Electric Connection - MCS Master DHA 140 Manuel D'utilisation Et De Maintenance

►► 3. COMPONENTS
►
REGULATION BY HYGROSTAT
The dehumidifier is prepared for external regulation by
a hygrostat. Therefore a special connector for this con-
nection is placed in the cabinet front cover (the black
connector).
The male part of the connector can be delivered as option.
The cable for the hygrostat must be connected the male
connector, terminals 1,2,PE.
If regulation by hygrostat is needed, simply connect the
two connector parts and choose pos. "auto" on the se-
lector switch.
As hygrostat we recommend our DR10*) - 4512.600. Or
our electronic hygrostat DA20 - 4512.601.
*) Important:
The DR10 hygrostat must be fixed onto a wall or si-
milar and must not be exposed for condensate or
other kind of free liquid.
The hygrostat should be approved for 10A.

ELECTRIC CONNECTION

The dehumidifier is connected 230V, 1Ph+N+PE.
The dehumidifier has a 2m cable with plug for the power
supply.
THE INSTALLED ELECTRIC HEATER
The PTC type electric heater is only functioning when
air flow through. This is the reason why no thermostats
is installed.
WARNING: DO NOT TOUCH THE ELEC-
TRIC HEATER WHEN SWITCHED ON, AS
IT IS AN UNINSULATED LIVE WIRE.
POWER CONSUMPTION & AIRFLOWS.
The dehumidifier is equipped with PTC heaters.
The energy consumption of the PTC–heater is depen-
ding of the air passing through.
At the nominal air flows for the three models, the Amp for
the heater is:
DHA140: 3A, DHA250:6A, DHA360: 8A
The airflow and the energy consumption is regulated on
the damper delivered in our standard reg.– duct system
(option).
NOTICE: the energy consumption of the electric hea-
ter in the first seconds is up to 2x nominal value in
5–10 sec. after switching on the heater.
Special for DHA360:
THE ELECTRONIC TIMER, 10K4 (on delay):
The timer has the following function:
– PTC heater E1 will be switched on 30 sec. after star-
ting–up the dehumidifier (on selector switch or by the
hygrostat).
The dehumidifier has two PTC heaters, E1 & E2. Both are
the PTC–type, which means that the switch–on Amp is 10A.
When starting up the dehumidifier, E2 is immediately
switched on. When E2 has reached its nominal Amp
(app. 5A) E1 is switched on. In this way the switch–on
Amp. is reduced compared to starting up both heaters at
the same time.
►► 4. INSTALLATION
►
The dehumidifier should be installed indoors, placed on
a wall bracket or some other horizontal basis. It should
be placed on the four pcs shock absorbers underneath
the cabinet.
CONNECTION OF DUCTS/HOSES:
The main air to be dried is normally taken from the room
and through the main air filter in the back plate.
The air intake is common for process air and reg.air.
As standard the dehumidifier is delivered with filter/filter
frame for the common air intake.
Reg.–air outlet should be fitted with duct or hose, Instal-
led draining away from the dehumidifier to allow the con-
densed water to run free. If this is not possible, a DN4
mm hole should be drilled underneath at the lowest part
of the duct.
A damper should be installed too for the adjustment of
the nominal reg.air flow (reading the Ammeter).
Dry air outlet can be connected duct or hose with the
same size as the outlet on the cabinet. See dimensions
on cabinet, FIG. 2, 3, 4.
In general ducts of the same size as placed on the dehu-
midifier should be used – or bigger.
►► 5. COMMISSIONING
►
ELECTRIC
Before starting–up the dehumidifier, check that all elec-
tric connections are made correctly.
If this is OK, just connect the plug into the electric switch,
and switch on.
DHA140:
The dehumidifier has 2 toggle switches:
– the left one: 0/I (start/stop),
– the right one: Man/Auto (Auto = hygrostat controlled).
DHA250, 360:
The selector switch SA1 has 3 positions:
– auto = operation controlled by a hygrostat
– 0 = switched off
– man = continuous operation
"Man" means continuous operation.
Especially at "auto" (with connected hygrostat):
– If it does not start–up, it can be caused by the hyg-
rostat.
– If the actual %RH is lower than the set value, the hy-
grostat contacts are open.
This can be checked like this:
– adjust the hygrostat to 20%RH, and the dehumidifier
should then be operating
– adjust the hygrostat to 90%RH, and the dehumidifier
should stop operating.
►► 6. AIR FLOWS.
►
Air flows should be adjusted.
The dry air flow should be adjusted for the nominal m
for obtaining data from the capacity diagram.
If lower dew points are wanted, you need to adjust the
dry air flow to values lower than nominal.
HOW TO ADJUST THE AIRFLOWS:
– the dry air flow can be adjusted on the optional damper
in the dry air outlet. The airflow must be measured be
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