FUTURE® S AIR HANDLING UNIT
OPERATION AND MAINTENANCE
INSTRUCTIONS
15 December 2020
Ver 1.7 (We reserve the right to changes without prior notice)
33
8.6 FxVent controller (accessory)
If the delivery includes a Koja FxVent controller, it can be used to extensively control and monitor all the
necessary functions of the unit, depending on the equipment level. The unit is delivered with the controller
and field devices ready-connected. Basic parameters have been pre-set for the controller, after which the
final operating parameters, such as supply air temperature or fan control setpoints, must be set during
commissioning. Separate operating instructions are provided for the operation and more detailed functions
of the controller.
8.7 HR damper actuators (accessory)
Fresh- and exhaust-air damper actuators require 24 Vac or 24 Vdc supply voltage. Actuators are spring-return
with ON/OFF control so that the damper is opened by switching on the actuator supply.
HR damper actuators require 24 Vac or 24 Vdc supply voltage and 0–10 Vdc control signal to operate.
Depending on the equipment level of the unit delivery, the actuators are delivered ready-connected to the
terminal blocks or directly connected to the FxVent controller. The connections are shown in more detail in
separate electrical diagrams. If necessary, the actuator’s direction can be changed using the rotation switch
on top of the actuator casing.
8.8 Safety switch (accessory)
The protective devices for the electric components must be dimensioned correctly in order to guarantee safe
use of the unit.
Future® S units can be equipped with an optional safety switch that switches off the entire unit’s 400 V power
supply. The safety switch can be used to ensure that the equipment is de-energised, for example, for the
duration of maintenance work. When the safety switch is included in the unit delivery, the mains can be
connected directly to the safety switch connectors.
8.9 Heating coil pump group pump (pump group accessory)
The heating coil has an EC controlled pump with a 230 V power supply. The pump running may be enabled
with an external start signal. The pump can be adjusted for example by AUTOADAP, FLOWADAPT, relative
pressure, standard pressure or standard curve adjustment methods. In addition, the pump relays provide
alarm, status or standby status indication.
As a factory setting, Koja connects the pump supply cable to the circuit breaker and the pump control cable
to the switchboard terminal blocks or to the FxVent controller, depending on the delivery content. The
connections are shown in more detail in separate electrical diagrams. If the pump group is delivered
separately, the supply and control cables must be connected on site.
8.10 Heating coil pump group control valve (pump group accessory)
The control valve actuator supplied as the pump group control valve requires 24 Vac or 24 Vdc supply and
(0) 2–10 Vdc control signal to operate. In addition, the actuator provides position feedback via a 2–10 Vdc
signal. The actuator supply and control cables are ready-connected to the switchboard terminal blocks or to
the FxVent controller, depending on the delivery content. If the pump group is delivered separately, the
cables must be connected to the actuator on site.
Summary of Contents for Future S
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