GB.BlueBox.180415
Swegon reserves the right to alter specifications.
2 www.swegon.com
BT1
BT50
BT40
MF2
BT30
3. Operation
See below and the following pages for diagrammatic
descriptions of the function.
3.1 Control of cooling/heating to the GOLD
via Swegon chiller/heat pump
3.1.1 Chiller
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).
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).
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
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.
