– 5 –
Une tuyauterie adéquatement dimensionnée doit être
posée jusqu'à l'unité. Veuillez noter que la pression de
la tuyauterie d'alimentation en gaz doit correspondre à
celle spécifiée sur la plaque d'identification, lorsque
l'unité fonctionne à plein rendement.
Refer to the heater's rating plate for determining the
maximum supply pressure to the heater.
Correctly sized piping must be run to the unit. Please
note that gas line pressure must be as shown on
specification plate when unit is operating at full input.
F. Field Wiring and Remote Control Installation
1. Connect the power lines to the line side of the main
disconnect switch.
2. Mount and wire remote control panel, thermostats,
temperature sensors, and any other field installed
controls as indicated on the unit control wiring diagram.
3. Connect the wires to the appropriate field wiring
terminals as indicated on the unit control wiring diagram.
4. If the optional low temperature limit was not an
integral part of the heater, the factory recommends
that a low temperature limit control be installed in
areas where freeze protection is needed in the
event of burner shut down.
5. Field wiring shall have a temperature rating of at
least 105
°
C. The minimum size of the supply cable
circuit shall be sufficient for the maximum ampacity
of the heater.
L'installation éléctrique d'utilisateur aura une
température qui évalue d'au moins 105
°
C. La
minimum de source du circuit de câblage sera
suffisante pour le ampacity maximum de l'appareil
de chauffage.
G. Locating Temperature Controls
The room or outdoor thermostats should be mounted
where they will not be subjected to direct impact of the
heated air or radiant heat from the sun. It is also
recommended that thermostats, especially those with
mercury bulb contacts, be mounted on a vibration free
surface. The side of building columns away from the
heater or interior walls are usually the location best
suited for mounting thermostats.
Controls with outdoor bulbs require that the outdoor bulb
be shielded from direct radiation from the sun. Unit
mounted sensors are factory located and mounted.
SECTION IV - PRE START-UP
A. Pre Start-Up
1. The owners representative or equipment operator
should be present during start-up to receive instruc-
tions on care and adjustments of the equipment.
All equipment has been factory tested, adjusted,
metered and inspected to meet conditions set at
the time the order was placed. Only minimal
adjustments should be required. All information in
this service manual is typical. All products are
semi-custom and changes may occur.
Suggested Tools and Instruments
Volt/Ohm Meter
Thermometer
Tachometer
Ammeter
Manometer (0-10" W.C.)
Microammeter
Standard Hand Tools
D.C. Volt Meter
Gas Pressure Gauge (0-35 lbs.)
NOTE: All servicing and adjustments of the Direct
Gas-Fired unit should be performed by a qualified
service engineer.
CAUTION: Line side of disconnect may be energized.
2. Remove all shipping blocks, brackets and bolts
from supply fan base with optional isolation base.
3. Check all wiring for loose connections and tighten
if necessary.
4. Inspect all fan and motor bearings and lubricate if
necessary.
CAUTION: DO NOT RUPTURE GREASE SEALS.
5. Inspect pulleys and belts for tightness, tension and
alignment. Do not overtighten belts.
6. Check set screws on all bearings, pulleys and fans
for tightness.
7. Check voltage supplied to disconnect switch; the
maximum voltage variation should not exceed
±
10%. Phase voltage unbalance must not exceed 2%.
8. Check thermostat(s) for normal operation.
9. Check that system duct work is installed and free
from obstructions.
10. Check that fans turn free in housing.
