VSP Manual - Heat-Timer Corporation
Contents
1. heat is required Check the System Start setting see pg 11 If the outdoor tempera ture sensor reading is above the setting the VSP will not give heat Also check if the VSP is in the Thermostat mode see pg 8 In the thermostat mode the VSP will never give heat if terminals EXT and COM are not shorted together OUTPUT light is FLASHING when heat is required The Output light flashes when the Secondary loop pump is running but the Injection pump is off This will occur when the VSP is satisfied with the temperature of the Secondary loop See Insufficient Heat conditions below OUTPUT light is FLASHING or ON but Secondary loop pump is not running Turn off the power to the Secondary loop pump The VSP power must remain connected Then disconnect all wires attached to the VSP Black wires Test for continuity across the Black wires If the wires are continuous the VSP is working properly Check the Secondary loop pump and its power OUTPUT light is ON but Injection pump is not running If the Output light is on the Injection pump should be running However if it is running at a very low speed it may be hard to detect It is possible to test the Injection pump output with a voltmeter which can read at least 120 VAC Warning This test can only be performed with the Injection Pump power connected The 120VAC power can cause severe personal injury This test should only be performed by a qualified electrician or electrical contractor Place t2. sensor then the setting must be set to the boiler manufacturer s specification The Set Point SP should be set to the desired temperature for the Secondary loop The Setback Sb value determines how many degrees the Secondary loop temperature will be decreased when the EXT Input in the Setback mode see pg 13 is shorted Start with the factory default setting of 20 F DISPLAY VALUES and ADJUSTMENTS PRESS VSP Release center button to read value LEFT If value needs adjustment press the UP or DOWN button BUTTON DISPLAY For large adjustments hold either button down Air Thisis the temperature of the outdoor sensor If it does not read Once Oidean Temp correctly check theTroubleshootinguide rEE Thisis the temperature of the water returning to the boiler If this sens Twice f is not installed it will diI PN _ If the sensor isinstalled and does not Return Temp read correctly check thd roubleshootinguide Thisis the outdoor temperature below which the VSP will activate the SES Secondary loop pump and control the variable speed pump If the QM 3 times setting isselected the VSP will activate or control both pumps System Start regardless of outdoor temperature If the OFF setting is selected the VSP will never activate either pump Set Point Operation No Effect rGt Reset Operation The higher the curve number selected the faster t 4 times temperature of the Secondary loop will be increased as outdoor Reset Ratio temperature decre
3. will halve the speed of the Injection pump until the boiler return temperatures recover Check if the VSP is in Setback and therefore running lower water tempera tures If neither of these conditions are causing insufficient heat then adjust the Set Point see pg 13 14 SENSORS Each of the three VSP sensors are interchangeable and can be tested in the same way If the Secondary loop sensor is open or shorted the main display will show OPn or SHt If either the Outdoor or the Boiler Return sensor is open or short the display will first flash the code for the sensor either Airor rEt and then flash OPn or SHt To test the sensor remove the pair of sensor wires connected to the VSP terminals Take a resis tance reading across the detached wires going to the sensor If the reading shows OPEN or a resistance greater than 100 000Q Check the wires going to the sensor They may have been broken or become discon nected If the wires are fine check the resistance at the sensor itself If the value is still open the sensor has been damaged and needs to be replaced SHORT or a resistance less than 100Q Check the wires going to the sensor They may have become shorted together in the run of the wire If not check the resistance at the sensor itself If there still is no resistance the sensor has been damaged and needs to be replaced Resistances from 200 to 100 000Q Find the temperature that corresponds to the resistance value on the c
4. 0 F Delta T Secondary Loop 10 F Maximum BTUs Required 200 000 First calculate the Primary Loop Temperature minus the Secondary Loop Temperature 140 100 40 The Delta T of the Secondary Loop is 10 Checking the first chart Pipe Size 1 2 Globe Valve 20 the intersection of the row marked 40 Primary Secondary loop temp and the column marked 10 Delta T provides 50 000 as the maximum amount of BTUs This is too low Move on to the next chart Checking the second chart Pipe Size 1 2 Globe Valve 100 the intersection of the two values provides 112 500 as the maximum amount of BTUs This is too low Move on to the next chart Checking the third chart Pipe Size 3 4 Globe Valve 100 the intersection of the two values provides 212 500 as the maximum number of BTUs This is just slightly more than the required Maximum BTU value Use 3 4 Injection piping with any of the following pumps Taco 007 Grundfos 15 42 B amp G NRF22 injection Piping Size 1 2 Delta T of Secondary Loop Globe Valve Opening0 10 15 20 Primary Loop 100 110 000 115 000 120 000 Temperature 80 90 000 95 000 100 000 Typical 60 70 000 75 000 80 000 Maximum _ Pump Models minus 2 9 Injection Taco 007 i 40 50 000 55 000 60 000 BTUs Grundfoss 15 42 Secondary Loop 20 30 000 35 000 40 000 B amp G NRF22 Temperature 10 20 000 25 000 30 000 Injection Piping Size 1 2 I p 3 gt Globe Valve Opening 00 Delta T of Secondary Loop 10 15 20 l i Prima
5. INSTALLATION OPERATING INSTRUCTIONS A Variable Speed Pump Control The VSP is a hydronic heating control The temperature of the heating water is controlled by regulating the speed of a pump which injects water from a hot boiler loop Primary loop into a cooler heating loop Secondary loop As the speed of the pump increases more hot water is sent into the Secondary loop and the temperature of the heating water increases The VSP can be used as an outdoor reset control When the outdoor temperature falls below an adjustable start point the heating system is activated The temperature of the Secondary loop water is then automatically regulated based on outdoor temperature The outdoor reset function maintains constant and comfortable ambient building temperatures in all weather conditions The VSP can also be used as a set point control In this mode of operation the VSP will control the pump speed to hold a constant temperature determined by the user in the Secondary loop The outdoor start temperature can be set to ON so the set point will be held regardless of outside temperature The VSPis equipped with a Primary loop sensor This sensor monitors the temperature of the boiler return water If the boiler return water falls below an adjustable temperature the VSP can be configured to slow down the speed of the injection pump to help the boiler return water temperatures recover The VSP can be enabled or disabled from a standard thermosta
6. T Input can be configured to provide one of the following two functions Setback Mode e The EXT Input can be used to accept an input from an external clock to lower the temperature of the Secondary loop when the building is not occupied or when the occupants are sleeping e When the EXT to COM terminals are open the VSP will run normally e When the EXT to COM terminals are shorted together the temperature of the Secondary loop will be reduced by the number of degrees of Setback see pg 13 Thermostat Mode e The EXT Input can be used to accept an input from a thermostat to activate the heating system e When the EXT to COM terminals are open the VSP will not be active Both pump outputs will be disabled e When the EXT to COM terminals are shorted together the VSP will activate the heating system if there is a call for heat based on System Start setting described on pg 11 SENG THE OPERATING MODES Whenever the VSP is powered up it will display the software version number and then the current operating modes Each display will remain on the screen approximately 5 seconds If the modes are correct there is no need to make any adjustments e Once the modes have been set for a particular application they will be retained in memory and will not need to be reset e Note that if you do change an operating mode you will need to reset all other settings e An operating mode can only be changed when it is being displayed in the start up seq
7. ases for Reset curves see pg 12 Set Point Operation No Effect Reset Operation The Offset will adjust the calculated Secondary lop 5 times temperature determined by the outdoor temperature Reset Ratio am Setback by the amount displayed LO No Return Water Sensor Set to OFF 6 times i g With Return Water Sensor Set to the boiler manufacturer s Low Min Return specification for minimum boiler return temperature Reset Operation ONLY Thisisthe highest Secondary loop water Jti H temperature the VSP will maintain imes s IMPORTANT The VSP isnot a safety control All appropriate Hi Max Suppl ai safety controls must be installed Set Point Operation ONLY Thisisthe Secondary loop water Sie temperature the VSP will maintain 7 UMEE Set Point IMPORTANT The VSP isnot a safety control All appropriate safety controls must be installed Sb This is the number of degrees the Secondary loop water temperature 8 times will be lowered if the VSP is put into Setback Setback 9 times Secondary Loop Thisis the temperature reading of the Secondary loop sensor If it dae Default2 Temp not read correctly check th roub eshootinqguide 1 These are sensor readings They can not be adjusted 2 The display of each setting will remain active for approximately 20 seconds after the last adjustment Then the display will revert to the default reading 10 OPERATION Injection Digital display defaults to read Pee pump output secondary l
8. ecification The High Supply Ai value must be adjusted to the maximum temperature value specified for the Secondary loop components The Setback Sb value determines how many degrees the Secondary loop temperature will be decreased when the EXT Input in the Setback mode see pg 13 is shorted Start with the factory default setting of 20 F INITIAL SETTINGS FOR A SET POINT CONTROL see SP previous page After setting the operating mode the VSP will display the temperature of the Secondary loop This is the default value for the VSP display To see and or adjust the other parameters press then release the center button marked PRESS TO READ The VSP will display a code to indicate which parameter will be displayed next After two seconds the value of the parameter will be shown For those parameters where the values can be set shown on chart pg 10 press the UP or DOWN button to change the value while it is being displayed Holding down the UP or DOWN button will cause the value to change more quickly The System Start StS temperature setting is the outdoor temperature above which the VSP will not give heat Set to ON if the system set point should be held regardless of outside temperature The reS et Ratio rSt and Offset OFF values have no effect and do not need to be adjusted The LOw return LOncomes factory set to OFF This is the correct setting if you are not using the Boiler return water sensor If you do use the Boiler return
9. econdary Loop 20 510 000 425 000 340 000 255 000 170 000 127 500 Delta T of Secondary Loop 20 780 000 650 000 520 000 390 000 260 000 195 000 20 1 260 000 1 050 000 840 000 630 000 420 000 315 000 l Delta T of Secondary Loop 10 1 760 000 i 1 440 000 1 120 000 800 000 480 000 320 000 10 i 2 310 000 1 890 000 1 470 000 1 050 000 630 000 420 000 15 1 840 000 1 520 000 1 200 000 880 000 560 000 400 000 15 2 415 000 1 995 000 1 575 000 1 155 000 735 000 525 000 20 1 920 000 1 600 000 1 280 000 960 000 640 000 480 000 Delta T of Secondary Loop 20 2 520 000 2 100 000 1 680 000 1 260 000 840 000 630 000 Maximum Injection BTUs Maximum Injection BTUs Maximum Injection BTUs Maximum Injection BTUs Maximum Injection BTUs Typical Pump Models Taco 007 Grundfoss 15 42 B amp G NRF22 Typical Pump Models Taco 007 Grundfoss 15 42 B amp G NRF22 Typical Pump Models Taco 0010 Grundfoss 26 64 Typical Pump Models Taco 0012 Grundfoss 43 75 Typical Pump Models Taco 0012 Grundfoss 43 75 CAUTION Sizing Charts are based on Indusiry Standards Values are approximations only Actual piping arrangements may affect outputs The correct pipe and pump sizes for any application should be performed by a qualified engineer or contractor VSP WIRING DIAGRAM 120VAC LINE NEU Outdoor E q Sensor BLUE Wire Sensor RED D COM Screw i z
10. ge the space tempera ture See chart on 10 to adjust the OF Fset 12 Water Temperature in F Reset Ratio Curves 1 4 1 3 1 2 1 1 5 ax poga a a a E ene T ae T 170 Dale fi pas dee ae Anes dene aime A 6 1 25 1 160 Beek yaaa ca aa SF ae 51 5 150 berg Ls o AET MET AE fea Li ed APL LLL gia 421 140 Pay i ES E E S A glans any seam aisia came 190 fA ff A pce 394 120 F Les AL es ee i 24 1 110 Ws Given 1 8 1 100 d T EE E E EAEE EE O E 70 60 50 40 30 20 10 O 10 20 Outdoor Temperature in F Ratios represent Outdoor Water Offset Examples 0 Offset e130 Y E The ratiosbegin 5 at 100 Water 440 y 2 Temperature 100 70 60 50 40 Outdoor Temperature 20 Offset Sto 4 E oO The ratios begin 510 at 80 Water amp 90 2 Temperature 80 70 60 50 40 Outdoor Temperature 20 Offset 2 150 Y 7 The ratiosbegin 5 ie at 120 Water SB 130 2 Temperature 120 70 60 50 40 Outdoor Temperature LOW MINIMUM RETURN The LOw return LOr setting is designed to help speed recovery in the event of low boiler return water temperatures The boiler manufacturer may require a minimum return water temperature to protect their boiler Check with the boiler manufacturer for the specified temperature If the VSP registers that the temperature of the water returning to the boiler is below the LOw return the VSP will immedi ately halve the Injection pump speed and not allow the speed to increase again unt
11. hart If the sensor appears to be outputting correctly check that the wires were properly connected to the VSP If they were the VSP may have been damaged If the sensor is not outputting correctly take another reading at the sensor itself If this is correct the problem is in the wiring between the sensor and the VSP Otherwise the sensor has been damaged and should be replaced 15 TEMPERATURE in degrees F 0 10 20 25 30 35 40 45 50 55 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 VALUE in Ohms 42683 31215 23089 19939 17264 14985 13040 11374 9944 8714 7653 5941 4649 3667 2914 2332 1879 1524 1243 1021 842 699 583 489 412 Heat Timer Controls for the HVAC R amp Plumbing Industry Steam heating controls Hydronic heating controls Sequencing controls Radiant heat controls Digital set point controls Precision tempering valves VARIVALVE air vents 2 3 and 4 way motorized valves Snow melt controls Heat Timer Corporation 20 New Dutch Lane Fairfield NJ 07004 Phone 973 575 4004 Fax 973 575 4052 http www heat timer com HT 059220 00 REV A 16
12. he leads of the voltmeter across the power inputs of the Injection pump At the highest speed the AC Volt reading will be approximately 120VAC As the speed is decreased the reading will decrease down to approximately 10VAC At the lower speeds the reading may fluctuate by several Volts This is considered to be normal OUTPUT light is OFF or FLASHING but Injection pump is running When the Output light is off or flashing the Injection pump should not be running Check the wiring to see if any other control a HOA switch or other switch input is causing the pump to run Turn the power off to the VSP If the Injection pump continues to run the VSP is not the cause of the pump running Insufficient Heat when the OUTPUT light is ON Reset Operation Check all the settings If the Boiler Return sensor reading is below the LOwreturn setting the VSP will halve the speed of the Injection pump until the boiler return temperatures recover The temperature of the Secondary loop will never exceed the High Supply setting for any prolonged period of time Check the High Supply is not set too low Check if the VSP is in Setback and therefore running lower water temperatures If none of these conditions are causing insufficient heat then adjust the reSet ratio or OF Fset see pg 12 Insufficient Heat when the OUTPUT light is ON Set Point Operation Check all the settings If the Boiler Return sensor reading is below the LOw return setting see pg 13 the VSP
13. il the return temperature rises to the LOw return setting This means that the VSP will decrease the load on the Primary loop but will still provide some heat to the Secondary loop NOTE If a minimum return water temperature is not specified by the boiler manufacturer or if the Secondary loop size is such that it will have little impact on the Primary loop temperature the Boiler Return sensor see pg 2 may not be installed In that case it is necessary to adjust the LOwreturn setting to OFF see chart on pg 10 Otherwise set the LOw return to the boiler manufacturer s specification HIGH MAXIMUM SUPPLY Reset Operation ONLY The High Supply Hi setting is the maximum Secondary loop temperature the VSP will maintain In some applications it may be necessary to limit the temperature of the water going out to the Secondary loop This may be done for comfort or because the Secondary loop components or flooring may be damaged by high temperatures The High Supply should never be set higher than the maximum value specified by either the Secondary loop component or the flooring manufacturer Adjust the High Supply as shown on the chart pg 10 SET POINT Set Point Operation ONLY The Set Point SP setting is the Secondary loop temperature the VSP will maintain whenever there is a call for heat The Set Point should never be set higher than the maximum value specified by either the Secondary loop component or the flooring manufacturer Adju
14. jection piping diameter must be at least one pipe size smaller than the smaller of the Primary or Secondary loop piping See Sizing Charts on pages 4 and 5 Primary and Secondary pipe diameters may differ Injection Pump Pump motor type must be fractional hors ower permanent split capacitor 2 Secondary Loop Globe Valve Balances the heating sy stem CAUTION The Injection pump and pipe sizing should be performed by a qualified engineer or contractor 3 INJECTION PIPE AND PUMP SIZING CHARTS To determine the proper Injection Piping Size and appropriate pump it is necessary to know the following four items Primary Loop Temperature This is the temperature the Primary loop will maintain Secondary Loop Temperature This is the design temperature for the Secondary loop If an outdoor reset function is being employed this is the required temperature of the Secondary loop under maximum load Delta T of the Secondary Loop This is the design drop in temperature through the Secondary loop In most radiant heat applications the Delta T is 10 Other types of radiation such as baseboard have a higher design Delta T Maximum Injection BTUs This is the maximum heat requirement of the Secondary loop The Maximum Injection BTUs is based on the Injection pump running at the highest speed As the pump speed is reduced fewer BTUS will be delivered to the system EXAMPLE Primary Loop Temperature 140 F Secondary Loop Temperature 10
15. n the outdoor temperature rises above this point the Secondary Pump relay BLACK wires and the Injection pump output RED wires will be off The System Startis adjustable from 30 F to 70 F The System Start also has two special modes OFF When the System Start is set to OFF neither the Secondary loop pump nor the Injection pump will run This can be used for testing or to disable heat to the particular loop Do not use this feature to turn off pumps for maintenance For this use the safety disconnect ON When the System Start is set to ON the Secondary loop pump will run regardless of outdoor temperature The Injection pump speed will be regulated to control the temperature of the Secondary loop water temperature Follow the chart on pg 10 to adjust the System Start 11 RESET RATIO Set Point Operation reSet ratio rSt has no effect Reset Operation The reSet ratio rSt determines how the Secondary loop water temperature will vary with outside temperature With any ratio the colder it is outside the hotter the tempera ture of the Secondary loop At a 1 1 reset ratio Curve 7 a 1 degree drop in outdoor temperature will increase the Secondary loop temperature by 1 degree at the 3 1 ratio Curve 3 an outdoor temperature drop of 3 degrees will increase the Secondary loop temperature by 1 degree The ratios are adjustable from 8 1 Curve 1 for the least amount of heat to 1 4 Curve 12 for the most amount of heat see side char
16. nput for a thermostat When the thermostat input is open both pump outputs will be disabled e To change the mode hold down the center button while pushing either the UP or DOWN button to toggle between the displays of Sb and thr e When the correct mode is selected release the buttons and wait approximately 5 seconds no or YES Pump Activation every 24 hours If the display shows YES then the VSP will activate both the Secondary Loop pump and the Injection pump for 5 minutes every 24 hours Certain local codes generally only in Canada require this If the display shows no then the VSP will only run the pumps when the system requires it This setting will prevent hot water from being pumped into the Secondary loop when there is no call for heat To change the mode hold down the center button while pushing either the UP or DOWN button to toggle between the displays of YES and no When the correct mode is selected release the buttons and wait approximately 5 seconds If any changes were made to the operating modes the display will flash Then the VSP will display the temperature of the sensor in the Secondary loop ee SETTINGS FOR A RESET CONTROL see rSt previous page After setting the operating mode the VSP will display the temperature of the Secondary loop This is the default display To see and or adjust the other parameters press then release the center button marked PRESS TO READ The VSP will display a code to indicate which
17. oiler return temperatures see Low Return pg 13 e The VSP can be configured to control without this sensor input see NOTE in Low Return pg 13 It is not necessary to install this well if the input will not be used e The well should be located in the boiler return of the Primary loop after all returns HORIZONTAL PIPING CONFIGURATION The Injection piping can be installed horizontally as shown on the next page e The Injection supply piping should run horizontally from the Primary to the Secondary loop e On the Injection return piping it is necessary to install a heat trap to prevent heat from the Primary loop entering the Secondary loop when the Injection pump is not running e The return piping must drop down vertically at least 18 and then rise back up vertically at least 18 VERTICAL PIPING CONFIGURATION e The Injection piping can be installed vertically as shown on the next page e The Primary loop must be at least 18 vertically above the Secondary loop Injection System Components Secondary Loop Sensor Secondary Loop Te ue Injection Pump BOILER Secondary Loop Globe Valve Boiler Return Sensor Horizontal Piping Detail Primary Loop Secondary Loop Max 4D Maximum length of pipe between tees should not exceed 4 times the pipe diameter Min 18 Minimum vertical drop of inches on heat trap or between the Primary and Secondary loops Injection Piping 8 Min 18 Pipe Sizing The In
18. oo TE or Remote Enable Pump Starter Motor Pump Secondary Loop Sensor K Sensor Pump i Motor h k BOILER E Secondary f L jecti Loop Pum Boiler Return Injection W P p l D Must be connected directly to 120VAC motor NO PUMP STARTER If Pump Starter Motor is not rated for 120VAC power contact the factory for wiring directions CONTROL INSTALLATION MOUNTING THE CONTROL The VSP is designed to mount on a 1900 4x4 electrical box e Ifthe VSP is to be panel mounted or if additional room is needed for wiring an extension kit is available HT 908520 e Locate the VSP in a convenient location near the variable speed pump The VSP can not be mounted more than 500 from any sensor location e Mount the VSP away from excessive heat or cold Ambient operating temperature is from 20 to 120 F e After completing all the wiring connections see opposite page use the two screws provided to mount the VSP to the 1900 box INSTALLING THE SENSORS e All three sensors are interchangeable e The sensor wires can be extended up to 500 from the controller by splicing with shielded two conductor 18 gauge wire Do not connect the shield at the sensor end Do not run wires in conduit with line voltage e The Secondary loop sensor should be inserted in the well as described on pg 2 e The Boiler return water sensor if used should be inserted in the well as described on pg 2 e The Outdoor sen
19. oop temperature RED Secondary loop BLACK L pump output _ 120VAC Output light indicates BLUE power input when system is active Push these buttons to adjust Push this button to display control parameters sensor values and control LE Reset Ratio parameters LFF Offset 1 Pr Min Return FD Max Set Point L Setback SEC OUT RTN COM EXT COM Dry contact input for either Setback or Remote Enable Disable Secondary loop sensor Outdoor sensor Boiler return sensor Sensor common OUTPUT LIGHT The output light has the following three indications Light Off The heating system is not active Neither the Secondary loop pump nor the Injection pump output are active Light On The heating source output is active The Secondary loop pump relay is energized and the speed of the Injection pump is being controlled Flashing The Secondary loop pump relay is energized to circulate the water through the loop The Injection pump output is not active This would occur when there is a call for heat but the temperature of the Secondary loop is satisfied so none of the hot water from the Primary loop is needed in the Secondary loop SYSTEM START TEMPERATURE The System Start StS is the outdoor temperature below which the Secondary loop pump will be activated to circulate water through the loop and the Injection pump speed will be regulated to control the temperature of the Secondary loop water Whe
20. parameter will be displayed next After two seconds the value of the parameter will be shown For those parameters where the values can be set shown on chart pg 10 press the UP or DOWN button to change the value while it is being displayed Holding down the UP or DOWN button will cause the value to change more quickly The System Start StS temperature setting is the outdoor temperature above which the VSP will not give heat Start with the factory default setting of 60 F The reSet Ratio rSt determines how quickly the water temperature in the Secondary loop will increase as the outdoor temperature decreases see pg 12 Lower numbered curves result in lower water temperatures The factory default curve is 7 or 1 1 This means for every degree the outdoor temperature falls below the System Start temperature the Secondary loop temperature will be increased one degree For baseboard heat start with 7 For most radiant tubing applications start with 3 The Offset OFF value is added or subtracted to the calculated water temperature for the Secondary loop It effec tively moves the starting point of the reset curves up and down by the number of degrees selected see pg 12 Start with the factory default setting of 0 The LOw return LO comes factory set to OFF This is the correct setting if you are not using the Boiler return water sensor If you do use the Boiler return sensor then the setting must be set to the boiler manufacturer s sp
21. ry Loop 100 247 500 258 750 270 000 Temperature 80 202 500 213 750 225 000 Typical Maximum Pump Models 60 157 500 168 750 180 000 aries Taco 007 i minus I Injection 40 112 500 123 750 135 000 BTUs Grundfoss 15 42 Secondary Loop 20 67 500 78 750 90 000 B amp G NRF22 l Temperature 10 45 000 56 250 67 500 Injection Piping Size 3 4 Globe Valve Openingi 00 Primary Loop 100 l Temperature 80 60 l minus 40 Secondary Loop 20 Temperature 10 Injection Piping Size 1 Globe Valve Openingi 00 i Primary Loop 100 Temperature 80 l minus ay 40 Secondary Loop 20 l Temperature 10 Injection Piping Size 1 1 4 Globe Valve Openingi 00 Primary Loop 1007 Temperature 80 i minus 90 40 l Secondary Loop 20 Temperature 10 Injection Piping Size 1 1 2 Globe Valve Openingi 00 Primary Loop 100 l Temperature 80 60 minus 40 Secondary Loop 20 Temperature 10 Injection Piping Size 2 Globe Valve Openingi 00 i Primary Loop 100 Temperature 80 minus 9 l 40 Secondary Loop 20 i Temperature 10 Delta T of Secondary Loop 10 467 500 382 500 297 500 212 500 127 500 85 000 10 1 715 000 585 000 455 000 325 000 195 000 130 000 l 10 4 155 000 945 000 1 735 000 525 000 1 315 000 210 000 15 488 750 403 750 318 750 233 750 148 750 106 250 15 747 500 617 500 487 500 357 500 227 500 162 500 15 1 207 500 997 500 787 500 577 500 367 500 262 500 Delta T of S
22. sor should be mounted in the shade on the north side of the building never in direct sunlight Keep the sensor approximately 10 above ground level and away from doors windows exhaust fans or other heat sources WIRING THE SENSORS e The sensor wires have no polarity Either wire from a sensor can be connected to the appropriately marked VSP screw terminal see pg 11 or the sensor common marked COM e Either or both screw terminals marked COM can be used as the sensor common They are interchangeable e Ifthe sensor wires have been extended connect the shield to a COM terminal e The two wires from the Secondary loop sensor must be connected to the VSP front screws marked SEC and COM e The two wires from the Outdoor sensor must be connected to the VSP front screws marked OUT and COM e The two wires from the Boiler return water sensor if used must be connected to the VSP front screws marked RTN and COM If not using this sensor see the NOTE in Low Return pg 13 WIRING THE VSP POWER e Attach 120VAC line voltage to the two Blue wires extending from the back of the VSP e Use wire nuts or wrap the connections with electrical tape e Class 1 voltages must enter the 1900 box through a different opening from any Class 2 wiring WIRING THE INJECTION PUMP The Red wires provide a solid state switching output to the Injection pump e The Injection pump motor must be a fractional horsepower permanent split capacitor type motor e The ou
23. st the Set Point as shown on the chart pg 10 SETBACK The Setback Sb setting has no effect if the VSP is in Thermostat mode see pg 8 When the VSP is initialized to run in the Setback mode the EXT Input can be connected to an external clock or switch see pg 11 When the EXTto COM terminals are shorted the VSP will reduce the temperature of the Secondary loop by the number of degrees selected For instance if the calculated Secondary loop water temperature were 130 F and the Setback were set to 10 then if the EXT Input were shorted the calculated water temperature would immediately change to 120 F A rule of thumb for adjusting the Setback with baseboard radiation is to decrease the water temperature 4 for each degree you wish to lower the ambient space temperatures Therefore if you wish the space temperatures to be 5 colder at night or when the building is not occupied adjust the setback to 20 With radiant heat adjust the setback only 1 or 2 degrees for each degree you wish to lower the space temperature Warning The VSP is an operating control only If excessive temperatures will cause system damage separate limit controls must be installed 13 TROUBLESHOOTING OPERATION No Display Check the 120VAC power into the Blue input wires If power is present turn the power to the VSP off and then back on Display shows or flashes OPn or SHt Follow the procedure for SENSORS on next page OUTPUT light is OFF when
24. t With most baseboard heating applications a 1 1 Curve 7 setting is a good place to start Radiant heat applications usually require a lower curve Adjust the re Set ratioin cold weather If the ambient space temperatures are too cold in cold weather increase the curve number by one If the space temperatures are too warm in cold weather decrease the curve number by one After making a change to the ratio wait 24 hours to evaluate the impact of the change See chart pg 10 to adjust the reSet ratio OFFSET Set Point Operation OF Fset OFF has no effect Reset Operation The OF Fset OFF allows you to adjust the starting points of the Reset Ratio curves see side charts When the OF Fset is changed that change is always directly added or subtracted to the calculated water temperature For instance if the calculated Secondary loop water tempera ture were 130 F and the OF Fset were changed from 0 to 10 an increase of 10 then the calculated water tempera ture would immediately change to 140 F Adjust theOF F set in mild weather If the ambient space temperatures are warm in mild weather decrease the OF Fset If the space temperatures are cold in the mild weather increase the OF Fset The rule of thumb for baseboard radiation is to change the OF Fset by 4 for every degree you wish to change the space temperatures For radiant heat applications change the OF Fset by 1 or 2 for every degree you wish to chan
25. t or switch Or the VSP can reduce the temperature of the heating loop water when the building is not occupied or when occupants are sleeping Table of Contents adl oTi oTe EEEE EAT ET toast he AT ESE E EE meee E EAE fats pg 2 Piping Diagrams sereset erar eE aces fe es aves EEE ERE ede EAEE OE eee pg 3 la oT Ne EENE E AE A O TE E pg 4 Control Installation ie ttina aa a aaea aa iaa aa aantas a a pg 7 Display Charts 0 5 a E A A pg 10 Operation e a i ea A eee et ot pg 11 Troubleshooting ices eee es eh es a ee a ee a ed ee ea pg 14 PIPING PIPING OVERVIEW The Primary loop may have multiple injection loops or other takeoffs However the piping for each injection system must meet the requirements described below and shown on the next page e The Injection piping can be installed in either a horizontal or a vertical configuration The pipe diameters of the Primary and Secondary loops may differ e The Injection Piping diameter must be at least one pipe size smaller than the smaller of the Primary or Secondary loop piping For example if the Primary loop diameter is 1 1 4 and the Secondary loop diameter is 1 then the diameter of the Injection piping must be 3 4 or smaller See Sizing pages 4 and 5 for actual pipe size CAUTION The Injection pump and pipe sizing should be performed by a qualified engineer or contractor e The Injection pump motor must be a fractional horsepower permanent split capacitor type The Injection pump
26. tput is designed for AC power only The maximum rating for the injection pump output is 3A 1 4HP e The Red wires must be directly in series with the pump power see pg 6 The signal can not be wired through any pilot duty relays or pump starters e Safety limit switches or HOA switches must be wired in series with the pump power e Use wire nuts or wrap the connections with electrical tape e Class 1 voltages must enter the 1900 box through a different opening from any Class 2 wiring Warning This Heat Timer control is strictly an operating control it should never be used as a primary limit or safety control All equipment must have its own certified limit and safety controls required by local codes The installer must verify proper operation and correct any safety problems prior to the installation of this Heat Timer control WIRING THE SECONDARY LOOP PUMP The Black wires provide a Normally Open N O relay output for the Secondary loop pump e The Black wires are a dry contact output only They do not source any power e The Secondary loop pump relay is rated at 8A 1 8HP e Use wire nuts or wrap the connections with electrical tape e Class 1 voltages must enter the 1900 box through a different opening from any Class 2 wiring e Wire the N O dry contacts to the pump starter WIRING THE EXT INPUT e TheEXT and COM terminals can only accept a dry contact input If power is applied across these terminals the VSP may be damaged e The EX
27. uence To restart the sequence it is necessary to remove power to the VSP and then power it again e Set the operating modes as described in sequence below For C Fahrenheit or Celsius Temperature Operation e Ifthe display shows F then the VSP will operate in Fahrenheit degrees e Ifthe display shows C then the VSP will operate in Celsius degrees e To change the mode hold down the center button while pushing either the UP or DOWN button to toggle between the displays of F and C e When the correct temperature mode is selected release the buttons and wait approximately 5 seconds rSt or SP Reset or Set Point Operation e Ifthe display shows rSt then the VSP will run with as an outdoor reset control see pg 12 As it gets colder outside the VSP will automatically increase the temperature of the Secondary loop e Ifthe display shows SP then the VSP will hold the selected set point temperature in the Secondary loop To select the Set Point see chart pg 10 e To change the mode hold down the center button while pushing either the UP or DOWN button to toggle between the displays of rSt and SP e When the correct mode is selected release the buttons and wait approximately 5 seconds Sb or thr Setback or Thermostat Mode e Ifthe display shows Sb then the VSP will use the EXT Input see above for an external clock or switch to lower the temperature of the Secondary loop e Ifthe display shows thr then the VSP will use the EXT I
28. will control the amount of water pumped from the hot Primary loop into the Secondary loop e A globe type valve should be installed on the injection return piping This helps to balance the system e The distance between the injection tees should be as short as possible The maximum distance between the two tees can be no more than 4 times the pipe diameter For instance if the pipe diameter is 1 then the length of straight pipe between the two injection tees can not exceed 4 WSTACOING THE WELLS Two wells are supplied with the VSP One is for the Secondary loop sensor and one is for the Return water sensor e The wells should not be located more than 500 from the VSP controller e Both wells are 3 8 ID 3 4 WELL e The wells are designed to be installed in a tee with a 3 4 bull HT 350147 e Solder the well into the bull of the tee as shown Slide the sensor into the well after the joint has cooled Secondary Loop Well e This well should be located past the pump in the Secondary loop supply e The sensor in this well will measure the temperature of the Secondary loop The VSP will control the Injection pump based on the information SENSOR from this sensor H 904015 Boiler Return Well e The sensor in this well will measure the temperature of the water returning to the boiler e If the sensor is installed it will allow the control to reduce the demand of the Secondary loop to help speed boiler recovery in the event of low b
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