21
of
46
Subject to change without prior notice
INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
FIRE PUMPS - NF-VTP SERIES
Ref. No. NFVTP-IOM/
2016
/V.
02
5.16. Pressure Setting
Pressure setting shall be done as described below.
a. The jockey pump shall be stopped automatically at a point equal to the pump churn pressure plus the minimum
static supply pressure.
b. The jockey pump start point should be at least
10
psi (
0.68
bar) less than the jockey pump stop point.
c. The primary fire pump start point should be
10
psi (
0.68
bar) less than the jockey pump start point.
d. The secondary fire pump start point should be
10
psi (
0.68
bar) less than the primary fire pump start point.
e. Fire pumps shall be stopped manually.
5.17. Pipes & Fittings material of construction
SL. NO.
DESCRIPTION
SIZE
MATERIAL
1
Discharge line
As per NFPA
20 (refer table
4.26(a), 2010 edition)
.
Mild steel
2
Sensing line
½
” (
15
mm)
Brass, rigid copper, stainless steel
3
Diesel fuel inlet
½
” (
15
mm)
Black steel or stainless steel piping
4
Engine exhaust line
As per diesel engine manufac-
ture recommendation
Mild steel
5
Engine cooling line outlet
Outlet size higher than inlet
Mild steel
6
Pressure relief valve outlet
As per NFPA
20 (refer table
4.26(a), 2010 edition)
.
Mild steel
7
Concentric increaser
As per pump discharge flange
and above mentioned discharge
line size.
Mild steel
8
Test line header
As per NFPA (refer para
20
4.20.3.4., 2010 edition)
Mild steel
3.
Ensure that the battery terminals are tight.
4.
Each engine shall be provided with two battery units.
5.
Current-carrying parts shall not be less than
12
in. (
305
mm) above floor level.
6.
Storage batteries shall be readily accessible for servicing.
7.
Battery cables shall be sized in accordance with the engine manufacturer’s recommendations considering the
cable length required for the specific battery location.
8.
Batteries should be connected in proper polarity.(+ve & -ve terminals)
