Manual

Page 9 of 16
Drawing : - TPC180
Issue : - 4
Date : - 09/12/13
SPECIAL FEATURES
CONTROL AND WARNING INDICATOR HUMIDISTAT
The SPP6A dehumidifier unit is fitted with a control panel fixed to the outside
of the dehumidifier cabinet, the panel incorporates two humidity’s, which
measure the relative humidity of the air within the room/space. The first
humidistat incorporates a pointer and a scale, and is adjustable to a set point.
The second humidistat has no pointer or scale, and is pre-set and fixed at the
factory at the customers requested set point.
FIRST HUMIDISTAT
The humidistat controls the on/off function of the dehumidifier unit, when the
relative humidity of the air in the room/space falls below the set point of the
humidistat the dehumidifier unit will switch off, but when the relative humidity
of the air within the room/space rises above the set point of the humidistat the
dehumidifier unit will switch on.
SECOND HUMIDISTAT
This humidistat which is factory pre-set at 60%RH is connected to a warning
indicating system. This warning indicating system will be monitored by the
customer and will indicate that the relative humidity of the air within the room
has risen above the pre-set 60%RH level due to a fault, either with the
dehumidifier unit or due to some other circumstance and requires attention of
a service engineer.
TEMPERATURE CONTROLLED DEFROST
The SPP6A dehumidifier unit is fitted with temperature sensitive device which
will operate in conjunction with the defrost control. In normal operation the
defrost control will come into operation every 40 minutes, this is to ensure that
there will be no build up of ice at lower temperatures, but where year round
conditions need to be maintained the dehumidifier unit will have to operate
across a wider range of temperatures. To ensure that the dehumidifier
operates at its most efficient this temperature sensitive device will restrict the
defrost operation to the times when the evaporator coil is at -2ºC.
INDICATOR BOX
The indicator box, which is sealed against water ingress, is connected to the
dehumidifier in the mains input cable; it has three indicating lamps mounted
under a transparent front panel.