wirsbo ProMIX 101, A3091000, A3091250 Installation And Operating Instructions For The Installer
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
Installation and Operating Instructions
General Description
The ProMIX™ 101 Radiant Reset
Control provides closed loop control of
water in a secondary (radiant) loop of a
heating system, based on outdoor air
temperature and design temperature
settings. It also provides protection
against boiler condensation by monitoring and anticipating the boiler return
water temperature. This control is
designed specifically for radiant heating but is compatible with other types of
hydronic heat distribution systems
where the use of a weather responsive
control is desired.
Features
• Provides outdoor reset control using a 3-way proportional valve in familiar plumbing configurations.
• Eliminates the need to analyze and select complex reset ratios – just set the design temperatures.
• No guessing about current conditions – the outdoor and radiant loop temperatures are
displayed continuously, along with the secondary loop setpoint.
• Efficient use of boiler and circulator operation – only turned on to meet heating demands
• Helpful test mode for system setup and diagnostics.
1
Basic Operation
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
On installation, five design parameters must be
set:
• Outdoor Air Low - the anticipated coldest
outdoor design temperature. The same
figure used to calculate heat loss and
equipment loads.
• Outdoor Air High - The average room
setpoint temperature, for example 65°F.
This value will also serve as the warm
weather shutdown. Once outdoor temperature reaches the room setpoint
temperature, the heat loss is zero and the
control is deactivated.
• Primary Loop Low (minimum boiler return
water temperature) - Some types of
boilers require a minimum return water
temperature to protect the boiler from
condensing such as cast iron boilers. If
no boiler return protection is required, this
dial should be turned counter-clockwise
to the "Cold Start" setting.
• Secondary Loop High (maximum radiant
loop temperature) - the hottest water
temperature required to satisfy the radiant
panel at design conditions or coldest
outdoor temperature. Refer to OAL
• Secondary Loop Low (minimum radiant
loop temperature) - the minimum water
temperature required to meet the demands in the beginning and end of the
heating season.
The design temperatures are read from the
potentiometer dial settings when the system is
first started up, and may be displayed and
changed at anytime.
Three sensors are continuously monitored and
displayed: Outdoor Air (OA), Primary Loop
(PL), and Secondary Loop (SL). Also displayed is the optimum Secondary Loop Setpoint
(SLS), calculated based on the design settings
and the current OA temperature. (The colder it
is outside, the warmer the desired water temperature.)
2
The SL sensor provides feedback for the
control loop. To provide the proper temperature
in the radiant loop, the control positions the
valve using a proportional-integral algorithm. If
the PL sensor indicates a possibility of the
return temperature falling below the selected
minimum, the opening of the valve is reversed
to prevent condensation of the flue gases, and
the boiler is turned on (if not already running) to
raise the primary loop temperature.
The heat demand LED light when any of the
heating zones calls for heat. Then the “Heat
Demand” input causes the control to turn on the
secondary circulator and the Circ. LED. The
boiler and its LED are not turned on until the
valve reaches 50% open. When the SL temperature is high enough to allow the modulation
valve to close down to 10% open, the boiler
output is turned off. The control will keep the
boiler running for at least five minutes before the
boiler shuts off.
When the OA temperature reaches the room
setpoint temperature or warm weather shutdown setting, the control will close the proportional valve, turn off the circulator and the boiler,
and turn on the warm weather shut down LED.
At anytime during setup or operation, an error
caused by a faulty sensor will be indicated on
the display by the sensor name (OA/PL/SL),
“Err”, and whether the sensor is open (Opn) or
shorted (Sht). The test mode allows the inputs
and outputs to be checked for proper operation.
Temperature Setting Guidelines
OAL: The outside design temperature should
be set according to the standard design
temperature for the geographic area.
OAH: The warm weather shutdown tempera-
ture should be set to the average thermostat setpoint temperature. This will
also be the outdoor temperature at
which no heat is desired.
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
PLL: The minimum boiler return temperature
should be set according to the boiler
specifications. For cold start boilers, or
to disable boiler protection, set PLL to
“Cold Start”.
SLH: The maximum radiant loop temperature
should be set to the water temperature
needed when it is the coldest outside (at
design temperature). This information is
available through heat loss calculations
using Wirsbo Radiant Express or the
Zone Controls
For stable, even heating, use electronic thermostats (such as the DT10) with small differentials
(1°F) to provide close room temperature control.
water temperature table in the Wirsbo
Complete Design Assistance Manual.
SLH setting should never exceed the
recommended water temperatures for
the method in which the tubing is
installed.
SLL: The minimum radiant loop temperature
should be set to the water temperature
desired when the outdoor temperature is
near the warm weather shutdown point.
A typical setting is 80°F.
Important: Anticipating thermostats (such as
the T86H and the Honeywell T87F) are not
compatible with the Wirsbo ProMIX™ 101. The
ProMIX™ control can be wired in conjunction
with the Wirsbo Zone Control Module, or a
single thermostat (DT10).
3
Installation
1. Mount the control on a wall near the
modulating valve.
2. The outdoor air sensor should be mounted
in a shady location, preferably on the
north side of the building under the eaves
or a window sill. Drill a ¹⁄₄" hole through
the wall and caulk the sensor in place so it
is not in contact with the wall.
3. The primary loop (or boiler return) sensor
and the secondary (or radiant) supply
sensor should be installed in wells if
possible. If installed in wells, a heat
conductive paste should be used to
eliminate the air space with in the well, to
improve thermal transfer to the sensor. If
wells are not used, tape the sensor securely to a metal pipe using aluminum
tape. Cover with at least 1" thick insulation, extending 2" beyond each end of the
sensor. Any additional wiring required to
connect a sensor to the ProMIX™ control
panel should be run with 18-22 AWG wire.
4. Wire the control as indicated by the terminal block labels or by the wiring schematic
provided in Section 6. Be sure to provide
an earth ground to the case.
5. The ProMIX™ 101 Controller comes with
adjustable jumper settings set to operate
in Fahrenheit temperature, direct acting
and 0 - 10v modes. If settings are required
other than the preset values, move the
jumper (s) to the proper position. See
chart below.
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
6. Set the design temperature knobs to the
appropriate temperatures. The temperature setting can be fine tuned in the Power
Up/Setup Display Sequence.
7. Turn on the 120VAC supply.
8. Hold the Display Button and press the
Test/Reset button to enter the test mode.
9. Press the Display button repeatedly to test
the inputs and outputs, and to fine-tune
the temperature setting inputted in step 6.
10. Install the cover.
NOTE: Make sure sensor wires are routed
away from motors, relays and other high voltage
wiring in order to avoid erratic temperature
readings due to noisy electronic environments.
Attach the shields to the grounded case using
the mounting screw near the sensor terminals.
4
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
Power-up/Setup Display Sequence
This mode is entered on power-up or any time the Display or Reset Button is pressed while running. On power-up or reset, the settings scroll through automatically. To scroll manually, press the
Display button once. Then press it after each setting has been reviewed. If the display button is not
pressed for 60 seconds, the control will revert to scrolling automatically. All of the settings may be
adjusted while displayed.
Temperature Scale
(jumper-selectable)
Control Signal Output
(jumper-selectable)
Valve Action
(jumper-selectable)
Outdoor Air Low (Outdoor Design
Temperature) (potentiometer adjustable)
Outdoor Air High (Warm Weather Shutdown)
(potentiometer adjustable)
Primary Loop High (Minimum Return
Temperature) (potentiometer adjustable)
Secondary Loop High (Max. Radiant Loop
Temp.) (potentiometer adjustable)
Secondary Loop Low (Min. Radiant Loop
Temp.) (potentiometer adjustable)
Outdoor Air Temperature (Current Outdoor
Temp.) (sensor input)
t °F
°C
Out 0.10
4.20
Act dA
rA
OAL -60..41
-51..5
OAH 40..70
4..21
PLL 60..150
15..65
SLH 85..200
29..93
SLL 65..110
18..43
OA -60..122
-51..50
Err..OPn
Err..Sht
Fahrenheit
Celsius
0-10VDC
4-20mADC
Direct Acting closed at 0V, open at 10V)
Reverse Acting (closed at 10V, open at 0V)
°F range
°C range
°F range (must be ≥OAL+20)
°C range (must be ≥OAL+11)
°F range
°C range
°F range
°C range
°F range (must be ≤SLH-20)
°C range (must be ≤SLH-11)
°F range
°C range
Open sensor error
Shorted sensor error
Primary Loop Temperature (Current Return
Temp.) (sensor input)
Secondary Loop Temperature (Current Radiant
Temp.) (sensor input)
Continue in run mode
(if scrolling manually, press Display button to
continue)
Brief delay between modes
PL 32..221
0..105
Err...OPn
Err...Sht
SL 32..221
0..105
Err...OPn
Err...Sht
run
...
°F range
°C range
Open sensor error
Shorted sensor error
°F range
°C range
Open sensor error
Shorted sensor error
5
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
Run Mode Display Sequence
This mode is entered automatically after the power-up/setup sequence. It continuously loops until a
button is pressed or power is lost.
Important: Any changes or adjustments made to the temperature or jumper settings are ignored
until the test/reset or display button is pressed.
Outdoor Air Temperature (Current Outdoor T emp.)
(sensor input)
Primary Loop Temperature (Current Return T emp.)
(sensor input)
(A flashing L appears after PL indicating Low return
temperature and boiler protection active)
Secondary Loop Setpoint (Calculated Radiant
Setpoint)
Secondary Loop Temperature (Current Radiant
Temperature) (sensor input)
LOW AC condition (24AC supply < 20.0 VAC)
OA -60..122
-51..50
Err..OPn
Err..Sht
PL 32..221
0..105
Err...OPn
Err...Sht
SLS 65..110
18..93
SL 32..221
0..105
Err...OPn
Err...Sht
LO...AC... 15.0..19.9
°F range
°C range
Open sensor error
Shorted sensor erro
°F range
°C range
Open sensor error
Shorted sensor errore
°F range (SLL≤SLS≤SLH)
°C range (SLL≤SLS≤SLH)
°F range
°C range
Open sensor error
Shorted sensor error
Circulator & boiler off, valve closed.
(blank if below 15.0 VAC
Test Mode Display Sequence
This mode is accessed by holding the display button and pressing the Test/Reset button. The
sequence must be advanced manually by pressing the Display button after each step until the
setup mode is reached.
Display Test
24VAC Supply Voltage Test
Heat Demand (thermostat) Input Test
The thermostat or end switch may be cycled
to verify proper operation
Circulator Output Test
Boiler Output Test
Warm Weather Shutdown (Outdoor Air Cutoff)
LED Test
DC Output (Valve Control) Test
Continue in setup mode
6
8.8.8
AC 15.0..30.0
ES off
on
crc on
blr on
OAC on
dc 0..10.0
t
Open contact, Heat Demand LED off
Closed contact, Heat DemandLED on
Relay, circulator, and Circ. LED on
Relay, boiler, and Boiler LED on
Relay, boiler, and WWSD LED on
DC output ramps from 0-10V repeatedly
See Power-up/Setup Display Sequence
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
B
A
Typical Piping Arrangement using the Wirsbo ProMIX™ 101 Controller
7
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
Typical wiring using the ProMIX™ 101 Controller and a Wirsbo DT10 Thermostat
Typical wiring using the ProMIX™ 101 Controller, Wirsbo Zone Control Module
and a Single Pump Relay to provide Domestic Hot Water Priority
8
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
Typical wiring using the ProMIX™ 101 Controller with Wirsbo Zone Control Module
9
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
Typical wiring using the ProMIX™ Controller,
Wirsbo Zone Control Module and Multiple Pump Relay.
10
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
Fine Tuning
1. If heating is inadequate at relatively warm
outdoor temperatures (below OAH),
increase the minimum loop temperature
(SLL) by 5°-10°F.
2. If heat output is excessive at relatively
warm outdoor temperatures (below OAH),
decrease the minimum loop temperature
(SLL) by 5°-10°F. This condition may
signal faulty room temperature control
devices (i.e. thermostats).
3. If heating is inadequate at relatively cold
outdoor temperatures (above OAL), raise
the outdoor temperature (OAL) by
5°-10°F. If the outdoor temperature is
NOTE: Changes to the temperature settings are read only while displayed, after a reset or a
power loss.
Important: Any changes or adjustments made to the temperature or jumper settings are ignored
until the test/reset or display button is pressed.
below OAL, the SL temperature should be
at its maximum. SLH should not be
increased above the maximum temperature limitation for the installation method.
4. If the heat output is excessive at moderately cold outdoor temperatures (well
above the OAL), decrease the outdoor
design temperature (OAL) by 5°-10°F. If
the outdoor temperature is at or below the
OAL, SLH may be decreased by 5°-10°F.
Excessive heat output may signal that
maintenance is required for the manifold
supplying the area that is over heating.
11
A3091000/A3091250
ProMIX™ 101 Radiant
Heating Reset Control
Specifications
External Power Supply` 120 VAC +10%, -15%, 50/60
circuit Hz, 15A branch
Fuse 250V 15A slow blow, such as
Buss MDA15
Internal Transformer 24 VAC. 25 VA
not available for external
loads except as specified
Outputs
1. Proportional Valve Supply: 24 VAC, 10 VA
Control: 0-10 VDC into 500Ω
minimum direct or reverse
acting
4-20 mA into 300Ω maxi
mum direct or reverse acting
2. Secondary Circulator N.O. relay contact (switched
line)
12-22 AWG copper wire only
¹⁄₄ HP @ 120 VAC
Full Load: 7.4 A
Locked Rotor: 43.2 A
Resistive: 10 A
3. Boiler Control Signal N.O. relay contract (dry
contacts) limited to 18-22
AWG copper wire (24VAC
recommended)
¹⁄₄ HP @ 120 VAC
Full Load: 7.4 A
Locked Rotor: 43.2 A
Resistive: 10 A
Inputs:
1. Heat Demand Contact closure (24VAC
supplied)
2. Temperature Sensors 10k thermistors, -60° to 220°F,
-51° to 104°C (supplied)
Environmental:
1. Operating Temperature 40° to 104°F (4° to 40°C
2. Shipping/Storage Temp. -20° to 140°F (-29° to 60°C)
3. Moisture 95% RH non-condensing
4. Mounting Location Solid wall, away from heat
source and direct sun
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