AccuFlex VRF Application Training May 2015
Pre Design Checklist Accurate Room/Zone Load Calculation Building Blueprint or Drawing with Scale Jobsite Voltage Load Calculations Block Load Method Room/Zone Load Method Peak Zone Load Method 1
Block Load Room/Zone Load Front Offices 8Tons West Office 4Tons East Office 4Tons Block load = Room/Zone Load 4 Tons 4 Tons 4 Tons 4 Tons Mini Split Application 2
Peak Room/Zone Load West Office 4 Tons East Office 2Tons West Office 2 Tons East Office 4 Tons East Office Peak Zone Load = 4 Tons West Office Peak Zone Load = 4 Tons Highest Block Load = 6 Tons 4Tons 4Tons Combination Ratio (Indoor / Outdoor) 8 Tons 6 Tons = 1.33 6 Tons AccuFlex VRF Application 3
Peak Zone Load regardless of the time of day 240,117 Btu/h Highest Block Load occurring at hour 17 236,067 Btu/h 224987 1080 Size the indoor units to each peak zone load Total Peak Zone Load Highest Block Load = Combination Ratio 240,117 236,067 = 1.02 Cooling Combination Ratio Size the outdoor unit to the highest block load 4
Blueprints & Drawings Elevation Drawings Floor Plans VRF Training Example 1 5
Click Sales to begin Always download all available Updates Click New to start the design 6
Enter the project name Enter the customer s information Enter your information as the designer Select the design state then the city Double click in a cell to change it Click OK 3 Add Indoor Units 2 Add Rooms & Loads 4 Add Indoor Accessories 5 Add Outdoor Units 1 Add Floors to Building 6 Locate Units In Building 7
1 Add Floors to Building Click Edit Note each column s heading when entering new floors Additional floors are entered at the bottom of each column 8
Ceiling Height Floor Height Press TAB twice then enter the floor height. Click the blank cell at the bottom of the column and enter the quantity of floors in the Building Press ENTER Press TAB then enter the ceiling height. Note the total number of floors have been added Click any cell to change the data When warned, click OK to confirm the need to redo all outdoor unit checks 9
To delete a floor, click to the the left of the floor on the arrow then press DELETE After all floors are added or edited, click Done To add a basement, enter 1 in the floor cell, press TAB to enter the heights, then press ENTER 2 Add Rooms & Loads 10
Double click the blank cell under Name then enter the first room (zone) name Press TAB then enter the total cooling load Press TAB then enter the total heating load Press TAB then enter the sensible cooling load Double click the next blank cell in the room column to enter the next room Enter all of the remaining rooms and loads in the building 11
Double Click column line to see entire column content To delete a room, select the name then press DELETE Click Yes to confirm deleting the room 3 Add Indoor Units 12
VRF Training Example 1 To start the process of selecting the indoor units, select the first room name 13
The different styles of indoor units are listed in the top section The available sizes of the style selected above are listed below Qty indicates the quantity of this model that are needed to satisfy the loads Click the style of indoor unit you want for the room Click the size of indoor unit with the quantity needed for the room Click Add If you select a model with a Qty of 2, then 2 units will be added to the room To manually change the quantity, click the default number, then press BACKSPACE and then enter the new quantity 14
A yellow checkmark indicates an accessory has automatically been added, in this case a cassette 4 way panel The indoor unit is now shown with the room Click the style of indoor unit Click the size & quantity of unit Click the next room Click Add 15
Click the style of indoor unit Click the size & quantity of unit Click the next room Click Add Click the style of indoor unit Click the size of unit with a quantity of 2 Click the next room Click Add 16
Note that 2 units were added to the room Click the style of indoor unit Click the next room 17
For high wall indoor units, there appears to be 2 of each size Pause the mouse over the unit to see the entire model number Models ending in B need an external EEV. Models ending in C come with a factory installed EEV High Wall style has been selected Click the size of unit, with factory installed EEV and with a quantity of 2 Click Add 18
You will need to manually confirm that units added without load information satisfy the required capacities Indoor units can be added without room or load information To delete an indoor unit, click the Model Name then press DELETE Click Yes to confirm deleting the unit 19
Then click the indoor unit To see the specifications of an indoor unit, click Property tab To see all the indoor unit information click Auto Hide Click the Building Management tab to return to the building 20
You can also Auto Hide the Add ID Units section Click any tab to see the information again Click Auto Hide to unhide the section 21
4 Add Indoor Accessories VRF Training Example 1 22
The yellow checkmarks indicate some accessories were automatically selected Select the unit you want to add accessories to manually Click the boxes to add accessories Double Click column line to see entire column content or click, hold and drag column line to move it Click the Accessory tab 23
Note Auto Hide applied Click the boxes for the accessories Add all of the additional accessories Click the next unit No controller was needed for second indoor unit in these rooms 24
5 Select Outdoor Units Note Auto Hide applied Note Auto Hide was turned off 25
Click the first unit to be connected to the outdoor unit Press and hold CTRL then click the other indoor units connected to the outdoor unit Pressing SHIFT in place of CTRL will select all units up to the second selection Drag the group down to the Outdoor List and release the mouse button Once all the indoor units are selected, click the group and hold 26
Select VRF for 3 Phase units or Mini VRF for 1 Phase units For 3 Phase units only, select Heat Recovery or Heat Pump Change the outdoor unit name Set the Combination Ratio to match your design 27
Size the indoor units to each peak zone load Non Hourly Zone Load Calculation Zone Load = Block Load Combination Ratio = 1.00 Size the outdoor unit to the highest block load Click the outdoor model for the project To remove an indoor unit from this system, click the model then the minus sign Click OK 28
A green checkmark indicates the indoor unit is attached to the outdoor unit The outdoor unit is now shown To delete an outdoor unit, click the Model Name then press DELETE Click Yes to confirm deleting the unit 29
6 Locate Units In Building Click a room and hold Drag the room over to the floor where the unit it located and release the mouse button 30
Also, the room and unit now appear on the floor Note the room and unit are blue indicating they are located in the building Continue locating the rooms and units in the building Never drag just the unit to the floor, always drag the room Drag the outdoor unit over to the roof or floor where the unit it located Click the outdoor unit and hold 31
A green checkmark means the piping for the system can now be designed Note the outdoor unit now appears Select the Piping tab to begin laying out the refrigerant piping Note that Auto is checked Auto will create a piping system automatically for heat pump systems 32
VRF Training Example 1 Check Manual to lay out the piping according to the project Select and drag a Branch Joint or Header to the empty box Empty boxes indicate a component can be located here 33
Magnifying glass features are also available Use the mouse s thumbwheel to increase or decrease the drawing Size Press & hold the mouse s thumbwheel to move the drawing around the page Select the indoor unit for this location Right click in the empty box to see the available indoor units 34
Note that the unit now appears on the diagram Select additional components until all the indoor units are in place When designing a Heat Recovery system, a Mode Change Unit (MCU) will be available to select When designing a Heat Recovery system, a Mode Change Unit (MCU) will be available to select 35
Click and hold the left border then drag it to enlarge the section To see the specifications of any unit, click the unit 36
Right click on a component to remove it from the drawing Click the Actual Piping Length box and enter the length Click the No. of Elbows box and enter the quantity Click a section of pipe which then turns red Actual Length/Equivalent Length/Elbows ( Equivalent Length & Pipe Size calculated during System Check 37
After all lengths and elbows are entered, click System Check to check the piping Click each section of pipe and enter the length and elbows Review all of the system piping checks. Double click or drag the column line to expand it Note the additional refrigerant charge 38
An [ERROR] System check failure warning appears if the piping is incorrect Click the to return to the piping diagram Review the ERROR that must be corrected 39
After all corrections are made, click System Check to recheck the piping After confirming a successful system check, click Capacity Correction 40
Note the outdoor unit Simulated Capacity Note the indoor unit Simulated Capacity Click Capacity Correction Select OK Click the Indoor Unit tab to review the simulated capacities 41
Note Auto Hide applied Note Auto Hide applied You may need to modify the indoor unit size if the simulated capacity does not satisfy the room Load Click the style of the unit Click the size of the unit Click the Model Name of the unit you want to modify Click Modify 42
If you forget to reselect Heat Pump you will have to redo the piping layout Since the system capacity has changed, reselect the outdoor unit that meets the new load Click OK Click Piping to rerun System Check Note new indoor unit size 43
Click System Check to recheck the piping To print the piping diagram, click Print After confirming a successful system check, click Capacity Correction 44
Note the updated outdoor unit Simulated Capacity Note the updated indoor unit Simulated Capacity Click Capacity Correction Select OK Confirm the updated simulated capacities satisfy the room loads 45
Click the Wiring tab to view a simple system wiring diagram Note the amp draw and circuit protection is listed for each circuit The amp draw of the field installed electric heat option in 4TVM air handlers are not included Click the Breaker Name or Breaker Size box to edit the information Click a fuse or breaker 46
Click an indoor unit to view the specifications or edit the addressing Click the TEXT box to add text to indoor units or MCUs Click the Controller tab Click an empty box to view optional components Although outdoor units have a terminal block, click to add one with all central controllers 47
Click a central controller to add it to the system Click the yellow dot to connect a controller to the R1/R2 control layer Note the yellow dot turns red indicating a pending connection Right click on a component to remove or move it 48
Click System Check to check the control system Any controller errors will appear at the bottom Click OK Select any tab to review or update the design 49
When the design is complete, click Save As Save the project file to your choice of location Click Report to save a complete project report Rename the report to match the project, then click Save 50
Refrigerant Concentration Limit (RCL) 26 lbs./1,000 ft 3 0.026 lbs./ft 3 51
Refrigerant Concentration Limit (RCL) 26 lbs./1,000 ft 3 0.026 lbs./ft 3 Total System Charge = 39.308 lbs. 39.308 0.026 = 1512 ft 3 minimum volume 1512 ft 3 x 12 ft. = 126 ft 2 minimum square feet Smallest Room = 120 ft 2 Solutions? Possibly louvers, transfer grilles, undercut doors need engineer/inspector approval 2 Smaller Systems in Place of 1 Thank You for Attending American Standard AccuFlex Application Training 52
AccuFlex VRF Massachusetts Default Design Conditions \
New Hampshire Default Design Conditions Rhode Island Default Design Conditions