Burnham RTC (Return Temperature Control) Brochure
Contents
1. RTC A BURNHAM AMERICAS BOILER COMPANY Return Temperature ae elalin me www commercialcastiron com for Commercial Boiler Applications The Burnham Commercial RTC Return Temperature Control provides an economical and effective means of boiler protection from thermal shock and sustained condensing operation The RTC monitors the boiler return water temperature and operates a 3 way diverting valve and boiler circulator to maintain a minimum return temperature of 135 F or greater An outdoor reset function is also available to reset the system water temperature based on outdoor air temperature Studies indicate that resetting the boiler and system water temperature increases effi ciency and reduces operating costs The controls is available in two configurations Basic RTC Kit and RTC kit with Outdoor Reset Control 3 way Diverting Boiler Valve Circulator RTC Return Temperature Control Includes Outdoor Reset option LCD display of return water temperature Maintains Minimum 135 F Return Water Temperature Return Sensor Monitors Boiler Return Water Temperature RTC RETURN TEMPERATURE CONTROL Why Boiler Protection Today s demands for comfort and efficiency require greater attention to the temperature and volume of return water to the boiler Many premature boiler failures can be traced to these two uncontrolled variables Operating below minimum temperatures and flow rates creates thermal shock cond2. 04 vue vum wm 20 NPT 60160854 60160864 V906 V907 V908 V910 V911 V912 1 1 r i o 3 V1105 V1106 v1109 v1110 v1111 22 TEE 60160855 60160865 V909 V910 V911 V1112 V1113 V1114 5 ew ne V1107 V1108 V1109 v1115 v1116 v1117 gt FLO 60160836 60160866 V912 V1118V1119 V1120 AE V1121 V1122 V1123 2 2 FEG 60160857 60160867 V1114 V1115 V1116 V1117 V1118 po 4 0 FLG 60160858 60160868 V1119 V1120 V1121 1122 V1123 pe 5 0 FLG 60160859 60160869 1 Requires addition of a boiler circulator to be provided by installer See back page for circulator selection 2 Pipe size varies on application Refer to amp O Manual for details 3 The 2 5 valves have diferent Cv values Refer to the amp O Manual for details 4 RTC can be used on other Burnham Commercial products Consult factory for application RTC Return Temperature Control Specification 1 The Burnham RTC Return Temperature Control is a CSA certified microprocessor based control that will control boiler return water temperature to prevent thermal shock and flue gas condensation 2 The control shall have a 120V power supply with a built in 24V transformer to power a floating action type actuator a The control shall provide a 24V floating output signal to modulate a three way or a four way diverting valve based on a signal from the return temperature sensor mounted in the return piping to the boiler The control shall have an LCD display t
3. 07 KV3007 KV4007 KV4007 KV5007 KV5007 KV5007 KV5007 C13009 C13009 C14007 C14007 C14007 DODUN ANN ADATT ERR CEET LI LA O JUIN ODN OUD BW VIN IO O N LO UW UI V1121 417 V1122 433 V1123 455 ech ech et zc zc ch ch zech zech ch zc ech 6 6 1 1 2 6 7 2 6 9 2 1160 1160 1160 PL 36 1 5 PL 75 2 PL 130 2 PL 130 2 PL 130 2 Ser 60 Mod 610 2 Ser 60 Mod 610 2 Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B PL 130 2 PL 130 2 Ser 60 Mod 610 2 Ser 60 Mod 610 2 Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 4x4x7 Ser 80 Mod 4x4x7 Ser 80 Mod 5x5x7 Ser 80 Mod 5x5x7 Ser 80 Mod 5x5x7 Ser 80 Mod 5x5x7 Ser 80 Mod 5x5x7 Ser 80 Mod 5x5x7 Ser 80 Mod 5x5x7 Ser 80 Mod 5x5x7 Ser 80 Mod 5x5x7 Ser 80 Mod 5x5x7 Ser 80 Mod 6x6x7 Ser 80 Mod 6x6x7 oll nl uw NWN wow e o Bde ll ad luij i 6 5 6 5 5 625 6 15 15 15 1 1 5 1150 1150 1150 UPS32 40 4 UPS32 80 4 UPS40 80 4 UPS40 80 4 UPS50 80 4 UPS50 80 2 TP80 40 4 TP100 40 4 TP100 40 4 TP100 80 4 UPS40 80 4 UPS40 80 4 UPS50 80 4 UPS50 80 2 TP100 40 4 TP100 40 4 UPS80 160 2 1 For any motor over 1 3 hp use additional relay for single phase power Use motor starter for 3 phase power 40 AT Circulator Sizing TACO 111 120 120 121 131 121 1635 1635 1635 1635 1635 KV3006 KV3006 KV3007
4. KV3007 KV3007 KV3007 KV3007 KV3007 KV3007 E ee WONDANHO OUN WO Se Lu LA U LA ch eee ch ech eet ch zech ch ch Den Freen Freen Dn Dn N NS NS P P PA Pa LA BOO BELL amp GOSSETT BOILER TOTAL GPM MODEL IMP HP RPM MODEL IMP HP RPM MODEL IMP HP RPM MODEL IMP HP RPM NRF 33 PL 36 PL 36 PL 45 PL 75 PL 75 PL 130 2 PL 130 2 PL 130 2 PL 130 2 PL 1361 1 2 PL 75 PL 75 PL 130 2 PL 130 2 PL 130 2 PL 130 2 Ser 60 Mod 610 2 Ser 60 Mod 610 2 Ser 60 Mod 610 2 Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B Ser 80 Mod 3x3x7B ee ee ee ee EE U1 U nen GRUNDFOS UI UPS32 40 4 UPS32 40 4 UPS32 40 4 UPS32 80 2 UPS32 80 2 UPS40 80 4 UPS40 80 4 UPS40 80 4 UPS40 80 4 UPS50 80 4 UPS32 40 4 UPS32 80 2 UPS32 80 2 UPS40 80 4 UPS40 80 4 UPS40 80 4 UPS50 80 4 UPS50 80 4 UPS50 80 4 UPS50 80 4 UPS50 80 4 UPS50 160 2 UPS50 160 2 UPS50 160 2 UPS100 40 4 UPS100 40 4 UPS100 40 4 UPS80 160 2 UPS80 160 2 UPS80 160 2 1 For any motor over 1 3 hp use additional relay for single phase power Use motor starter for 3 phase power Form No PL81465701000 9 07 5Ms BURNHAM COMMERCIAL AMERICA S BOILER COMPANY 2011 Burnham Commercial Lancaster PA Phone 1 888 791 3790 www b
5. itions and flue gas condensation issues each of which can shorten the life expectancy of a boiler Other factors that affect return temperature and flow include e snow melt and radiant flooring applications e complex system integration and control e outdoor reset and warm weather shutdown e misunderstanding the protection value of primary secondary systems e conversion of steam or gravity flow systems to pumped water systems while retaining the Original oversized distribution systems Standard Equipment Basic RTC Kit 3 x 12 Nipple with Tapping 24 Vac Actuator 3 way Valve J Box Mounting Bracket The concept of boiler protection has existed for many years However the primary focus in hydronic systems is often the demand and delivery design characteristics Frequently little attention is given to the heat source the boiler Controlling Return Temperatures The Burnham Commercial RTC Return Temperature Control provides an economical and effective means of boiler protection from thermal shock and sustained condensing operation By expanding the boiler envelope to incorporate a 3 way valve and flow control system the RTC Return Temperature Control maintains a minimum return water temperature of 135 F or greater RETURN _ SENSOR RTC Kit with Outdoor Reset Basic RTC Kit with additional items below 917 14 Universal Sensor for Mixing 070 Outdoor Sensor The RTC system is supplied a
6. o view system status and operating information The control shall have a non volatile memory to monitor supply and return water temperatures and boiler run times The control shall have a boiler minimum setting of 135 F and shall not be programmable any lower than 135 F The control shall have a warm weather shut down feature a heat demand input boiler contact and pump contact SR ot et et E The control must receive a heat demand before it can operate When the demand is removed the diverting valve shall fully close before it is allowed to respond to the new heat demand 9 The control shall have a test sequence to ensure proper component operation an adjustable pump post purge of zero to 240 seconds exercising of pump and diverting valve error messages when it detects a malfunction and an adjustable actuator motor speed setting of 30 to 230 seconds 10 The control shall have the ability to operate with an outdoor reset function This requires the use of a mixed water sensor and an outdoor air sensor 20 AT Circulator Sizing TACO BELL amp GOSSETT COMMERCIAL G AMERICAS BOILER COMPANY www commercialcastiron com ARMSTRONG BOILER TOTAL GRUNDFOS GPM MODEL IMP HP RPM MODEL IMP HP RPM MODEL iMP HP RPM MODEL IMP HP RPM IL 111 1615 1611 KV2006 1635 1635 KV3006 KV3006 KV3006 KV3007 KV2606 KV2006 1635 KV3006 KV3006 KV3007 KV3007 KV30
7. s a kit and can be incorporated into most hydronic hot water applica tions with minimal modifications to the system design and operation It provides a simple means for boiler protection and an opportunity to increase operational efficiency Outdoor Reset Option The addition of the outdoor reset option provides additional energy savings by modulating the system supply water temperature based upon outdoor air temperature This allows the system to closely match the heat ing needs of the building regardless of weather conditions Features Include e Indoor Outdoor Reset Control e Thermal Shock and Flue Gas Condensation Protection e Maintains Minimum Return Water Temperature e Simple Self Diagnostic Test Sequence with Error Messages e Adjustable Boiler Pump Purge e Off Season Built in Pump and Valve Exerciser e 24 Vac Floating Motor Actuator on 3 way Valve Additional Components Boiler Circulator one required per RTC kit not included Flange Kits for 3 way valves available in 2 1 2 to 5 sizes COMMERCIAL AMERICAS BOILER COMPANY www commercialcastiron com RTC Kit Selection Chart 7 SELECT BOILER SIZE BASED ON AT VALVE BASIC RTC KIT w APPROXIMATE SIZE RTC KIT OUTDOORRESET SHIPPING 20 A 40 AT 1 2 PART eS V903 1 0 NPT 60160851 60160861 v904 1 25NPT 60160852 60160862 V903 V905 V906 V904 V1104 1105 1 5 NPT 60160853 60160863 V905 V907 V908 V909 V11
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