Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 1 Ð Provide Unit Support . . . . . . . . . . . . . . . 1
·ROOF CURB
·ALTERNATE UNIT SUPPORT
Step 2 Ð Rig and Place Unit . . . . . . . . . . . . . . . . . . 3
·POSITIONING
·ROOF MOUNT
Step 3 Ð Field Fabricate Ductwork . . . . . . . . . . . . 7 Step 4 Ð Make Unit Duct Connections . . . . . . . . 7 Step 5 Ð Install Flue Hood . . . . . . . . . . . . . . . . . . . 7 Step 6 Ð Trap Condensate Drain . . . . . . . . . . . . . 8 Step 7 Ð Install Gas Piping . . . . . . . . . . . . . . . . . . . 8 Step 8 Ð Make Electrical Connections . . . . . . . . 9
·FIELD POWER SUPPLY
·FIELD CONTROL WIRING
Step 9 Ð Make Outdoor-Air Inlet
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
·MANUAL
·OPTIONAL
Step 10 Ð Install
1.Improper installation, adjustment, alteration, serv- ice, or maintenance can cause property damage, per- sonal injury, or loss of life. Refer to the User's In- formation Manual provided with this unit for more details.
2.Do not store or use gasoline or other ¯ammable va- pors and liquids in the vicinity of this or any other appliance.
What to do if you smell gas:
1.DO NOT try to light any appliance.
2.DO NOT touch any electrical switch, or use any phone in your building.
3.IMMEDIATELY call your gas supplier from a neigh- bor's phone. Follow the gas supplier's instructions.
4.If you cannot reach your gas supplier, call the ®re department.
Disconnect gas piping from unit when pressure testing at pressure greater than 0.5 psig. Pressures greater than
0.5psig will cause gas valve damage resulting in haz- ardous condition. If gas valve is subjected to pressure greater than 0.5 psig, it must be replaced before use. When pressure testing
0.5psig or less, a unit connected to such piping must be isolated by closing the manual gas valve(s).
SAFETY CONSIDERATIONS
Installation and servicing of
Untrained personnel can perform the basic maintenance functions of cleaning coils and ®lters and replacing ®lters. All other operations should be performed by trained service personnel. When working on
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have ®re ex- tinguishers available for all brazing operations.
Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury.
INSTALLATION
Step 1 Ð Provide Unit Support
ROOF CURB Ð Assemble or install accessory roof curb in accordance with instructions shipped with this accessory. See Fig. 1 and 2. Install insulation, cant strips, roo®ng, and counter ¯ashing as shown. Ductwork can be installed to roof curb before unit is set in place. Curb should be level. This is nec- essary to permit unit drain to function properly. Unit level- ing tolerance is ± 1¤16 in. per linear ft in any direction. Refer to Accessory Roof Curb Installation Instructions for addi- tional information as required. When accessory roof curb is used, unit may be installed on class A, B, or C roof covering material.
IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket with the roof curb as shown in Fig. 1. Improperly applied gasket can also result in air leaks and poor unit performance.
Instructions continued on page 3.
Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.
Book | 1 |
| PC 111 | Catalog No. | Printed in U.S.A. | Form | Pg 1 | Replaces: | |
Tab | 1a |
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