Installation; Unit Mounting; Piping; Electrical Connections - Modine CW 002 Manuel D'installation Et D'entretien

INSTALLATION - UNIT MOUNTING / PIPING / ELECTRICAL CONNECTIONS

INSTALLATION

Unit Mounting

1. Open front panel and line up end compartment with roughed-
in piping and position unit at ceiling or wall location. (Hinged
cabinet doors may be removed to facilitate unit installation.)
2. Fasten floor or wall mounted unit to wall studs through
the four mounting holes in the back of the unit. For ceiling
mounted units sizes 002-006, suspend four 1/4" threaded
hanger studs from ceiling joists to match mounting holes in
back of unit and fasten with lockwashers and hex nuts. (For
sizes 008-014, use a 3/8" threaded rod.)
Perma-Lap Frames
®
A Perma-Lap frame (see Figure 11.3 on page 10) provides
®
a finished appearance to a recessed wall or ceiling cabinet
unit heater. The installation is easy and assures a perfect fit
by neatly framing the heater and covering any irregularities
between the heater and the opening in the wall or ceiling.
Because the bond between wall or ceiling surfaces and the
Perma-Lap® framing is permanent, there is no opportunity for
air leakage which can cause wall streaking.
Since the enclosure front panel is never in contact with the wall
or ceiling, servicing the heater involves simply removing the
heater front panel and leaving the Perma-Lap® and cabinet
enclosure permanently fixed in the recess opening.
Perma-Lap frames allow flexibility in recessing depth. Enclosures
®
may be flush, recessed or partially recessed. Desired unit projection
on partially recessed units is accomplished by positioning the unit
within the Perma-Lap frame. The four sided Perma-Lap® frame
®
has a 3/8" projection and a 1 ½" width.

Piping

CAUTION
1. Do not reuse any electrical component which has been
wet. Such component must be replaced.
2. Do not operate the units within steam pressure greater
than 10 psig. Steam pressure must be 10 psig. or lower
to avoid excessive discharge air temperatures that could
cause burns or personal injury.
1. On standard coil (single row), connections are 7/8" ID sweat
on unit sizes 002 through 006.
On high capacity coil (2 row), connections are 5/8" ID sweat
on unit sizes 002 through 006. On high capacity coil (3 & 4
row), connections are 7/8" ID sweat on unit sizes 002 through
006.
On unit sizes 008 through 014, either standard or high capacity
coil, connections are 1 1/8" sweat. On 3 row coils connections
are 7/8" ID sweat and 1 1/8" ID sweat on 4 row coils sizes 008
through 014.
2. Supply and return lines should be adequately sized to handle
heating requirements under maximum load.
3. Attach air vent fitting at the high point of the piping in the unit
on hot water systems.
4. Install piping to provide for expansion and contraction
normally encountered with temperature changes.

Electrical Connections

1. Installation of wiring must conform with local building
codes, or in the absence of local codes, with the National
Electric Code ANSI/NFPA 70 - Latest Edition. Unit must
be electrically grounded in conformance to this code. In
Canada, wiring must comply with CSA C22.1, Electrical
Code.
1. Disconnect power supply before making wiring connections
to prevent electrical shock and equipment damage.
2. All appliances must be wired strictly in accordance with
wiring diagram furnished with the appliance. Any wiring
different from the wiring diagram could result in a hazard to
persons and property.
3. Any original factory wiring that requires replacement must
be replaced with wiring material having a temperature
rating of at least 105°C.
Failure to wire this unit according to this wiring diagram may
result in injury to the installer or user. For deviations, contact
the factory.
2. Electric wiring must be sized to carry the full load amp draw
of the motor and any controls that are used with the unit
heater. Overcurrent protectors should be sized based on
motor current rating shown on the unit serial plate, and
applicable national electric code procedures.
All units are provided with an electrical junction box. Make
wiring connections from 115V/60Hz/1Ø building service to
control box as shown on wiring diagram furnished with the
unit.
Any damage to or failure of Modine units caused by
incorrect wiring of the units is not covered by Modine's
standard warranty.
3. Location of room thermostat, when supplied, should be in
the natural circulating path of room air. Mount thermostat
about five feet above floor level where it will not be affected
by heat from the unit or other sources of drafts that would
prevent it from properly controlling room temperature. See
instructions packed with the thermostat.
4. With ceiling mounted units, a multi-speed remote fan
switch is supplied as standard. The switch can be
recessed into a standard 2 x 4 electrical wall box
Terminal Strip Connections
The terminal strip connections are designed to clamp down on
the wires. To properly connect the wires to the terminal strip:
1. Push a small flat-head screwdriver into the square hole on the
terminal. Press firmly until the screwdriver hits the back stop
and opens the terminal (see Figure 11.1).
2. Remove approximately 3/8" of insulation from the end of the
wire and push the stripped wire into the oval hole in the
terminal.
3. Remove the screwdriver. Pull on the wire to make sure that it
is securely clamped in the terminal.
4. Make sure that the terminal clamp is in contact with bare wire
(insulation removed).
11-500.7
WARNING
CAUTION
3