807 390 807 390 807 390 809 390 809 390 809 390 809
6 Actuator - Low Temperature 390 808 390 808 390 808 390 808 390 810 390 810 390 810 390 810
7 Funnel Kit 390 826 390 826 390 826 390 826 390 827 390 827 390 827 390 827
8 Locknut 1051117 1051117 1051117 1051117 1051117 1051117 1051117 1051117
Index Description Part #
MM435 LFMM435
1 Checkstop Rebuild Kit 390 811 LF390 811
2 Plunger Kit 390 812 390 812
3 O-Ring 390 813 390 813
4 Actuator - Standard Temperature 390 814 390 814
5 Actuator - Low Temperature 390 815 390 815
6 Funnel Kit 390 828 390 828
7 Adjusting Screw 390 688 390 688
8 Locknut 1051117 1051117
3

1. Remove bonnet with socket wrench
2. Lift out strainer screen.
3. Reassemble in reverse order.
1. Loosen Locknut.
2. Remove bonnet and pull out overload assembly by using a
standard pliers.
3. Lift out thermal actuator by using a needle nose pliers.
4. Reassemble in reverse order.
5. Temperature setting must be checked by an installer
before use. See temperature adjustment below.
NOTE: Before disassembling, make certain both hot and cold water supplies are shut off.
Checkstop Disassembly
Valve Disassembly
1. Remove the bottom cap. Caution: spring is under tension.
2. Pull out spring.
3. Pull out plunger using a pair of pliers.
4. To remove Funnel, you will need a deep socket wrench and
funnel removal tool.
5. Reassemble in reverse order.
6. Temperature setting must be checked by an installer
before use. See temperature adjustment below.
Note: After reassembling go back to thermal actuator section
and make sure it is sitting in its holder properly.
Temperature setting for MM430 or LFMM430 Series
Valves:
1. Turn off re-circulation pump (if one is in the system).
2. Open up enough fixtures to meet minimum flow require-
ment of:
MM431 and LFMM431 = 3 gpm (11 Lpm)
MM432 and LFMM432 = 4 gpm (15 Lpm)
MM433 and LFMM433 = 5 gpm (19 Lpm)
MM434 and LFMM434 = 7 gpm (26 Lpm)
MM435 and LFMM435 = 10 gpm (38 Lpm)
3. Loosen locknut. (see Fig. 1)
4. Turn temperature adjustment screw counter-clockwise to
increase or clockwise to decrease the outlet temperature.
(see Fig. 1)
NOTE: Please allow valve temperature to settle in before
making your next adjustment.
5. When desired temperature is set, tighten the locknut. Turn
recirculation pump back on. Close open fixtures.
To Remove The Plunger Assembly or Funnel from Bottom
To Remove Thermal Actuator from Top
Servicing n
Temperature Adjustment n
USA: Phone: [phone] • Fax [phone] • www.powerscontrols.com
Canada: Phone: [phone] • Fax [phone] • www.powerscontrols.ca
IS-P-MM430 0950 EDP# 6512300 © 2009 Powers
NOTE: AFTER COMPLETING REPAIRS,
CHECK DISCHARGE TEMPERATURE.
(115°F [46°C]). RESET IF NECESSARY.
WARNING: FAILURE TO PERFORM THIS
OPERATION COULD RESULT IN UNSAFE
DISCHARGE TEMPERATURE, WHICH MAY
CAUSE INJURY OR DEATH.
WARNING
!
A Watts Water Technologies Company
ATTENTION INSTALLER: After installation, please leave this
Instruction Sheet for occupant’s information.
IMPORTANT: Inquire with governing authorities for local
installation requirements.