Install Instructions

General Filters
Incorporated
13 | P a g e
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 Figure 3.p.)
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 Figure 3.p.)
Connect the ground wire to the unit’s chassis ground, located just behind the power
wiring terminal block. (See Figure 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 BREAKER
DS15
110Vac 50/60Hz
5.5
2.5
1.80
16.40
AWG10
25
DS25/DS25LC
230Vac 50/60Hz
12
5.4
3.89
16.95
AWG10
25
(Since 25A breakers are not readily available in the Canadian market, use a 30A DP breaker.)
3.6 Control Wiring
Elite Steam Humidifiers allow for the connection of any simple or automatic
humidistat, safety devices such as high-limit humidistat, air flow proving switch, or
remote ON/OFF switch (Figure 3.r.).
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 below show the connections to be made on the terminal block,
in case of:
Figure 3.s. Operation controlled by an external mechanical humidistat
Figure 3.t. Operation performed by a simple enabling contact
Figure 3.u. 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 seconds.
Figure 3.p.
Figure 3.q.
Figure 3.r.
Figure 3.u.
Figure 3.t.
Figure 3.s.
Table 3.h.