HYDROGUARD
Distributed By: M&M Control Service, Inc.
www.mmcontrol.com/powershome.php
800-876-0036 847-356-0566
Technical Instructions
!
WARNING
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use infor-
mation can result in death, serious personal injury,
property damage, or damage to the equipment.
Keep this Manual for future reference.
!
WARNING
FAILURE TO COMPLY WITH PROPER INSTALLATION AND
MAINTENANCE INSTRUCTIONS COULD CONTRIBUTE TO THE
VALVE FAILURE.
This Hot Water Master Tempering Valves cannot be used for
tempering water temperature at fixtures. Severe bodily injury
(i.e., scalding or chilling) and/or death may result depending
upon system water pressure changes and/or supply water
temperature changes. ASSE standard 1016, 1069 or 1070 listed
devices should be used at fixtures to prevent possible injury.
These Hot Water Tempering Valves are designed to be
installed at or near the boiler or water heater. They are not
designed to compensate for system pressure fluctuations and
should not be used where ASSE standard 1016, 1069 or 1070
devices are required. These valves should never be used to
provide “anti-scald” or “anti-chill” service.
The components of the system must be of materials with a
construction capable of withstanding the high limit output temperatures of the water heating source.
!
WARNING
Need for Periodic Inspection and Yearly Maintenance:
Periodic inspection and yearly maintenance by a licensed contractor is required. Corrosive water conditions and/or unauthorized adjustments or repair could render the valve ineffective for
service intended. Regular checking and cleaning of the valve’s
internal components and check stops helps assure maximum
life and proper product function. Frequency of cleaning and
inspection depends upon local water conditions.
IS-P-MM430
®
XP Master Tempering Valves
Series LFMM430
Advanced Thermal Activation
Description n
The Hydroguard® XP LFMM430 series is a temperature actuated
mixing valve designed for use in hot water distribution systems, in
compliance with ASSE 1017.
Specifications 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
!
WARNING
You are required to consult the local building and plumbing
codes prior to installation. If the information in this manual is
not consistent with local building or plumbing codes, the local
codes should be followed. Inquire with governing authorities for
additional local requirements.
!
WARNING
Flush all pipes thoroughly before installation. Installation and
field adjustment are the responsibility of the installer.
* With Equal Pressure
**
NOTICE
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.
Capacity n
Distributed By: M&M Control Service, Inc.
www.mmcontrol.com/powershome.php
800-876-0036 847-356-0566
Table 1, Capacity Tables, present the Hydroguard discharge capacity in gpm and l/m for various pressure differentials (the difference
between the lowest inlet pressure and the discharge pressure at the Hydroguard).
Flow Capacity at 50-50 mixed ratio
Pressure Drop Across Valve
Model Min.
Flow Rate*
LFMM431
LFMM432
LFMM433
LFMM434
LFMM435
* Minimum flow when Hydroguard is installed at or near hot water source with recirculated tempered water with continuously operating recirculating pump.
0.5 gpm 3 gpm
1.89 lpm 11 lpm 53 lpm 76 lpm 106 lpm 132 lpm 159 lpm 185 lpm 201 lpm
0.5 gpm 4 gpm
1.89 lpm 15 lpm 80 lpm 114 lpm 159 lpm 197 lpm 242 lpm 280 lpm 299 lpm
0.5 gpm 5 gpm
1.89 lpm 19 lpm 140 lpm 197 lpm 280 lpm 341 lpm 416 lpm 481 lpm 522 lpm
0.5 gpm 7 gpm
1.89 lpm 26 lpm 182 lpm 257 lpm 363 lpm 447 lpm 545 lpm 632 lpm 681 lpm
0.5 gpm 10 gpm
1.89 lpm 38 lpm 261 lpm 371 lpm 526 lpm 644 lpm 787 lpm 908 lpm 980 lpm
Min. Flow
to ASSE 1017
5psi 10psi 20psi 30psi 45psi 60psi 70psi
CV (34 kPa) (69 kPa) (138 kPa) (207 kPa) (310 kPa) (414 kPa) (517 kPa)
6.32
9.49
16.44
21.50
31.00
14 gpm 20 gpm 28 gpm 35 gpm 42 gpm 49 gpm 53 gpm
21 gpm 30 gpm 42 gpm 52 gpm 64 gpm 74 gpm 79 gpm
37 gpm 52 gpm 74 gpm 90 gpm 110 gpm 127 gpm 138 gpm
48 gpm 68 gpm 96 gpm 118 gpm 144 gpm 167 gpm 180 gpm
69 gpm 98 gpm 139 gpm 170 gpm 208 gpm 240 gpm 259 gpm
Operation n
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 temperature 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
NOTICE
1. 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 pos-
sible 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.
Temperature Adjustment Screw
Temperature Adjustment Locknut
Actuator
Mixing Chamber
Cold Water Seat
Cold Water
Hot Water Seat
Plunger
Hot Water
!
CAUTION
Figure 1
5. 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 nec-
essary.
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.
4. Connect inlets and outlet and check for leaks.
Figure 2
Back Outlet
2
Front Outlet
Top Outlet
Parts List - LFMM431, LFMM432, LFMM433, LFMM434 n
Distributed By: M&M Control Service, Inc.
www.mmcontrol.com/powershome.php
800-876-0036 847-356-0566
Index Description
LFMM431 LFMM432 LFMM433 LFMM434
1 Checkstop Rebuild Kit LF390 800 LF390 800 LF390 801 LF390 801
2 Plunger Kit 390 802 390 802 390 803 390 803
3 Adjusting Screw 390 688 390 688 390 688 390 688
4 O-Ring 390 805 390 805 390 806 390 806
5 Actuator - Standard Temperature 390 807 390 807 390 809 390 809
6 Actuator - Low Temperature 390 808 390 808 390 810 390 810
7 Funnel Kit 390 826 390 826 390 827 390 827
8 Locknut 1051117 1051117 1051117 1051117
Parts List - LFMM435 n
3
8
1
Index Description
1 Checkstop Rebuild Kit LF390 811
2 Plunger Kit 390 812
3 O-Ring 390 813
4 Actuator - Standard Temperature 390 814
5 Actuator - Low Temperature 390 815
6 Funnel Kit 390 828
7 Adjusting Screw 390 688
8 Locknut 1051117
LFMM435
5 & 6
7
8
1
7
2
4 & 5
4
6
2
3
3
Maintenance and Troubleshooting n
Distributed By: M&M Control Service, Inc.
www.mmcontrol.com/powershome.php
800-876-0036 847-356-0566
What to look for if:
• The ow 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 ow 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.
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.
NOTICE
After reassembling go back to thermal actuator section and make
sure it is sitting in its holder properly.
Temperature Adjustment n
• 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.
Servicing n
NOTICE
Before disassembling, make certain both hot and cold water supplies are shut off.
Checkstop Disassembly
1. Remove bonnet with socket wrench
2. Lift out strainer screen.
3. Reassemble in reverse order.
Valve Disassembly
To Remove Thermal Actuator from Top
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.
To Remove The Plunger Assembly or Funnel from
Bottom
1. Remove the bottom cap.
!
CAUTION
Spring is under tension.
2. Pull out spring.
Warranty n
Temperature setting for LFMM430 Series Valves:
1. Turn off re-circulation pump (if one is in the system).
2. Open up enough fixtures to meet minimum flow requirement of:
LFMM431 = 3 gpm (11 Lpm)
LFMM432 = 4 gpm (15 Lpm)
LFMM433 = 5 gpm (19 Lpm)
LFMM434 = 7 gpm (26 Lpm)
LFMM435 = 10 gpm (38 Lpm)
3. Loosen locknut. (see Fig. 1)
4. Turn temperature adjustment screw counterclockwise to
increase or clockwise to decrease the outlet temperature.
(see Fig. 1)
NOTICE
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.
!
WARNING
Any changes in supply condition could effect the outlet water temperature. Check and adjust the valves
accordingly to prevent injury to the users. After completing repairs, check discharge temperature, (105°F
[41°C]). Reset if necessary. Failure to perform this
operation could result in unsafe discharge temperature, which may cause injury or death.
WARNING: This product contains chemicals known to the
State of California to cause cancer and birth defects or
other reproductive harm.
For more information: www.watts.com/prop65
The Seller warrants that the equipment manufactured by it and covered by this order or contract is free from defects in material and workmanship and, without
charge, equipment found to be defective in material or workmanship will be repaired, or at Seller’s option replaced F.O.B. original point of shipment, if written
notice of failure is received by Seller within one (1) year after date of shipment (unless specifically noted elsewhere), provided said equipment has been properly
installed, operated in accordance with the Seller’s instructions, and provided such defects are not due to abuse or decomposition by chemical or galvanic action.
THIS EXPRESS WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES, GUARANTEES, OR REPRESENTATIONS, EXPRESS OF IMPLIED. THERE ARE
NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE. The Seller assumes no responsibility for repairs made on the
Seller’s equipment unless done by the Seller’s authorized personnel, or by written authority from the Seller. The Seller makes no guarantee with respect to material
not manufactured by it.
A Watts Water Technologies Company
IS-P-MM430 1336 EDP# 6512300 © 2013 Powers
Loading...