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EPU‐D Display and Programming 29

059840‐00 Rev. A

Heat‐Timer Corp.

System Settings Menu

The System Settings menu is used to set the system season, day/night settings, boost adjust, system setpoint,
and thermal lockout settings.

Season

Selections:

Winter

,

Summer

Default:

Winter

Menu Path:

/System Settings > Season

Description:

Sets the current operating season.
When

Winter

is selected, the EPU‐D will operate the building heat whenever the outdoor temperature falls

below the Cutoff temperature (see “Day Cutoff” on page 30 and “N ight Cutoff” on page 31).
When

Summer

is selected, the EPU‐D will not energize the boiler burner or motorized valve actuator.

NOTE: When Season = Summer, the Season setting is located in the

/Menu > Season

menu.

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Содержание EPU-D

Страница 1: ...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 ...

Страница 2: ...ials Not Supplied 11 Design Considerations 11 Outdoor Temperature Sensor Installation 12 Heating System Sensor Installation 13 Mounting the EPU D Module 14 Mounting the Enclosure 14 Mounting the Display Module 15 Wiring the EPU D 16 Power Input Wiring 16 Output Wiring 16 Input Wiring 18 Powering On the EPU D 19 Completing the Installation 19 Initial Programming of the EPU D 20 System Startup Menu ...

Страница 3: ... may be password protected 2 Digital Display See Display and Variable Function Buttons on page 23 6 Output Connections Terminals 4 5 not used Terminals 6 7 8 Output to Boiler Burner or a Motorized Valve 3 Variable Function Buttons See Display and Variable Function Buttons on page 23 7 120Vac Power Input Connection Terminal 1 Input Line Voltage Terminal 2 Neutral Terminal 3 Ground 4 Input Connectio...

Страница 4: ... building heating needs Each cycle period usually 60 minutes long but adjustable depending on the type of radiation units consists of a Cycle ON segment and a Cycle OFF segment The length of the Cycle ON segment will vary with the outdoor temperature The colder it is outdoor the longer the Cycle ON segment Figure 2 Example 60 Minute Cycle The EPU D constantly checks the outdoor temperature by mean...

Страница 5: ... of heat throughout the building Figure 3 Example Cycles Based on Weather Conditions Cycle Length The duration of the Cycle ON period when the heat source is activated depends on four factors Outdoor temperature Outdoor Cutoff temperature Heat Adjustment setting Cycle length When the outdoor temperature is above the Outdoor Cutoff the EPU D will not call for heat When the outdoor temperature is be...

Страница 6: ...18 15 13 10 8 5 3 2 0 0 0 0 0 B 57 51 46 41 37 33 28 25 21 18 15 12 9 7 5 3 1 0 0 0 C C 59 54 48 43 38 33 29 25 21 18 15 12 9 7 5 3 1 0 0 D C C C 55 49 43 38 34 29 25 21 17 14 11 9 6 4 2 1 0 E C C C C 55 49 43 38 33 28 24 20 17 13 10 8 6 4 2 1 F C C C C C 55 49 43 37 32 27 23 19 15 12 9 7 5 3 2 G C C C C C C 54 48 42 36 31 26 22 18 14 11 8 6 4 3 H C C C C C C C 53 47 40 35 29 25 20 16 13 10 7 5 4 ...

Страница 7: ...ble Set Point This indicates that steam has gotten entirely through the system or that heat is established 3 After heat is established the Cycle ON segment of the cycle begins 4 During the Cycle ON segment the EPU D keeps the steam source activated The length of the Cycle ON segment is dependent on the outdoor temperature the Day Night setting and several user selectable adjustments that can be tu...

Страница 8: ...ation see Figure 9 on page 40 EPU D Inputs Heating System Sensor The EPU D is designed to connect to the provided Heat Timer heating system sensor p n 904220 00 The heating system sensor is located where it will show that heat has reached the furthest location in the building The EPU D uses the temperature information from the heating system sensor combined with the outdoor temperature sensor to c...

Страница 9: ...e motorized valve This feature can be used when it is desirable to deactivate the EPU D from a remote location or with another controller such as a Building Management System BMS EPU D Outputs Valve Actuator The EPU D is designed to connect to a motorized valve actuator Using the inputs from the outdoor temperature sensor and the system temperature sensor the EPU D controls the heating system by o...

Страница 10: ... 11 x 9 x 3 279 4mm x 228 6mm x 95 25mm Weight 2 5lbs 1 13kg Output Relays 1 Burner Output 1 Valve Output Output Relay Rating Burner Output 1A pilot duty at 120Vac 60Hz Valve Output 6A resistive at 120Vac 60Hz Inputs System Temperature Outdoor Temperature Remote Shutdown User Interface Digital Display Display Units Temperature F and C Status Indicators 3 LEDs Variable Function Buttons 4 ...

Страница 11: ...e supplied with the control module EPU D Control Module p n 926840 00 Two Sensors with Enclosures p n 904220 00 Wall Anchors and Screws Installation and Operation Manual p n 059840 00 Warranty Card p n 059115 00 Required Materials Not Supplied The following materials tools are required for installation but are not supplied General tool kit screwdrivers wire strippers power drill etc 18 AWG cable H...

Страница 12: ...base Use the enclosure base bottom knockout for the conduit Use the locknut to hold the conduit and enclosure base together Screw the cover to the base Make sure to seal around the sensor enclosure and wall except from the bottom of the enclosure The sensor wires can be extended up to 500 feet 152 4 meters using shielded 2 conductor 18 2 cable Heat Timer p n 703001 01 Do not connect the shield at ...

Страница 13: ...vided with the sensor Then wrap insulation around the sensor and pipe to achieve the highest accuracy The sensor wires can be extended up to 500 feet 152 4 meters using shielded 2 conductor 18 2 cable Heat Timer p n 703001 01 Do not connect the shield at the sensor However connect the shield at the control See Wiring the Heating System Sensor on page 18 CAUTION Determining the proper location for ...

Страница 14: ...evice The device can be mounted a maximum of 500 feet 152 4 meters from the sensor location but should be mounted as near as possible to avoid excessive wire runs DO NOT mount the device in a location where it will be exposed to extreme heat cold humidity or moisture 2 Remove the Enclosure Wiring Cover 1 by removing the two lower screws 2 holding it to the base 3 and then remove the Display Module...

Страница 15: ...attery Location NOTE The battery is a coin lithium battery CR2032 Heat Timer p n 020002 00 that is used to maintain the control s date and time during power outages The battery can maintain the clock for up to a total of 100 days 2 Position the Display Module into the base and secure it in place using the middle screws removed in Step 2 above NOTE Do not replace the Enclosure Wiring Cover until al...

Страница 16: ...ical power to the device before servicing or making any electrical connections Failure to do so may result in severe personal injury or death Use a separate circuit breaker for the control Do not share the control power with other major equipment pumps or motors Heat Timer recommends the installation of a surge suppressor and a power switch before the power line connection Follow all local and sta...

Страница 17: ... motorized valve Open terminal to terminal 8 on the EPU D 4 Connect a 24Vac transformer power source a Run a transformer wire through a knockout located on the bottom of the EPU D enclosure and connect terminal 7 on the EPU D to a transformer 24Vac terminal b Connect the motorized valve Common terminal to a transformer 24Vac terminal Wiring to a Boiler NOTE The EPU D does not source power to the b...

Страница 18: ...uretrol Sensor NOTES Heat Timer does not provide a Pressuretrol sensor The optional Pressuretrol sensor must be a reverse acting sensor See page 8 for a description of the sensor For acceptable sensor locations see Piping Diagrams on page 38 1 Connect wires to the Pressuretrol normally closed terminals 2 Run the wires from the Pressuretrol through a knockout located on the bottom of the EPU D encl...

Страница 19: ...wn TSTAT 1 Run the Remote Shutdown wires through a knockout located on the bottom of the EPU D enclosure 2 Connect the Remote Shutdown dry contact wires to terminals 17 and 18 on the EPU D NOTE The terminals can be configured as normally open or normally closed If connected to a remote shutdown the terminals need an open signal If connected to a TSTAT the terminals need a closed short signal Power...

Страница 20: ...tem Startup menu screens to program the unit see below 2 Configure the system settings including day night heat adjustment day night cutoff temperature boost system setpoint and thermal lockout see System Settings Menu on page 29 3 Set the day night schedule times see Schedules Menu on page 33 System Startup Menu The System Startup menu provides the options used to configure basic settings for the...

Страница 21: ...isplay Unit System Sensor Type Shutdown TSTAT Description Sets the expected signal open or short on the EPU D control Shutdown terminals 17 and 18 that allows the control to operate When Shutdown Disable is selected the control requires an open to operate and provide heat When shorted the control is disabled When Tstat Enable is selected the control requires a short to operate and provide heat Whe...

Страница 22: ...vent system freeze up Selecting Output Off causes the system to turn off the output relay No heat is provided until the sensor problem is corrected Selections Numerical values for Month Day Year and Time Menu Path System Startup Display Unit System Sensor Type Shutdown TSTAT Cycle Length Sensor Fault Set Present Date Set Present Time Description Sets the present date and time on the control The da...

Страница 23: ... the outdoor temperature sensor calls for heat Indoor Satisfied Green LED that indicates the system is in cycle Heat Circ Estab Amber LED that indicates heat circulation has been established LED Description Red Amber Green ON OFF OFF The outdoor temperature sensor calls for heat but heat established heating system sensor temperature has not been reached ON ON ON Heat circulation has been establish...

Страница 24: ...ensor Sensor Type Pressuretrol Sensor Type Message Description 1 All The battery icon blinks when the battery is weak 2 HSS Temperature When Heating System Sensor is selected as the Sensor Type the system temperature displays by default The value is shown in F or C depending on the Display Unit setting 3 Pressuretrol Temperature When Pressuretrol is selected as the Sensor Type the outdoor temperat...

Страница 25: ...0 default 20 3 Release the left most button when the desired setting is reached Resetting to Factory Default To set the EPU D back to its original factory default settings 1 Remove power from the EPU D 2 Press and hold the two right most buttons on the EPU D while powering the control on 3 Release the buttons when instructed to do so on the display A message displays stating the operating paramete...

Страница 26: ...maintenance settings Season Selections Winter Summer Default Winter Menu Path Menu Season Description Sets the current season When Winter is selected the EPU D will operate the building heat whenever the outdoor temperature falls below the Cutoff temperature see Day Cutoff on page 30 and Night Cutoff on page 31 When Summer is selected the EPU D will not energize the boiler burner or motorized valv...

Страница 27: ...amount of time specified in the Extend Day Time setting see page 28 When Schedule is selected the EPU D checks its schedule and sets the heat level accordingly Selections Day Extend Day Sched Default Day Menu Path Menu Shift From Night Description Manually shifts the EPU D from the Night schedule to the selected setting without having to change the program schedule The schedule shift takes place i...

Страница 28: ...ht Extend Day Sched Description Sets the length of time the control will extend the Day schedule when using the Shift feature see Shift From Day To or Shift From Night To on page 27 Selections None Menu Path Menu Cancel Fast Cycle Description Cancels the Fast Cycle Test see Fast Cycle Test on page 36 NOTE This menu option is used for testing purposes only and is only displayed if a Fast Cycle Test...

Страница 29: ...efault Winter Menu Path System Settings Season Description Sets the current operating season When Winter is selected the EPU D will operate the building heat whenever the outdoor temperature falls below the Cutoff temperature see Day Cutoff on page 30 and Night Cutoff on page 31 When Summer is selected the EPU D will not energize the boiler burner or motorized valve actuator NOTE When Season Summe...

Страница 30: ...ight Heat Adjust Description Controls the length of the Cycle ON segment based on the outdoor temperature as compared to the Night Cutoff setting see Night Cutoff on page 31 during nighttime operation Setting A is the lowest setting less heat P is the highest setting most heat During nighttime operation if the building is too cold set the Night Adjustment one letter higher if the building is too h...

Страница 31: ...nu Path System Settings More Settings Sys Setpoint Available When System Sensor Type Heating System Sensor Description Sets the temperature at which the heat has gotten all the way through the building heating system All radiators in the building are hot when above this temperature To determine the System Setpoint two people recommended 1 Turn off the heating system and wait until all radiators ar...

Страница 32: ...e system dissipates heat very quickly When Off is selected the EPU D will start the next heating cycle regardless of the current system temperature Selections 0 to 120 minutes Default 0 Menu Path System Sensor Type Pressuretrol System Settings Boost Adjust System Sensor Type Heating System Sensor System Settings More Settings Boost Adjust Description This option quickly returns the building to a c...

Страница 33: ...that specify the time day and night operation will begin Up to two day night schedules can be configured Set Present Date Selections Numerical values for Month Day and Year Menu Path Schedules Date Description Sets the present date on the control The date and time are used to regulate the Schedule The EPU D battery is used to maintain the date and time during power outages ...

Страница 34: ...and Night Time schedules for each day of the week Up to two day night schedules may be configured The EPU D ignores any time setting that reads time not set Selections Numerical values for Time Default 6 00Am Menu Path Schedules Day Night Sch 1 Day Time Schedules Day Night Sch 2 Day Time Description Sets the start time for the selected Day Time schedule To clear the current setting press the Prev ...

Страница 35: ...nu Path Maintenance Bypass Mode Description This option overrides the automatic operation of the heating system When Bypass is selected the EPU D output relays are activated The boiler burner is turned on and the boiler will run constantly on its own limits or the motorized valve is fully opened NOTE When Bypass is selected a warning screen displays When Auto is selected the EPU D controls the hea...

Страница 36: ...r sensor temperature reading NOTE Only trim the outdoor sensor based on an accurate thermometer reading taken where the sensor is located Selections Off On Default Off Menu Path Maintenance Fast Cycle Description This option allows for testing the boiler burner or motorized valve If Thermal Lockout is not active the control will turn on the boiler burner or open the motorized valve NOTE Fast Cycle...

Страница 37: ... Info Description The Info menu provides access to screens that display the current configuration of the EPU D Available information includes software version serial number system sensor type sensor fault setting and battery level Press the Next button to advance to the Heat Timer contact information screen ...

Страница 38: ...38 EPU D Installation and Operation Manual 059840 00 Rev A Heat Timer Corp Piping Diagrams Figure 7 EPU D Operating a Boiler in a One Pipe Steam System ...

Страница 39: ...Piping Diagrams 39 059840 00 Rev A Heat Timer Corp Figure 8 EPU D Operating a Boiler in a Two Pipe Steam System ...

Страница 40: ...40 EPU D Installation and Operation Manual 059840 00 Rev A Heat Timer Corp Figure 9 EPU D Operating a Motorized Valve in a Two Pipe Steam System ...

Страница 41: ...f range the sensor or the wiring may be defective Replace the sensor wiring Connect the sensor wires to the control and disconnect the wires from the sensor terminals Short the wires together If the display still reads Open the control is defective Replace the EPU D Control Module Display shows sensor Short Defective sensor wires or EPU D Control Module Remove the wires from the sensor terminals T...

Страница 42: ...o little heat Incorrect programming Verify the following settings Ensure the Day Night Schedules are set correctly See Day Night Sch 1 and Day Night Sch 2 on page 34 Ensure the Day and or Night Heat Adjustment is not set too low See Day Adjustment on page 30 and Night Adjustment on page 30 Ensure the Outdoor Cutoff is not set too low See Day Cutoff on page 30 and Night Cutoff on page 31 Ensure the...

Страница 43: ...59076 0 18 42683 10 12 31215 20 7 23089 25 4 19939 30 1 17264 35 2 14985 40 4 13040 45 7 11374 50 10 9944 55 13 8714 60 16 7653 70 21 5941 80 27 4649 90 32 3667 100 38 2914 110 43 2332 120 49 1879 130 54 1524 140 60 1243 150 66 1021 160 71 842 170 77 699 180 82 583 190 88 489 200 93 412 210 99 349 220 104 297 230 110 253 240 116 217 250 121 187 SHORT 100 ...

Страница 44: ...rranties on behalf of such third parties Any warranty on such products or services is from the supplier manufacturer or licensor of the product or service THE FOREGOING IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED AND HEAT TIMER CORPORATION SPECIFICALLY DISCLAIMS ANY AND ALL WARRANTIES OF MERCHANTABILITY FOR A PARTICULAR PURPOSE UNDER NO CIRCUMSTANCES SHALL HEAT TIMER CORPORATION ITS AUTH...

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