Page 52 - Webster Service Manual

47
IMPORTANT:
Do not loosen or try to tighten any pump
plugs not to be used in the installation. NON-HARDEN-
ING OIL PIPE DOPE IS RECOMMENDED for use on
the threads of all fittings. Paste must be used with care
to prevent deposits on critical internal areas of the
pump damage. Do not use teflon tape. EVIDENCE OF
TEFLON TAPE USE WILL BE CAUSE TO VOID WAR-
RANTY.
Installation Notes:
If the pump doesn't work, check for air leaks.
If you're experiencing the following problems;
poor cutoff, noisy operation, erratic fire, check for
air leaks.
Return line must be submerged
Check all fittings
Check all joints
Check optional inlet plugs
DO NOT use compression fittings
90%
of start-up problems are due to air leaks in the suc-
tion line . . . so check
and double check
for air
leaks.
Fuel unit inlet pressures should not exceed 3 psig in
order to comply with National Fire Protection
Association's Bulletin 31.”
Nozzle port pressure at cutof f is not less than 80% of
set pressure unless unit has blank nozzle or pump code
ends in 13 or 14 (no cutoff).
To assure maximum performance, INLET VACUUM,
measured at unused INLET PORT, should not exceed
10”
Hg on single-stage pumps or 15” Hg on two-stage
pumps.