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GR4GM - 150/180 Series High Efficiency
Installation Instructions
Single Package Gas Heating/Electric Cooling Rooftop Units
!
WARNING:
Improper installation, adjustment, alteration,
service, or maintenance can cause injury or
property damage. Refer to this manual. For
assistance or additional information consult
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.
DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
These instructions are intended primarily to assist qualified individuals experienced in the proper installation of this
appliance. Some local codes require licensed installation/service personnel for this type of equipment. Read all
instructions carefully before starting the installation.
Model GR4GM-150/180 Shown
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.
•
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.
•
Extinguish any open flame.
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Related Manuals for Nortek GR4GM-150 Series
Summary of Contents for Nortek GR4GM-150 Series
- Page 1 GR4GM - 150/180 Series High Efficiency Installation Instructions Single Package Gas Heating/Electric Cooling Rooftop Units Model GR4GM-150/180 Shown WARNING: WHAT TO DO IF YOU SMELL GAS: Improper installation, adjustment, alteration, • Do not try to light any appliance. service, or maintenance can cause injury or •...
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Page 3: Table Of Contents
TABLE OF CONTENTS GENERAL SPECIFICATIONS ........4 START-UP PROCEDURE .......... 14 • Air Circulation ............. 14 SAFETY CONSIDERATIONS ........4 • System Cooling ..........15 • Literature, Labels, and Tags ........4 • System Heating ..........15 • Pressures Within The System ....... 4 •... -
Page 4: General Specifications
GENERAL SPECIFICATIONS Equipment Check — All units have been securely packaged at the point of shipment. After unpacking the unit, carefully inspect it for apparent and concealed GR4GM Series Single Package Gas Heating/Electric damage. Claims for damage should be filed with the Cooling units are designed for outdoor rooftop or ground carrier by the consignee. - Page 5 GR4GM-150/180 SERIES – PHYSICAL DATA Dimensions shown in inches (mm) 93 (2362) CORNER "A" 85 (2159) 38.75" INDUCER/BURNER 4 (102) TYP VENT HOOD ASSY 4 (102) TYP CORNER "B" 41.25" CONDENSER FANS (3) 79 (2007) 87 (2210) CONDENSER COIL HEAT EXCHANGER TOP VIEW CORNER "C"...
- Page 6 GR4GM-150/180 SERIES – PHYSICAL DATA Dimensions shown in inches (mm) BLOWER ASSEMBLY BLOWER MOTOR MANUAL FRESH ELECTRICAL SUPPLY AIR PANELS ENTRIES 3 (76) 115V GFCI HORIZONTAL RETURN CONDENSER COIL 5.5 (140) AIR OPENING 15.5 (394) 18 (457) 3 (76) 66 (1676) 11 (279) 8.5 (216) 4 (210)
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Page 7: Clearances To Combustible Materials
A vent cover assembly has been supplied with the unit. Clearances to Combustible Materials — See Figure 3 for required clearances to combustible materials. Refer It can be found secured to the gas controls within the to the unit data label for the model number. control panel area of this unit. -
Page 8: Unit Installation
through the base rail using a straight length of 3/4” pipe WARNING! equipped with a 3/4” threaded male fitting. Once installed the drain must be equipped with a 3” (8 cm) Min. trap This product contains fiberglass wool. Disturbing between the drain line and an open vent of the same the insulation of this product during installation, size for proper condensate removal. -
Page 9: Rigging And Hoisting
WARNING: LIFTING CABLE OR CHAIN Do not place combustible material on or against BEAM the unit cabinet. Do not place combustible materials, including gasoline and any other SPREADER flammable vapors and liquids, in the vicinity SPREADER of the unit. GR4GM unit clearances must be in accordance with those shown in Figure 3. -
Page 10: Circulating Air Supply
To maximize heat exchanger life, the combustion air This unit is designed only for use with a supply and return must be free of chemical contaminants which form duct. Any exterior ducts, joints, or openings in the building corrosive acidic compounds when combusted. Some roof or walls must be weatherized with conventional examples of these chemical contaminants are chlorine, flashing and sealing compounds. -
Page 11: Gas Supply And Piping
IMPORTANT NOTES: GAS SUPPLY AND PIPING Gas piping must not be run in or through air ducts, This unit has right side gas entry. A typical gas service chimneys, gas vents, elevator shafts, etc. hookup is shown in Figure 5. When making the gas Compounds used on threaded joints of gas piping connection, provide clearance between the gas supply line must be resistant to the actions of liquefied petroleum... -
Page 12: High Altitude De-Rate
WARNING: High Altitude De-Rate — The nameplate input rating for the units apply for elevations up to 2,000 feet (610m) To avoid the risk of electrical shock, personal above sea level. For elevations above 2,000 feet the input injury, or death, disconnect all electrical rating must derate by 4% per 1,000 feet. -
Page 13: Blower Speed
To install the thermostat: WARNING: 1. Position the subbase on an inside wall and mark the mounting holes and thermostat cable openings. The unit cabinet must have an uninterrupted 2. Cut out the cable opening and route the thermostat or unbroken electrical ground to minimize cable from the unit’s low voltage compartment to personal injury if an electrical fault should occur. -
Page 14: Electrical Data Table
Orifice Size Unit Type Heating Model Input Elevation Number Fuel (BTU/HR.) Burners 0-2000 2000-4000 4000-6000 6000-7000 GR4GM -XXX* 180C Nat. 180,000 1/8” 2.90 mm 153,000 GR4GM- XXX* 270C Nat. 270,000 1/8” 2.90 mm 230,000 GR4GM- XXX* 315C Nat. 315,000 1/8” 2.90 mm 268,000 Table 2. -
Page 15: System Cooling
System Cooling blower speeds will increase the temperature rise and higher Set the thermostat system switch to “Cool” and the blower speeds will decrease the temperature rise. thermostat fan switch to“Auto.” Lower the thermostat temperature switch below room temperature and The unit is equipped with an adjustable motor sheave. -
Page 16: Component Functions
COMPONENT FUNCTIONS Refrigerant Charging — The R4 packaged gas/electric units are fully charged at the factory. The system refrigerant charge can be checked and adjusted through the service Flame Sensor — The flame sensor acts to prove that ports provided behind the service panel. Use only gauge flame has carried over from the ignitor to the right-most burner. -
Page 17: Routine Maintenance
Blower Bearing Lubrication — This blower unit is Routine Maintenance — Proper maintenance is important equipped with three support bearings and one pillow block to achieve optimum performance from the air conditioner. drive bearing. The three ball bearings are sealed cartridge The ability to properly perform maintenance on this units and considered permanently lubed with no further equipment requires certain mechanical skills and tools. -
Page 18: Cleaning Of Burners
10. Replace all the parts in reverse order from which they 6. Remove the four screws that hold the burner assembly in place and remove the burner assembly. BE were removed. EXTREMELY CAREFUL NOT TO DAMAGE THE 11. Follow the lighting instructions found on the right side IGNITOR OR FLAME SENSOR WHILE REMOVING door to return the unit to operation. -
Page 19: Unit Fails To Operate
5. The flame must be proven through the flame sensor If the unit does not operate properly in the heating mode, be certain to check the following: in seven seconds to hold the gas valve open. The integrated control will monitor the gas flame with the The thermostat is operating properly. -
Page 20: Specifications/Electrical Data
SPECIFICATIONS AND ELECTRICAL DATA Model R4GM- 150C180C 150D180C 150C270C 150D270C 180C270C 180D270C 180C315C 180D315C Performance Heating Input BTUH (High)-Nat. 180,000 180,000 270,000 270,000 270,000 270,000 315,000 315,000 Heating Output BTUH (High)-Nat. 144,000 144,000 216,000 216,000 216,000 216,000 252,000 252,000 Heating Input BTUH (Low)-Nat. 117,000 117,000 175,000... -
Page 21: Lighting Instructions
POUR VOTRE SÉCURITÉ. FOR YOUR SAFETY READ À LIRE AVANT L’EMPLOI BEFORE OPERATING ATTENTION! L’inobservation de ces instructions WARNING: If you do not follow these instructions peut entraîner un incendie ou une explosion pouvant exactly, a fi re or explosion may result causing property causer des dam mages à... -
Page 22: Wiring Diagrams
Figure 8A. Typical Wiring Diagram - 150/180 Series... - Page 23 Figure 8B. Typical Wiring Diagram - 150/180 Series...
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Page 27: Accessories, Replacement Parts
ACCESSORIES NORDYNE GR4GM GR4GM Part# Description -150 -180 555617 Hinged Roof Curb 8” High - K/D 555618 Hinged Roof Curb 14” High - K/D 555619 Hinged Roof Curb 18” High - K/D (Special Order) 555620 Hinged Roof Curb 24” High - K/D (Special Order) 555621 Economizer - Modulating w/ Relief, Adapts Horizontal 555622... - Page 28 Supply Air Temperature: ____________ (°F) Return Air Temperature: ____________ (°F) Temperature Rise: _________________ (°F) Specifications & illustrations subject to change without notice or incurring obligations (08/15). O’Fallon, MO, © Nortek Global HVAC LLC 2015. All Rights Reserved. 708342C (Replaces 708342B)
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