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--=:::::FFÂ¥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