Piper SENECA II - Page 724

387
PIPER SENECA II SERVICE MANUAL
l 0
0
.19 DIA. HOLES
(6 · EQUALLY SPACED)
4.20 ( 3 62 \
OLIA.~\ D;A, /
RUBBER STOPPER
0 0
0
.125 THICK STOCK
---- COMBUSTION HEAD OPENING -----
WING NUT---1
FLAT WASHER -----.=-::.t::::.=::;:::'.J.~
RUBBER STOPPER----,
------ SEAL CAP------
DRILL FOR BOLT---+--i
FLAT WASHER
BOLT--=:::::FF¥r
--- EXPANSION PLUG ---
Figure 13-16. Suggested Design for Seal Plates, Plugs, and Caps for Combustion
Tube Leakage Test
l. WATER MANOMETER
2. OHMMETER
3. NEEDLE VALVE
4. TEE
5. PRESSURE TAP (OPEN)
6. ADJUSTING SCREW
7. COMBUSTION Al R PRESSURE SWITCH
3
4
7
Figure 13-17. Test Setup for Combustion Air Pressure Switch
6
Reissued: 10/11/79
HEATING AND VENTILATING SYSTEM
2K17