MG2S Installation Manual

21
WARNING:
The reduction of input rating necessary for high
altitude installation may only be accomplished
with factory supplied orifices. Do not attempt to
drill out orifices in the field. Improperly drilled
orifices may cause fire, explosion, carbon
monoxide poisoning, personal injury or death.
Generally, conversion requires the replacement of the
burner orifices and the spring & stem assembly in the
pressure regulator. In the U.S., if the installation is above
2,000 ft., refer to Table 11, (page 36) to determine the
correct orifice size and regulator pressure. See example
below.
Conversion to LP / Propane is detailed in the installation
instructions provided with the conversion kit. The
conversion instructions for US installations are only to
be used to convert natural gas furnaces to LP/Propane
gas in the United States. For installations in Canada, the
Canadian conversion instructions must be used. Please
follow the instructions provided with the kit.
When conversion is complete, verify the manifold pressure
and input rate are correct as listed in the Tables.
EXAMPLE
Elevation: .................................................. 5,000 feet
Type of Gas: .........................................Propane Gas
Input BTU of Furnace: ...................................60,000
From Table 11, find 60,000 Btuh and follow across the
row to the 5,000 FT column. The manifold pressure
listed is 4.2 for Low and 10.0 for High. The listed orifice
size is 56.
ELECTRICAL WIRING
WARNING:
ELECTRICAL SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical
power to furnace.
• When servicing controls, label all wires prior
to disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
AVERTISSEMENT :
RISQUE DE DÉCHARGE ÉLECTRIQUE,
D’INCENDIE OU D’EXPLOSION
Le non-respect des avertissements de sécurité
pourrait entraîner des blessures graves ou des
dommages matériels.
Un entretien inapproprié peut provoquer un
fonctionnement dangereux, des blessures graves,
la mort ou des dommages matériels.
• Avant toute intervention, couper l’alimentation
électrique du générateur d’air chaud.
• Pour l’entretien des commandes, étiqueter tous
les fils avant de les débrancher. Rebrancher les
fils correctement.
• Vérifier le bon fonctionnement après l’intervention.
Line Voltage Wiring
• Electrical connections must be in compliance with all
applicable local codes with the current revision of the
National Electric Code (NFPA 70).
• For Canadian installations the electrical connections
and grounding shall comply with the current Canadian
Electrical Code (CSA C22.1 and/or local codes).
• It is recommended that the line voltage (115 VAC) to
the furnace be supplied from a dedicated branch circuit
containing the correct fuse or circuit breaker for the
furnace as listed in Table 8, (page 33).
IMPORTANT NOTES:
If replacing any of the original wires supplied with the
furnace, the replacement wire must be copper wiring
and have a temperature rating of at least 105°F (40°C).
For electrical specifications, refer to the furnace
nameplate or Table 8.
Proper line voltage polarity must be maintained in
order for the control system to operate correctly.
Verify the incoming neutral line is connected to the