Nortek MG2S Series - User Manual

To Next Page

LP & HIGH ALTITUDE LP GAS CONVERSION KIT

FOR INSTALLATIONS IN CANADA

INSTALLATION INSTRUCTIONS

IMPORTANT: Please read all instructions before converting

the furnace. Pay attention to all safety warnings and any other

special notes highlighted in the manual. Safety markings are

used frequently throughout this manual to designate a degree

or level of seriousness and should not be ignored. WARNING

indicates a potentially hazardous situation that if not avoided,

could result in personal injury or death.

These conversion instructions are only to be used to convert

natural gas furnaces to LP/Propane gas in Canada. This kit may

only be used in furnaces installed in altitudes between zero and

4,500 feet above sea level. For U.S. installations, the United

States conversion instructions must be used.

Table 1 is a detailed listing of the components in the LP gas

conversion kit. Please check the contents of the conversion kit

with that of the parts listing, and familiarize yourself with each

component.

For MG2S Series Furnaces & Appliances Using Honeywell Gas Valves

The installer performing this work assumes all responsibility for this conversion. These instructions are primarily intended to assist qualiﬁed

individuals experienced in the proper installation of these components. Some local codes require licensed installation/service personnel for this

type of equipment. Safety should always be the deciding factor when installing this product and using common sense plays an important role as

well. Improper installation of the components or failure to follow safety warnings could result in serious injury, death, or property damage. After

completing the installation, return these instructions to the Homeowner’s Package for owner-user’s future reference.

Table 1. LP Gas & High Altitude Conversion Kit

DESCRIPTION QTY

Honeywell Conversion Kit 50033841

(to convert VR9205Q1127)

#48 Drill Size Burner Oriﬁce Kit (661048)

Included with 60,000 Btu Models (Contains 3)

#49 Drill Size Burner Oriﬁce Kit (661049)

Included with 72,000 Btu Models (Contains 4)

#51 Drill Size Burner Oriﬁce Kit (661051)

Included with 45,000 Btu Models (Contains 3)

#59 Drill Size Burner Oriﬁce Kit (661059)

Included with 45,000 Btu Models (Contains 3)

1.1mm Burner Oriﬁce Kit (661078)

Included with 45,000 Btu Models (Contains 3)

1.1 mm Burner Oriﬁce Kit (661078)

Included with 60,000 Btu Models (Contains 3)

1.1mm Burner Oriﬁce Kit (661078)

Included with 72,000 Btuh Models (Contains 4)

1.2mm Burner Oriﬁce Kit (661079)

Included with 72,000 Btuh Models (Contains 4)

1.25 mm Burner Oriﬁce Kit (661082)

Included with 60,000 Btu Models (Contains 3)

Conversion Warning Label

Conversion Information Label

Installation Instructions

DO NOT DESTROY THIS MANUAL. KEEP IN A

SAFE PLACE FOR FUTURE REFERENCE.

FIRE OR EXPLOSION HAZARD

• Failure to follow safety warnings exactly could result

in serious injury or property damage.

• Installation and service must be performed by a qualiﬁed

installer, service agency or the gas supplier.

• Do not store or use gasoline or other ﬂammable vapors

and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone

in your building.

• Leave the building immediately.

• Immediately call your gas supplier from a neighbor’s

phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the ﬁre

department.

WARNING:

RISQUE D’INCENDIE OU D’ EXPLOSION

• Le non-respect des avertissements de sécurité

pourrait entraîner des blessures graves, la mort ou

des dommages matériels.

• L’installation et l’entretien doivent être effectués par

un installateur qualiﬁé, un organisme de service ou le

fournisseur de gazstaller, service agency or the gas

supplier.

• Ne pas entreposer ni utiliser de l’essence ni d’autres

vapeurs ou liquides inﬂammables dans le voisinage

de cet appareil, ni de tout autre appareil.

QUE FAIRE S’IL Y A UNE ODEUR DE GAZ

• Ne pas tenter d’allumer aucun appareil.

• Ne toucher à aucun interrupteur électrique; n’utiliser

aucun téléphone dans le bâtiment.

• Évacuer l’immeuble immédiatement.

• Appeler immédiatement le fournisseur de gaz en

employant le téléphone d’un voisin. Respecter à la

lettre les instructions du fournisseur de gaz.

• Si personne ne répond, appeler le service des incendies.

AVERTISSEMENT

Need help?

Do you have a question about the Nortek MG2S Series and is the answer not in the manual?

This document describes the LP & High Altitude LP Gas Conversion Kit for MG2S Series Furnaces & Appliances Using Honeywell Gas Valves, specifically for installations in Canada.

Function Description:

This kit is designed to convert natural gas furnaces and appliances to operate on LP (Liquid Propane) gas. It is specifically intended for MG2S Series furnaces equipped with Honeywell gas valves. The conversion process involves replacing key components to adapt the appliance for LP gas, including burner orifices and internal gas valve components (springs and adjustment screws). It also addresses adjustments to manifold pressure necessary for safe and efficient operation with LP gas, especially at various altitudes. The kit ensures that the converted appliance complies with Canadian electrical and gas piping codes (CGA B149.1 and CSA C22.1).

Important Technical Specifications:

Compatibility: MG2S Series Furnaces & Appliances using Honeywell Gas Valves (specifically Honeywell Conversion Kit 50033841 for VR9205Q1127).
Fuel Type Conversion: Natural Gas to LP/Propane Gas.
Altitude Range: Designed for installations at altitudes between 0 and 4,500 feet above sea level.
Components: The kit includes various drill-size burner orifice kits (e.g., #48, #49, #51, #59, 1.1mm, 1.2mm, 1.25mm) tailored for different Btu models (e.g., 39,000, 45,000, 60,000, 72,000 Btuh). It also contains specific springs and adjustment screws for the gas valve's HIGH and LOW fire regulators, a Torx-25 wrench (or requires a 3/16" flathead screwdriver), a Conversion Warning Label, a Conversion Information Label, and Installation Instructions.
Manifold Pressure (LP/Propane Gas):
- 0 to 1,999 FT Altitude:
  - 39,000 BTU: HIGH 10.0 In. W.C., LOW 4.2 In. W.C. (Orifice Size 1.1mm)
  - 57,000 BTU: HIGH 10.0 In. W.C., LOW 4.2 In. W.C. (Orifice Size 1.25mm)
  - 63,000 BTU: HIGH 10.0 In. W.C., LOW 4.2 In. W.C. (Orifice Size 1.2mm)
- 2,000 to 4,500 FT Altitude:
  - 39,000 BTU: HIGH 8.5 In. W.C., LOW 3.8 In. W.C. (Orifice Size 1.1mm)
  - 57,000 BTU: HIGH 8.5 In. W.C., LOW 3.8 In. W.C. (Orifice Size 1.25mm)
  - 63,000 BTU: HIGH 8.5 In. W.C., LOW 3.8 In. W.C. (Orifice Size 1.2mm)
Incoming Gas Line Pressure (LP/Propane): 11.0-14.0 inches Water Column.
Safety Labels: Includes a conversion warning label (P/N 703935) for the unit door, a conversion information label (P/N 711298) for the control area near the rating plate, and a gas valve conversion label for the gas valve itself.

Usage Features:

Step-by-step Conversion Process: The manual provides detailed instructions for converting the gas valve, removing and installing burner orifices, and adjusting gas pressure.
Gas Valve Conversion: Involves removing the HIGH and LOW fire cap screws, discarding the original adjustment screws and springs, installing larger springs from the kit, and then installing new adjustment screws from the kit.
Burner Orifice Replacement: Requires careful removal of existing orifices and installation of appropriate LP/Propane gas burner orifices, ensuring the correct drill number is used for the specific Btu model and altitude.
Gas Pressure Adjustment: Involves measuring supply gas pressure at the inlet pressure tap and manifold pressure at the manifold pressure tap using a manometer or similar gauge. Adjustments are made to both HIGH and LOW fire settings using the provided Torx-25 wrench.
Lighting and Adjustment of Appliance: Includes steps for turning on gas and electrical power, setting the thermostat, checking for proper ignition and flame appearance (blue flame with light yellow streaks), and verifying all gas connections for leaks using a soap solution.
High Altitude Derating: For installations at altitudes between 2,000 and 4,500 feet, the furnace input rating must be derated, which is achieved through specific burner orifices and manifold pressure adjustments as outlined in the conversion chart. Drilling out orifices in the field is strictly prohibited.
Safety Precautions: Emphasizes critical safety warnings throughout, including the need for qualified installers, proper handling of gas and electrical connections, not using open flames for leak detection, and immediate action in case of a gas smell.

Maintenance Features:

Post-Installation Checks: After conversion, the appliance must be run through three complete cycles to ensure proper operation.
Documentation: The installation instructions are to be returned to the Homeowner's Package for future reference by the owner-user.
Labeling: All conversion labels must be prominently visible after installation to indicate the appliance's converted status and specifications.
No Alteration of Original Rating Plate: The original furnace rating plate must not be altered or removed.