RSM-1B Radiant Heating System
Contents
1. flushed at least once per year or after any introduction of air into the hot water lines This is accomplished by attaching hoses to the purge valves and using them and the isolation valves to force water through each loop one at a time 3 Troubleshooting Likely Causes 1 Pumps never run la If SP 33 Power LED is not lit check AC power at outlet 1b If above is lit but circulation pump is not running then the pump or its wiring are bad 1c Open pop off cover of SP 33 and move switch to ON This should force the output on 1 LED and injection pump will probably come on Note which of these things happens and call Solar Consultants Return the switch to AUTO and replace cover DO NOT allow the injector pump to continue to run hot water into the loops more than five minutes a Circulation pump is running but no heat is 2a If the injection pump is running feel the being supplied to the house pipe from the water heater to that pump NOT the pump itself and see if it is warm If it is not warm then your water heating is faulty or a valve has been closed not allowing the injection pump to circulate hot water into or cold water out of the loops 2b If the injection pump is not running perform the test in 1c above If the injection pump starts up you should be able to feel the pipe from the water heater getting warm and then the pipe feeding the radiant loops get warm If all this performs as it should the problem2. is set by the thermostat on your water heater not the SP 33 e When should I turn the heating system on and off The system should remain on during the heating season If the building is to be unoccupied you may wish to turn the system off if there is no danger of freezing or you can just turn the SP 33 thermostat down to maintain a safe temperature for house plants and or plumbing pipes Outside the heating season we recommend the system be turned on for fifteen minutes at least once per week A timer can be installed to do this automatically e How do I tell if the RSM is working When the power is on the power or on LED on the SP 33 should glow and the circulation pump should be running The pump makes a slight hum and after running a few minutes will be warm to the touch As more heat is needed the SP 33 will click its relay 1 LED will light and turn on the injection pump You can cause this to go on and off by adjusting the SP 33 dial 1 Description of Operation When the RSM is turned on the circulation pump and SP 33 control are energized Ina typical home installation the unit would remain on throughout the heating season While the main function of the RSM is to add heat to the slab this continual circulation helps distribute heat gained through passive means making the whole slab part of the passive solar mass and allows continuous slab temperature monitoring The RSM 1 uses an Independent Energy set point control
3. 5 gt outtofloor gt loops Isolation valves Monitors water temp and turns on temp Injection Pump as control needed Cool water Floor Pump runs a loops continuously during heating season distributing heat and monitorina temnerature 2 Maintenance Since the pumps are lubricated by the water they pump they require no maintenance but if they sit too long without running the water can leave deposits that will prevent the pump from being able to start on its own It will then have to be taken apart and freed up To prevent this we advise you to run the RSM for five minutes at least once each week during the non heating season An electronic timer can be installed to do this automatically The shutoff and purge valves are used for maintenance only and do not need to be changed in normal operation In the event of a leak in the floor loop pipes unplug the RSM and shut both isolation valves If feed water pressure is lost turn off the RSM immediately to prevent damage to the pumps Warranty is void if the module is ever operated dry Should maintenance be required for the hot water tank or hot water pipes before draining the water heater switch off the RSM and close the ball valve that supplies hot water to the RSM Only after water pressure is restored the tank is full and air has been purged from the potable lines is it safe to open the RSM feed valve and turn the unit back on The whole radiant floor piping system should be
4. Radiant Slab Module 1B User s Manual The RSM circulates and controls warm water for radiant heating It would typically be used to heat a concrete slab via embedded pipes but can feed pipes in a poured wall attached to a wood floor or in a greenhouse plant bed as well The module provides precise radiant loop temperature control 1 F by constantly monitoring return water temperature and upon demand injecting heated water from any of a variety of sources water heater boiler or solar storage tank The module includes a continuous circulation pump typically a Taco brand 008B or 009B an injection pump Taco 006B maintenance valves and a temperature control The RSM 1B is mechanically the same as the RSM 1 The difference is that it uses one SP 33 for both desired temperature and high limit control Quick Information List the essentials e How do I adjust the temperature The radiant loop temperature is set by the dial inside the control box labeled SP 33 This is under the pop off portion of the cover you do not need to unscrew the whole cover You may have the option of a remote dial RSP 33 to perform this function mounted on a wall in a convenient location Most people find one setting works for the entire heating season Since radiant heat is a gentle process if you change the temperature setting allow several hours to feel the difference The temperature of the hot water both for domestic use and to supply the RSM
5. is most likely in the SP 33 or its temperature sensor DO NOT allow the injector pump to continue to run hot water into the loops more than five minutes 3 Noises The pumps are lubricated by the water they pump The noise should be a steady hum Pinging or a soft popcorn popping indicates air in the lines this is not a dire emergency but can reduce circulation and should be dealt with by purging before Screeching indicates bearings shot turn off the RSM 1 immediately Specifications a pump flow GpM gt 1 Electrical requirements Watts 115vAC typical 100 maximum 220 Size h 24 w 24 Allow area at each end for pipe connections Options e Compact model requires only 20 x20 surface e Remote desired temperature dial for SP 33 thermostat can be installed anywhere in the house e Remote digital current temperature and desired temperature readout e Direct Current models available 4 Design changes and part substitutions may be incorporated in custom or future systems 5 Warranty Parts and workmanship are warranted by Solar Consultants for one year from the installation date Individual parts especially tanks pumps and controls are covered by additional manufacturers warranties After the first year replacement of manufacturer warranted parts may incur a labor charge Independent Energy Goldline solar controls carry a ten year warranty Replacement the first two years is at no charge two
6. is opened with a screwdriver or square key similar to a skate key LED Light Emitting Diode an efficient and long lasting semiconductor used as an indicator on many controls Pressure Relief Valve a safety valve which opens to dump fluid or water if the pressure goes beyond its set point Sometimes the set point is adjustable on solar loops it may be set from 30 to 125 p s i On a standard water heater the PRV is combined with a temperature probe so that it can open if either pressure or temperature exceed safe limits The outlet of the valve is sometimes piped to the drain pan the crawl space or outdoors Radiant Loop Low temperature hydronic heating uses large areas as the heat bearing and distribution surface as distinct from high temperature radiators Pipe laid for radiant heating therefore is set out in long runs that loop in a serpentine pattern through the mass A small floor may have only one loop but often a house will have several loops in zones These may have valves so that they can be regulated individually but often these are not needed RSM 1 RSM 1B Radiant Slab Module the circulation pump injection pump control boxes wiring piping and valves manufactured by Solar Consultants for hydronic heating The original model used separate SP 33 and 34 controls the B model uses only an SP 33 Solar fluid The fluid consists mostly of water mixed with an anti corrosive buffer propylene glycol or ethylene glycol Sola
7. r loop the portion of the system that carries the fluid that passes through the collectors to be heated by the sun This fluid is in our systems kept 6 completely separate from the domestic water Heat passes from the solar fluid to the domestic water in the heat exchanger SP 33 or 34 Set Point Control or thermostat This white box compares a dial setting with a thermistor temperature sensor to switch a relay which can turn a pump or other load on or off Tempering Valve an automatic thermostat mounted at the hot water outlet of a water heater If the outgoing water is above its set temperature the valve allows cold water to mix in Solar Consultants 601 Old Halifax Rd Louisburg NC 27549 919 831 5304 1994 Solar Consultants revised 3 17 2000 TW
8. thermostat SP 33 One of its LEDs indicates power to the unit and another marked 1 indicates the internal relay is activated output power to the injection pump is on The SP 33 is set by the user between 70 and 85 F dependent on comfort requirements in the dwelling Since this is slab temperature and not air temperature the setting usually does not need to be changed once a comfort level is determined The SP 33 compares a temperature sensor located on the radiant loop water pipe with the dial setting If the slab water is cooler than the set point heat input is called for by passing 110vAC to the injection pump which begins mixing hot water in with the cooler water circulating through the floor loops Since normally the hot input water would be above the high limit set internally by the SP 33 the addition of this heat will soon bring the temperature up and the injector pump will shut off During this period the heat is circulated through the slab In a few seconds SP 33 s sensor will cool down and the injector pump will again be turned on This cycling of the injector pump will continue until the whole radiant area slab wooden floor or walls has reached the temperature set on SP 33 The period of this cycle will depend on several factors the main ones being temperature of the inlet water and circulation flow rate Hydronic Radiant Heating Module Injection Pump operates on call for heat not to Warm water exceed 9
9. to five years at twenty five percent of list price five to ten years at fifty percent of list Taco pumps have a one year replacement repair warranty for the electrical portion and three years for the cartridge which contains all the moving parts Solar Consultants 601 Old Halifax Rd Louisburg NC 27549 919 831 5304 1994 Solar Consultants revised 12 13 2001 TW Glossary Ball Valve an in line valve that controls fluid flow They are preferable to other types in that they do not restrict flow when open and never need a washer or seal replacement Check Valve an in line valve that allows fluid to pass in only one direction Circulation Pump the larger of the two pumps in an RSM 1 it continually moves water through the floor loops It stays on throughout the heating season Diverter Valve or Bypass a T ball valve situated to direct the solar heated water into either the cold inlet of the backup water heater preheat or winter operation or directly feed the domestic hot water line solar only or summer operation Expansion Tank a small tank containing an air filled bladder surrounded by fluid As the fluid expands it compresses the air This evens out pressure fluctuations that would be caused by temperature change Injection Pump the smaller pump on an RSM 1 it is turned on by the controls as needed to add hot water to that circulating through the floor Key Vent a bleed valve used to purge air from a pipe It
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