wirsbo DuoMix 201, Руководство по установке

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DuoMix Installation Handbook 3
Wirsbo 201
tekmar
Zone Control
°
F
SB 2 3 4 SB 2 3 4 SB 2 3 4
R1 R2 Y1 Y2 R1 R2 Y1 Y2 R1 R2 Y1 Y2
C
R
S
ES
ES
C
R
S
ES
ES
Wirsbo Zone Control Module
Duo
Mix
External Mixing Demand
When 24 or 120 V (ac) is applied to the Mix1 Demand terminals, the control
turns on mixing pump 1 ( Mix1 Pmp) and operates the variable speed
injection pump 1 (
Var1 Pmp). If 24 or 120 V (ac) is applied to the Mix2
Demand terminals, the control turns on mixing pump 2 (Mix2 Pmp) and
operates the variable speed injection pump 2 (
Var2 Pmp). The external
demands may be obtained from the WIRSBO zone control, zone valve
endswitches, or relay contacts.
Indoor Sensor
An indoor sensor may be connected to a mixing section in order to obtain indoor temperature feedback. The SENSOR 1 or 2 setting must
be set to INDR through the display interface. An external mixing demand is still required in order to provide heat.
tekmar Zone Control
Outdoor reset can be combined with zoning. Through Room Temperature Units (RTU), a
tekmar Zone Control can provide indoor temperature feedback to the WIRSBO 201 control.
The 201 will then adjust the supply water temperature to satisfy the zone with the highest water
temperature requirement. Heat to the remaining zones will be cycled on and off by the zone
control using zone valves or pumps. If a tekmar Zone Control is connected to either the mixing
1 and/or mixing 2 sections, an external demand is not required, although it is still operational
for additional zones that are controlled by thermostats.
Boiler Enable
When heat is required in the heating system the WIRSBO DuoMix 201 turns
on the
Boiler Enable relay. Once the Boiler Enable relay is turned on, a
minimum of 3 minutes is allowed before turning the relay back off if the
supply water temperatures are satisfied and the injection pumps have
ramped down to 0%. If the heat demand is removed, the boiler is immedi-
ately turned off.
Boiler Protection
A boiler sensor must be installed on the return line to the boiler in order to
obtain boiler protection against flue gas condensation, if required. If the
boiler return water temperature approaches the boiler minimum setting (
Boil
RET), the control maintains the Boiler Enable relay on and reduces the
speed of the injection pump 2. If the boiler temperature still does not
increase, then the speed of injection pump 1, will be decreased.
System Maximum Supply
The WIRSBO DuoMix 201 has a maximum supply setting ( MAX SUP 1 and MAX SUP 2) for
each mixing loop, which sets an upper operating limit to the mixed supply water temperatures
for the application in which the tubing is installed. This value is different than the Design Supply
Setting (
DSN SUP1 and DSN SUP2).
SETPOINT OPERATION
The WIRSBO DuoMix 201 can be used to provide one or two fixed water temperatures to the
mixing loops. The setpoint (
SETP) mode of operation on mixing 1 or mixing 2 must be selected
through the display interface. When 24 or 120 V (ac) is applied to the Mix1 Demand terminals,
the control turns on the mixing pump 1 (
Mix1 Pmp) and operates the variable speed injection
pump 1 ( Var1 Pmp) in order to supply the adjusted SETPNT 1 water temperature. The mixing
2 section operates in the same manner.
SNOW MELTING OPERATION
The mixing 2 section on the DuoMix 201 may be used to control a snow
melting system. The snow melting mode of operation must be selected
through the display interface (
SNOW). When the Start button is pressed and
held for 1 second on the control or on the Remote Module Unit 040, the
control enters the snow melting mode of operation and displays the
RUN
TIME. The RUN TIME can now be adjusted for the desired operating time.
The snow melting can also be enabled by the Remote Snowmelt Enable Kit
A3040039. At any time during the snow melting session, the melting time
remaining may be viewed. (See View Menu). An external
Mix 2 Demand for
4 seconds is equivalent to pressing the Start button. If the Snowmelt Enable
Kit is not desired, a Slab Sensor A3060072 and a Universal Sensor
A3060071 are required for snow melt operation.