Unit Suspension; Unit Mounting - Modine HDS Manuel D'installation Et D'entretien

UNIT LOCATION / UNIT MOUNTING
5. Be sure that the minimum clearances to combustible
materials and recommended service clearances are
maintained. Units are designed for installation with the
minimum clearances as shown in table 4.1.
Table 4.1
Clearances
Clearance To
Unit Side
Combustible
Top and Bottom
Access Side
Non-Access Side
Rear
Vent Connector
6. Do not install units in locations where gas ignition system is
exposed to water spray, rain, or dripping water.
7. Mounting Height (measured from bottom of unit) at which
unit heaters are installed is critical. Refer to mounting height
information and heat throw data on page 12 of this manual.
The maximum mounting height for any unit is that height
above which the unit will not deliver heated air to the floor.
Turning The Unit 180°
All units are produced at the factory with left-side controls, when
looking at the front of the unit. If the installation requires that
the controls be on the right side, the unit heater can be "turned
over". In addition, the following instructions must be followed:
• By turning the unit 180° from the way it was received from
the factory, the sides become opposite but the front and
back remain in the same relative position. The bottom panel
now becomes the top panel and vice-versa.
• Remove the access panel, turn it 180°, and re-attach it to
the unit. This is important so that all the information labels
can be read.
• Remove the spring loaded deflector blades, turn them over,
replace, and adjust so they are open and in a position to
direct the heated air down to the floor.

UNIT SUSPENSION

CAUTION
1. Do not install units below 7' measured from the bottom of
the unit to the floor in commercial applications (unless
unit is properly guarded to provide user protection from
moving parts) and 5' measured from the bottom of the unit
to the floor in residential applications.
2. Be sure no obstructions block air intake and discharge
of unit heaters.
3. The minimum distance from combustible material is
based on the combustible material surface not
exceeding 160°F. Clearance from the top of the unit
may be required to be greater than the minimum
specified if heat damage, other than fire, may occur to
materials above the unit heater at the temperature
described.
4. Allow 18" clearance at rear (or 6" beyond end of motor
at rear of unit, whichever is greater) and access side to
provide ample air for proper operation of fan.
1. Be sure the means of suspension is adequate to support
the weight of the unit (see page 12 for unit weights).
2. For proper operation, the unit must be installed in a level
horizontal position.
4
Recommended
Service Clearance
Materials
1" 1"
1" 18"
1" 1"
18" 18"
4" 4"
3. Clearances to combustibles in Table 4.1 must be strictly
maintained.
4. Mounting bracket installation:
Before lifting the heater for suspension, the mounting
brackets must be installed. Decide if the unit will be
installed as standard; that is with left-side controls when
looking at the front of the unit or with right-side controls.
For standard (left side)remove brackets from shipping
position and remove the (3) screws along the top edge of
both the front and back of unit. Align screw holes on
mounting bracket with holes along front and back top
edges. Secure (1) mounting bracket to front of unit with
retained screws. Secure the other mounting bracket to
back of unit in a similar way. (see Figure 4.1)
Figure 4.1
Unit Heater in Standard Mounting Configuration
For right-hand, the mounting brackets are attached in a
similar manner after the unit is turned over.
5a. Suspension by screws/lag bolts:
Secure the mounting brackets to the ceiling joists or truss,
using 1/4" screws with 1/2" washers. These 1" - angle,
mounting brackets are slotted to accommodate joists
on 16" or 24" centerlines.
5b. Suspension by threaded rod:
This heater can also be hung utilizing the same mounting
brackets and threaded rod. Attach the threaded rod to the
unit mounting brackets, securing with a top and bottom nut.
Next, drill holes into a steel channel or angle iron at the
same centerline dimensions as those chosen for the heater
that is being installed. The steel channels or angle iron
pieces need to span and be fastened to appropriate
structural members. Cut the threaded rods to the preferred
length, push them through the holes in the steel channel or
angle iron and secure with washers and lock nuts, lock
washers and nuts, or a double nut arrangement like used
on the unit heater mounting brackets.
5c. Shelf mounted units:
The unit heater can also be installed on a shelf, if so
desired. The mounting brackets will need to be attached to
the heater the same manner as explained earlier, however,
to mount on a shelf the brackets must go on the bottom of
the heater. The brackets must be affixed to the shelf using
similar screws (1/4" screw with 1/2" washer) as overhead
joist or truss mounting. Be sure all clearance to combustible
requirements are met.