Installing Outside And/Or Supply Air Duct Collars; Step 5 - Piping Installation; Piping Insulation - Carrier AirStream 42WKN08-36 Installation, Operation And Maintenance Instructions
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INSTALLING OUTSIDE AND/OR SUPPLY AIR DUCT
COLLARS
1.
Refer to the dimensional drawings (Fig. 2-4 to for knock-out
hole locations.
2.
The insulation is pre-cut to aid location and removal of the
relevant section. Rub hand across surface of insulation to
reveal exact location of knock-out.
3.
Remove the metal knockout from the chassis.
4.
Place the duct collar's tabs inside the duct collar flange's
opening. Bend the tabs around the duct collar flange's
opening.
5.
Using field provided self-tapping screws, attach the duct
flange and collar to the chassis with the bent tabs being sealed
in between the unit chassis and duct collar flange.
See Fig. 43 for duct collar assembly.
UNIT CHASSIS
DUCT COLLAR FLANGE
DUCT COLLAR
Fig. 43 — Duct Collar Assembly
NOTE: See Fig. 2-4 for branch duct and fresh air duct locations
and dimensions.
Step 5 — Piping Installation
CAUTION
•
Units not approved for use in potable water systems.
•
Hot water supplied to the hot water heating option must
not exceed 200ºF (93°C) temperature or 125 psig
(862 kPa) pressure.
ATTENTION
•
Ces unités ne sont pas approuvées pour l'usage dans
des systèmes à eau potable.
•
La température de l'eau chaude alimentée en vertu de
l'option de chauffage de l'eau chaude ne doit pas
dépasser 200°F (93°C) ou une pression de 125 lb/po²
(862 kPa).
OUTSIDE AIR KNOCKOUT
44
IMPORTANT:
•
No water-flow can cause a freeze condition resulting in
damage to the coil.
•
Never leave the unit filled with water in a building
without heat unless antifreeze has been added.
IMPORTANT:
•
L'absence d'écoulement d'eau risque de causer une
condition de gel et d'endommager le serpentin.
•
Ne laissez jamais l'appareil rempli d'eau dans un
immeuble non chauffé sans lui ajouter de l'antigel.
1.
Branch piping to and from the unit should include swing
joints to allow for expansion and contraction of the piping
without placing a strain on the unit coil.
2.
Install pipe unions and shutoff valves in lines to and from
each coil to allow maintenance or replacement of unit
without shutting down and draining entire system. See
Fig. 44.
3.
Include a circuit setter in return line for water flow
regulation.
4.
A drain valve (hose bib) should also be provided for each
coil line to allow removal of water from the coil if located
in an area subject to freezing.
5.
It is advisable to use a pipe line strainer before each coil.
6.
Provide adequate pipe hangers, supports, or anchors to
secure the piping system independently of the unit.
7.
On 2-pipe systems with microprocessor controls, install
the factory-provided Changeover Sensor on the main sup-
ply water line upstream from the unit where water main-
tains flow. This ensures accurate readings of water
temperature. Wire extension and a plug are included.
AIR VENT
UNION
UNION
HOT/CHILLED
2-WAY
WATER COIL
CONTROL VALVE
HOSE BIB DRAIN
Fig. 44 — Installing Piping
PIPING INSULATION
Chilled water and condensate pipes should be insulated right up to
the unit chassis to prevent condensation, which can damage the
ceiling and objects located below the piping. Chilled water valves
must also be insulated to prevent sweating.
SHUT-OFF
STRAINER
VALVE
SUPPLY
CIRCUIT
SHUT-OFF
UNION
SETTER
VALVE
RETURN
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