CASCADE Controller - HydroHeat Supplies

HydroHeat Supplies Pty. Ltd. 6 Helen Kob Drive, Braeside, Victoria 3195 Phone: (03) 9588 1299 Fax: (03) 9588 2199 Web: hydroheat.com.au

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RVA 47 - 2nd edition 28.01.03

CASCADE Controller

RVA 47.320/109

Cascade Controller for heating system, for use with LUNA HT…range condensation boilers

Instructions for the INSTALLER UPDATE : 28.01.03 2nd edition

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CONTENTS Page Electrical connections 3 Wall-mounted installation 4 Water and electrical system diagrams 6-11 Description of RVA47 12 Setting the parameters 13-17 Setting the MASTER address and clock 18 Setting the RVA47 parameters for the type of room temperature control used

18

Selecting the heating curve 19 System delivery temperature minimum and maximum threshold 20 Building type 20 Controlling cascade-connected boilers 20 DHW (Domestic Hot Water) production 21 Setting up the LMU54 boiler electronic circuit board 22 Summarised example of parameters for setting 23 Connection of RVA 46 controllers 24 Test description 25 LED flash functions 25 Description of MANUAL operation key 26 Functions of non-settable special parameters (Installer) 26 Troubleshooting 27 Technical specifications 28

WARNING

THE DIAGRAMS PROVIDED IN THIS DOCUMENTATION ARE PURELY GUIDELINE AND MUST BE CONFIRMED BY A HEATING ENGINEER'S ANALYSIS.

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1 Electrical connections of RVA 47

N.B. : the SIEMENS QAC34 outside sensor must be connected directly to the boiler

*

Take care not to swap polarity when connecting

LOW VOLTAGE

H1 : Signal input (room temperature thermostat, if present) M :Sensor common ground B10 : SIEMENS QAD21 cascade delivery temperature sensor B3 : SIEMENS QAZ21 immersion temperature sensor B70 : Optional SIEMENS QAD21 cascade return temperature sensor MD : For connection of QAA50 digital room unit A6 : For connection of QAA50 digital room unit DB : SIEMENS OCI420 communications interface MB : SIEMENS OCI420 (LPB) module ground Q3 : D.h.w. (Domestic Hot Water) circuit pump Q1 : Primary heating circuit pump F1 : Live Q1/Q3 L : 230 V N : Neutral

230 V AC

6-‐pin connector, colour WHITE

4-‐pin connector, colour BROWN

2-‐pin connector, colour BLUE

2-‐pin connector, colour BLACK

2-‐pin connector, colour PURPLE *

H1 (Input signal)

L N

N

L

QAD 21

Figure 1

H1

M B10

B70 B3 QAZ 21

Q3 Q1 F1

OCI 420

MB DB

MB DB

QAD 21

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2. Wall-mounted installation of RVA 47 2.1 Requirements for wall-mounted installation

Ø The air circulation provided around the RVA47 regulator must be sufficient to disperse

the heat produced inside it. Leave a gap of about 10 mm above and below the unit, in line with the cooling slits provided.

Ø Do not supply power to the temperature regulator until its installation is complete. This will ensure that a contact cannot be established across the terminals, creating a short-circuit.

Ø The device must not be exposed to water splashes or placed close to heat sources. Ø The temperature regulator is able to operate with a room temperature varying from 0° to

50°C. 2.2 Installation procedure

Ø Before proceeding with installation, disconnect the electricity supply.

Ø The regulator's internal dimensions are 91x19 mm; the installation cavity must measure

92X92 mm. The front panel measures 96x96.

Ø Pass the wires into the chassis for wall-mounting of the controller.

Ø Connect the wire ends to their terminals, ensuring that the colours correspond (see figure 1).

Note: The connectors are coded to make certain they cannot be mixed up

Ø Make sure that the fixing levers (placed opposite each other) face into their seats.

Ø Check to make certain there is sufficient space between the front panel and the fixing levers

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Ø Slide the controller into the cut-out panel without applying any force.

Note: Do not use any tools when inserting the unit into the cut-out. If it does not fit, check the size of the cut-out and the housing.

Ø Secure the fixing levers by tightening the two screws on the front of the controller.

Note: tighten the screws only slightly. When tightening the screws, the fixing levers automatically assume their correct position.

Ø If necessary, several devices can be installed in a row on a

single electrical panel. In this case, leave a gap of at least 9 cm to allow the two doors to be opened at the same time.

Ø If the regulator has to be installed at an angle, do not tilt it at an angle of more than 30° to the vertical. Otherwise, the device may overheat internally. It is also essential to leave a gap of about 10 mm above and below the unit, in line with the cooling slits.

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Example of central heating electric system circuit with 4 cascade-connected boilers. Heating circuit controlled by zone pumps.

QZ1 QZN

Legend L : LIVE 230 V AC N : NEUTRAL SM : FLOW SENSOR (QAD21) SR : RETURN SENSOR (QAD21) SB : DHW TANK SENSOR (QAZ21)

TA : ROOM THERMOSTAT Q3 : DHW CIRCUIT PUMP QZ : ZONE PUMP RE : RELAY RP1: RELAY ZONE PUMPS (ALL PUMPS)

Zone 1 Zone N

4

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3. Description of the RVA 47 The RVA 47 Regulator is an electronic device designed to control heating systems with cascade-connected boilers. The device is also able to control a separate domestic hot water heater. The following components are necessary for operation of the RVA 47 Regulator. Ø SIEMENS OC1420 communications interface (see instructions supplied with the accessory

itself for installation and electrical connection to the boiler). Each boiler installed must have a SIEMENS OC1420 interface;

Ø SIEMENS QAC34 outdoor sensor (connected to the boiler, see instructions supplied with the boiler for the electrical connection);

Ø SIEMENS QAD21 system delivery sensor; Ø SIEMENS QAD21 system return sensor;

Description of elements Functions

Room temperature knob Adjustment of room temperature setpoint

Setting buttons Parameter settings

Lines selection buttons Selection of parameters / switching of lines

Display Display of values

Operating modes Selection of operating modes: Automatic

Continuous Standby

Function button with LED for manual operation

a) Symbols: a black dash underneath one of the symbols indicates that the corresponding function is active.

b) Data display during normal operation or during programming.

c) Display of a program line during programming.

DHW operation on/off

Figure 2

CA 68 Example :

Operation at COMFORT temperature

Example : CONTINUOUS mode operation

c)

a)

b)

ACS On/Off

Key for heating engineer only.

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4. Parameter setting for the installer 4.1 Setting level

a) End-user 1…….50 b) Installer 51…...173 To enter parameters follow this procedure:

a) Parameter settings for the END-USER

Buttons Explanation Line 1

Press one of the line selection buttons. This will take you to the programming mode "End user”.

2

Press the line selection buttons to select the required line.

3

Press the + or - button to set the required value. The setting will be stored as soon as you leave the programming mode or change to another line. The end-user parameter list contains all settings that can be made.

4

By pressing any of the operating mode buttons, you leave the programming mode "End-user”. Note: If no button is pressed for about 8 minutes, the controller will automatically return to the operating mode selected last.

Continuous display

End-user parameters

Parameters Function Range Unit Resolution Factory setting

Setting the clock 1 Time of day 0...23:59 h / min 1 min 00:00 2 Weekday

1 = Monday 1...7 Day 1 day 1

3 Date (day, month) 01.01...31.12 Day, month 1 – 4 Year ...2099 jjjj 1 – Time switch program of central heating (CH) 5 Pre-selection of weekday

1-7 7-day block 1...7 Individual days (1 = Monday)

1-7 / 1...7 Day 1 day –

6 Switch-on time 1. period - -:- -...24:00 h / min 10 min 00:00 7 Switch-off time 1. period - -:- -...24:00 h / min 10 min 24:00 8 Switch-on time 2. period - -:- -...24:00 h / min 10 min - -:- - 9 Switch-off time 2. period - -:- -...24:00 h / min 10 min - -:- - 10 Switch-on time 3. period - -:- -...24:00 h / min 10 min - -:- - 11 Switch-off time 3. period - -:- -...24:00 h / min 10 min - -:- - Domestic Hot Water (D.h.w.) values 13 Nominal setpoint of d.h.w. temperature - °C 1 55 Heating circuit (CH) 14 Reduced setpoint of room temperature - °C 0,5 16 15 Frost protection setpoint of room

temperature - °C 0,5 10

…

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16 Summer / winter changeover temperature

8...30 °C 0,5 24

17 Slope of heating curve If a 0-10 Volt signal is the required heat generation control method for the RVA47 / boiler installation, this setting must be adjusted to – The result of this change will deactivate the Auto, On/Off and frost protection lights. Adjust parameter 172=100

2,5...40 °C 0,5 32

18 Actual value of room temperature (QAA50)

0...50 °C 0,5 -

19 Actual value of outside temperature. To reset the attenuated outside temperature to, press the + and - buttons simultaneously for 3 seconds.

-50…+50 °C 0,5 -

Standard values 23 Standard times (line 5...11 and 29…35)

To activate, press the + and – buttons simultaneously for 3 seconds

0/1 – 1 0

Service 29 Pre-selection of weekday

1-7 7-day block 1...7 Individual days (1 = Monday)

1-7 1....7

Weekday 1 day -

30 Switch-on D.h.w time 1 00:00..23:59 hh:mm 10 min 06:00 31 Switch-off D.h.w time 1 00:00..23:59 hh:mm 10 min 22:00 32 Switch-on D.h.w time 2 00:00..23:59 hh:mm 10 min - -:- - 33 Switch-off D.h.w time 2 00:00..23:59 hh:mm 10 min - -:- - 34 Switch-on D.h.w. time 3 00:00..23:59 hh:mm 10 min - -:- - 35 Switch-off D.h.w time 3 00:00..23:59 hh:mm 10 min - -:- - 50 Indication of faults 0..255

00.01–14.16 - 1 -

b) Parameter settings for the INSTALLER

Buttons Explanation Line 1

Press both line selection buttons for at least 3 seconds. This will take you to the programming mode "Heating engineer”.

2

Press the line selection buttons to select the required line.

The installer parameter list contains all settings that can be made.

3

Press the + or - button to set the required value.

The setting will be stored as soon as you leave the programming mode or change to another line.

4

By pressing any of the operating mode buttons you leave the programming mode "Heating engineer”. Note: If no button is pressed for about 8 minutes, the controller will automatically return to the operating mode selected last.

… 173

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00000000000000000

Installer parameters


51 Output test 0 Control mode according to the operating state 1 All outputs OFF 2 D.H.W. pump is activated Q3 3 Heating circuit pump is activated Q1

0...3 – 1 0

52 Input test 0 Cascade return temperature 1 D.H.W. temperature (B3); 2 Flow temperature (B10); 3 NOT used 4 Room temperature (QAA50) 5 Input signal H1 according to parameter n° 170;

0...5 – 1 0

53 Display of plant type 27..36 / 65..67 - 1 - Display of actual values 56 Cascade flow temperature (B10) 0...140 °C 1 -

57 Cascade return temperature (B70) 0...140 °C 1 -

59 D.h.w. temperature 0...140 °C 1 -

60 Attenuated outside temperature -50.0...+50.0 °C 0.5 - 61 Composite outside temperature -50.0...+50.0 °C 0.5 - 62 Outside temperature source - - - - Display of SETPOINTS 66 Input temperature from BMS or cascade 0...140 °C 1 - 69 D.h.w. temperature 0...140 °C 1 - 70 Nominal room temperature (COMFORT) 0.0...35.0 °C 0,5 - 71 Room temperature 0.0...35.0 °C 0,5 - 72 Flow temperature (Q1 pump zone) 0...140 °C 1 - System setting 75 Display of the available cascade boilers

--- 00.1...16.3

- 01.1 -

76 Display of the lead boiler --- 00.1...16.3

- 01.1 -

77 Remaining number of operating hours for changeover of boiler sequence Only if a value is selected on line 130, otherwise the LCD displays “ - - -“

0...990 Hour 1 -

Configuration of plant 95 Pump function output Q1

1 Heating circuit pump or no pump 2 Primary pump for HCSs only 3 Primary pump for heating circuits and D.H.W.

storage tank 4 D.h.w. circulating pump 5 Pump H1

1...5 - - 1

97 Use of sensor input B70/B4 1 Cascade return temperature (B70) 2 Not used (B4)

1...2 - 1 1

100 Parallel displacement of heating curve -4.5...+4.5 K (°C) 0,5 0,0 101 Gain factor for room temperature

influence (with QAA50) 0 Inactive 1 Active

0 / 1 - 1 1

102 Switching differential of room temperature - - . - Inactive 0,5...4,0 Active

- - . - / 0.5...4.0

K (°C) 0,5 - - . -

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CH setting 103 Minimum limitation of cascade flow

temperature setpoint 8..(param.104) °C 1 8

104 Maximum limitation of cascade flow temperature setpoint

(param.103)..95 °C 1 80

105 Type of building construction 0 Heavy / 1 Light

0 / 1 - 1 1

106 Adaptation of heating curve (with QAA50)

0 Inactive / 1 Active 0 / 1 - 1 1

107 Maximum forward shift of optimum start control 0 No forward shift

00:00..06:00 hh:mm 10 min 00:00

108 Maximum forward shift of optimum stop control 0 No forward shift

00:00..06:00 hh:mm 10 min 00:00

D.h.w. 120 Reduced setpoint of D.h.w. temperature 8..par13 °C 1 40 121 Release of d.h.w. heating

0 24 h/day 1 According to the heating circuit time switch

programs with forward shift 2 According to D.h.w. time switch program

(parameters 29…35)

0...2 - 1 1

122 Switching program circulating pump 0 According to heating circuit time switch program 1 According to release of D.h.w. heating

0...1 - 1 1

123 Assignment of d.h.w. heating 0 For local consumer only 1 For all consumers in the same segment 2 For all consumer in the system

0...2 - 1 2

124 D.h.w. charging 0 Once per day (forward shift 2,5 h) 1 Several times per day (forward shift 1h)

0 / 1 - 1 1

125 Type of D.h.w. demand 0 Sensor 1 Control thermostat

0 / 1 - 1 0

126 Flow temperature boost for D.h.w. 0...30 K 1 16 127 D.h.w. priority

0 Absolute 1 Shifting 2 Parallel 3 Mix. (Shifting, absolute)

0...3 1 1 1

129 Demand for heat with reduced D.h.w. setpoint 0 No (application with buffer storage tank) 1 Yes

0 / 1 - 1 1

130 Changeover of boiler temperature in cascade --- NO automatic changeover (fixed boiler

sequence param.132) 10...990 Changeover according to the selected

number of hours

--- 10...990 - / Hours 10 500

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Cascade setting 131 Exclusion with automatic changeover of

boiler sequence 0 None 1 First boiler 2 Last boiler 3 First and last boilers

0...3 - 1 0

132 Lead boiler with the fixed sequence 00.1...16.3 - 01.1 - 133 Switch-on delay lag boiler 2...120 min 1 5 134 Restart lock of gas boilers 0...1800 s 10 300 140 Device address

0 Not used 1...16 Device number

0...16 - 1 1

141 Segment address 0 Setting = 0 1...14 Not used

0...14 - 1 0

144 Displaying the LPB communication (connectors MB-DB)

ON / OFF - - -

145 Range of action of central changeover 0 In the segment 1 In the system (if segment address = 0)

0 / 1 - 1 1

146 Automatic Summer / Winter changeover 0 Effect on local heating circuit only 1 Central changeover of all heating circuits

0 / 1 - 1 0

147 Central standby switch 0 OFF (inactive) 1 ON (all units on standby)

0 / 1 - 1 0

148 Clock mode 0 Do not set 1 Do not set 2 System time with remote adjustment 3 System clock (master)

0...3 - 1 3

149 Winter / summertime changeover 01.01..31.12 Day, month 1 1.10 150 Summer / wintertime time changeover 01.01..31.12 Day, month 1 1.3 Input signal H1 170

Input H1 0 Changeover of operating mode (HC standby / d.h.w. off) 1 Changeover of operating mode (HC standby) 2 Minimum setpoint of flow temperature (setting on

line 171) 3 Heat generation lock 4 Heat demand DC 0…10 V If a 0-10 Volt signal is the required heat generation control method for the RVA47 / boiler installation, Parameter 17 must be adjusted to -- The result of this change will deactivate the Auto, On/Off and frost protection lights. Adjust parameter 172=100

0...4 - 1 0

171 Minimum setpoint of flow temperature contact H1 If parameter 170 = 2

8...80 °C 1 70

172 Maximum value of heat demand If parameter 170 = 4

5...130 °C 1 80

173 Operating action of contact H1 0 N.C. contact 1 N.O.

0 / 1 - 1 0

Note: all the lines which are displayed on HMI and QAA73 but not reported in this list, are not interesting for this type of gas boilers.

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5. Setting the MASTER address and clock

5.1 Setting the address

To ensure correct communications, the RVA 47 regulator and all the electronic components connected to the system (boilers plus any RVA 46 temperature regulators) must be addressed correctly. The RVA 47 regulator must have address = 1. Parameter 140 must be kept at the factory setting (1). See chapter 12 for setup of the boiler electronic circuit boards. To connect RVA46 temperature regulator to the system see paragraph 14 and the instructions provided with the RVA 46 temperature regulator.

5.2 Setting the clock

The clock of the RVA 47 regulator must be set as MASTER, since it is to act as reference for all the system components.

Parameter 148 must be kept at the factory setting (3).

N.B.: The time, day and year must only be set on the MASTER regulator. All the devices set

as slaves are updated automatically.

6. Setting the RVA 47 parameters for the type of room temperature control used

6.1 No direct control (without QAA50/TA)


6.2 With TA room temperature thermostats

PARAMETERS TO BE SET:

PARAMETER DESCRIPTION Factory setting Value to be set 170 Input signal 0 1 173 Input signal contact H1 1 0

6.3 With QAA50 digital room units


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7. Selecting the heating curve The heating curve (or temperature curve) sets the setpoint value of the heating circuit delivery temperature in relation to the value measured by the outdoor sensor.

To set the heating curve, proceed as follows:

Ø Select program line n° 17. Ø Press the +/- keys to set the curve required (factory setting = 15). Ø For low temperature heating systems (e.g. underfloor systems), set a low gradient curve. N.B.: if the QAA50 digital room unit is connected to the system, the RVA 47 regulator will adapt the curve automatically by selecting the one best suited to the room's heat requirement.

7.1 Parallel location of the heating curve The correct parallel location of the heating curve ensures that the room temperature required will be provided quickly, especially in systems without QAA 50 digital room unit. The room temperature setpoint can be increased or decreased appropriately by changing the set value.

TE = Outside composite temperature TM = Flow temperature

Legend :

Figure 4

TM = Flow temperature TE = Outside composite temperature TRw = Room temperature setpoint

Legend :

Figure 5

TE

TM

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Ø Select program line n° 64.

To increase or decrease the setpoint of the heating system delivery temperature, proceed as follows:

Ø Select program line n° 100. Ø Press the +/- keys to locate the curve, with the following effects:

Increase in value: the delivery temperature increases; Decrease in value: the delivery temperature decreases;

N.B.: the parallel location of the curve can also be optimised by turning the knob (fig. 2).

8. System delivery temperature minimum and maximum threshold

The minimum and maximum thresholds set the range within which the delivery temperature is permitted to vary, in order to prevent excessively high or low delivery temperatures.

To set the thresholds, proceed as follows:

Ø Select program line n° 103. Ø Press the +/- keys to set the delivery temperature value minimum limit. Ø Select program line n° 104. Ø Press the +/- keys to set the delivery temperature value maximum limit.

9. Building type As the outdoor temperature changes, the indoor temperature varies in relation to the building's heat storage capacity. This means that the type of building set directly affects the heating circuit delivery temperature. To set the type of building, proceed as follows:

Ø Select program line n° 105. Ø Press the +/- keys to set the type of building (0/1):

- 0: heavyweight buildings (with thick walls or good thermal insulation); - 1: lightweight buildings (with thin walls or poor thermal insulation).

10. Controlling CASCADE-connected boilers Cascade-connected boilers are controlled automatically by the RVA47 regulator, which pilots their operation in sequence in order to guarantee the following conditions: - same number of operating hours for each individual boiler; - automatic change of the LEADER boiler every 500 operating hours. This parameter can be

modified (parameter n° 130); - operating strategy designed to minimise the number of times each individual burner is switched

on and off. To allow this, the system waits as long as possible before switching on and off any boiler except the leader boiler.

Control of the boilers can be customised using parameters 130-134.

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11. DHW production Domestic hot water can be produced in three ways: 1) By means of a DHW heater connected to just one boiler: N.B. - This boiler must have address 2 (see section 12). 2) By means of a DHW heater connected to the system: in this case the DHW heater is connected downstream of the flow divider. 3) By means of an instantaneous boiler: N.B. - the instantaneous boiler must have address 2 (see section 12). In all cases, DHW production can be controlled using the RVA 47 regulator. DHW sensor The ACS sensor varies depending on whether the system comprises a DHW heater connected to one of the boilers (sensor code: KHG714076810) or connected downstream of the flow divider (sensor code: KHG714079010 SIEMENS QAZ21).

11.1 DHW production modes

In cases 1 and 2, the way DHW production is programmed can be set:

Ø Select program line n° 121. Ø Use the +/- keys to set the mode:

1 = 24 hours a day (always on); 2 = in accordance with the timed heating program (parameters 5…11); 3 = in accordance with the regulator's timed DHW program (parameters 29…35).

N.B.: the DHW anti-freeze protection function is always enabled, regardless of the operating mode set.

11.2 DHW production priority In case 1, DHW always takes priority over operation of the boiler. In case 2, it is possible to set the priority to be assigned to DHW production in relation to heating.

Ø Select program line n° 127. Ø Use the +/- keys to set the DHW priority : 0 = absolute. With a DHW request present, the heating pump Q1 is always off; 1 = shifting. The heating system pump Q1 is only switched off if the system is not able to

deliver sufficient energy for the DHW service. 2 = no priority (parallel). Both circuits have the same priority; on receipt of their respective

requests for heat, Q1 and Q3 operate independently of each other; 3 = combined. Both circuits have the same priority. If the DHW demand exceeds the system's

heating capacity, the heating system pump Q1 is switched off and any mixer valves are closed.

For a best management of the system set parameter 127 = 3 (combined).

The factory value set is 1 = shifting

SIEMENS QAZ21 immersion sensor

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12. Setting up the LMU54 boiler electronic circuit board

12.1 Setting the ADDRESS

This parameter must be set to allow the boilers to operate in sequence. Each boiler must have a different address. The maximum number of boilers which can be connected to the system is 12. The procedure for changing the boiler settings using the control panel is as follows: a) press the ▼▲ keys on the boiler front panel (fig. 6) simultaneously for about 3 seconds, until parameter H90 appears on the display; b) press the ▼▲ keys to select parameter H 605; c) press the +/- keys to set the addresses of the

connected boilers: 2..3..4…..12. d) press the key to exit the programming

function and save. d) once programming is complete, the flashing message E183 appears for about 3 seconds.

TABLE 4 – Setting the ADDRESSES of the boilers connected to the system

PARAMETER DESCRIPTION Factory setting Value to be set H605 ADDRESS 1 2,3,4…12

N.B.: the boiler which also provides the DHW function must have address 2.

12.2 Setting the clock

This parameter must be modified to set the time shown on the boiler's front panel subordinate to the time of the regulator RVA 47. The procedure for changing the boiler settings using the control panel is as follows and is the same as described in point 12.1:

Ø Select program line H 604 as described in the previous point. Ø Press the +/- keys to set clock b0 = 1.

Important: The number to be changed is preceded by the code "b0" and is the first to appear when program line H 604 is selected.

N.B. Never modify the numbers preceded by the codes "b1…b7".

Level Parameter Description Factory setting Value to be set H 604 Time setting 0 1

b0. 1 1

H605

Figure 6

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12.3 Setting the system type

The electronic circuit board must be set up for the type of system present. Ø Select program line H 552 as described in point 12.1. Ø Press the +/- keys to set the boiler's water system type. For all boilers not connected to a DHW heater, this parameter must be set = 80. For a boiler with its own Dhw tank or an external Dhw tank, this parameter must be set = 81. If a dual-purpose instantaneous boiler is used, this parameter must be set = 82.

12.4 Summer/winter changeover temperature Ø Select program line H 516 as described in point 12.1. Ø Press the +/- keys and set the value = 30. 12.5 Setting the maximum boiler output in kW (75/60°C) Ø Select program line H 543 as described in point 12.1.; Ø Press the +/- keys to set the value. Parameter H 543 = Pmax “maximum boiler output” (kW). N.B.: For the maximum boiler output value in kW (75°/60°C) refer to the boiler’s label.

13. Summarised example of the parameters for setting Example of system equipped with: 1 (one) RVA 47; 4 (four) only heating gas boilers (one of them connected to a D.H.W.tank);

Summarised table of parameters for setting

Address Hydraulic circuit Clock Summer/winter changeover temperature

Manufacture informations Component

Par. Setting Factory setting Par. Setting Factory

setting Par. Setting Factory setting Par. Setting Factory

setting Par. Setting RVA 47 140 1 - - - 148 3 3 - - - - -

Boiler n° 1 H605 2 H552 81 H604 H516 H543 Boiler n° 2 H605 3 H552 H604 H516 H543 Boiler n° 3 H605 4 H552 H604 H516 H543 Boiler n° 4 H605 5

1

H552 80

35

H604

1 0

H516

30 20

H543

Pmax (kW)

Programming order 4 2 3 1 N.B.: The maximum number of boilers which can be connected to the system is 12.

The maximum number of gas boilers and RVA 46 regulators which can be connected to the system are 14.

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14. Connection of RVA 46 controllers

In the case of mixing circuit (high+low temperature) the management of low temperature zone has to be controlled using RVA 46 devices. Important : parameter 86 (segment) of all the RVA 46 controllers must be set =1.

Parameter 85 (address) of each RVA 46 must be progressive beginning from n°1. Parameter 95 and 145 of RVA 47 must be setting as described below in the summarised table.

Example of hydraulic circuit system equipped with: n° 1 RVA 47 - n° 2 RVA 46 - n° 4 gas boilers.

Summarised table of parameters for setting

Device Parameter Setting Factory setting RVA 47

Segment 141 0 0 Address 140 1 1 Range of action of central changeover 145 0 1

Pump Q1

95 1 1 Frontal command panel Gas boiler address n°1 H605 2 1 Gas boiler address n°2 H605 3 1 Gas boiler address n°3 H605 4 1 Gas boiler address n°4 H605 5 1 1° RVA 46

Segment 86 1 0 Address 85 1 0

2° RVA 46 Segment 86 1 0 Address 85 2 0

TANK

Legend: MR: FLOW HEATING RR : RETURN HEATING SM : FLOW SENSOR (QAD21) SR : RETURN SENSOR (QAD21) Q2 : HEATING CIRCUIT PUMP VM: MIXING VALVE VZ : ZONE VALVE SB : TANK SENSOR SI : HYDRAULIC DIVIDER TA : ROOM THERMOSTAT BP : BAYPASS

Figure 7

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15. TEST description Once the regulator has been installed and the relative electrical connections made, the following tests should be performed for rapid identification of malfunctions and/or failures: - output test (or relay test)

- input test (or sensor test)

15.1 OUTPUT test (or relay test)

Ø Select program line n° 51. Ø Press the +/- keys to perform the various stages of the

test.

The test sequence is as follows: 0 = all contacts activated in accordance with the normal

operating settings; 1 = contacts deactivated 2 = pump ACS (Q3) on 3 = heating pump (Q1) on

15.2 INPUT test (or sensor test)

Ø Select program line n° 52. Ø Press the +/- keys to perform the various stages of

the test. At each stage of the test the relative output is activated and can therefore be checked.

The test sequence is as follows:

0 = displays the temperature of the cascade return sensor (B70); 1 = the ACS (B3) temperature; 2 = displays the cascade delivery temperature (B10); 3 = NOT used 4 = displays the room temperature (with QAA50) 5 = displays the input signal H1 in accordance with the settings of parameter n° 170; • 000 : thermostat short-circuited; • - - - : no thermostat connected or no heat demand

(thermostat with open circuit).

16. LED flash functions Case 1: RVA 47 with QAA50 digital room unit.

In this case, the operating mode of the RVA 47 regulator must be set as "AUTO". The "AUTO" LED flashes when the demand of the QAA50 digital room unit is different from that of the RVA 47 temperature regulator.

Case 2: RVA 47 with TA room temperature thermostat.

When the room temperature thermostat is not requesting heat, the STAND-BY LED (figure 10) flashes.

60°C

0 52

Figure 9

12:45

1

Figure 10

Pump Q3

Pump Q1

At each stage in the test the relay contact is active and can therefore be tested.

2 51

Figure 8

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17. Description of MANUAL operation key Manual operation is an operating mode in which all the system's components must be regulated and monitored by hand. The regulator's functions no longer affect the relays. Manual operation is active when the key shown in figure 11 is pressed and the associated LED is on (the key and the LED can only be seen when the lid is opened). THIS KEY MUST ONLY BE ACTIVATED BY THE HEATING ENGINEER, TO ALLOW THE SYSTEM TO OPERATE IF THE TEMPERATURE REGULATOR MALFUNCTIONS. 18. Functions of non-settable special parameters (installer)

18.1 Anti-legionnaire's disease function The anti-legionnaire's disease function is activated automatically every Monday morning the first time the DHW system requests heat. N.B.: if there is no request for DHW, the function is activated at the first request for DHW

on the days which follow.

18.2 Pump anti-jamming function This function prevents the heat and DHW circuit pumps from jamming after a period out of use. The pumps are operated for 30 seconds once a week.

18.3 Anti-freeze protection function

The DHW heater anti-freeze protection system ensures that the temperature of the DHW circuit never drops below 10°C (parameter 15). The heating circuit pump comes into operation in relation to the outdoor temperature value, as shown in the table below, in order to prevent ice from forming in the circuit.

Outdoor temperature (°C)

Pump operation

.…-4 Continuous -5.…+1,5 10 minutes every 6 hours +1,5…. Deactivated

18.4 Heating pump post-circulation time When the last boiler switches off, pump Q1 keeps operating for a time of 5 minutes, to prevent local overheating inside the system.

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19. Troubleshooting In case of malfunctions, the message "Er" (Error - Figure 12) appears on the display. Malfunctions can be displayed as follows:

Ø Select program line n° 50. Ø Press the +/- keys to display the malfunctions.

N.B.: the RVA 47 regulator is able to save up to 2 malfunctions, which can be called onto the display in sequence by pressing the +/- keys. Malfunctions can be displayed in two ways:

- only the error code (e.g.. 10 - figure 12.1 ); - address segment combined with the error code (e.g.10.0.01)

MALFUNCTION indication table Display MALFUNCTION description

“ “ No malfunction 10 Outside sensor 20 NTC boiler flow sensor (D.h.w.) 26 System flow sensor (SM) 46 System return sensor (SR) 50 D.h.w. temperature sensor 58 D.h.w. thermostat 60 QAA73 digital room unit failure 61 QAA50 digital room unit failure 62 Room temperature unit not compatible 70 D.h.w. temperature sensor 81 OCI 420 communications interface short-circuit or electricity supply failure 82 Interface address error (addresses identical) 86 QAA50 digital room unit short-circuited

100 System contains 2 Master clocks 110 Boiler STB safety thermostat (or flue gas thermostat) tripped 132 Under-floor system safety thermostat (if any) tripped 133 No flame after safety time 135 Fan electricity supply failure 146 Hydraulic system setting error 147 No boiler connected 150 Boiler malfunction 151 Boiler circuit board internal error 153 RESET key pressed without reason 160 Fan speed threshold not reached 164 Hydraulic differential thermostat enabling signal missing

segmento Error code

Address segment

12:45

Er.

Figure 12

10 50

Figure 12.1

HydroHeat Supplies Pty. Ltd. 6 Helen Kob Drive, Braeside, Victoria 3195 Phone: (03) 9588 1299 Fax: (03) 9588 2199 Web: hydroheat.com.au

Page 28 of 28


20. Technical specifications

Power supply voltage AC 230 V (+/-10%) Rated frequency 50 Hz (+/- 6%) Power absorption 7 VA max Insulation class II under EN 60730 Degree of protection IP 40 under EN 60529 Electromagnetic protection Conforms to EN 50082-2 Electromagnetic emissions Conforms to EN 50081-1 Permitted ambient temperature

storage and transport -25…..+70°C (1K3 under IEC 721-3-1/IEC 721-3-2) operation + 0….+50°C (3K5 under IEC 721-3-3)

Control relay voltage AC 24…..230 V

rated current 50 mA (24V)...2 A (230 V) --- cosϕ > 0.7 peak current 10 A max. for 1 sec.

Fuses 10 A max. Max. line length - terminals MB-DB (Ø 0.8 mm interchangeable)

75 m

Max. line length - terminals MD-A6 (wire 2x1.5 mm² not interchangeable)

250 m

Sensor wiring length Ø 0.6 mm

1.0 mm² 1.5 mm²

max. 20 m max. 80 m max. 120 m

Weight 0.5 kg approx. In its commitment to constantly improve its products, reserves the right to alter the specifications contained herein at any time and without previous warning. These Instructions are only meant to provide consumers with use information and under no circumstance should they be construed as a contract with a third party.

Code 922.889.1

Wire area

Date post:	14-Mar-2023
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