HeatLink 31360 User manual

The
SystemHeatFloor
®
LinkHeat
Mixing Valve Reset Control
Stk# 31360
VIEW ADJUST
TARGET
INDR
DSGN DIFF
BOIL
MIX
OUTDR
ROOM WWSD
˚ F
˚ C
MAXMIN
OCC
UN
C US
158033
Made in Canada by
Power:
Floating Output:
Relays:
Demand:
120 V + 10% 50/60 Hz 1300 VA
24 V (ac) 0.34 A 8 VA
240 V (ac) 10 A 1/3 hp, pilot duty 240 VA
20 to 260 V (ac) 2 VA
Signal wiring must be
rated at least 300 V.
Test
Terminal
Unit
Boiler
9 10
R
Opn R
Cls
11
C
Powered Output
78
LNSys
Pmp N
1
Mixing
Demand
23456
Power
12 13 14 15 16 17
Do not apply power
UnO
Sw Com Boil Mix Com Out
Item
Motor
Speed Open Close Mixing Demand
Input
Timer
Optional
Output
Mixing Valve &
Actuating Motor
M
Boiler
Output
Boiler
Input
Universal Sensor
(included)
Mixing Valve Reset Control 31360
Floating Action
®
LinkHeat
Input
120 V (ac)
Power
Supply
Input
Mix Demand
signal
Output
Mixing System
Pump
Input
Indoor Sensor
Optional
(European version only)
Input
Outdoor Sensor
(included)
Input
Universal Sensor
(included)
L631360
May 16, 2008
North American version shown

HeatLink®Mixing Valve Reset Control Stk# 31360
®
LinkHeat
www.heatlinkgroup.com
HeatLink
2
Introduction
Table of Contents:
Table of Contents / Introduction..................................................................................................................... Pg. 2
User Interface ................................................................................................................................................. Pg. 3-4
General Operation .......................................................................................................................................... Pg. 4-5
Mixing Operation (North American version)................................................................................................. Pg. 6-7
Mixing Operation (European version) ........................................................................................................... Pg. 8-10
Boiler Operation (North American version)................................................................................................... Pg. 11
Boiler Operation (European version) ............................................................................................................. Pg. 12
Installation
Step 1 - Materials .................................................................................................................................... Pg. 13
Step Two - Mounting the Base................................................................................................................ Pg. 13
Step Three - Rough-in Wiring................................................................................................................. Pg. 13
Step Four - Electrical Connections to the Control .................................................................................. Pg. 13-15
Step Five - Testing the Wiring................................................................................................................. Pg. 15-16
Quick Setup .................................................................................................................................................... Pg. 17-18
View Menu ..................................................................................................................................................... Pg. 19
Adjust Menu .................................................................................................................................................. Pg. 20-21
Testing & Troubleshooting............................................................................................................................. Pg. 21-22
Error Messages............................................................................................................................................... Pg. 23
Technical & Electrical Information
TECH 5.1: 1 Circuit (Fully Modulating Floor Heating) ....................................................................... Pg. 24
ELECT 5.1: 1 Circuit (Fully Modulating Floor Heating) .................................................................... Pg. 25
TECH 5.2: 2 Circuit (Fully Modulating Fl. Ht. plus indirect Fired Storage Tank)................................. Pg. 26
ELECT 5.2: Indoor/Outdoor controller c/w Optional Standard Thermostats......................................... Pg. 27
TECH 5.3: 3 Circuit (Modulating Floor Heating plus High Temp. Circuits) ......................................... Pg. 28
ELECT 5.3: StatLink®Controls Activating Low & High Temp. Circuits .............................................. Pg. 30-31
TECH 5.4: 6 Circuit (Mod. Fl. Ht. & SnowMelt plus Additional Htg. Components) ............................ Pg. 32
ELECT 5.4: StatLink®Controls Activating Circuits plus SnowMelt. Controller................................... Pg. 34-35
TECH 5.5: 4 Circuit (Mod. Fl. Ht. plus Fan Coil, IFHWH & Secondary Ht. Exchanger)..................... Pg. 36
ELECT 5.5: StatLink®Activating Low Temp. plus Independent High Temp. Circuits.......................... Pg. 38-39
TECH 5.6: Multiple Low Temperature Circuits ..................................................................................... Pg. 40
ELECT 5.6: Indoor/Outdoor Controller c/w Multiple Standard Room Thermostats ............................. Pg. 41
Technical Data................................................................................................................................................ Pg. 44
Warranty ......................................................................................................................................................... Pg. 44
The HeatLink®Mixing Valve Reset Control Stk# 31360 is designed to control the supply water temperature to a hydronic system in order to provide
outdoor reset or setpoint operation. The control uses a floating action mixing valve to regulate the supply water temperature, while protecting the
boiler against flue gas condensation. The control has a Liquid Crystal Display (LCD) to view system status and operating information.
Additional functions include:
• User comfort adjustment to increase or decrease building space temperature
• Powered mixing system pump output
• Test sequence to ensure proper component operation
• Setback input for energy savings
• North American version
• 120 V (ac) power supply
• CSA C US certied (approved to applicable UL standards)
• European version
• 230 V (ac) power supply
• Advanced settings to ne-tune building requirements
• Boiler Control for improved energy savings
• Quick Setup for easy installation and programming of control
• Optional indoor sensor for room air temperature control
• CE approved
Introduction

HeatLink®Mixing Valve Reset Control Stk# 31360
HeatLink
®
LinkHeat
3
www.heatlinkgroup.com
User Interface
The HeatLink®Mixing Valve Reset Control Stk# 31360 uses a Liquid Crystal Display (LCD) as the method of supplying information. You use
the LCD in order to set up and monitor the operation of your system. The Stk# 31360 has three push buttons (Item, “Up”, “Down”) for selecting,
viewing, and adjusting settings. As you program your control, record your settings in the ADJUST menu table which is found in the second half
of this brochure.
Item
• The abbreviated name of the selected item will be displayed in the item eld of the display. To view the next
available item, press and release the Item button. Once you have reached the last available item, pressing and
releasing the Item button will return the display to the rst item.
Item
Adjust
• To make an adjustment to a setting in the control, press and hold simultaneously for 1 second, the Item, “Up”
and “Down” buttons. The display will then show the word ADJUST in the top right corner. Then select the
desired item using the Item button. Finally, use the “Up” and / or “Down” button to make the adjustment.
• To exit the ADJUST menu, either select the ESC item and press the “Up” or “Down” button, or leave the
adjustment buttons alone for 20 seconds.
• When the Item button is pressed and held in the VIEW menu, the display scrolls through all the adjust items in both access levels.
• Additional information can be gained by observing the status eld and pointers of the LCD. The status eld will indicate which of the control’s
outputs are currently active. Most symbols in the status eld are only visible when the VIEW menu is selected.
Item
Number Field
Displays the current value
of the selected item
Menu Field
Displays the
current menu
Buttons
Selects Menus, Items and
adjusts settings
Item
{
Terminal Unit
VIEW ADJUST
TARGET
INDR
DSGN DIFF
BOIL
MIX
OUTDR
ROOM WWSD
˚ F
˚ C
MAXMIN
OCC
UN
Motor Speed Open Close Mixing Demand
Item Field
Displays an abbreviated
name of the selected item
Status Field
Displays the current status of
the control’s inputs, outputs and
operation
User Interface
North American & European Versions

HeatLink®Mixing Valve Reset Control Stk# 31360
®
LinkHeat
www.heatlinkgroup.com
HeatLink
4
Symbol Description
User Interface / General Operation
General Operation
Pump
Displays when the mixing system pump is in
operation.
Burner
Displays when the boiler relay is turned on.
Occupied Schedule
Displays when the control is in occupied (Day)
mode.
Unoccupied Schedule
Displays when the control is in unoccupied (Night)
mode.
UNOCC
°F, °C
Displays the unit of measure that all of the
temperatures are to be displayed in the control.
Pointer
Displays the control operation as indicated by
the text.
OCC
˚ F, ˚ C
Powering Up The Control
When the HeatLink®Mixing Valve Reset Control Stk# 31360 is powered up, the control displays the control type number in the LCD for 2 seconds.
Next, the software version is displayed for 2 seconds. Finally, the control enters into the normal operating mode.
Operation
The Stk# 31360 uses a floating action mixing valve to vary the supply water temperature to a hydronic system. The supply water temperature is
based on either the current outdoor temperature, or a xed setpoint.
Outdoor Reset (North American version)
The amount of heat lost by a building changes depending on the outdoor air temperature. The
amount of heat supplied by the heating system must be equal to the amount of heat being lost
in the building. If the amount of heat supplied is not equal, the building will either overheat
or cool off.
When the Outdoor Design setting is set to a temperature, the control calculates a mix supply
temperature based on the outdoor air temperature and the programmed reset ratio.
Setpoint Control
When the outdoor design (OUTDR DSGN) setting is set to OFF, the Stk# 31360 supplies a xed mixing supply temperature equal to the MIX
TARGET setting. An outdoor sensor is not required during this mode of operation.
Outdoor Design
Increasing Water Temperature
Design Supply
Decreasing Outdoor Te mperature
Terminal Unit
Indoor Design
European Version
North American & European Versions (differences where noted)
Starting
Point
(Fixed)
Mix Design
Outdoor Design
Decreasing Air Temperature
Increasing Water Temperature
North American Version
Outdoor Reset (European version)
When the outdoor design (OUTDR DSGN) setting is not set to OFF, the Stk# 31360 calculates
a mixing supply water temperature based on the outdoor air temperature. The Stk# 31360 uses
a Characterized Heating Curve and optionally indoor temperature feedback from an indoor
sensor in this calculation.

HeatLink®Mixing Valve Reset Control Stk# 31360
HeatLink
®
LinkHeat
5
www.heatlinkgroup.com
General Operation
Exercising
The Stk# 31360 has a built-in exercising function. If the system pump or valve has not been operated at least once every 3 days, the control turns
on the output for a minimum of 10 seconds. This minimizes the possibility of a pump or valve seizing during a long period of inactivity. The
Stk# 31360 ensures that the mixing valve operates over its entire range at least once each exercising period. While the control is exercising, the
Test LED flashes.
Note: The exercising function does not work if power to the control, pump, or valve is disconnected.
Setback (OCC and UNOCC)
To provide greater energy savings, the Stk# 31360 has a setback capability. With setback, the supply water
temperature in the system is reduced when the building is unoccupied. By reducing the supply water
temperature, air temperature in the space may be reduced even when thermostat(s) are not turned down.
Any time the UnO Sw (12) and the Com (13) terminals are shorted together, the control operates in the
unoccupied (Night) mode. When in the unoccupied (Night) mode, the UNOCC segment is displayed in
the LCD. The Stk# 31360 adjusts the supply water temperature based on the UNOCC settings made in the
control. This feature has no effect when the control is used as a setpoint control.
Warm Weather Shut Down (WWSD) OCC & UNOCC
When the outdoor air temperature rises above the Warm Weather Shut Down (WWSD) setting, the control turns on the WWSD segment in the
display. When the control is in WWSD, the Mix Demand pointer is displayed if there is a demand. However, the control does not operate the heating
system to satisfy this demand. If the control is in setpoint mode, the WWSD feature is not functional.
12 13
Timer Switch
UnO
Sw Com
Floating Action
A 24 V (ac) floating action actuator motor is connected directly to the Stk# 31360 on the R Opn, R Cls and C terminals (9, 10 and 11). The Stk# 31360
pulses the actuator motor open or close to maintain the correct mixed supply water temperature at the mix sensor when there is a mixing demand.
The mixing valve that the actuator is connected to can be either a 2-way, 3-way, or 4-way valve. A visual indication as to whether the control is
currently opening or closing the mixing valve is displayed in the LCD.
Mixing
sensor
Boiler supply sensor
(European Version only)
Boiler
return sensor
or
Boiler Protection (Boil Min)
The Stk# 31360 is capable of providing boiler protection from cold mixing system return
water temperatures. If the boiler sensor temperature is cooler than the BOIL MIN setting
while the boiler is ring, the Stk# 31360 reduces the output to the mixing valve. This
limits the amount of cool return water to the boiler and allows the boiler temperature
to recover. This feature can only be used if a boiler sensor is installed.
Factory Defaults
The control comes preset with several factory defaults. To ne-tune building requirements, these defaults may be changed. If a factory default value
for a terminal unit is changed, the terminal unit number will flash when selected in the ADJUST menu. For the European version, these defaults
are based on the terminal unit selection page 9.
To reload the factory defaults power down the control and wait for 10 seconds. Power up the control while simultaneously holding the Item and
buttons. The terminal unit number should now be displayed constantly in the LCD rather than flashing.

HeatLink®Mixing Valve Reset Control Stk# 31360
®
LinkHeat
www.heatlinkgroup.com
HeatLink
6
Mixing Operation
System Pump Operation (Sys Pmp)
The system pump contact (Sys Pmp, terminal 5) closes whenever there is a mixing demand and the Stk# 31360 is not in WWSD. The system
pump segment is displayed in the LCD. After the mixing demand has been satised, the Stk# 31360 continues to operate the system pump for 20
seconds. This allows some residual heat to be purged out to the heating system. During WWSD, the system pump is operated based on the exercise
function.
Mixing Demand
A mixing demand is required in order for the Stk# 31360 to provide heat. A mixing demand is
generated by applying a voltage between 24 and 240 V (ac) across the Mixing Demand terminals
(1 and 2). Once voltage is applied, the Mixing Demand pointer is displayed in the LCD. If the
Stk# 31360 is not in WWSD, the Stk# 31360 closes the Sys Pmp contact. The Stk# 31360 calculates
a MIX TARGET supply temperature based on the outdoor air temperature and settings. If required,
the Stk# 31360 operates the boiler in order to provide heat to the mixing valve.
12
Mixing
Demand
24 to 240 V (ac)
North American Version
Parallel Shift
Using the
ROOM Settting
down
Outdoor Air Temperature
Supply Water Temperature
up
Starting Point
(Fixed)
End Point
By Changing
the Mix Design
and the Outdoor
Design settings
the Reset Ratio
changes
70˚F
(21˚C)
70˚F (21˚C)
Outdoor Air Temperature
Supply Water Temperature
Reset Ratio
The reset ratio requires two points to establish the rate at which the mix supply water temperature
is to be increased for every degree that the outdoor air temperature falls. The starting point of the
reset ratio is xed at 70˚F (21˚C). The end point can be changed using the OUTDOOR DESIGN
and the MIX DESIGN settings.
Outdoor Design (OUTDR DSGN)
The OUTDR DSGN is the outdoor air temperature that is the typical coldest temperature of the year where the building is located. This temperature
is used when doing heat loss calculations for the building. If a cold outdoor design temperature is selected, the mix supply temperature rises
gradually as the outdoor temperature drops. If a warm outdoor design temperature is selected, the mix supply temperature rise rapidly as the
outdoor temperature drops.
Mix Design (MIX DSGN)
The MIX DSGN temperature is the supply water temperature required to heat the mixing zones when the outdoor air is as cold as the OUTDR
DSGN temperature.
Room Occ & Unocc (ROOM)
The Room setting is the desired room temperature for the mixing zones, and it provides a parallel
shift of the Reset Ratio. If the room temperature is not correct, adjusting the Room setting increases
or decreases the amount of heat available to the building. A Room setting is available for both the
occupied and unoccupied modes.
Mix Maximum (MIX MAX)
The MIX MAX sets the highest water temperature that the control is allowed to calculate as the MIX TARGET temperature. If the control does
target the MIX MAX setting, and the MIX temperature is near the MIX MAX, the MAX segment will be displayed in the LCD while either the
MIX TARGET temperature or the MIX temperature is being viewed.
Mixing Operation (North American Version)

HeatLink®Mixing Valve Reset Control Stk# 31360
HeatLink
®
LinkHeat
7
www.heatlinkgroup.com
MIX
MAXIMUM
MIX
DESIGN
MIX
MINIMUM
OUTDOOR
DESIGN
ROOM OCC = 70˚F (21˚C)
ROOM UNOCC = 65˚F (18˚C)
WWSD OCC
WWSD UNOCC
150˚F
(66˚C)
130˚F
(54˚C)
110˚F
(43˚C)
90˚F
(32˚C)
70˚F
(21˚C)
-10˚F
(-23˚C)
10˚F
(-12˚C)
30˚F
(-1˚C)
50˚F
(10˚C)
70˚F
(21˚C)
Outdoor Air Temperature
Supply Water Temperature
Starting Point
(Fixed)
Mix Minimum (MIX MIN)
The MIX MIN is the lowest temperature that the control is allowed to use as a MIX TARGET temperature. During mild conditions, if the Stk#
31360 calculates a MIX TARGET temperature that is below the MIX MIN setting, the MIX TARGET temperature is adjusted to match the MIX
MIN setting. During this condition, the MIN segment will be displayed in the LCD when either the MIX TARGET or MIX temperature is being
viewed.
Mix Target Temperature (MIX TARGET)
When used as a mixing reset control, the MIX TARGET temperature is calculated from the
Reset Ratio settings and the outdoor air temperature. When used as a setpoint control, the
installer sets the MIX TARGET temperature. The control displays the temperature that it
is currently trying to maintain as the mix supply temperature. If the control does not have
a mix demand, “- - -” is displayed as the MIX TARGET in the VIEW menu.
Setpoint Operation (MIX TARGET)
For setpoint operation, set the OUTDR DSGN to OFF. The MIX TARGET becomes the setpoint supply temperature that the control is to maintain.
The MIX TARGET temperature is set by the installer in the ADJUST menu. An outdoor sensor is not required during this mode of operation.
Mixing Operation (North American Version)

HeatLink®Mixing Valve Reset Control Stk# 31360
®
LinkHeat
www.heatlinkgroup.com
HeatLink
8
Characterized Heating Curve
The characterized Heating Curve takes into account the type of terminal unit that the system is using. Since different types of terminal units transfer
heat to a space using different proportions of radiation, convection and conduction, the supply water temperature must be controlled differently.
Once the control is told what type of terminal unit is used, the control varies the supply water temperature according to the type of terminal unit.
This improves the control of the air temperature in the building.
Outdoor Design (OUTDR DSGN)
The OUTDR DSGN is the outdoor air temperature that is the typical coldest temperature of the
year where the building is located. This temperature is used when doing the heat loss calculations
for the building. If a cold outdoor design temperature is selected, the mixing supply temperature
rises gradually as the outdoor temperature drops. If a warm outdoor design temperature is selected,
the mixing supply temperature rises rapidly as the outdoor temperature drops.
Decreasing Outdoor Temperature
Increasing Water Temperature
cold
MIXINDR
MIXDSGN
warm
OUTDR
DSGN
Mixing Operation (European Version)
Mixing Target Temperature (MIX TARGET)
When used as a mixing reset control, The MIX TARGET temperature is calculated from the Characterized Heating Curve settings, outdoor air
temperature and optionally, indoor air temperature. When used as a setpoint control, the installer sets the MIX TARGET temperature. The control
displays the temperature that it is currently trying to maintain as the mixing supply temperature. If the control does not have a mixing demand,
“- - -” is displayed as the MIX TARGET.
System Pump Operation (Sys Pmp)
The system pump contact (Sys Pmp, terminal 5) closes whenever there is a mixing demand and the
Stk# 31360 is not in WWSD. The system pump segment is displayed in the LCD. After the mixing
demand has been satised, the Stk# 31360 continues to operate the system pump for 20 seconds. This allows some residual heat to be purged out
to the heating system. During WWSD, the system pump is operated based on the exercise function.
Indoor Sensor
An indoor sensor may be used in order to provide indoor temperature feedback. The indoor sensor is connected to the Com and Indr terminals (16
and 18). In addition, power must be applied to the Mixing Demand terminals (1 and 2) as described in the MIXING DEMAND section. With the
indoor sensor connected, the Stk# 31360 is able to sense the actual room temperature. Indoor temperature feedback ne-tunes the supply water
temperature in the mixing system to maintain room temperature. To adjust the room temperature, use the ROOM OCC or ROOM UNOCC setting
in the ADJUST menu at the control. Feedback ne-tunes the supply water temperature in the mixing system to maintain room temperature. To
adjust the room temperature, use the ROOM OCC or ROOM UNOCC setting in the ADJUST menu at the control.
If a multiple zone system is used with an indoor sensor, proper placement of the indoor sensor is essential. The indoor sensor should be located in
an area which best represents the average air temperature of the zones.
Mixing Demand
A mixing demand is required in order for the Stk# 31360 to provide heat. A mixing demand is
generated by applying a voltage of 24 V (ac) or 24 V (dc) across the Mixing Demand terminals
(1 and 2). Once voltage is applied, the Mixing Demand pointer is displayed in the LCD. If the
Stk# 31360 is not in WWSD, the Stk# 31360 closes the Sys Pmp contact. The Stk# 31360 calculates
a MIX TARGET supply temperature based on the outdoor air temperature and settings. If required,
the Stk# 31360 operates the boiler in order to provide heat to the mixing valve.
12
Mixing
Demand
24 V (ac) or
24 V (dc)
European Version
Mixing Operation
General
Installer

HeatLink®Mixing Valve Reset Control Stk# 31360
HeatLink
®
LinkHeat
9
www.heatlinkgroup.com
Mixing Operation (European Version)
Terminal Units
When using a Characterized Heating Curve, the control requires the selection of a terminal unit. The terminal unit determines the shape of the
Characterized Heating Curve according to how the terminal unit delivers heat into the building space. The Stk# 31360 provides for selection
between six different terminal unit types: two types of radiant oor heat, fancoil, n-tube convector, radiator and baseboard. When a terminal unit
is selected, the control automatically loads the design supply temperature (MIX DSGN), maximum supply temperature (MIX MAX) and minimum
supply temperature (MIX MIN). The factory defaults are listed below. To change defaults, refer to Advanced Mixing Pg. 10; If a default has been
changed, refer to Pg. 5 to reload the factory defaults.
High Mass Radiant (1)
This type of a hydronic radiant floor is embedded in either a thick concrete or gypsum pour. This heating
system has a large thermal mass and is slow acting.
Default values: MIX DSGN = 120 °F (49°C), MIX MAX = 140 °F (60°C), MIX MIN = OFF
Low Mass Radiant (2)
This type of radiant heating system is either attached to the bottom of a wood sub-floor, suspended in the
joist space, or sandwiched between the sub-floor and the surface. This type of radiant system has a relatively
low thermal mass and responds faster than a high mass system.
Default values: MIX DSGN = 140 °F (60°C), MIX MAX = 160 °F (71°C), MIX MIN = OFF
Fancoil (3)
A fancoil terminal unit or air handling unit (AHU) consists of a hydronic heating coil and either a fan or
blower. Air is forced across the coil at a constant velocity by the fan or either a fan or blower. Air is forced
across the coil at a constant velocity by the fan or blower, and is then delivered into the building space.
Default values: MIX DSGN = 190°F (88 °C), MIX MAX = 210°F (99°C), MIX MIN = 100°F (38°C)
Fin–tube Convector (4)
A convector terminal unit is made up of a heating element with ns on it. This type of terminal unit relies
on the natural convection of air across the heating element to deliver heated air into the space. The amount
of natural convection to the space is dependant on the supply water temperature to the heating element and
the room air temperature.
Default values: MIX DSGN = 180 °F (82°C), MIX MAX = 200 °F (93°C), MIX MIN = OFF
Increasing Water Temperature
Decreasing Outdoor Te mperature
MIXINDR
N
o
r
m
a
l
D
e
s
i
g
n
ROOM
A
ct
u
a
l
T
e
m
p.
Setpoint Operation (MIX TARGET)
For setpoint control, set the OUTDR DSGN to OFF. The MIX TARGET becomes the setpoint
supply temperature that the control is to maintain. The MIX TARGET temperature is set by
the installer in the ADJUST menu. An outdoor sensor is not required during this mode of
operation.
Room OCC & UNOCC (ROOM)
The ROOM is the desired room temperature for the mixing zones, and it provides a parallel shift
of the Characterized Heating Curve. The room temperature desired by the occupants is often
different from the design indoor temperature (MIX INDR). If the room temperature is not correct,
adjusting the ROOM setting increases or decreases the amount of heat available to the building.
A ROOM setting is available for both the occupied (Day) and unoccupied (Night) modes.
TERMINAL UNIT High Mass
Radiant (1)
Low Mass
Radiant (2)
Fancoil (3) Fin-Tube
Convector (4)
Radiator (5) Baseboard (6)
MIX DSGN 120˚F (49˚C) 140˚F (60˚C) 190˚F (88˚C) 180˚F (82˚C) 160˚F (71˚C) 150˚F (66˚C)
MIX MAX 140˚F (60˚C) 160˚F (71˚C) 210˚F (99˚C) 200˚F (93˚C) 180˚F (82˚C) 170˚F (77˚C)
MIX MIN OFF OFF 100˚F (38˚C) OFF OFF OFF

HeatLink®Mixing Valve Reset Control Stk# 31360
®
LinkHeat
www.heatlinkgroup.com
HeatLink
10
Mixing Operation (European Version)
Advanced
Mixing Maximum (MIX MAX)
The MIX MAX sets the highest water temperature that the control is allowed to calculate as the MIX TARGET temperature. If the control does
target the MIX MAX setting, and the MIX temperature is near the MIX MAX, the MAX segment will be displayed in the LCD while either the
MIX TARGET temperature or the MIX temperature is being viewed.
Mixing Design (MIX DSGN)
The MIX DSGN temperature is the supply water temperature required to heat the mixing zones when the outdoor air is as cold as the OUTDR
DSGN temperature.
Mixing Minimum (MIX MIN)
The MIX MIN is the lowest temperature that the control is allowed to use as a
MIX TARGET temperature. During mild conditions, if the Stk# 31360 calculates a
MIX TARGET temperature that is below the MIX MIN setting, the MIX TARGET
temperature is adjusted to match the MIX MIN setting. During this condition, the
MIN segment will be displayed in the LCD when either the MIX TARGET or
MIX temperature is being viewed. If an indoor sensor is used, and the Stk# 31360
is operating at the MIX MIN temperature, the system pump is cycled using Pulse
Width Modulation (PWM) with a 15 minute cycle length. By cycling the system
pump and controlling the flow of supply water, the control provides an average
supply water temperature to the system. This average temperature is equal to the
original MIX TARGET. This minimizes overheating of the zone while the control
is operating at the MIX MIN temperature.
Warm Weather Shut Down (WWSD) OCC & UNOCC
When the outdoor air temperature rises above the WWSD setting, the When the
outdoor air temperature rises above the WWSD setting, the Stk# 31360 turns on
the WWSD segment in the display. When the control is in Warm Weather Shut
Down, the Mixing Demand pointer is displayed, if there is a demand. However, the
control does not operate the heating system to satisfy this demand. If the control
is in setpoint mode, the WWSD feature is not functional.
70
(21)
90
(32)
11 0
(43)
130
(54)
150
(66)
170
(77)
190
(88)
Outdoor Air Temperature
Supply Water Temperature
210F
(99C)
-20
(-29)
0
(-18)
20
(-7)
40
(5)
60
(16)
80F
(27C)
MIXDSGN
MIXMAX
MIXMIN
WWSDUNOCC
MIXINDR
OUTDRDSGN
Mixing Characterized
Heating Curve
50
(10)
ROOMUNOCC
WWSDOCC
ROOMOCC
Mixing Indoor (MIX INDR)
The MIX INDR is the room temperature used in the original heat loss calculations for the building. This setting establishes the beginning of the
Characterized Heating Curve for the mixing zones.
Radiator (5)
A radiator terminal unit has a large heated surface that is exposed to the room. A radiator provides heat to
the room through radiant heat transfer and natural convection.
Default values: MIX DSGN = 160 °F (71°C), MIX MAX = 180 °F (82°C), MIX MIN = OFF
Baseboard (6)
A baseboard terminal unit is similar to a radiator, but has a low prole and is installed at the base of the
wall. The proportion of heat transferred by radiation from a baseboard is greater than that from a n-tube
convector.
Default values: MIX DSGN = 150 °F (66°C), MIX MAX = 170 °F (77°C), MIX MIN = OFF