Steam Distributor Nozzle; Installation Steps - Honeywell HM750A1000 Quick Installation Manual

HM750A1000 Advanced Electrode Steam Humidifier

Steam Distributor Nozzle

NOTE
Ensure adequate spacing for either remote or duct nozzles. Be considerate of
the duct run and/or internal coils/exchanger.
Remote-Mount (Fig. 4) - The HM750 requires a steam distributor nozzle
installed in the supply-side of ductwork. The HM750 includes a 5 ft. (1.5 m).
steam hose which sits on a molded hose guide. The hose guide ensures the
steam hose points upwards and is only used when the humidifier is installed
remotely.
The steam distributor nozzle should be installed so that the steam hose maintains
a constant slope of, at least 4 inches (10 cm) RISE for every 12 inches (30 cm) of
RUN.
Duct-Mount (Fig. 5) - Alternatively, the HM750 can distribute steam into the
air duct by mounting directly onto the supply duct. In this case, the steam hose
and the molded hose guide must be removed. To do this, the cylinder must be
removed by loosening the hose clamp nearest to the cylinder steam outlet. The
short steam hose is removed, and then the molded hose guide is released using
a two-step action:
1. Pressing on the release tab, towards the back of the humidifier; and
2. Sliding the molded hose guide downwards.
3. Insert the nozzle baffle into the distribution nozzle.
The steam distribution nozzle is installed in the opposite fashion as the molded
hose guide was removed i.e. by sliding up and into place. The steam distribution
nozzle is connected to the cylinder using a short piece of steam hose, and hose
clamps at both ends. The donut-shaped foam gasket must be installed between
the humidifier and the duct.
ELECTRICAL
WARNING
Humidifier must be installed using a dedicated 15 amp
circuit breaker and hardwired directly to comply with UL
product listing. All wiring must be done per governing
electrical codes.
Electrical line cord plugs can overheat and result in risk of damage to
property and/or personal injury. Note: Product warranty will be voided if
these instructions are not followed.
CAUTION
Wiring to be performed by a licensed electrician.
Installing the unit on a GFI Circuit is recommended.
CAUTION
Equipment Damage Hazard
Failure to wire the humidifier in accordance with the wiring instructions
could cause permanent damage. Such errors will void the warranty.
CAUTION
User should not remove the device front cover while the unit
is powered.
MAIN SUPPLY
L1
L2/N
GND
Fig. 7. 120 VAC (1 Phase) Primary power connection.
33-00288EF—01
HOT
OFF ON
NEUTRAL
(OPTIONAL)
Fig. 4. Remote mount.
High Voltage Wiring
Requirements
• Use 12 AWG or 14 AWG wire
• 15 amp, 120/240 volt circuit required.
• Local disconnect may be installed for future servicing.
• Wiring must be performed by a licensed electrician.

Installation Steps

1. Bring circuit to a disconnect near the device to protect from electrical shock
when servicing.
2. Hard wire the unit to local circuit disconnect as shown in Fig. 7 and Fig. 8.
3. Connect wires to MAIN SUPPLY terminals on the humidifier control board:
L1, L2/N, and GND.
4. Ensure that the jumper on humidifier's VOLTAGE SELECTION area of the
control board is connected correctly (120 VAC or 240 VAC). The unit is
factory configured for 240 VAC. If the humidifier will run on a 120 VAC circuit,
move the jumper to 120 VAC on the Voltage Selection portion of the control
board. See Fig. 6.
Fig. 6. Voltage selection jumper on humidifier control board.
MAIN SUPPLY
L1
L2/N
GND
GROUND
M36861
Fig. 8. 240 VAC (1 Phase) Primary power connection.
2
AIR FLOW
M36946
Fig. 5. Duct mount.
120VAC
240VAC
M36944
OFF ON
(OPTIONAL)
AIR FLOW
M36947
HOT
HOT
GROUND
M36862