Qmark High Velocity Electric Heated - Manual (Page 4)

7. To remove motor blower assembly, lift from rear of motor hous-
ing to prevent damage and misalignment to shaft and blower
wheels. Once the motor/blower assembly is removed, the
heater assembly will be accessed.
NOTE: After unpacking unit, inspect carefully for any damage that
may have occurred during transit. Check for loose, missing or dam-
aged parts. The hinged Cabinet Wiring Compartment cover should
also be opened to inspect the components and wiring inside.
8. Make sure the open coil elements do not touch any metal part
and all the porcelains holding the elements are not broken and
are in their proper place.
For 2 Cabinet Units: 72”, 84” and 96” See Figure 5
1. With packaged units on the floor, carton arrows should point
upward. Cartons are marked A & B.
2. Follow Steps 2 through 8 for Single Cabinet Units.
NOTE: Cabinet A (left), Cabinet B (right). Carton labeled
Cabinet B will contain the Main Control Box and all harness
wires and parts bag to interconnect the two cabinets.
For 3 Cabinet Units: 108”, 120”, 132” and 144” See Figure 6
1. With packaged units on the floor, carton arrows should point
upward. Cartons are marked A, B and C.
2. Follow Steps 2 through 8 for Single Cabinet Units.
NOTE: Cabinet A (left), Cabinet B (center), Cabinet C (right).
Carton labeled Cabinet C will contain the Main Control Box
and harness wires and parts bag to interconnect the three
cabinets. Cabinet B may also have harness wires to inter-
connect to Cabinet A.
INSTALLATION
For Single Cabinet Units:
NOTE: All installation should be done to meet local building codes.
1. Using template provided, determine mounting location.
2. Drill holes and attach mounting hardware (not included).
3. Mount cabinet on wall and securely tighten hardware.
4. Replace motor/blower assembly in cabinet. Pass pres-
sure switch hose through proper hole on blower base.
Reconnect motor electric cord plug assembly.
5. Attach pressure switch hose to right blower housing.
6. Secure two wing nuts on blower base.
7. Replace intake grille with louvers facing down and fasten
knurled nuts.
Field Power Wiring: Refer to Wiring Diagram and
Nameplate.
1. Before wiring be sure that available power supply, voltage,
phase and frequency corresponds to that specified on unit rat-
ing plate. In addition, make certain that service capacity is suf-
ficient to handle load imposed by the heated air curtain.
2. Install all wiring, protection and grounding in accordance with
the National Electrical Code (NEC) and all local requirements.
3. Run proper size copper power supply conductors from the field
power supply disconnecting means (supplied by others) with
insulation rated 75 degrees C minimum (167º F) to the power
supply blocks provided at the Main Control Box of the air cur-
tain. This field supplied disconnecting means shall be provided
to disconnect the heater, motor controller(s) and any supple-
mentary overcurrent protective devices from all ungrounded
conductors. This disconnecting means shall be within sight of
the heater, motor controller(s) or supplementary protective
devices. If it is not within sight or is located greater than 50
feet, disconnecting means shall be capable of being locked in
the open position.
4. The heater control box must have an unbroken electrical
ground from its Main Control Box to its field supplied discon-
necting means to minimize personal injury in case an electrical
fault should occur.
5. Always refer to nameplate data and wiring diagram located on
the inside of the hinged cover of the main control box for
important information and other data before proceeding with
wiring of the unit.
NOTE: This heated air curtain is equipped with a step-down
transformer 24V control circuit. Any standard 24V heating ther-
mostat with or without fan control may be used. Door switches
may be used to control the operation of the unit. A door switch
may be connected to control the operation of the fan only or it
can be connected in parallel with the heating thermostat to call
for fan and heat every time the door is opened. The thermostat
may call for fan and heat even when door is closed. The step
down transformer is a 75 VA approved Class 2 transformer and a
control knockout is provided with the control terminal blocks
spaced away from power wire to allow Class 2 wiring for controls
but it is recommended to use Class 1 wiring, especially to door
switches to protect it from physical damage in an industrial or
commercial environment.
6. Replace hinged cover of the main control box.
7. Unit is ready for operation.
8. Restore power to the unit. Call for heat through the thermostat
or through the door switch if supplied. Unit should run. Check
for correct air flow.
9. Inspect unit for excessive vibration during operation. If exces-
sive vibration is noticeable, disconnect power supply. Inspect
mounting installation and refer to “Trouble Shooting Chart” for
probable cause.
Field Control Wiring: Refer to Wiring Diagram.
! WARNING
Make sure no combustible material nor any other foreign mate-
rial falls on this heating element cavity while it is exposed with
the motor/ blower assembly out of the cabinet
Figure 4
CAUTION !
THE HARDWARE AND THE SUPPORTING STRUCTURE MUST
BE CAPABLE OF SUPPORTING A MINIMUM 150 LB LOAD.
! WARNING
ALL HEATED AIR CURTAINS SHOULD BE INSTALLED BY
QUALIFIED PERSONNEL.
!
WARNING
THE MOTORS OF THIS HEATED AIR CURTAIN HAVE AN
INTERNAL SELF RESETTING THERMAL OVERLOAD PRO-
TECTOR. ALWAYS DISCONNECT FROM POWER SUPPLY
BEFORE SERVICING.
Styrofoam
support
block