Comfort-Aire HMB**V*1E SERIES - Manual (Page 11)

11
If a heater kit is not installed:
1. Remove the 2 wire plug of the air handler by cutting the
wires and discarding the plug.
2. Strip the ends of the 2 air handler wires and connect
to the line-voltage leads with the 2 wire nuts provided.
Electronic Air Cleaner (EAC)
The unit has an output to power an electronic air cleaner
when the blower is running. This output is rated to 1.0
amp at 208/240V.
Humidifier
The unit has an output to power a humidifier when the
blower is running. This output is rated to 1.0 amp at
208/240V.
Optional Humidistat
(HMB**X*1E, & HMB**V*1E Series Only)
The optional humidistat may be installed in the return air
duct to provide excellent humidity control when needed
and maximum system capacity and energy efficiency when
humidity levels are normal. The humidistat senses when
humidity in the return air stream is above a preset level
(field adjustable) and sends a signal to the motor to reduce
the airflow so that more moisture may be removed until the
humidity level drops. The air handler is pre-programmed
for humidistat operation.
Install the humidistat in the return air duct as directed in
the installation instructions included with the kit. Wire the
humidistat through the low-voltage wire entrance in the
air handler to the control board terminal marked DEHUM.
Wire the humidistat to open on rise in humidity.
Grounding
WARNING:
The unit cabinet must have an uninterrupted or
unbroken electrical ground to minimize personal
injury if an electrical fault should occur. Do not
use gas piping as an electrical ground!
This unit must be electrically grounded in accordance
with local codes or, in the absence of local codes, with
the National Electrical Code (ANSI/NFPA 70) or the CSA
C22.1 Electrical Code. Use the grounding lug provided in
the control box for grounding the unit.
STARTUP & ADJUSTMENTS
Before You Start the Air Handler
Prior to start-up, complete the following inspections:
√ Verify the unit is level and properly located with adequate
clearances for servicing the unit. See Table 1 (page 4).
√ Check condensate drain line(s) for proper drainage.
√ Verify the surrounding area and top of the unit is free
from obstructions and debris.
√ Check all duct connections. Make sure the duct work
is adequately sealed to prevent air leakage.
√ Check all coil connections for leaks.
√ Verify that the line voltage power leads are securely
connected and the unit is properly grounded. Make sure
all doors are installed before restoring power to the unit
√ Verify the thermostat is wired correctly. Make sure all
low voltage wires are securely connected.
√ Verify the power supply branch circuit overcurrent
protection is sized properly.
√ Verify filter is properly and securely installed.
Air Circulation Check
Running the Blower Continuously
Set the thermostat’s system mode to OFF and the
thermostat’s fan mode to ON. The blower motor should
run continuously. Check for air delivery at the register(s).
Make sure that there are no obstructions at the registers
or in the ducts.
System Cooling
1. Set the thermostat’s system mode to
COOL and fan
mode to AUTO. Lower the thermostat’s temperature
mode below room temperature and observe that the
blower energizes. Check the air being discharged at
the register is cooler than room temperature. Verify
unit refrigerant pressures are in order. Blower should
be turning in direction indicated by arrow.
NOTE: DO NOT alter unit wiring. Listen for any unusual
noises. Locate the source and correct as needed.
2. Allow the unit to run for several minutes and then set
the thermostat’s temperature above room temperature.
Verify the blower cycles off with the thermostat.
System Heating
1. Set the thermostat’s system mode to
HEAT and the fan
mode to AUTO. Increase the thermostat’s temperature
above room temperature and observe that the blower
energizes. Check the air being discharged at the register
is warmer than room temperature.
2. Allow the unit to run for several minutes and then set
the thermostat’s temperature below room temperature.
Verify the blower cycles off with the thermostat.
Turning the Blower Off
Set thermostat’s fan mode to AUTO, the blower will shut
down immediately.