GB.BlueBox.180415
Swegon reserves the right to alter specifications.
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BT1
BT50
BT40
MF2
MF1
BT30
3.1.4 Chiller and external heating
The cooling capacity of the supply air is controlled via an
IQlogic
+
module (extra regulation sequence function, see
separate instructions for the TBIQ IQlogic
+
module) preset
for cooling (0-10 V). The function can be activated in the
hand-held terminal of the GOLD air handling unit (see the
Operation and Maintenance Instructions for the GOLD).
The function controls external heating (waterborne or
electric) via the GOLD unit’s ordinary output for heat-
ing (0-10 V). The air heater for heated water has a frost
monitor function and is automatically activated when it is
connected.
Communication with the chiller can be activated under
Functions in the hand-held micro terminal of the GOLD
unit. See Section 5.
If temperature sensor BT1 calls for cooling, the function
transmits a refrigerant setpoint (12°C*) to the chiller via
Modbus.
If the temperature by temperature sensor BT50 is lower
than the temperature by temperature sensor BT30**, the
function allows valve MF2 to regulate the flow.
If the temperature by temperature sensor BT50 is higher
than the temperature by temperature sensor BT30**, the
function does not allow valve MF2 to regulate the flow
(forces it to close).
If dehumification is active, the function allows valve MF1
to regulate the flow.
Optimisation function active:
To ensure the best functionality when the optimisation
function is activated, the value for cooling diff. (2 K*)
should be set to the same value as that set in the chiller,
see Section 5.
If the temperature by temperature sensor BT40 (reference
water) is within 2K* from the refrigerant temperature
setpoint and if it has been so during a continuous period
of more than 60 seconds* the optimisation function is
allowed.
If the optimisation function is allowed and valve MF2 is
fully open (100%*) the controller decreases the refriger-
ant temperature setpoint at a rate of 0.3K/minute*.
If the optimisation function is allowed and valve MF2 is
open less than 80%*, the controller increases the refriger-
ant temperature setpoint at a rate of 0.6K/minute*.
* Factory setting. The value can be changed.
** Estimated temperature in the GOLD RX.
Modbus
0-10 V
The external air heater can be
of water-coil or electric type.
GOLD
Supply
air
Swegon chiller
A pump and accumulator tank
can be added and, depending
on the size of the system, can
be located inside or outside the
chiller.
