Airwell SLS 2002 [20/77] English
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Airwell SLS 2002 [20/77] English

Airwell SLS 3402 [20/77] English
Page 19
Installation
4.8 Connecting the temperature sen
sor of coupled units’ manifold
(SLS at 4 circuits)
For the SLS units at 4 circuits the two heat exchang-
ers (of shell and tube type) must be connected in par-
allel through a manifold (to be provided by the cus-
tomer). The supplied temperature control sensor for
the water returning from the plant is not installed on
the unit.
The sensor, through the relevant well, must be posi-
tioned on the manifold which connects the two heat
exchangers, as explained in the instructions below.
4.9 Total heat recovery features
Temperature sensors
Temperature sensors for recovery system water con-
trol, BTRin e BTRout, are supplied by factory with
the unit, already wired, and must be fitted on the
water connections at the heat reclaim condenser
inlet and outlet (see wiring diagram)
Three-way valve
The three-way valve must be installed on-site. It per-
mits bypassing the heat reclaim condenser for cor-
rect operation at low return water temperature.
Water and electrical connections, as well as ther-
mal insulation must be made at the time of installa-
tion on-site.
The best position is close to heat reclaim condenser
(to achieve a small water circuit).
NOTE: The space required by this valve does not
permit installation on the factory
Forced shuttering
When recovery system is on, a commutation from
air condensing and water condensing takes place.
At the same time compressor is automatically shut-
tered to the 50% of its capacity for 2 minuts to
allow the control of condensation in the transient
phase. The same process takes place when the sys-
tem commutates from water condensing to air con-
densing.
Position Sensor from manifold Twin units
Master
switchboard
Slave
switchboard
IN
IN
OUTOUTOUT
Evaporator
1
Evaporator 2
Manifold
Sensor well
BT-NET
To the external hydraulic system
English
SLS1-en.qxp 29-06-2007 15:37 Pagina 19

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