24
It is mandatory to activate the pump by the controls of the chillers.
NOTE
b) Interconnection with single pump
Concept where each module will be interlocked with its dedicated pump, facilitating the fl ow balance in each unit. When a
module is switched off (by demand or due to a triggered alarm), the pump will automatically shut down.
Proper fl ow control is mandatory. The high / low fl ow can trigger alarms such as E-32/34/35/36, because the PID control
won’t operate correctly.
It is recommended to place a fl ow control valve at each unit inlet. We recommend an independent pressure valve so that the
fl ow is adequate regardless how many modules are in operation.
The chiller does not have on its electrical switchboard a power system for the pumps, only signal sending to on
/ off. The pump power switchboard must be installed in the field. Do not use the terminal block of the chillers to
power the pump.
IMPORTANT
For this interconnection model, it is necessary to use a non-return valve at the outlet of each module.
ATTENTION
4. Instalation (cont.)
FIG. 18 : Typical Individual-Pump Interconnection Schematic Drawing
MESTRE
ESCRAVA
ESCRAVA
ESCRAVA
ESCRAVA
ESCRAVA
ESCRAVA
ESCRAVA
Legenda:
Bomba
Válvula On/Off (24VCA)
Válvula controle de vazão
Válvula de retenção
Pump
On/Off Valve
Flow Control Valve
MASTER
SLAVE
SLAVE
SLAVE
SLAVE
SLAVE
SLAVE
SLAVE
LEGEND:
