Carrier 070-08/024070 Installation, Start-Up, Operating And Service And Maintenance Instructions page 18

['_ UPFLOW RETURN AIR CONFIGURATIONS AND RESTRICTIONS
AIR FLOW MODELS RETURN AIR RETURN AmR RETURN AIR
CONNECTION t CONNECTION 2 CONNECTmON 3
ONLY ONLY ONLY
066.060, -22 AND YES YES YES
-20 MODELS
ALL OTHER MODELS YES YES YES YES
UP,LOW
HESTHIcrloNS
Fig. 18--Upflow Return Air Configurations and Restrictions
RETURN AIR
COMBINATmQNS
OF 1,2, AND3
YES
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DOWNFLOWRETURNAIRCONF1GU RATIONSANDRESTRICTIONS
_J _ t AIR FLOW MODELS RETURN AIR RETURN AIR
CONNECTION 1 CONNECTION 2
ONLY ONLY
066.060, -22 AND YES NO
-20 MODELS
ALL OTHER MODELS YES NO NO
suPPLY
AIR
RETURN AIR RETURN AIR
CONNECTION 3 COMBINATIONS
ONLY OF 1, 2, AND 3
NO NO
NO
Fig. 19--Downflow Return Air Configurations and Restrictions
A02163
RETURN
AIRFtOWMODELS i
........................................... J
IIII
li .....
o 2 IIII " _
.... _ IIII
"z_#'" { IIII
j\. orP RMIrr_r?FORi
066,C'_0, -22-0
i AIR F_OW MODELS
.............../'
i i
RE_'URN AIR
_[ORIZOAL* NOTE RESTRICTIONLEFT SAM£ [Q£ _ AIR Rf S[[_IC[IO S
@ | HORIZONTAL RETURN AIR CONFIGURATIONS AND RESTRICTIONS
AIR FLOW MODELS RETURN AIR RETURN AIR RETURN AIR RETURN AIR
CONNECTION 1 CONNECTION 2 CONNECTION 3 COMBINATIONS
ONLY ONLY ONLY OF 1, 2, AND 3
066.060, -22 AND YES NO NO NO
-20 MODELS
ALL OTHER MODELS YES YES YES YES
Fig. 20--Horizontal Return Air Configurations and Restrictions
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A02162