York XT AHU - ENERGY RECOVERY WHEEL OPERATION AND TEMPERATURE LIMITS

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JOHNSON CONTROLS

FORM 102.20-OM2

ISSUE DATE: 6/01/2015

SECTION 2 - START-UP AND OPERATION

FIGURE 22 - HORIZONTAL WHEEL FOR OUTDOOR AHU

LD09641a

Elevation View

Plan (Top) View

Supply Fan

Cooling

Coil

Cooling

Coil

Heating

Coil

Heating

Coil

Filter

AccessAccess

Engery

Wheel

Engery

Wheel

O/A Damper

Return Air

R/A Damper

O/A

Bypass

E/A Bypass

O/A Damper

Exhaust Fan

When the AHU is operating normally or

temporarily, the energy recovery wheel

must rotate to prevent clogging.

Many energy recovery wheels are sus-

ceptible to damage if the AHU reaches a

maximum temperature, which can occur

if the heating valve remains open when the

AHU is off. The maximum temperatures

across energy recovery wheels:

1. Thermotech - 140°F

2. Innergy Tech - 122°F

3. NovelAire

Technologies - 200°F

4. Airxchange

- 170°F

Main Page

Table of Contents5
Section 1 - General Information and Safety13
- Introduction13
- About this Manual13
- Warranty13
- Responsibility for Safety13
Section 2 - Start-Up and Operation15
- Before Start-Up15
- Operation50
Section 3 - Maintenance53
- General Requirements53
- TABLE 11 - Minimum / Maintenance Requirements According to ASHRAE53
- Inspect Parts54
- Fan Segment (Supply, Return or Exhaust)55
  - Removing the Fan55
  - Checking the Fan55
- Operating Adjustable Motor Base55
- Aligning Sheaves57
- Belt Replacement Tensioning and Sheave Alignment for Top Mount58
- FIGURE 48 - Alignment Using Straight Edge58
- FIGURE 49 - Alignment Using String58
- FIGURE 50 - Sheave Angular Misalignment59
- FIGURE 51 - Motor Base Lowered59
- FIGURE 52 - Sheave Angular Alignment59
- Lubrication60
- Checking Condition of Extended Lubrication Lines61
- Recommended Lubricant for Bearings61
- Proper Interval and Quantity61
- FIGURE 57 - Split Bearing (Assembled)61
- FIGURE 58 - Optional Lubrication Lines61
Lubricating the Fan Segment and Motor62
- TABLE 12 - Fan Bearing Re-Lubrication Intervals for Ball Bearing Pillow Blocks62
- TABLE 13 - Fan Bearing Lubrication Intervals for Spherical Roller Bearing Solid Pillow Blocks62
- TABLE 14 - Fan Bearing Lubrication Intervals for Spherical Roller Bearing Split Pillow Blocks62
- TABLE 15 - Fan Bearing Lubrication Intervals for Dodge ISN Bearings62
- Checking Condition of Mounting Hardware, Adjustable Motor Base and Motor63
- Checking Electrical Connections63
- FIGURE 59 - Open Drip Proof (ODP) Motor63
- FIGURE 60 - Totally Enclosed Fan Cooled (TEFC) Motor63
- Keep Motor Bearing Lubricated63
UVC Emitter Lamps64
- TABLE 16 - Motor Bearing Lubrication Intervals64
- TABLE 17 - Motor Bearing Service Conditions64
- TABLE 18 - Motor Bearing Lubrication Interval Multiplier64
- Three Types of Lamps65
Maintaining and Replacing Filter Segments65
- FIGURE 61 - UV Lamps65
- FIGURE 62 - Installing V-Mod Lamp65
- FIGURE 63 - Installing V-Ray and V-Max Grid Lamps65
- FIGURE 64 - V-Max Grid Lamps65
- FIGURE 65 - Typical Filter Types65
- Replacing the Filters66
Economizer Segment (Dampers)66
- Cleaning Procedure66
- Hardware Check66
Coil Segment Cleaning66
- Tools, Equipment and Materials66
- FIGURE 66 - Installing Angle Filters66
- FIGURE 67 - Installing Side Load Filters66
- Cleaning Procedure67
Condensate Drain Pan, Trap and Line Cleaning67
- Tools, Equipment and Materials67
- Schedule and Conditions67
- Cleaning Procedure68
- Coil Freeze Protection68
Energy Recovery Wheel68
Airxchange68
- Tools and Materials68
- Cleaning the Wheel69
- Adjusting Air Seals69
- FIGURE 68 - Rinse Segments69
- FIGURE 69 - Diameter Seal Adjustment69
- Inspect Wheel Drive Components70
Novelaire ® Technologies70
- Cleaning the Wheel70
- FIGURE 70 - Airxchange ® Energy Recovery Wheel with Bearing Support Beam Side70
- Adjusting Air Seals71
- Inspect Wheel Drive Components71
- How to Measure, Assemble and Install71
- FIGURE 71 - How to Measure71
- FIGURE 72 - Disassembly71
- FIGURE 73 - Assembly71
Thermotech72
- Cleaning the Wheel72
- Adjusting Air Seals72
- FIGURE 74 - Installation72
- FIGURE 75 - Loosen Screws before Adjusting Seals72
- Inspect Wheel Drive Components73
Innergy Tech73
- Cleaning the Wheel73
- Adjusting Air Seals73
- FIGURE 76 - ERW Seal Locations73
- Inspect Wheel Drive Components74
- FIGURE 77 - Airloop™ Labyrinth Seal Adjustment74
Econo-Disk75
- Maintenance Instructions75
P-Cone75
- Maintenance of P-Cone75
- FIGURE 78 - Plenum Fan Tap Location and Connection Illustration75
- FIGURE 79 - Maintenance Requirements76
Section 4 - Service and Repair77
- Service Tools and Equipment77
- Service Information78
- Troubleshooting78
- Pitot Tube78
- FIGURE 80 - Construction of Pitot Tube78
- FIGURE 81 - Pitot Tube78
- Inclined Manometer79
- Filter Gauge79
- U-Tube Manometer79
- FIGURE 84 - Magnehelic Filter Guage79
- FIGURE 82 - Inclined Manometer79
- FIGURE 83 - Minihelic Filter Gauge79
- Duct Pressures80
- Requesting Assistance81
- FIGURE 87 - Static Pressure Air System81
- Adjusting, Removing, and Installing Sheaves82
Section 5 - Wiring Diagrams87
FIGURE 93 - Full Voltage Starter88
Controls89
- FIGURE 94 - Full Voltage Starter with Single Point Power Connection (204195)90
- Controls91
- FIGURE 95 - Outside Air Damper Kit (Relay Installation)92
- Installing Kit (if Applicable)92
- FIGURE 96 - Solution XT Termination Chart Inside Enclosure Door93
- FIGURE 97 - Typical FPC Wiring Diagram94
- FIGURE 98 - Transformer Enclosure Wiring Detail (Shown Open)96
- FIGURE 99 - Transformer Wiring Diagram97
- FIGURE 100 - UV Control Panel Wiring (8 Amps)99
- FIGURE 101 - UV Control Panel Wiring ( Greater than 8 Amps)100
- FIGURE 102 - Gas Heat, Single Phase, 1500Va Transformer Wiring Diagram102
- FIGURE 103 - Gas Heat, Three Phase, 1000Va Transformer Wiring Diagram103
- FIGURE 104 - Gas Heat, Three Phase, 500Va Transformer Wiring Diagram104
- FIGURE 105 - Typical Wiring Diagram for Electric Heat Control Type Vermier105
- FIGURE 106 - Typical Wiring Diagram for Control Type Full SCR106
Appendix A - Start-Up Checklist107
Appendix B - Long-Term Storage111
- Temperature116
- TABLE 21 - si Metric Conversion116

York XT AHU - ENERGY RECOVERY WHEEL OPERATION AND TEMPERATURE LIMITS

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