13
Fig. 11 — 42SMA Furred-In Stack Mega Dimensions (Sizes 14-20)
SMA
SMA
Control Box Option with E Heat
4-Pipe panel shown.
NOTE: Risers removed for clarity.
Standard heights and widths
shown for riser penetration.
See Note 10.
Side panel dimmed for clarity.
6-5/8
[168]
6-5/8
[168]
3
[76]
3
[76]
1
[26]
11
[279]
24 [610]
3
[76]
28 [710]
30 [762]
24 [611]
66
[1674]
5
[127]
1-1/2
[38]
9
[229]
3.00
[76.2]
39
[991]
3-1/2
[88.9]
LEGEND
CR — Cold Water Return
CS — Cold Water Supply
D — Drain
HR — Hot Water Return
HS — Hot Water Supply
R — Return
S — Supply
NOTES:
1. Units are fabricated of galvanized steel with a 16 gauge galvanized fan deck.
2. All risers are insulated.
3. Thermostats shipped loose for field installation.
4. Risers are factory piped to coil with valves as specified.
5. Blower, motor, valves, coil, and filter are accessible through the return air opening.
6. Unit and control box are insulated.
7. Riser length = {floor to floor + 2 in. [51 mm}. Maximum riser length is 119 in. [3023 mm].
8. Maximum riser size is 2-1/2 in. [64 mm] diameter. If larger sizes are required, please consult
the factory.
9. Expansion loops in hot water heating circuits are required.
10. Slots provided in the back panel for coil connection to permit expansion and contraction of ris-
ers. Coil connections to be at the center of the slots.
11. See unit Arrangements for supply and return air orientation.
12. Dimensions are in inches, dimensions in [ ] are in millimeters.
ITEM DESCRIPTION
1 1 [25] Flanged Supply Air Opening
2 Filter, Throwaway, 1 [25]
3 Control Box Hinged with Slam Latch
4 Electrical Knock Outs
5 Coil 1/2 in. [13] O.D.
6 Drain Pan
7 Flex Drain Tube/P-Trap
8 Motor/Blower Housing
9 Return Air Opening
10 RA Acoustical Service Panel
11 Riser, Supply, and Return
12 Riser, Drain
13 Isolation Ball Valves
14 Strip Heater (Optional E Heat)
15 Heat Limit Switch (Optional E Heat)
16 Disconnect Switch
17 Optional 22 in. Supply Plenum
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