GB.BlueBox.180415
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BT1
BT50
MF1
MF2
BT30
BT40
3.1.6 Reversible chiller/
heat pump and external heating
The heating or cooling capacity of the supply air is con-
trolled via an IQlogic
+
module (extra regulation sequence
function, see separate instructions for the TBIQ IQlogic
+
module) preset for heating and cooling (0-10 V). The
function can be activated in the hand-held terminal of the
GOLD air handling unit (see the Operation and Mainte-
nance 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 reversible chiller/heat pump
can be activated under Functions in the hand-held micro
terminal of the GOLD unit. See Section 5.
Cooling
If temperature sensor BT1 calls for cooling, the function
transmits a start signal for cooling and a refrigerant set-
point (12°C*) to the reversible chiller/heat pump via Mod-
bus.
If the temperature by temperature sensor BT50 is lower
than the temperature by temperature sensor BT30**, the
function allows valve MF1 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 MF1 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 reversible
chiller/heat pump. 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 MF1 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 MF1 is
open less than 80%*, the controller increases the refriger-
ant temperature setpoint at a rate of 0.6K/minute*.
Heating
If temperature sensor BT1 calls for heating, the function
transmits a start signal for heating and a heating medium
setpoint (40°C*) to the reversible chiller/heat pump via
Modbus.
If the temperature by temperature sensor BT50 is higher
than the temperature by temperature sensor BT30**, the
function allows valve MF1 to regulate the flow.
Modbus
0-10 V
GOLD
Supply
air
Swegon chiller/heat pump
A pump and accumulator tank can be
added and, depending on the size of the
system, can be located inside or outside
the chiller/heat pump.
The external air heater can be
of water-coil or electric type.
If the temperature by temperature sensor BT50 is lower
than the temperature by temperature sensor BT30**, the
function does not allow valve MF1 to regulate the flow
(forces it to close).
Optimisation function active:
Optimisation is not carried out if temperature regulation is
selected for extract air regulation.
To ensure the best functionality when the optimisation
function is activated, the heating diff. value (3 K*) should
be set to the same value as that set in the reversible chiller/
heat pump. See Section 5.
If the temperature by temperature sensor BT40 (reference
water) is within 3K* from the heating medium tempera-
ture setpoint and if it has been so during a continuous
period of more than 60 seconds* the optimisation func-
tion is allowed.
If the optimisation function is allowed and valve MF1 is
fully open (100%*) the controller increases the heating
medium temperature setpoint at a rate of 0.3K/minute*.
If the optimisation function is allowed and valve MF1 is
open less than 80%*, the controller decreases the heating
medium temperature setpoint at a rate of 0.6K/minute*.
* Factory setting. The value can be changed.
** Estimated temperature in the GOLD RX.
