PEERLESS SERIES PSC - Page 28

TO 1/8 BRASS TO FAN
TUBE FITTING HOUSING
ON GAS VALVE PRESSURE TAP
LOW NED
PRESSURE TAP
NEG
1/8 TEST TEE-
\
1/8 TEST TUBING
TO I/8 go"
NYLON ELBOW
ON LEFT S_DE
OF AIR BOX
DIFFERENTIAL PRESSURE SWITCH
INCLINEDo- 2" MANOMETERw.C. SCALE _
MINIMUM SUCTION PRESSURE: -45" WATER COLUMN
Figure 22: Measuring Fan Suction Pressure
25