R156-2-0513

R156-2-0513 GIACOMINI | Alldatasheet

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Technical content

Components for boiler room ThermosTaTic mixer r156-2

Description

The R156-2 thermostatic mixer is installed on household domestic systems in order to achieve energy savings, greater comfort in the use of hot water, elimination of risks of skin burns caused by excessive operating temperatures. For this reason the thermostatic mixer is equipped with a thermal shutdown function in case of failure of the cold water supply. It can be used in boiler room at domestic hot water risers in the immediate vicinity of boilers or water tanks, or in distribution cabinets in case of domestic water systems supplied by manifolds. It is fundamentally important to install the valve on downstream of boilers in solar system installations where the water temperature in storage tanks, especially in summer, reaches very high levels, well above the temperatures of ordinary use. A wax bulb inside the thermostatic mixer is immersed in the mixed water flow assisted by a balanced system of springs. The thermostatic mixer operates to ensure that the required temperature of mixed water is maintained. Versions and product codes Product code Connection Kv R156Y223 1/2"M 1,3 R156Y224 3/4"M 1,4 R156Y225 1"M 5 R156Y226 1 1/4"M 5,8 R156Y227 1 1/2"M 11 R156Y228 2"M 12 Technical data

• Maximum working pressure (static): 10 bar
• Maximum working pressure (dynamic): 5 bar
• Temperature range: 30÷65 °C
• Maximum inlet temperature (hot water): 85 °C
• Accuracy: ± 2 °C
• Maximum inlet pressure ratio (H/C or C/H): 2:1
• Minimum temperature difference between hot water inlet and mixed water outlet to ensure the thermal closure function: 15 °C
• Minimum flow rate for stable operation: 9 l/min (1/2" , 3/4"); 15 l/min Materials
• Body: DZR brass EN 12165 CW602N (1/2" , 3/4") brass EN 12165 CW617N (1" , 1 1/4" , 1 1/2" , 2")
• Internal springs: stainless steel
• O-Rings: EPDM
• Handwheel: high resistance plastic Main features Thermal shutdown function In case of accidental lack of cold water at the inlet, the stopper closes the hot water passage, by stopping the outlet of the mixed water. To ensure the thermal shutdown function with flow interruption, the temperature of the hot water at the inlet, must be higher than the set one of at least 15°C (example: if set is = 45 °C, the inlet hot water must be at least 60 °C). Components Legend

1 Body 3 Tail pieces

2 Gaskets 4 Nut

The R156-2 thermostatic mixer with 7 adjustment positions allows to set the mixing temperature in range of 30÷65 °C. As stated in the table, each value of the numbering corresponds to a reference temperature. The adjustment of the thermostatic mixer is carried out by lifting the handle, rotating it until it reaches the chosen numbering and then repositioning it in the grooves present at the top of the body. Mixing temperature [°C] Product code Connect. Min. 1 2 3 4 5 Max. R156Y223 1/2" 27 30 39 48 56 65 70 R156Y224 3/4" 27 30 39 48 56 65 70 R156Y225 1" 26 30 44 51 58 65 68 R156Y226 1 1/4" 26 30 44 51 58 65 68 R156Y227 1 1/2" 25 30 38 46 55 65 69 R156Y228 2" 25 30 38 46 55 65 69 with: Thot = 70 °C - Tcold= 15 °C Phot = 3 bar - Pcold= 3 bar R156-2

Components for boiler room ThermosTaTic mixer r156-2 Installation Before installing the thermostatic mixer, the system must be inspected to ensure that its operating conditions are compatible with the valve, by controlling for example the temperature of supply, discharge pressure, etc. The system in which the mixer will be installed must be washed to remove any debris or impurities that may have accumulated during installation. The lack of this step (system washing) may affect the performance of the product. The installation of filters with adequate capacity at the entrance of the water system is highly recommended. The mixer can be installed in any position, horizontally or vertically. On the valve body are the following marks:

• Hot water inlet H
• Cold water inlet C
• Mixed water outlet MIX It is essential that access to the valve is not completely blocked, for any maintenance that may be required to the valve or connections. The piping from/to the valve must not be used to support the weight of the valve itself. Start up After installing the thermostatic mixer, the system must be tested and put into operation as explained below:
• Adjust the temperature using a suitable calibrated thermometer and measure the mixed water temperature on the output.
• Adjust the maximum temperature on the output, taking into account changes due to simultaneous use by multiple users.
• Adjust the output temperature by using the valve handle.
• To lock the setting of the valve to T MIX set, unscrew the screw on the top, remove the handle and tuck it making sure that the two blades inside the handle get stuck with that protrudes from the bottom ring (only for R156-2 Maintenance Once the mixer has been put into service, regular tests must be performed to monitor its performance. They could indicate that the valve and/or the system require maintenance. If, during these tests, the mixed water temperature has changed significantly compared to the previous tests the details given in "installation" and "start up" paragraph must be checked and made again. The following aspects should be checked regularly to ensure that optimum levels of the valve performance are maintained. Normally every 12 months, or more often if necessary:
• Check and clean filters in the system.
• Check that the check valves are working properly.
• Limescale can be removed from the internal components by immersing the valve in special products.
• When the components have been checked, the startup steps must be performed again. Dimensions C D B A GE F A B A B Product code A B C [mm] D [mm] E [mm] F [mm] G [mm] R156Y223 G 3/4" G 1/2" 58 104 42 65 52 R156Y224 G 1" G 3/4" 59 119 42,5 72,5 52 R156Y225 G 1 1/4" G 1" 89 165 58 96 73 R156Y226 G 1 1/2" G 1 1/4" 90 183 58,5 105 73 R156Y227 G 2" G 1 1/2" 123 217 80,5 125,5 93 R156Y228 G 2 1/2" G 2" 123 234 81 136,5 93 Additional information For more information, go to www.giacomini.com or contact our technical assistance service: ' +39 0322 923372 6 +39 0322 923255 * consulenza.prodotti@giacomini.com The information included in this technical sheet do not exempt the user from strictly complying with the rules and good practice standards in force. Giacomini S.p.A. Via per Alzo, 39 - 28017 San Maurizio d’Opaglio (NO) Italy