Siemens RWI65.02 User Manual
Siemens Building Technologi es CM2N3204E / 05.2001
Landis & Staefa Divisi on 1/20
3
204
AEROGYR™
Controller
RWI65.02
for central air handling SW version 3.3
with single-speed or two-speed fans
Compact unit providing control and supervisory functions,
operating voltage AC 24 V, signal voltage DC 0...10 V.
Connection to Landis & Staefa building automation systems by means of
communication cards
In ventilating and air conditioning plants with
• hot water heating coils or electric air heater batteries
• direct expansion cooler batteries or chilled water cooling coils
• recirculated air dampers or heat recovery (HR) equipment
The RWI65.02 is used to:
• Control
– the room-supply air temperature or extract air-supply air temperature (cascade
control) with adjustable minimum and maximum limitations
– the room-supply air temperature or extract air-supply air temperature (cascade
control) with room or extract air-dependent shifting minimum and maximum
limitations (displacement ventilation)
– the supply air temperature
– the CO
2
/VOC content of the room air (demand-controlled ventilation)
– single- or two-speed fans
– air coolers
– chillers
– HR equipment
– hot water heating coils (with preheating)
– electric air heater batteries (with fan overrun)
– circulators in hot or chilled water circuits (load- or outside temperature-dependent)
– air damper actuators (with recirculated start-up circuit for modulating dampers)
– regulating units in hot and chilled water circuits
.
.
.
.
Use
CM2N3204E / 05.2001 Siemens Building Technologies
2/20 Landis & Staefa Division
• Supervise
– the air flow in air ducts
– overloads of circulators, fans and chillers
– overtemperatures of electric air heater batteries
– risk of fire or smoke
– risk of frost
– efficiency of the heat recovery equipment
Name Type reference Remarks
FLN communication card AZI65.1
1)
see data sheet 3206
LON/BACnet communication card AZI65.2
1)
see data sheet 3207
LPB communication card AZI65.3
1)
see data sheet 3208
Instructions (de, fr, it) ARG65.43
2)
included, if ordered
Instructions (en, sv, fi, no) ARG65.44
2)
included, if ordered
Instructions (nl, es, da) ARG65.45
2)
included, if ordered
Instructions (sk, hu) ARG65.47
2)
included, if ordered
1) Optional
2) Consists of operating card 2, operating instructions, and m ounting instructions
• When ordering the controller, please indicate the type reference RWI65.02. To ensure
the unit is supplied with the correct language version of the instructions, indicate the
type reference of the instructions required, e.g., ARG65.44 (for English, Swedish,
Finnish, Norwegian).
• Communication cards must be ordered separately, e.g., AZI65.1.
• Controllers and poss. communication cards are packed and supplied separately.
Name Type reference Data sheet
Temperature sensor QAA24, QAA26 1721
QAM22..., QAE21.9..., 1771, 1792
QAE22… 1771, 1792, 1791
QAD22..., QAC22, 1801, 1811
QAA64 1722
QAF63.2, QAF63.6 1821
CO
2
/VOC sensor QPA63... 1958
Processor for ventilation demand AQP63.1 1959
Remote setpoint transmitter QAA26 1721
FZA21.21, FZA61.11 3470, 3471
Signal source RVL55, 2602
PTM1.2Y10 8161
Actuator GDB161.1E; GDB163.1E 4634
GDB161.2E; GDB163.2E 4664
Automatic sensor identification (ASD logic), including type of sensor (active or passive).
Automatic activation of optimum controller configuration through ACC logic which, via
ASC, identifies the intended use of the control function. As a result, the control is
optimally matched to the plant. P-band and integral action time (TN) are separately
adjustable so that P-control (with integral action time TN = 0) or PI control can be
selected.
The controller is supplied as a PI controller. The setpoints of both heating and cooling
can be adjusted separately. Overlapping of heating/cooling sequences is not possible.
For controlling mixed air dampers or HR equipment, both the operating action and the
operating mode can be selected.
The actual values of the various outputs are permanently displayed.
Accessories
Ordering
Equipment
combinations
Technical design
Control
Siemens Building Technologi es CM2N3204E / 05.2001
Landis & Staefa Divisi on 3/20
• Room-supply air temperature or extract air-supply air temperature cascade control.
Connection of the room or extract air temperature sensors (terminal B1) and supply
air temperature sensors (terminal B2) automatically activates cascade control. With
cascade control, the room or extract air temperature is maintained at a constant level.
The room or extract air temperature represents the controlled variable whose setpoint
can be read and adjusted on the controller’s second operating level. The supply air
temperature is shifted in dependence of the deviation of the room/extract air
temperature from the setpoint of room/extract air temperature. The extent of setpoint
shift is calculated via cascade authority (adjustable from 0 to 20).
– Room supply air temperature or extract air supply air temperature cascade control
with fixed supply air limitations (mode of control 1).
If the supply air temperature drops below the limit set on the controller, the
integrated minimum limitation takes over control and prevents the supply air
temperature from dropping farther.
The set limit is maintained at a constant level. The same considerations apply to
maximum limitation.
– Room-supply air temperature or extract air supply air temperature cascade control
with shifting supply air limitations (displacement ventilation) (mode of control 2).
The shifting limits of the supply air temperature are calculated in dependence of the
actual room or extract air temperature, whereby the supply air temperature must
remain within the boundaries dictated by the selected values of minimum and
maximum limitation.
• Supply air temperature control (mode of control 3).
If a supply air temperature sensor (terminal B2) is connected, supply air temperature
control is automatically activated. With this mode of control, the supply air
temperature is maintained at a constant level.
The required mode of control can be selected.
The RWI65.02 is a sequence controller with three modulating outputs (Y10 = heating,
Y20 = cooling, Y30 = HR) and one switching output (Q13/Q24 = cooling). It allows for
control sequences using both operating actions, for dampers and HR equipment. Both
operating action and control sequences are adjustable (DIL switches no. 4 to 7).
100
Y30
min
Y10
/Y30
Y30
/Y10
Y20
SA
SD
T
w
h
w
c
X
P1
T
n1
X
P3
T
n3
X
P2
T
n2
Y
[ % ]
3204D03E
(DtPnt 33)
(DtPnt 32)
(DtPnt 6)
The basis used for compensation are the setpoints selected on the controller. These
basic setpoints can be shifted as follows:
• Compensation of the controller setpoint in dependence of the outside temperature
(terminal B4); with this function, summer/winter compensation is integrated in the
controller; the compensation characteristic is adjustable
• Compensation by means of an active or passive setting unit, either as an absolute
setpoint or in the form of setpoint shifting via signal input "Z"
• Compensation across the entire setpoint range from an L&S building automation
system via the FLN bus, LON/BACnet bus or LPB bus communication card,
depending on the respective system
Temperature control
Control sequences and
operating action
Function diagram
Setpoint compensation
CM2N3204E / 05.2001 Siemens Building Technologies
4/20 Landis & Staefa Division
This function is intended to make optimum use of the cooling energy supplied to the
plant. Based on the measured differential of outside and room or extract air temperature, the plant is operated either with reduced amounts of outside air or with heat
recovery. The controller then overrides normal control and acts on position signal output
Y30 to position it to 100 % with HR (DC 10 V) or to Y30
min.
. This function can be
selected (DIL switch no. 3).
10
0
T
B4 < B1
B4 > B1
B4 > B1
10
0
10
0
Y30
[V]
min
Y30
min
Y30
00
B4 < B1
∆T
10
0
2 K
2 K
Y30
[V]
Y30
[V]
Y30
[V]
∆T
T
3204D02E
Mixing dampers
HR equipment
During non-occupancy periods, "Unoccupied heating mode" or "Unoccupied cooling
mode" is automatically used, provided enabling took place (can be set for each function)
and the respective preconditions are met. The factory set minimum operating time is 30
min (adjustable from 0 to 12 h).
"Unoccupied heating mode" becomes active when the set supporting level for heating
(adjustable from 0 to 30 °C) is reached. Heating is provided until the room or extract air
temperature exceeds the supporting level by 1 K. In that case, the fans run at speed I or
II (depending on the preselected speed). Outputs Y20 and Y30 with operating action " \ "
are disabled (0 %).
"Unoccupied cooling mode" becomes active when the set supporting level for cooling
(adjustable from 20 to 50 °C) is reached. Cooling is provided until the room or extract air
temperature drops below the supporting level by 1 K. In that case, the fans run at speed
I or II (depending on the preselected speed). Outputs Y10 and Y30 with operating action
" \ " are disabled (0 %).
During non-occupancy periods in the summer, this function is automatically activated if
– the function has been enabled
– both the room and the outside temperature exceed their adjusted limits, and
– the difference between room and outside temperature exceeds the set value.
If the function is activated, cool outside air is drawn into the building. In that case, the
fans run at speed I or II (depending on the preselected speed). Outputs Y10, Y20 and
Y30 with operating action " \ " are disabled (0 %). The factory set minimum operating
time is 30 min. It is adjustable (from 0 min to 12 h).
20
22
24
26
18
16
14
12
t
Nmin
T
[°C]
R/A
t
T
T
R
A
Room temperature
limit
(DtPnt 12)
Outside tem perature
limit
(DtPnt 13)
Night purging active
(DtPnt 15)
End of
occupancy time
Beginnning of
occupancy time
Delta
(DtPnt 14)
3204D04E
Maximum Economy
Changeover (MECH)
Unoccupied heating
and cooling mode
Night purging
Function diagram
Siemens Building Technologi es CM2N3204E / 05.2001
Landis & Staefa Divisi on 5/20
For ventilating and air conditioning plants using hot water heating coils:
All values for frost protection (response temperatures, setpoints, P-bands, and integral
action times) are preset and can be changed. The temperature is acquired either in the
water circuit or at the air outlet of the hot water heating coil.
The protective actions are the following:
• Continuous opening of the heating valve, activation of the hot water circulator
• Deactivation of the fan or closing of the air dampers
• Maintaining the temperature when the fans are deactivated (only on the water side,
setpoint "Standby controller")
• Fault status signal when there is risk of frost
Use of the following sensors is a prerequisite:
QAE21.9 or QAD22 for frost protection on the water side.
QAF63.2, QAF63.6 for frost protection on the air side.
T Temperature in the hot water heating coil’s circuit, or air temperature just after the
heating coil
Q Load
Y Manipulated variable
Y10 Control command "Heati ng val ve"
Q13/Q14 Relay output "Hot water circulator or electric air heater battery"
Q33/Q34 Relay output "Fan speed I"
Q33/Q44 Relay output "Fan speed II"
X
pd
P-band "Frost protection c ont rol l er" (data point 18)
X
pn
P-band "Standby controller" (data poi nt 19)
w
w
Frost alarm value (data point 16)
w
wn
Setpoint "Standby controll er" (data point 17)
t
Pmin
Min. running time of hot water circ ul ator (data point 48)
This function enhances comfort and optimises energy consumption in rooms with
varying occupancy levels. An integral CO
2
/VOC controller reduces the CO2 or
CO
2
/VOC concentration in the room. The P-band, the switching values for the fan
speeds, and the design value at full occupancy are adjustable; the switching differential
is 160 ppm. Using the sensors connected to signal inputs Z, B1 and B2, the controller
acquires the actual temperature and CO
2
values. If CO2 or CO2/VOC concentrations in
the room exceed the switching value of fan speed I + ½SD, the temperature controller is
activated and the fan runs at speed I. The temperature controller maintains the preselected setpoint (Comfort or Economy). If CO
2
or CO2/VOC concentrations increase
further, fan speed II is activated. Between this function and the step output of the
scheduler program, maximum value selection takes place, with both functions having
the same priority. In the case of systems with recirculated air dampers, damper control
is activated also. Here, Y30 minimum limitation, recirculated air start-up mode, and the
frost protection controller with a higher priority act on the Y30 control signal.
Frost protection
(on the water or air side)
Function diagrams
100 100
Y
[ % ]
0
0
TQ
Q33/Q34
Q33/Q44
Q13/Q14
Y10(P) Y10(PI)
Q13/Q14
100
0
T
Y10(P)
Q13/Q14
Y
[ % ]
Y
[ % ]
2 K
X
Pn
t
Pmin
t
Pmin
t
Pmin
X
Pd
½ X
Pd
2 K
w
wn
w
w
w
w
On the air
and the wate r s i de
Plant ON Plant OFF
On the air
and the water s i de
On the air side
3204D05E
(DtPnt 16)
(DtPnt 48)(DtPnt 48)
(DtPnt 17)
(DtPnt 48)
(DtPnt 18)
(DtPnt 16)
Legend
Demand-controlled
ventilation
CM2N3204E / 05.2001 Siemens Building Technologies
6/20 Landis & Staefa Division
Integral limit controller for HR equipment such as thermal wheel type heat exchangers,
plate heat exchangers, and glycol circuits: Setpoint, P-band and integral action time are
adjustable. The limit controller is active only when the plant is in operation (fan speed I
or II).
Using the sensors connected to signal inputs Z, B1 and B2, the controller acquires the
actual temperatures. The manipulated variables delivered by the integral limit and
temperature controllers are compared with one another with the help of a priority
selector which selects the manipulated variable with the smallest value (minimum
selection). This manipulated variable reduces the output of the HR equipment. Since a
certain amount of heat is not now available from the HR equipment, the balance is
delivered by a downstream air heater battery (terminal Y10).
An additional sensor must be installed if this function is used. Three temperature values
(temperature behind the heat recovery equipment, outdoor air and extract air temperatures) are required to calculate efficiency. The calculated value is shown on the controller and it generates an alarm if it falls below an adjustable threshold value.
To display data points 103 to 111, set DIL switch No. 2 to the left (ON).
The efficiency calculation acts as a fault indicator, for example, for defective, polluted or
incorrectly connected heat recovery equipment.
This function (display/alarming) is supported by the integration solutions FLN (AZI65.1 /
UNIGYR, VISIONIK) and LON/BACnet (AZI65.2 / DESIGO 30).
When this function is used, the Z-input is not available for other functions.
The start-up mode is only used with the heating sequence Y30 with operating action "/"
(plants using recirculated air dampers). On plant start-up, either supply air temperature
control or one of the two cascade control modes is activated.
The period of time for start-up mode can be set from 0 s to 60 min. During this time, the
cooling sequence (Y20) is disabled and the hot water circulator (Y10) is activated. The
plant operates with 100 % recirculated air (pre-purging).
In the case of plants that use outside sensors, this f unction becomes active only at
outside temperatures below 15 °C.
In the case of plant start-ups initiated by "Unoccupied heating mode", "Unoccupied
cooling mode" or "Night purging", this function remains inactive.
Plant operation can be controlled from the following locations:
Manual switch (operating level 1: buttons 1 to 4), communication (FLN bus), "External
switch" (E7, E8), "Extended operation" (E7, E8), scheduler program, "Demand controlled ventilation", "Unoccupied heating mode", "Unoccupied cooling mode", night
purging, fault, commissioning.
• From an external switch:
The functions of the manual switch on the RWI65.02 (operating level 1, buttons 1
to 4) can be provided by a 4-step rotary switch with two levels.
• By the function "Extended operation":
When a pulse (of at least 3 s) is fed to E7, the plant is operated at fan speed I;
When a pulse (of at least 3 s) is fed to E8, the plant is operated at fan speed II.
• Scheduler program:
The scheduler integrated in the RWI65.02 facilitates the setting of four switching
times per day; each switching time can be assigned a fan switch position (off, speed I,
or speed II) and a setpoint pair (Economy and Comfort); the settings are made on
operating level 3.
• Summer-/wintertime changeover
This function prevents freeze-up of the hot water heating coil at low outside
temperatures (especially in plants that use on/off dampers).
The period of time during which preheating is active can be adjusted from 0 s to 10 min.
When the plant is switched on, only the hot water circulator (Q13/Q14) initially is
activated while the hot water valve (Y10) is fully open.
A
nti-icing protection fo
r
HR equipment
Efficiency supervision
of the heat recovery
system
.
.
.
.
.
.
.
.
.
.
.
Start-up mode
Control
Switching the plant via
control inputs E7 and E8
Timer
Preheating time
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