GeneralAire EDMK4 Elite Steam - Manual (Page 15)

Elite Steam +030222075 Rev. 3.5 – Aug. 2013 15
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 block located at the bottom left of the
control module, polarity does not matter. See Fig. 3.p
Connect the ground wire to the unit’s chassis ground, located just behind the power
wiring terminal block. See Fig. 3.q
Model
Power supply
(single phase)
Steam Output
(lbs/hr)
Steam Output
(kg/h)
POWER
(kW)
CURRENT
(A)
EXTERNAL
POWER WIRES
EXTERNAL FUSE (A)
OR BRAKER
DS15 110Vac 50/60Hz 5.5 2.5 1 .80 16 .40 AWG10 25
RS15 110Vac 50/60Hz 5.5 2.5 1.80 16.40 AWG10 25
DS25 230Vac 50/60Hz 12 5.4 3.89 16.95 AWG10 25
RS25 230Vac 50/60Hz 12 5.4 3.89 16.95 AWG10 25
3.6 Control wiring
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.
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. The
most common is a combination of a humidistat and pressure switch. The diagrams
in the figures show the connections to be made on the terminal block, in case of:
Fig. 3.u Operation performed by a simple enabling contact;
Fig. 3.t Operation controlled by an external mechanical humidistat;
Fig. 3.v A combination of both humidistat and pressure switch (most common).
Contact AB-AB:
• closed: humidifier enabled to produce steam (production starts when humidistat
closes);
• open: steam production is immediately stopped.
The remote on/off contact is usually a series of external potential-free contacts that
enable the humidifier to produce steam when all of them are closed, indicating the
duct/AHU is ready to accept steam. Connect the 12500 Pressure
Switch NO and C terminals to the AB-AB contacts.
For example,
• fan contact closes when fan is running;
• downstream cooling coil contact closes when coil is off;
• etc.
Contact IN-GND:
• closed: steam production starts if contact AB-AB is closed
• open: steam production is stopped after 5 sec.
Fig. 3.o Fig. 3.p
Fig. 3.q
L1 L2
Fig. 3.r Fig. 3.s
Fig. 3.t Fig. 3.u Fig. 3.v
DS35 230Vac 50/60Hz 12 5.4 3.89 16.95 AWG10 25
RS35 230Vac 50/60Hz 12 5.4 3.89 16.95 AWG10 25