Greenheck Fan 470656 Table of Contents, Clearance to Combustibles / Service Clearances, Start-Up

3.After storage period, purge grease before putting fan into service.

Indirect Gas Fired Unit Installations

Units are listed for installation in the United States and Canada.

•Installation of gas fired duct furnaces must conform with local building codes. In the absence of local codes, installation must conform to the National Fuel Gas code, ANSI Z223.1 or in Canada, CAN/ CGA-B149 installation codes.

•All electrical wiring must be in accordance with the regulation of the National Electrical Code, ANSI/ NFPA 70.

•Unit is approved for installation downstream from refrigeration units. In these conditions, condensate could form in the duct furnace and provision must be made to dispose of the condensate.

Table of Contents

Installation

Clearance to Combustibles/Service Clearances. 3

Indoor Unit			4
Unit Arrangement DB / HZ	. . 4-5
Roof Mounted Unit – Arrangement DBC. .	. . 5-6
Optional Evaporative Cooling Module.. . .	.	.	7
Venting – Outdoor	.	.	. 7
Indoor, All Units			8
Standard Indoor . . . . . . . . . . .9
Concentric, General	.	.	.10
Concentric, Horizontal	.	10-11
Concentric, Vertical		11-12
Two Pipe, Horizontal			13
Two Pipe, Vertical	.	.	.14
Electrical Wiring . . . . . . . . . . . . . 15-16
Gas Piping. . . . . . . . . . . . . . . . .17
Optional Evaporative Cooler Piping . . . .		18-19
Optional Water Wizard™	.	19-20
Optional Direct Expansion (DX) Coil Piping. 20-21
Optional Chilled Water Coil Piping			22
Optional Building Pressure Control. . . .	.	.	.22

Start-Up

Blower. . . . . . . . . . . . . . . . . 23-24

Furnace – All Units	.	. 25
Single Stage		25
2:1 Staged. . . . . . . . . . . . 26
8:1 Staged. . . . . . . . . . . 26-28
2:1 Modulation		29
4:1 Modulation	30-31
Optional Economizer . . . . . . . . . . . . 32
Optional Evaporative Cooling		33
Optional Water Wizard™	34-35
Operation
Optional Water Wizard™	.	.35
Optional VAV Units	.	. 36
Optional Recirculating Units		37

®

Sequence of Operation, Furnace –

2:1 Staged . . . . . . . . . . . . . . .38 2:1 Modulation. . . . . . . . . . . . 39-40

Operation of Controller –

4:1 Modulation/8:1 Staged Controller. . 40-41 Sequence of Operation, Furnace –

4:1 Modulation. . . . . . . . . . . . 41-42 8:1 Staged . . . . . . . . . . . . . 43-44 Ignition Controller. . . . . . . . . . . . . .44 Economizer. . . . . . . . . . . . . . . . 45

Troubleshooting

Blower. . . . . . . . . . . . . . . . . . 46

Motor Over Amps	. . . .		.	.47
Insufficient / Too Much Airflow	. . .			48
Excessive Noise / Vibration. . . .	. . .	.	.	.49
Furnace – Staged	. . . .		.	.50
2:1 Modulation	. .			51
4:1 Modulation			52-53
8:1 Staged. . . . . . . . . . . 54-55
Optional Evaporative Cooling	. .			56
Optional Water Wizard™	. . .	.	.	.57

Maintenance

Routine . . . . . . . . . . . . . . . . 58-59 Fall. . . . . . . . . . . . . . . . . . 60-61

Reference

Vent Connections . . . . . . . . . . . . . .62

Model IG – Single or 2 Stage	.	.	63
8:1 Staged . . . . . . . . . . . .64
2:1 Modulation	.	.	65
4:1 Modulation	.	.	66
Model IGX – Blower Control Center			67
Single or 2 Stage	.	.	68
8:1 Staged . . . . . . . . . . . .68
2:1 Modulation	.	.	69
4:1 Modulation	.	.	69
Performance Table . . . . . . . . . . . . . 70
Start-Up Checklist			71

Maintenance Log . . . . . . . . . . Backcover Warranty . . . . . . . . . . . . . . Backcover

Clearance to Combustibles / Service Clearances

	Floor	Top	Sides	Ends
Indirect Fired	0 inches	0 inches	0 inches	0 inches
Units*	(0 mm)	(0 mm)	(0 mm)	(0 mm)

Clearance to combustibles is defined as the minimum distance required between the heater and adjacent combustible surfaces to ensure the adjacent surface’s temperature does not exceed 90 degrees above the ambient temperature.

*Reference venting guidelines for combustion blower clearances.

Recommended Minimum Service Clearances

Housing 32	42 inches (1067 mm) on the
and less	controls side of the unit

Clearances for component removal (such as evaporative cooler media) should be 6 in. wider than the width of the module itself.

Model IG / IGX Make-Up Air 3