Step 5 -- Select And Install - Payne PA1Z030 Installation, Start-Up And Service Instructions Manual

V. STEP 5 -- SELECT AND INSTALL DUCTWORK
The design and installation of the duct system must be in
accordance with:
• the standards of the NFPA (National Fire Protection
Association) for installation of nonresidence type air con
ditioning and ventilating systems;
• NFPA 90A or residence-type, NFPA 90B; and/or local codes
and residence-type, NFPA 90B;
• and/or local codes and ordinances.
Select and size ductwork, supply-air registers and
return air grilles according to ASHRAE (American Society of
Heating, Refrigeration, and Air Conditioning Engineers) rec-
ommendations.
Use the duct flanges provided on the supply and return air
openings on the side of the unit. See Fig. 2 4 for connection
sizes and locations. The 14tin. round duct collars (size 024-
048 units) are shipped inside the unit attached to the indoor
blower. They are field-installed and must be removed fl'om
the indoor cavity prior" to start up, even if they are not used
for" installation.
A. Install Flanges for Ductwork Connections (PAIZ060 Only)
The PA1Z060 units are shipped with flanges which must be
field-installed on the unit.
To install unit flanges:
1. Five pieces of flange are shipped on the return air open
ing of the unit. Remove the flanges from the shipping
position. See Fig. 5. Screws are field-supplied.
2. One piece of flange is used as it is shipped (straight).
Bend the other 4 pieces at right angles.
3. Install the straight flange on the right side of the
return air opening in holes provided. See Fig. 6. Flanges
should stick out from unit to allow for connection of
ductwork.
4. Install 2 hand formed flanges onto return air opening
in holes provided to form a rectangle around the return
air opening.
5. Install remaining 2 hand-formed flanges around dis-
charge air opening in holes provided.
6. Ductwork can now be attached to flanges.
When designing and installing ductwork, consider the
following:
• All units should have field-supplied filters installed in the
return-air side of the unit. Recommended sizes fox"filters
are shown in Table 1.
• Avoid abrupt duct size increases and reductions. Abrupt
change in duct size adversely affects air performance.
IMPORTANT:
Use flexible connectors between ductwork and
unit to prevent transmission of vibration. Use suitable gas-
kets to ensure weathertight and airtight seal.
• Size ductwork for cooling air quantity (cfln). The mini-
mum air quantity for proper electric heater operation is
listed in Table 2. Heater limit switches may trip at air quan-
tities below those recommended.
HAND FORM
STRAIGHT PIECE
Fig. 6 -- Flanges Installed on PAIZ060 Units
/
/
/
FIVE PIECES OF DUCT
FLANGE ATTACHED
HERE FOR SHIPMENT
Fig. 5 -- Shipping Location of Duct Flanges
(Size 060 Only)
Fig. 7 -- Area Not to be Drilled More than 3/4-in.
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