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MHG Heating 15 - RVA47 Cascade Controller

MHG Heating 15
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Procon
. AGU. C-I M BMS I
(Part No – .-)
With the use of an AGU. Clip-In Module, the boiler controller can
communicate with a BMS System.
This Clip-In Module has three V (Hz) progra mm able outputs
that can be con gured to respond to the operational status of the
boiler, for remote monitoring, such as, Healthy, Run and Lock-Out.
This Clip-In Module can also accept a -V dc or mAmp input
signal for Set-point Temperature, or Percentage Output control.
Please refer to instructions supplied with the Clip-In Module for pro-
gramming instructions (Ref. - LAGU).
. OCI C-I M LPB
C
(Part No – .-)
With the use of an OCI Clip-In Module, the Optional Extra Con-
trols detailed from . onwards can also be utilized.
One Clip-In Module is required per boiler in a Multiple Boilerarrange-
ment.
Please refer to instructions supplied with the Clip-In Module for pro-
gramming instructions (Ref. - LOCI).
. RVA C C (G)  H
The RVA Cascade Controller (Grey) is a comprehensiveunit that can
be wall or control panel mounted, and can control upto twelve Procon ,
,  &  boilers. The RVAis supplied with  No QAD System Sensors
( ow & return) anda QAC outside air sensor. Each Procon boiler MUSTbe
tted with an OCI Communication Clip-In Module, see item ..
In addition to boiler control, the RVA can provide the drivesignal
for a heating circuit pump and can provide control for storeddomestic
hot water, with the RVA providing the drive signal fora hot water
primary circuit pump.
External control input to the RVA can be by either, a VoltFree con-
tact (e.g. time clock), -v analogue input, a QAA, QAA or QAA
Modulating Room Unit.
Heating  ow temperatures are weather compensated variable (QAC supplied), if constant temperature is
required, a
Ω resistor needs to be installed in place of the outside air sensor.
If more than twelve boilers need to be controlled, then additional RVA Cascade Controllers can be con-
nected to the  rst unit in a ‘Master/Slave arrangement. Each subsequent ‘Slave’ RVA can control up to twelve
boilers each.
Standard features include Pump Overrun, Boiler Load Rotation, Frost Protection, and Pump Exercise program.
Please refer to instructions supplied with the RVA for programming instructions (Ref. - LRVAQR/LRVAS).
Fig .
Fig .
Fig .


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