Nortek VR104GD Series

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Premium Model Shown

13.4 SEER2 / 81% AFUE

Single Package Gas Heating / Electric Cooling

(V)R104GD

INSTALLATION INSTRUCTIONS

WARNING AVERTISSEMENT

FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly could

result in serious injury or property damage.

RISQUE D’INCENDIE OU D’EXPLOSION

Si les consignes de sécurité ne sont pas suivies à la

lettre, cela peut entraîner la mort, de graves blessures

ou des dommages matériels.

– 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

neighbors phone. Follow the gas suppliers

instructions.

• If you cannot reach your gas supplier, call the

fire department.

– Installation and service must be performed by

a qualified installer, 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 SI UNE ODEUR DE GAZ EST

DÉTECTÉE

• Ne mettre en marche aucun appareil.

• Ne toucher aucun interrupteur électrique; ne pas

utiliser de téléphone dans le bâtiment.

• Quitter le bâtiment immédiatement.

• Appeler immédiatement le fournisseur de gaz

en utilisant le téléphone d’un voisin. Suivre les

instructions du fournisseur de gaz.

• Si le fournisseur de gaz n’est pas accessible, appeler

le service d’incendie.

– L’installation et l’entretien doivent être effectués

par un installateur ou une entreprise d’entretien

qualifié, ou le fournisseur de gaz.

DO NOT DESTROY THIS MANUAL. READ ALL INSTRUCTIONS IN THIS MANUAL AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

NE PAS DÉTRUIRE. LIRE TOUTES LES INSTRUCTIONS DONNÉE DANS LE MANUEL ET CONSERVER EN UN LIEU SÛR POUR RÉFÉRENCE ULTÉRIEURE.

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This document provides installation, operation, and maintenance instructions for a single package gas heating and electric cooling unit, specifically the (V)R104GD model, with 13.4 SEER2 and 81% AFUE.

Function Description

This unit is designed for outdoor rooftop or ground-level slab installations, providing both gas heating and electric cooling. It is intended for use with high static duct systems in residential applications. The appliance automatically lights the burner and does not have a pilot light.

Important Technical Specifications

The unit is fully charged with R-410A refrigerant. Electrical Data (Table 11):

024K (45000/72000 BTUH heating input): 208/230-60-1 electrical supply, 12.8 RLA, 58.3 LRA, 1.0 fan amps, 3.8 blower motor amps, 20.8 minimum circuit ampacity, 30 maximum over-current protection.
030K (45000/72000 BTUH heating input): 208/230-60-1 electrical supply, 14.1 RLA, 73 LRA, 1.46 fan amps, 3.8 blower motor amps, 22.9 minimum circuit ampacity, 35 maximum over-current protection.
036K (72000/96000 BTUH heating input): 208/230-60-1 electrical supply, 16.7 RLA, 79 LRA, 1.46 fan amps, 5.4 blower motor amps, 27.7 minimum circuit ampacity, 40 maximum over-current protection.
042K (72000/96000 BTUH heating input): 208/230-60-1 electrical supply, 18 RLA, 117 LRA, 1.46 fan amps, 5.4 blower motor amps, 29.4 minimum circuit ampacity, 45 maximum over-current protection.
048K (96000/120000 BTUH heating input): 208/230-60-1 electrical supply, 21.8 RLA, 117 LRA, 1.46 fan amps, 5.4 blower motor amps, 34.1 minimum circuit ampacity, 50 maximum over-current protection.
X60K (96000/120000 BTUH heating input): 208/230-60-1 electrical supply, 26.3 RLA, 134 LRA, 1.46 fan amps, 7 blower motor amps, 41.3 minimum circuit ampacity, 60 maximum over-current protection.

Gas Information:

Natural Gas Manifold Pressure (in WC): Ranges from 3.5 to 2.6 depending on altitude and heating value (Table 3). Orifice size is typically #43 or #46.
LP/Propane Gas Manifold Pressure (in WC): Ranges from 10 to 8.5 depending on altitude (Table 4). Orifice size is typically #54, #55, or #56.
Gas Pipe Capacities (Table 9): Provides cubic feet per hour for various pipe diameters and lengths.
Gas Flow Rates (Table 10): Lists cubic feet per hour per revolution of gas meter for 1, 5, and 10 cubic foot meters.

Airflow Data:

Nominal Heating Airflow Rates & Temperature Rises (Table 7): Provides CFM and temperature rise for various heating inputs and external static pressures.
Nominal Cooling Airflow Rates & Temperature Rises (Table 8): Provides CFM and temperature rise for various cooling capacities and external static pressures.
External Filter Sizes (Table 1): Recommended filter sizes for different nominal cooling tonnages, with approximate airflow ranges and filter areas.
Internal Filter Sizes (Table 1): Recommended filter sizes for different cabinet heights and outdoor fan diameters, with approximate airflow ranges and filter areas.

Usage Features

Installation: Designed for outdoor rooftop or ground-level slab installations. Requires specific clearances to combustibles (Figure 1). Can be converted from horizontal to downflow duct connections.
Thermostat Control: Operates from a 24 VAC Class II control circuit. A single-stage cooling/heating thermostat is used for basic operation, while a 2-stage cooling/heating thermostat is recommended for economizer operation.
Blower Speed: Equipped with a multi-speed motor. For ECM type motors, speed selection is made by moving leads on the blower motor terminal block.
Safety Features: Includes flame roll-out control, flame sensor, pressure switch, and over-temperature limit control to ensure safe operation. Diagnostic codes (Table 5) are provided for troubleshooting.
High Altitude Conversion: Requires factory-supplied orifices and manifold pressure adjustment.
LP/Propane Gas Conversion: Requires a special manufacturer-supplied kit and replacement of natural gas orifices with appropriate LP/Propane orifices, followed by manifold pressure adjustment.

Maintenance Features

Filter Maintenance: Air filters are not supplied and must be installed upstream of the evaporator coil. Filters must be kept clean and replaced frequently to ensure proper unit operation and efficiency. Never operate the unit without a filter.
Heat Exchanger Cleaning: If soot or scale builds up, the heat exchanger must be cleaned by qualified personnel. This involves disconnecting gas and electrical components, removing the combustion blower and collector pan, and using a wire brush and vacuum to clean the exchanger tubes.
Burner Cleaning: Burners should be inspected for dust or debris and cleaned carefully with a soft wire brush and vacuum cleaner, taking care not to damage the ignitor or flame sensor.
Coil and Drain Maintenance: Inspect and clean the condensate drain and outdoor coil at the beginning of each cooling season, removing debris and cleaning with mild detergent and water.
Electrical Connections: Inspect electrical connections for tightness at the beginning of each heating and cooling season.
Blower Compartment: Clean the blower compartment monthly during heating and cooling seasons to remove dirt and lint accumulation.
Annual Inspection: A qualified serviceman should annually inspect and clean the heat exchanger, vent system, and burners to ensure continued safe operation and identify any deterioration.
Refrigerant Charging: Units are factory-charged with R-410A. If repairs necessitate evacuation and charging, it must be performed by qualified, trained personnel using appropriate tools and procedures. Do not mix refrigerants or charge with a refrigerant not listed on the unit rating label.