updated references and comments, #2293 [ci skip]

lbl-srg · May 19, 2021 · bc425ed · bc425ed
1 parent dbfe293
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diff --git a/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Pumps/CondenserWater/Controller.mo b/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Pumps/CondenserWater/Controller.mo
@@ -71,7 +71,7 @@ block Controller "Condenser water pump controller"
     annotation (Placement(transformation(extent={{120,-20},{160,20}}),
       iconTransformation(extent={{100,-50},{140,-10}})));
   Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput yPumSpeChe
-    "Flag to indicate if pump speed achieve setpoint"
+    "Flag to indicate if pump speed achieves setpoint"
     annotation (Placement(transformation(extent={{120,-100},{160,-60}}),
       iconTransformation(extent={{100,-110},{140,-70}})));
   Buildings.Controls.OBC.CDL.Continuous.AddParameter addPar(
@@ -244,7 +244,7 @@ annotation (
 <p>
 Block that generates control signals for condenser water pumps control, 
 according to ASHRAE RP-1711 Advanced Sequences of Operation for HVAC Systems Phase II –
-Central Plants and Hydronic Systems (Draft on March 2020), 
+Central Plants and Hydronic Systems (Draft on March 23, 2020), 
 section 5.2.9 Condenser water pumps. 
 </p>
 <p>

diff --git a/...HRAE/PrimarySystem/ChillerPlant/Pumps/CondenserWater/Subsequences/EnableLead_dedicated.mo b/...HRAE/PrimarySystem/ChillerPlant/Pumps/CondenserWater/Subsequences/EnableLead_dedicated.mo
@@ -8,7 +8,7 @@ block EnableLead_dedicated
     "Threshold to check lead chiller OFF time";
 
   Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uLeaChiEna
-    "Lead chiller enabling status"
+    "Lead chiller commanded on status"
     annotation (Placement(transformation(extent={{-140,50},{-100,90}}),
       iconTransformation(extent={{-140,60},{-100,100}})));
   Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uLeaChiSta
@@ -35,9 +35,10 @@ protected
     annotation (Placement(transformation(extent={{60,60},{80,80}})));
   Buildings.Controls.OBC.CDL.Logical.Timer tim(
     final t=offTimThr)
-    "Check if the chiller has been OFF for more than threshold"
+    "Check if the chiller has been proven off for more than threshold time"
     annotation (Placement(transformation(extent={{-40,-30},{-20,-10}})));
-  Buildings.Controls.OBC.CDL.Logical.Not not3 "Logical not"
+  Buildings.Controls.OBC.CDL.Logical.Not not3
+    "Check if the lead chiller is disabled"
     annotation (Placement(transformation(extent={{-60,30},{-40,50}})));
   Buildings.Controls.OBC.CDL.Logical.And and2 "Logical and"
     annotation (Placement(transformation(extent={{0,30},{20,50}})));
@@ -108,14 +109,14 @@ annotation (
 Block that enable and disable lead condenser water pump, for plants
 with dedicated condenser water pumps,
 according to ASHRAE RP-1711 Advanced Sequences of Operation for HVAC Systems Phase II –
-Central Plants and Hydronic Systems (Draft on March 2020),
+Central Plants and Hydronic Systems (Draft on March 23, 2020),
 section 5.2.9 Condenser water pumps, part 5.2.9.4.
 </p>
 <p>
 The lead condenser water pump should be enabled when lead chiller is commanded
 to run (<code>uLeaChiEna</code> = true). It should be disabled when the lead
 chiller is disabled and either the lead chiller has been proven off
-(<code>uLeaChiSta</code> = false) for <code>offTimThr</code>, i.e. 3 minutes or
+(<code>uLeaChiSta</code> = false) for <code>offTimThr</code>, i.e. 3 minutes, or
 is not requesting condenser water flow (<code>uLeaConWatReq</code> = false).
 </p>
 </html>", revisions="<html>

diff --git a/...SHRAE/PrimarySystem/ChillerPlant/Pumps/CondenserWater/Subsequences/EnableLead_headered.mo b/...SHRAE/PrimarySystem/ChillerPlant/Pumps/CondenserWater/Subsequences/EnableLead_headered.mo
@@ -6,12 +6,11 @@ block EnableLead_headered
   parameter Integer nChi=2 "Total number of chiller";
 
   Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uWseConIsoVal if
-       have_WSE
-    "WSE condenser water isolation valve status"
+       have_WSE "WSE condenser water isolation valve commanded status"
     annotation (Placement(transformation(extent={{-140,-40},{-100,0}}),
       iconTransformation(extent={{-140,-60},{-100,-20}})));
   Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uChiConIsoVal[nChi]
-    "Chiller condenser water isolation valve status"
+    "Chiller condenser water isolation valve commanded status"
     annotation (Placement(transformation(extent={{-140,0},{-100,40}}),
       iconTransformation(extent={{-140,20},{-100,60}})));
   Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput yLea "Lead pump status"
@@ -94,7 +93,7 @@ annotation (
 Block that enable and disable lead condenser water pump, for plants
 with headered condenser water pumps, 
 according to ASHRAE RP-1711 Advanced Sequences of Operation for HVAC Systems Phase II –
-Central Plants and Hydronic Systems (Draft on March 2020), 
+Central Plants and Hydronic Systems (Draft on March 23, 2020), 
 section 5.2.9 Condenser water pumps, part 5.2.9.2-3.
 </p>
 <ol>

diff --git a/...Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Pumps/CondenserWater/Subsequences/Speed.mo b/...Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Pumps/CondenserWater/Subsequences/Speed.mo
@@ -5,7 +5,7 @@ block Speed
   parameter Boolean have_WSE = true
     "Flag to indicate if the plant has water side economizer";
   parameter Integer totSta = 6
-    "Total number of stages, including the stages with a WSE, if applicable";
+    "Total number of stages, including stage zero and the stages with a WSE, if applicable";
   parameter Real staVec[totSta] = {0, 0.5, 1, 1.5, 2, 2.5}
     "Chiller stage vector, element value like x.5 means chiller stage x plus WSE";
   parameter Real desConWatPumSpe[totSta] = {0, 0.5, 0.75, 0.6, 0.75, 0.9}
@@ -77,7 +77,8 @@ protected
   Buildings.Controls.OBC.CDL.Integers.MultiSum mulSumInt(
     final nin=totSta) "Current stage index"
     annotation (Placement(transformation(extent={{-60,-10},{-40,10}})));
-  Buildings.Controls.OBC.CDL.Continuous.Sources.Constant con4(final k=0) if not have_WSE
+  Buildings.Controls.OBC.CDL.Continuous.Sources.Constant con4(
+    final k=0) if not have_WSE
     "Constant zero"
     annotation (Placement(transformation(extent={{-120,-10},{-100,10}})));
 
@@ -160,7 +161,7 @@ annotation (
 Block that outputs number of operating condenser water pumps and design pump speed 
 for current stage, 
 according to ASHRAE RP-1711 Advanced Sequences of Operation for HVAC Systems Phase II –
-Central Plants and Hydronic Systems (Draft on March 2020), 
+Central Plants and Hydronic Systems (Draft on March 23, 2020), 
 section 5.2.9 Condenser water pumps, part 5.2.9.6. This sequence is for plants
 have variable speed condenser water pumps.
 </p>

diff --git a/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/SetPoints/ChilledWaterPlantReset.mo b/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/SetPoints/ChilledWaterPlantReset.mo
@@ -174,7 +174,7 @@ Documentation(info="<html>
 <p>
 Block that output chilled water plant reset <code>yChiWatPlaRes</code> according
 to ASHRAE RP-1711 Advanced Sequences of Operation for HVAC Systems Phase II –
-Central Plants and Hydronic Systems (Draft 6 on July 25, 2019), section 5.2.5.2.
+Central Plants and Hydronic Systems (Draft March 23, 2020), section 5.2.5.2.
 </p>
 <p>
 Following implementation is for plants with primary-only and primary-secondary

diff --git a/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/SetPoints/ChilledWaterSupply.mo b/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/SetPoints/ChilledWaterSupply.mo
@@ -16,7 +16,7 @@ block ChilledWaterSupply
     "Maximum chilled water pump differential static pressure";
   parameter Modelica.SIunits.ThermodynamicTemperature TChiWatSupMin(
     displayUnit="K")
-    "Minimum chilled water supply temperature";
+    "Minimum chilled water supply temperature. This is the lowest minimum chilled water supply temperature of chillers in the plant";
   parameter Modelica.SIunits.ThermodynamicTemperature TChiWatSupMax(
     final min=TChiWatSupMin,
     displayUnit="K") = 288.706
@@ -205,7 +205,7 @@ primary-secondary systems serving differential pressure controlled pumps.
 The outputs include supply temperature setpoint <code>TChiWatSupSet</code>
 and pump differential pressure setpoint <code>dpChiWatPumSet</code>, according
 to ASHRAE RP-1711 Advanced Sequences of Operation for HVAC Systems Phase II –
-Central Plants and Hydronic Systems (Draft 6 on July 25, 2019), section 5.2.5.2.
+Central Plants and Hydronic Systems (Draft March 23, 2020), section 5.2.5.2.
 </p>
 <p>
 Chilled water supply temperature setpoint <code>TChiWatSupSet</code> and pump

diff --git a/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Down.mo b/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Down.mo
@@ -796,7 +796,7 @@ water-cooled primary-only parallel chiller plants with headered chilled water pu
 and headered condenser water pumps, or air-cooled primary-only parallel chiller
 plants with headered chilled water pumps.
 This development is based on ASHRAE RP-1711 Advanced Sequences of Operation for
-HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft version, March 2020),
+HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft on March 23, 2020),
 section 5.2.4.17, which specifies the step-by-step control of
 devices during chiller staging down process.
 </p>

diff --git a/...ontrols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/CHWIsoVal.mo b/...ontrols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/CHWIsoVal.mo
@@ -15,7 +15,7 @@ block CHWIsoVal "Sequence of enable or disable chilled water isolation valve"
 
   Buildings.Controls.OBC.CDL.Interfaces.IntegerInput nexChaChi
     "Index of next chiller that should change status"
-    annotation (Placement(transformation(extent={{-200,-10},{-160,30}}),
+    annotation (Placement(transformation(extent={{-200,-20},{-160,20}}),
       iconTransformation(extent={{-140,60},{-100,100}})));
   Buildings.Controls.OBC.CDL.Interfaces.RealInput uChiWatIsoVal[nChi](
     final unit=fill("1", nChi),
@@ -90,13 +90,13 @@ protected
   Buildings.Controls.OBC.CDL.Logical.Switch swi1[nChi] "Logical switch"
     annotation (Placement(transformation(extent={{60,-70},{80,-50}})));
   Buildings.Controls.OBC.CDL.Logical.Switch swi2[nChi] "Logical switch"
-    annotation (Placement(transformation(extent={{60,0},{80,20}})));
+    annotation (Placement(transformation(extent={{60,-10},{80,10}})));
   Buildings.Controls.OBC.CDL.Integers.Equal intEqu[nChi]
     "Check next enabling isolation valve"
-    annotation (Placement(transformation(extent={{-20,0},{0,20}})));
+    annotation (Placement(transformation(extent={{-20,-10},{0,10}})));
   Buildings.Controls.OBC.CDL.Routing.IntegerReplicator intRep(final nout=nChi)
     "Replicate integer input"
-    annotation (Placement(transformation(extent={{-80,0},{-60,20}})));
+    annotation (Placement(transformation(extent={{-80,-10},{-60,10}})));
   Buildings.Controls.OBC.CDL.Routing.RealReplicator reaRep(final nout=nChi)
     "Replicate real input"
     annotation (Placement(transformation(extent={{80,70},{100,90}})));
@@ -126,7 +126,7 @@ protected
     annotation (Placement(transformation(extent={{140,130},{160,150}})));
   Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt[nChi](
     final k=chiInd) "Chiller index array"
-    annotation (Placement(transformation(extent={{-80,-30},{-60,-10}})));
+    annotation (Placement(transformation(extent={{-80,-40},{-60,-20}})));
 
 equation
   connect(uChiWatIsoVal, triSam.u)
@@ -188,24 +188,24 @@ equation
     annotation (Line(points={{-180,-100},{-140,-100},{-140,-52},{58,-52}},
       color={0,0,127}));
   connect(swi2.y, swi.u1)
-    annotation (Line(points={{82,10},{100,10},{100,-32},{118,-32}},
+    annotation (Line(points={{82,0},{100,0},{100,-32},{118,-32}},
       color={0,0,127}));
   connect(nexChaChi, intRep.u)
-    annotation (Line(points={{-180,10},{-82,10}}, color={255,127,0}));
+    annotation (Line(points={{-180,0},{-82,0}},   color={255,127,0}));
   connect(intRep.y, intEqu.u1)
-    annotation (Line(points={{-58,10},{-22,10}}, color={255,127,0}));
+    annotation (Line(points={{-58,0},{-22,0}},   color={255,127,0}));
   connect(intEqu.y, swi2.u2)
-    annotation (Line(points={{2,10},{58,10}}, color={255,0,255}));
+    annotation (Line(points={{2,0},{58,0}},   color={255,0,255}));
   connect(lin1.y, reaRep.u)
     annotation (Line(points={{62,80},{78,80}}, color={0,0,127}));
   connect(lat.y, tim.u)
     annotation (Line(points={{42,-170},{50,-170},{50,-220},{-120,-220},
       {-120,80},{-102,80}},  color={255,0,255}));
   connect(reaRep.y, swi2.u1)
-    annotation (Line(points={{102,80},{120,80},{120,50},{40,50},{40,18},{58,18}},
+    annotation (Line(points={{102,80},{120,80},{120,50},{40,50},{40,8},{58,8}},
       color={0,0,127}));
   connect(triSam.y, swi2.u3)
-    annotation (Line(points={{-58,-100},{40,-100},{40,2},{58,2}},
+    annotation (Line(points={{-58,-100},{40,-100},{40,-8},{58,-8}},
       color={0,0,127}));
   connect(uChiWatIsoVal, hys4.u)
     annotation (Line(points={{-180,-100},{-140,-100},{-140,160},{-122,160}},
@@ -241,7 +241,7 @@ equation
   connect(or2.y, mulAnd1.u)
     annotation (Line(points={{62,220},{78,220}}, color={255,0,255}));
   connect(conInt.y, intEqu.u2)
-    annotation (Line(points={{-58,-20},{-40,-20},{-40,2},{-22,2}},
+    annotation (Line(points={{-58,-30},{-40,-30},{-40,-8},{-22,-8}},
       color={255,127,0}));
   connect(uUpsDevSta, and5.u2)
     annotation (Line(points={{-180,-140},{-130,-140},{-130,140},{138,140}},
@@ -324,7 +324,7 @@ Block updates chiller chilled water isolation valve enabling-disabling status wh
 there is stage change command (<code>chaPro=true</code>). It will also generate 
 status to indicate if the valve reset process has finished.
 This development is based on ASHRAE RP-1711 Advanced Sequences of Operation for 
-HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft version, March 2020), 
+HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft on March 23, 2020), 
 section 5.2.4.16, item 5 and section 5.2.4.17, item 3, which specifies when 
 and how the isolation valve should be controlled when it is in stage changing process.
 </p>

diff --git a/...ls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/DisableChiller.mo b/...ls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/DisableChiller.mo
@@ -419,7 +419,7 @@ Documentation(info="<html>
 <p>
 Block that controlles chiller when there is staging down command <code>uStaDow=true</code>.
 This implementation is based on ASHRAE RP-1711 Advanced Sequences of Operation for HVAC Systems Phase II – 
-Central Plants and Hydronic Systems (Draft version, March 2020), section 5.2.4.17,
+Central Plants and Hydronic Systems (Draft on March 23, 2020), section 5.2.4.17,
 item 1.e and f. These two sections specify how to start the smaller chiller and shut
 off larger chiller when the stage change requires large chiller off and small chill on.
 In other stage change, when it does not require chiller on/off, the chiller will then

diff --git a/...ontrols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/DownStart.mo b/...ontrols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/DownStart.mo
@@ -91,7 +91,7 @@ block DownStart "Sequence for starting stage-down process"
     annotation (Placement(transformation(extent={{-200,30},{-160,70}}),
       iconTransformation(extent={{-140,-20},{-100,20}})));
   Buildings.Controls.OBC.CDL.Interfaces.BooleanInput uOnOff
-    "True: if the stage change require one chiller to be enabled while another is disabled"
+    "True: if the stage change require enabling one chiller and disable another one"
     annotation (Placement(transformation(extent={{-200,0},{-160,40}}),
       iconTransformation(extent={{-140,-40},{-100,0}})));
   Buildings.Controls.OBC.CDL.Interfaces.IntegerInput nexEnaChi
@@ -505,7 +505,7 @@ Documentation(info="<html>
 <p>
 Block that controls devices at the first step of chiller staging down process.
 This development is based on ASHRAE RP-1711 Advanced Sequences of Operation for
-HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft version, March 2020),
+HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft on March 23, 2020),
 section 5.2.4.17, item 1 and 2. The sections specifies the first step of
 staging down process.
 </p>

diff --git a/...ols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/EnableChiller.mo b/...ols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/EnableChiller.mo
@@ -372,7 +372,7 @@ Documentation(info="<html>
 Block that controlles chiller when there is staging up command <code>uStaUp=true</code>.
 
 This implementation is based on ASHRAE RP-1711 Advanced Sequences of Operation for HVAC Systems Phase II – 
-Central Plants and Hydronic Systems (Draft version, March 2020), section 5.2.4.16,
+Central Plants and Hydronic Systems (Draft on March 23, 2020), section 5.2.4.16,
 item 6 and item 7.a. These sections specify when the next chiller should be enabled
 and when the running smaller chiller should be diabled.
 </p>

diff --git a/...trols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/HeadControl.mo b/...trols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/HeadControl.mo
@@ -292,8 +292,7 @@ Block that generates chiller head pressure control enabling status array when
 there is stage change command (<code>chaPro=true</code>). It also generates status 
 to indicate if the head pressure control status change process has finished.
 This development is based on ASHRAE RP-1711 Advanced Sequences of Operation for 
-HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft version,
-March 2020):
+HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft on March 23, 2020):
 </p>
 <p>
 In stage-up process, section 5.2.4.16, item 4: 

diff --git a/...rols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/ReduceDemand.mo b/...rols/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/ReduceDemand.mo
@@ -293,7 +293,7 @@ annotation (
 <p>
 Block that reduces demand of current operating chillers when there is a stage-up
 command, according to ASHRAE RP-1711 Advanced Sequences of Operation for 
-HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft version, March 2020),
+HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft on March 23, 2020),
 section 5.2.4.16, item 1 which specifies how to start the stage-up
 process of the current operating chillers; and section 5.2.4.17, item 1.a which specifies
 how to start the stage-down process of the current operating chiller when the 

diff --git a/...ls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/ResetMinBypass.mo b/...ls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/ResetMinBypass.mo
@@ -184,8 +184,8 @@ annotation (
 Block that generates minimum bypass flow reset status when there is 
 stage-change command.
 This development is based on ASHRAE RP-1711 Advanced Sequences of Operation for 
-HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft version,
-March 2020), section 5.2.4.16, item 2.
+HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft on March 23, 2020),
+section 5.2.4.16, item 2.
 </p>
 <p>
 When there is stage-change command (<code>chaPro</code> = true) and the upstream

diff --git a/...gs/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/UpEnd.mo b/...gs/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Subsequences/UpEnd.mo
@@ -619,8 +619,8 @@ Documentation(info="<html>
 <p>
 Block that controls devices at the ending step of chiller staging up process.
 This development is based on ASHRAE RP-1711 Advanced Sequences of Operation for
-HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft version,
-March 2020), section 5.2.4.16, item 6 and 7. These sections specify the controls of
+HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft on March 23,
+2020), section 5.2.4.16, item 6 and 7. These sections specify the controls of
 devices at the ending step of staging up process.
 </p>
 <p>

diff --git a/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Up.mo b/Buildings/Controls/OBC/ASHRAE/PrimarySystem/ChillerPlant/Staging/Processes/Up.mo
@@ -693,7 +693,7 @@ water-cooled primary-only parallel chiller plants with headered chilled water pu
 and headered condenser water pumps, or air-cooled primary-only parallel chiller
 plants with headered chilled water pumps.
 This development is based on ASHRAE RP-1711 Advanced Sequences of Operation for
-HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft version, March 2020),
+HVAC Systems Phase II – Central Plants and Hydronic Systems (Draft on March 23, 2020),
 section 5.2.4.16, which specifies the step-by-step control of
 devices during chiller staging up process.
 </p>

diff --git a/...BC/ASHRAE/PrimarySystem/ChillerPlant/Towers/FanSpeed/ReturnWaterTemperature/Controller.mo b/...BC/ASHRAE/PrimarySystem/ChillerPlant/Towers/FanSpeed/ReturnWaterTemperature/Controller.mo
@@ -580,7 +580,7 @@ Documentation(info="<html>
 Block that outputs cooling tower fan speed <code>yFanSpe</code> for maintaining
 condenser water return temperature at setpoint. This is implemented
 according to ASHRAE RP-1711 Advanced Sequences of Operation for HVAC Systems Phase II –
-Central Plants and Hydronic Systems (Draft 6 on July 25, 2019), section 5.2.12.2,
+Central Plants and Hydronic Systems (Draft on March 23, 2020), section 5.2.12.2,
 item 2. It includes four subsequences:
 </p>
 <ul>

diff --git a/...PrimarySystem/ChillerPlant/Towers/FanSpeed/ReturnWaterTemperature/Subsequences/Coupled.mo b/...PrimarySystem/ChillerPlant/Towers/FanSpeed/ReturnWaterTemperature/Subsequences/Coupled.mo
@@ -1,4 +1,4 @@
-within Buildings.Controls.OBC.ASHRAE.PrimarySystem.ChillerPlant.Towers.FanSpeed.ReturnWaterTemperature.Subsequences;
+within Buildings.Controls.OBC.ASHRAE.PrimarySystem.ChillerPlant.Towers.FanSpeed.ReturnWaterTemperature.Subsequences;
 block Coupled
   "Sequence of defining cooling tower fan speed when the plant is close coupled"
 
@@ -75,6 +75,7 @@ block Coupled
     final Td=Td,
     final yMax=yMax,
     final yMin=yMin,
+    final reverseActing=false,
     final y_reset=yMin) "Condenser water return temperature controller"
     annotation (Placement(transformation(extent={{-80,70},{-60,90}})));
 

diff --git a/...arySystem/ChillerPlant/Towers/FanSpeed/ReturnWaterTemperature/Subsequences/LessCoupled.mo b/...arySystem/ChillerPlant/Towers/FanSpeed/ReturnWaterTemperature/Subsequences/LessCoupled.mo
@@ -1,4 +1,4 @@
-within Buildings.Controls.OBC.ASHRAE.PrimarySystem.ChillerPlant.Towers.FanSpeed.ReturnWaterTemperature.Subsequences;
+within Buildings.Controls.OBC.ASHRAE.PrimarySystem.ChillerPlant.Towers.FanSpeed.ReturnWaterTemperature.Subsequences;
 block LessCoupled
   "Sequence of defining cooling tower fan speed when the plant is not close coupled"
 
@@ -119,6 +119,7 @@ block LessCoupled
     final Td=TdSupCon,
     final yMax=ySupConMax,
     final yMin=ySupConMin,
+    final reverseActing=false,
     final y_reset=ySupConMin) "Condenser water supply temperature controller"
     annotation (Placement(transformation(extent={{-20,-40},{0,-20}})));
 
@@ -179,6 +180,7 @@ protected
     annotation (Placement(transformation(extent={{-20,40},{0,60}})));
   Buildings.Controls.OBC.CDL.Continuous.MultiMax multiMax(
     final nin=nChi)
+    "Difference of the design supply and return condenser water temperature of the enabled chiller"
     annotation (Placement(transformation(extent={{20,40},{40,60}})));
   Buildings.Controls.OBC.CDL.Logical.Timer tim(final t=iniPlaTim)
     "Count the time after plant being enabled"