GeneralAire DS50 LC Elite Steam - Manual (Page 15)

DS 50 / DS 50 LC +030222065 Rev. 1.2 15
GROUND
TERMINAL BLOCK
3.5 Power wiring
Check that the power supply voltage to be connected matches the value indicated on the rating
plate inside the electrical panel.
Insert the power and ground connection cables into the electrical panel compartment using the
strain reliefs supplied, and connect to the terminals. An external fused disconnect must be
installed. See Fig. 3.o
All wiring must be in accordance with local, state and national electric codes.
NOTE: to avoid unwanted interference, the power cables should be kept separate from any
control wiring.
NOTE: Tolerance allowed on main voltage =-15% to +10%.
Connect power wires to the power terminal. See Fig. 3.p
Model
Power supply
(single phase)
Steam Output
(lbs/hr – gal/day)
Steam Output
(kg/h)
POWER
(kW)
CURRENT
(A)
EXTERNAL
POWER WIRES
EXTERNAL FUSE (A)
OR BRAKER
DS50 230Vac 50/60Hz 20 - 58 9 6.9 30 AWG8 40 A / fast blow
DS50LC 230Vac 50/60Hz 20 - 58 9 6.9 30 AWG8 40 A / fast blow
3.6 Control wiring
The Elite Steam allows connection of any simple or automatic humidistat, and safety
devices such as high-limit humidistat, air flow proving switch, and remote on/off.
Included with the humidifier is the GFX50 Modulating Humidistat. The control will
increase a steam output if the humidity and setpoint are far apart. It will reduce output as
the humidity nears the setpoint. This allows for the most precise humidity control.
For on-off operation the humidifier is operated by the closing of a mechanical humidistat
H, or by the closing of a voltage-free remote contact, or alternatively by a combination of
both. A pressure switch is always used to confirm blower operation. The diagrams in the
figures show the connections to be made on the terminal block, in case of:
Fig. 3.r Operation performed by an external mechanical humidistat or control contact
and pressure switch;
Fig. 3.s Operation controlled by the included GFX50 Humidistat and pressure switch.
Contact AB-AB:
• Closed: humidifier enabled to produce when humidistat closes closes or increases
voltage;
• Open: steam production is immediately stopped.
• The remote on/off contact is usually the pressure switch included with the humidifier.
The pressure switch NO and C terminals are connected to the AB-AB terminals.
• The remote on/off may include safety switches wired in series with the pressure
switch. These may include a high-limit humidistat a relay that closes when fan is
running or a downstream cooling coil contact that closes when coil is off.
Contact IN-GND:
If on-off operation is enabled (see section 5.1.1):
• closed: steam production starts if contact AB-AB is closed
• open: steam production is stopped after 5 sec.
Fig. 3.m
Fig. 3.n Fig. 3.o
MODULATING
HUMIDISTAT
Fig. 3.s
Fig. 3.r
Pressure
switch
Pressure
switch