REVO RT
from 35A to 90A
User’s manual
31
9.6 Double Action operation (heating-cooling)
REVO RT is suitable for systems requiring heating only or a combined heating-cooling action.
The Heating/Cooling action is obtained through the following steps:
1
configuring the main control as Heating with the parameter "Action Type (
Tipo Azione
)” = “Heating” on
parameters:
• P47 Add 2047 = Heating (Value “0”) for Loop 1
• P61 Add 2061 = Heating (Value “0”) for Loop 2
• P75 Add 2075 = Heating (Value “0”) for Loop 3
2
connecting at least one of the 5 Relay Digital Outputs (DO1, DO2,...DO5), to cooling funtion by the
following parameters:
• P219 Add 2219
• P221 Add 2021
• P223 Add 2223
• P225 Add 2025
• P227 Add 2027
3
raising the configuration bits on each output
• Bit 0 = Cooling Loop 1
• Bit 1 = Cooling Loop 2
• Bit 2 = Cooling Loop 3
PID regulation works in this way:
Parameter “
Proportional band
(
Banda Proporzionale
)”
Heating
Proportional band
Parameter “
Integral Time
(
Tempo Integrale
)”
Integral time of
heating and cooling
Parameter “
Derivative Time
(
Tempo Derivativo
)”
Derivative time of
heating and cooling
Parameter “
Heating time Cycle
(
Tempo Ciclo Riscaldamento
)”
Heating
Time Cycle
Parameter “
Cooling PB Multiplier
(
Moltiplicatore PB Freddo
)”
Cooling
Proportional band
Consequently the
Cooling Proportional band
is determined by:
“
Proportional band
” x “
Cooling PB Multiplier
”, while
Integral Time
and
Derivative Time
they are the same
for both actions.
The two bands can overlap or space each other with the parameter “
Dead Band
(
Banda Morta
)”: see
Parameters P97, P123, P149 in
Chapter 11 "Parameter List"
.
For systems where the heating and the cooling output must never be active at the same time, the "dead
band" parameter will be configured with a value <0, vice versa if an overlap of the 2 bands is required, the
“Dead Band” parameter will be configured with a value >0.
Summary of Contents for REVO RT
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