Qmark Low-Profile User Manual
Page 3
Hard Wire Connection
NOTE: Unit is factory wired for cord connection and may be field
wired for hard wire connection.
1. Remove knockout from back of unit cabinet (see Figure 3).
2. Remove front inlet grille from unit.
3 Cut plug from end of supply cord and remove strain relief
bushing.
4. Route cut cord end into air curtain cabinet and out through
knockout hole in back. Replace strain relief bushing.
5. Route hard field wire into center of mounting bracket.
6. Connect power per nameplate to correct power supply in
space between air curtain cabinet and mounting bracket.
Use adequate size wire for all branch and feeder runs.
7. Install all wiring, protection, and grounding in accordance
with the National Electrical Code (NEC) and all requirements.
8. Replace front grille.
9. Unit is ready for operation.
10.Confirm unit is operating within all electrical and performance
specifications.
OPERATION
1. After power has been connected to unit, fans will start in
either preset (high/low) speed selection.
2. Air velocity is controlled by selection of high or low speed
indicator. This feature allows the setting of air velocity to
individual desired performance and energy efficiency.
3. Air direction at outlet can be controlled by adjustable vanes
at nozzle which compensates for possible draft conditions.
IMPORTANT: In freezer applications, unit is always mounted on
outside (warm side) of freezer or cooler.
NOTE: Cold air will try to escape near floor level. Warm air will
try to penetrate curtain near top of doorway. Air flow can be
controlled by direction of nozzle louvers and by high/low set-
tings.
NOTE: For best operation, the interior space must have an
equalized pressure to the exterior space.
MAINTANCE
Lubrication
Sleeve bearings are permanently lubricated and require no
further lubrication.
Cleaning
1. The air curtain cabinet may be wiped off with a damp cloth.
Do not allow motor to get wet. Do not use solvents or harsh
detergents.
NOTE: Keep air intake louvers clear of dirt and dust
accumulation which could affect performance.
2. Check blower wheels for accumulated dirt twice a year and
clean.
TO REDUCE THE RISK FOR ELECTRIC SHOCK ALWAYS
DISCONNECT AND LOCK OUT POWER SUPPLY BEFORE
SERVICING.
MAKE SURE AMP RATING OF ANY ON/OFF SWITCH
EXCEEDS NAMEPLATE AMP RATING OF MOTOR.
3
Figure 3
Figure 4
Figure 5
Knockout
Strain relief bushing
Cord
Cabinet wiring
Field supply wiring