CONTROL FUNCTION
OVERVIEW - SECTION D
MIXING ZONES
The SYSTEMpro 311 can provide a reset supply water
temperature from the primary boiler loop to a secondary
mixed loop via a variable speed injection mixing or a floating
action valve. The mixing supply temperature is determined
using a reset ratio. In order for the control to set up a reset
ratio, the following information must be entered into the
Adjust Menu.
OUTDOOR DESIGN (OUT DSGN)
(See fig. a)
• OUT DSGN is the outdoor air temperature used when doing
heat-loss calculations for the building
MIXING DESIGN (MIX DSGN)
(See fig. b)
• MIX DSGN temperature is the supply water temperature
required to heat mixing zones when the outdoor
temperature is at OUT DSGN temperature
MIXING MAXIMUM (MIX MAX)
(See fig. c)
• MIX MAX sets highest water temperature control is allowed
to use as MIX TRG temperature
• If control calculates target MIX MAX setting, and MIX SUP
temperature is near MIX MAX temperature, the LCD's
Maximum pointer turns on while either the MIX TRG
temperature or the MIX SUP temperature is viewed
WARM WEATHER SHUT DOWN (WWSD)
(See fig. d)
• When outdoor air temperature rises above WWSD setting,
the SYSTEMpro 311 goes into WWSD and turns on the LCD's
WWSD pointer
• When control is in WWSD, Mix Demand and Boiler Demand
pointers are displayed if there is a demand
NOTE:
The control does not operate the heating
system to satisfy Mix or Boiler demands. The control
will respond to a DHW demand and operates as
described in Section C.
Section D1: General
67
CONTROL FUNCTION
OVER
VIEW
CONTROL FUNCTION OVERVIEW - Section D - Mixing Zones
Adjust
o
F
a
Adjust
o
F
b
Adjust
o
F
c
Access Level
LTD
USER
INST
ADV
Access Level
LTD
USER
INST
ADV
Access Level
LTD
USER
INST
ADV
Adjust
o
F
d
Access Level
LTD
USER
INST
ADV
Mix MAX
Mix DSGN
OUT DSGN
WWSD
Mix ROOM
210
(99)
190
(88)
170
(77)
150
(66)
130
(54)
110
(43)
90
(32)
70
(21)
50
°
F
(10
°
C)
-20
(-29)
0
(-18)
20
(-7)
40
(5)
60
(16)
80
(27)
Outdoor Air Temperature
Su
pp
ly
W
a
ter T
e
m
p
er
atur
e
Mixing Reset
Ratio
Mix MIN
Mix INDR
Summary of Contents for SYSTEMpro 311
Page 1: ...SYSTEMpro 311 Installation Manual...
Page 90: ...88 APPENDIX II APPENDIX II SYSTEMpro 311 Menu Tree...
Page 91: ...89 APPENDIX II APPENDIX II SYSTEMpro 311 Menu Tree...
Page 92: ...90 APPENDIX III APPENDIX III Application Drawings...
Page 93: ...91 APPENDIX III APPENDIX III Application Drawings...
Page 94: ...92 APPENDIX III APPENDIX III Application Drawings...
Page 95: ...93 APPENDIX III APPENDIX III Application Drawings...
Page 96: ...94 APPENDIX III APPENDIX III Application Drawings...
Page 97: ...95 APPENDIX III APPENDIX III Application Drawings...
Page 98: ...96 APPENDIX III APPENDIX III Application Drawings...
Page 99: ...97 APPENDIX III APPENDIX III Application Drawings...
Page 106: ......
