resideo Braukmann MX Series Commercial Mixing Valves Installation Guide

resideo Braukmann MX Series Commercial Mixing Valves

LARGE FLOW FLANGED PROPORTIONAL THERMOSTATIC MIXING OR DIVERTING VALVE

APPLICATION

Any application requiring accurate control of water temperature based on mixing of hot and cold water, such as: Domestic water for hotels, schools, hospitals, nursing homes, offices, public facilities, commercial and industrial buildings, space heating, central distribution systems, heat pump systems, radiant floor heating, combo systems and industrial applications.
Installer:

1. Fill in measured discharge temperature on CAUTION label.
2. Attach CAUTION label to MX series valve.
3. Explain CAUTION label to owner.
4. Leave this instruction sheet with owner or on the job site.

Benefits
The MX Series thermostatic mixing valve provides energy savings, increased comfort and safety for the user.

PRODUCT SPECIFICATIONS

• •Dual purpose mixing or diverting valve.
• •Constant water temperature under different operating conditions.
• •Proportional valve (control of hot and cold water).
• Flow reduction in seconds if cold water supply is interrupted.
• Temperature adjustable.
• Allen wrench for temperature adjustment included.
• Install in any position, heat trapping not required.
• Recirculation connection for fast response.
• Brass / stainless steel construction.
• Moving parts Teflon® coated to prevent calcium and lime deposits.
• Tapped flange connections.
• Maximum pressure differential between hot and cold ports is 7 psi.
• ISO 9001 facility.
• Lead Free Plumbing Code Compliance: the wettable surfaces of lead-free models contain less than 0.25% of lead by weighted average.

OPERATION

Automatic operation is provided by the thermostatic element. Element will control hot and cold supply based on valve setting. If cold water is shut off, valve reduces mixed flow in seconds (speed/residual flow rates vary by size).

SPECIFICATIONS

Installation Note
The flanges are threaded 5/8 – 11 UNC. Supplied with the valve are 12 D washers and 12 back-up nuts. You must install the D washers and back-up nuts (torqued as necessary) to assure leak-tight, secure system.

Product Number| Size Flange| C v| Min. Flow (GPM)| GPM @

30 psi

| Temp. Range| Weight in Lbs (kg)| Dimensions in inches (mm)
---|---|---|---|---|---|---|---
A| B| C| D
MX131LF| 2-1/2 in.| 34.0| 8| 186| 113°-149° F

(45°-65° C)

| 51 (23.1)| 5.7 (144.8)| 5.7 (144.8)| 11.4 (289.6)| 4.0 (101.6)
MX132LF| 3 in.| 50.0| 12| 274| 113°-149° F

(45°-65° C)

| 62 (28.1)| 6.1 (154.9)| 6.1 (154.9)| 12.2 (309.9)| 4.0 (101.6)
MX 050-RP Recirculation Adapter Kit| 0.2 (0.1)|
Recirculation adapter size:

(MX131LF 1 in. and MX132LF 1-1/4 in.)

Maximum Temperature : 221° F (105° C)

| Maximum working Pressure 150 psi (1034 kPa). Minimum temperature difference between hot and mix should be 10° F (6° C).

Service

To remove dirt, flush valve. To remove calcium and lime deposits, soak valve in vinegar for 24 hours and flush or contact factory for assistance. Do not attempt to field repair this calibrated valve.

Temperature Selection

The MX Series Valves is calibrated: 113°-149° F (45°-65° C). The factory setting is 130° F (54° C). Change temperature setting with an Allen wrench, which is included. Punch through the center of the temperature range label. By turning the screw clockwise, the mix temperature increases
(counterclockwise, it decreases). Each complete turn with the Allen wrench changes the temperature by 3.6° F (2° C). Do not operate valve at temperatures outside of its calibrated range of 113°-149° F (45°-65°). Use a thermometer to verify temperature.

TYPICAL INSTALLATION DIAGRAMS

Domestic Water Mixing
Use when water temperature produced by heater is hotter than desired at point of use. Many codes require that water supplied to the system be limited to 120° F (49° C) max.

1. = Check Valve.
2. = Alternate Pump Location.
   V.= Any device which turns the domestic water system into a closed system, such as backflow preventers, check valves or pressure reducing valves.

NOTE: “V” is optional depending on local codes. If a “V” type valve is used, it is mandatory that a thermal expansion tank be installed as shown. Otherwise dangerously high pressures could result or water heater safety relief valve will frequently expel water. If a “V” device is not used, a thermal expansion tank is not required.

Space Heating

Boiler must operate at a water temperature higher than desired temperature in the heating system in order to perform at maximum efficiency. Example: Radiant floor heating.

Mixing Applications (Constant Supply Temperature)

**Diverting Application (Constant Temperature)

Hot Water Sizing Method For Mixing Valve Selection**

1. Determine Fixture Units – Table 2
2. Using Total Fixture Units determine load in Gpm from Table 3.
3. Select product based on minimum flow requirement and allowable pressure drop (20 Psi).

Table 2. Fixture Unit Worksheet.

EXAMPLE: A system with 40 Lavatory (Private), 40 Bathtubs (private) and 5 Lavatory (public) has total fixture count of 130 fixture units. From Table 3 – 130 fixture unit = 38 Gpm

Table 3. Domestic Hot Water Demand – Load Data.

Fixture Units| Gpm|  | Fixture Units| Gpm|  | Fixture Units| Gpm
---|---|---|---|---|---|---|---
2| 2| 55| 23| 350| 72
6| 4.5| 60| 24| 400| 78
10| 6.5| 70| 27| 450| 86
14| 8.5| 80| 29| 500| 93
20| 11| 90| 31| 550| 100
24| 13| 100| 33| 600| 107
30| 15| 130| 38| 650| 115
34| 16.5| 160| 43| 700| 122
40| 18.5| 200| 49| 750| 130
45| 20| 260| 58| 800| 134.5
50| 21| 300| 64| 1000| 156

Table 4. Single High Capacity MX Series Mixing Valve Selection Chart

Product

| Min Flow GPM| Outlet Size Inch| System Differential Pressure Drop (PSI)
---|---|---|---
5| 10| 15| 20| 25| 30
MX127LF| 1| 1″| 9| 13| 15| 18| 20| 22
MX128LF| 2.5| 1¼”| 21| 29| 36| 42| 47| 51
MX129LF| 3.5| 1½”| 30| 43| 52| 60| 68| 74
MX130LF| 5| 2″| 40| 57| 70| 80| 90| 99
MX131LF| 8| 2½”| 76| 108| 132| 152| 170| 186
MX132LF| 12| 3″| 112| 158| 194| 224| 250| 274

This sizing method is a general guideline. Please refer to local building and plumbing codes for additional guidance.

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