LLC. Air Handler Unit Installation & Operations Manual

ManualsBrandsHeatcraft Refrigeration Products ManualsBlower4346B001

Bulletin H-IM-71A

Part No. 4346B001

August 2002

(Replaces H-IM-71, August 1996)

Coil Stacking ........................................................................................ 5

Condensate Drain Traps .......................................................................

Direct Expansion Coils .........................................................................

Filter Quantities ....................................................................................

Freezing Temperatures ........................................................................

Inspection ............................................................................................

Installation ...........................................................................................

Internal Isolation ..................................................................................

Maintenance ........................................................................................

Motors & Drives ...................................................................................

Replacement Parts ...............................................................................

Section Assembly .................................................................................

Shipment of Sections ...........................................................................

Start-up ................................................................................................

Steam Coils ...........................................................................................

2, 3

Water Coils ...........................................................................................

Weights ................................................................................................

Air Handler Unit

Installation & Operations Manual

TABLE OF CONTENTS

Summary of content (8 pages)

PAGE 1
Bulletin H-IM-71A Part No. 4346B001 August 2002 (Replaces H-IM-71, August 1996) Air Handler Unit Installation & Operations Manual TABLE OF CONTENTS Coil Stacking ........................................................................................ 5 Condensate Drain Traps ....................................................................... 4 Direct Expansion Coils ......................................................................... 3 Filter Quantities............................................
PAGE 2
Inspection Shipment should be checked against the bill of lading to verify that all items listed have been received. All parts should be carefully inspected to determine if any damage was incurred in shipment. Any shortage and/or claims for damage should be immediately reported to the delivering carrier followed by ﬁlling a claim for shortages and/or damages. Shipment of Units Depending on the unit size and accessories included, the shipment may be made in two or more sections.
PAGE 3
When two or more steam coils are furnished in a unit, provide separate traps for each coil. Size traps with ample capacity using the maximum heating load and service factor recommended b y the trap manufacturer. Select control valves in accordance with the recommendations of the control manufacturer using actual heating loads. Install suitable strainer ahead of all automatic valves and traps to catch dirt and scale. Provide adequate air vents to expel air and other non-condensable.
PAGE 4
Start-Up Make sure all bolts and screws are tight. Remove tagged shipping tie-down bolts and spacers from the fan and motor assembly before start-up. (Internally isolated units only.) Check the sheaves to see if they are alignment and make suer the set screws are tight. Make sure that the dimension across the top is equal on all grooves, otherwise excessive belt wear will result. Check for proper rotation of the blower pulley.
PAGE 5
Typical ‘Accessory-to-Coil-Section’ and ‘Accessory-to-Accessory’ Attaching Method 5
PAGE 6
Water Coils Exposed to Freezing Temperature Water coils exposed to freezing temperatures must be protected from freeze-up by either adding anti-freeze solution to coils or proper draining of the coils. The coils are circuited so that there are no trapped circuits. However, because of the serpentine nature of the circuiting, it is almost impossible to adequately drain the coils by gravity alone.
PAGE 7
Large Coils Other Accessories Filter Section Fan and Coil Section Air Handler Component Section Model ID Description S Short S Short L Long L Long V Vertical HD Heating Duty HD Heating Duty FO Fan Only FO Fan Only Fan FC AF FC AF FC FC AF FC AF 03 290 – 318 – 296 170 – 162 – Flat -TA & Pleated 2” 60 Flat -Permanent 2” 66 Flat -Pleated 4” 75 High Capacity -TA & Pleated 149 High Capacity -Permanent 155 High Efﬁciency- 21” Section 82 High Efﬁciency- 28” Section 103 High Efﬁciency- 44” Section 127 Econom
PAGE 8
Quantity and Dimensions of Filters for: Flat Filter Section Filter Dimensions 2” x 16” x 20” 2” x 20” x 20” 2” x 16” x 25” 2” x 20” x 25” 03 1 1 – – 06 – – – 2 08 2 – 2 – High Capacity Filter Sections 2 – – 2” x 16” x 20” 2 – – 2” x 20” x 20” – – 6 2” x 16” x 25” – 4 – 2” x 20” x 25” High Efﬁciency Filter Sections 24” x 24” 12” x 24” 1 1 2 – 2 2 10 12 – – 2 4 2 3 – – 4 – 3 3 – – Air Handler Unit Size 14 18 20 26 34 41 50 65 75 4 10 4 10 Filter Dimensions 2” x 16” x 20” 2” x 20” x 20” 2”