Heat Link 31360, Manual

Page: 10 / 44

HeatLink
®
Mixing Valve Reset Control Stk# 31360
®
Link Heat
www.heatlinkgroup.com
H
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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)
110
(43)
130
(54)
150
(66)
170
(77)
190
(88)
Outdoor Air Temperature
Supply
W
ate
r
Temperatur
e
210 F
(99 C)
-20
(-29)
0
(-18)
20
(-7)
40
(5)
60
(16)
80 F
(27 C)
MIX DSGN
MIX MAX
MIX MIN
WWSD UNOCC
MIX INDR
OUTDR DSGN
Mixing Characterized
Heating Curve
50
(10)
ROOM UNOCC
WWSD OCC
ROOM OCC
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 profile 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 fin-tube
convector.
Default values: MIX DSGN = 150 °F (66°C), MIX MAX = 170 °F (77°C), MIX MIN = OFF