OUTDOOR RESET
The calculated heat-loss of a building or space is based on the
percentage of the average coldest weather conditions the area
experiences over the heating season. If the heat demand is
analyzed as a percentage of the heating systems capacity, the
heating system operates at or near maximum capacity for
only a small portion of the heating season. If the water
temperature is controlled using a non-weather responsive
tempering device, the device will supply a fixed water
temperature that does not fluctuate with the demand for heat.
Resetting the supply water temperature allows the heating
system to adjust to the varying demand loads of the structure.
Less energy (lower water temperature) is required during the
spring and fall compared to the middle of winter. Resetting the
supply water temperature based on a relationship to outdoor
temperature, allows the controls to match the output of the
system to the actual load. Additionally, by supplying the
correct supply water temperature based on this relationship,
we will allow the radiant zones to remain open and run longer,
providing increases comfort and efficiency.
SETPOINT CONTROL
When the Outdoor Design (OUTDR DSGN) setting is set to
OFF, the proMIX 101 supplies a fixed supply water
temperature equal to the MIX TARGET setting. An outdoor
sensor is not required during this mode of operation.
FLOATING ACTION MIXING
A floating action mixing valve is used to transfer heat from a
primary, high temperature boiler loop to a secondary, low
temperature radiant heating loop. The floating action mixing
valve injects the desired volume of hot water to the low
temperature loop to blend with the cooler return water from
the secondary system to achieve the required supply water
temperature.
• The floating action mixing valve is connected to the R Opn,
R Cls & C terminals (9, 10 & 11) on the control
• The Wirsbo proMIX 101 has the ability to support either a
reset or a setpoint supply water temperature
• The control opens or closes the mixing valve based on the
distance between the current supply water temperature and
the target supply water temperature
34
CONTROL FUNCTION
OVER
VIEW
CONTROL FUNCTION OVERVIEW - Section A - General
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 INDR
Summary of Contents for proMIX 101
Page 1: ...proMIX 101 Installation Manual...
Page 4: ...2 INTRODUCTION INTRODUCTION Control Overview...
Page 46: ...44 APPENDIX I proMIX 101 Menu Tree APPENDIX I...
Page 47: ...45 APPENDIX I proMIX 101 Menu Tree APPENDIX I...
Page 48: ...46 APPENDIX II Application Drawings APPENDIX II...
Page 49: ...47 APPENDIX II Application Drawings APPENDIX II...
Page 50: ...48 APPENDIX II APPENDIX II Application Drawings...
Page 51: ...49 APPENDIX II APPENDIX II Application Drawings...
Page 55: ......
