INDIVIDUAL COMFORT MODULES 42BJ
Important: If the ICM is fitted with a return air temperature sensor, the constant fresh air flow rate must not exceed 50% of the air flow rate delivered by the unit at minimum speed. Note: The 16.6 l/s or 60 m3/h fresh air controller can be modified on site by removing or retracting of the two plastic restrictions in order to bring its capacity up to a maximum constant fresh air flow of 44.4 l/s (160 m3/h). A label attached to the 42BJ shows how to modify the control of the two plastic restrictions. Note: To operate correctly, the 8.3 l/s (30 m3/h) constant fresh air flow controller requires a differential pressure in the range 50 Pa to 200 Pa. The 16.6 l/s (60 m3/h) constant fresh air controller requires a differential pressure in the range 70 Pa to 200 Pa. PTC electric heater (option) These are high-performance PTC electric heaters (PTC = positive temperature coefficient) which make use of two technologies: electric heating and surface temperature limitation (a state-of-the-art technology based on the use of ceramics). The true dissipated power is then dependent on the temperature and flow rate of the incoming air.
Enhanced comfort without stratiﬁcation: supply air temperature = 35°C
The technology ensures totally safe self-regulation of the dissipated power. In addition, each electric heater is fitted with a self-resetting safety thermostat of the normally closed type that cuts out when the temperature rises to 70°C with an average differential of 20 K. Caution: It is vital to disconnect the ICM from the general power supply before carrying out any work on the electric heater.
It should be noted that the valve body is the same for whatever controller option is chosen. Electrothermal actuator The actuator is a 230 V a.c. on/off type. Linear movement is provided by the expansion and contraction of a wax element heated by an electrical resistor. Two-way 1/2” valve body - 1/2” male BSP connection for union nuts - Straight valve body with arrow indicating direction of ﬂow embossed on valve body - Nominal size DN 15 for 1/2” valve - Fluid: water and glycol solution (max. 40% glycol) - Operating range: 2-90°C - Nominal pressure: PN 16 bar (1600 kPa) - Kvs = 1.6 Three-way 1/2” valve body (with integral bypass) - 1/2” male BSP connection for union nuts - Straight valve body with arrow indicating direction of ﬂow embossed on valve body - Nominal size DN 15 for 1/2” valve - Fluid: water and glycol solution (max. 40% glycol) - Operating range: 2-90°C - Nominal pressure: PN 16 bar (1600 kPa) - Kvs = 1
Water valve pressure drop
Water flow rate, l/s (l/h)
Pressure drop, kPa
1 2 Kvs = 1 Kvs = 1.6