NAFFCO NVT 6-115 Owner's manual

INSTALLATION,
OPERATION &
MAINTENANCE
NAFFCO
FIRE PUMPS
VERTICAL TURBINE PUMP
NVT - SERIES
INSTRUCTIONS

DO NOT OPERATE THIS PUMP AT ANY PRESSURE, FLOW
RATE, OR LIQUID TEMPERATURE OTHER THAN THOSE
WHICH SHOWN ON THE NAME PLATE. DO NOT PUMP
ANY LIQUID OTHER THAN WATER. IGNORING THIS
WARNING CAN RESULT IN PUMP FAILURE AND SERIOUS
PERSONAL INJURY OR DEATH.
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INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
1.1. General Safety Instructions
1.2. Electric Hazards
Check proper earth connection of the electric, diesel, jockey controllers and electric motors.
Make sure safety labels and operation labels are stuck in the controllers if damaged please get from NAFFCO and
replace.
Use only qualified personnel for installation and maintenance.
Electric motor cables terminals should be properly terminate and covered with terminal cover.
Inspect cable and connector if any damage replace immediately.
Do not keep tools on top of battery, this could result short circuit.
1.3. Mechanical Hazards
Wear eye protection during welding, grinding, drilling etc. Wear ear protection while operating diesel engine. Always
wear safety shoes and safety gloves.
Monitor water leakage of pump gland packing. If excessive leak adjust the packing, do not place hands or finger into
this area.
During maintenance disconnect battery negative terminal connector.
Do not refuel the engine when its running, fuel fumes are highly flammable.
Diesel engine exhaust pipe line should be insulated from temperature and it should be kept separate from discharge
line.
2. INTRODUCTION
This manual provides general instruction for the installation, operation, maintenance, dismantling and assembling of
vertical turbine fire pump manufactured by NAFFCO, U.A.E.
1. SAFETY
If the safety labels are missed or damaged, contact NAFFCO and get label and replace.
While starting pump set make sure pump set drive shaft guard fixed in the pump set.
Only proper tools of correct size shall be used for maintenance and service.
Do not wear loose clothing that could catch on moving parts.
Pump room should be kept clean from oil, waste cloth, water and easily explosive materials.
Pump room should not be treated a like store room.
Fire pump should be monitored during running to ensure that it was started due to an actual demand and water tank
should be monitored to avoid dry run condition.

Fig. No. 01-a
FORKLIFT
DIESEL ENGINE
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INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
3. IDENTIFICATION
Every pump unit comes out with separate name plate. These name plates have serial number, model, flow rate and head.
It is important that the serial number should be quoted while claiming for spares or service. This will identify the unit
exactly and ensure that correct advice and parts are selected. If it is known that any update or modification to the pump
has been carried out since original supply then this information is also crucial.
4. HANDLING
Pump set shifting and lifting shall be done using forklift or crane or hoist(refer Fig Nos. 01-a, 01-b, 01-c). When lifting
the fire pump set it should be very careful not to broke or bend it. Column and shaft should be supported by suitably
sized timbers while laying on floor. Strainer if fitted on the pump should be removed prior to lifting to avoid using
it as a pivot point during lifting. Only lifting lugs on the discharge head should be used whenever the entire pump is
lifted as an assembled unit.
NAFFCO centrifugal pumps will give trouble-free and satisfactory service for a long time if they are properly installed
and maintained periodically. Follow the instructions in this manual carefully. Do not run the pumps under operating
instructions which differ from those specified by us. Motors, engines, controllers, jockey pump, right angle gear drives,
drive shafts and other accessories are provided with their on individual IOM manuals. They should be consulted in
tandem with the corresponding instructions provided in this manual for all installation, operation and maintenance
activities described herein.

Fig. No. 02
horizontal driver foundation vt pump foundation
base frame
mounting flange
ø20 (4 nos.)
200
(TYP)
200
(TYP)
AA
dia. - ref. catalogue dia. - ref. catalogue
Fig. No. 01-b Fig. No. 01-c
CRANE
COLUMN PIPE
FIRE PUMP
HOIST
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INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
5. INSTALLATION
Fire water pump sets and control systems should be installed in accordance with this IOM maual. Failure to install the
supplied NAFFCO fire pump set fully in accordance with this IOM manual will void the equipment warranty.
Proper ventilation and drainage system shall be provided for fire pump room.
5.1. Foundation
We recommend that you install the pump on a concrete foundation above the water tank which is heavy enough to

Fig. No. 03
horizontal driver foundation vt pump foundation
base frame mounting flangedia. - ref. catalogueø20 (4 nos.)
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INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
5.2. Mounting the pump
Pumps are usually supplied assembled. First clean the discharge head base mounting flange. Inspect the concrete
foundation for dust, dirt, oil, chips water etc. and remove any contaminants. Refer grout manufacturer’s instructions
for cleaning and follow the same. Remove water and/or debris from anchor bolt holes/sleeves also. When using sleeve
type bolts fill the sleeves with packing or rags to prevent grout from entering it.
Fit shackles on the lifting lugs with bolts. Sling through the shackles and hoist the pump into position over foundation.
Shackles and slings should be rated to handle in excess of the pump weight. Lower the pump assembly carefully until
the discharge head is just above the foundation bolts and guide it so that it doesn’t strike the sides of the concrete
foundation opening. Orient the pump so that the discharge nozzle is in the right direction and the holes in the base
provide permanent and rigid support to the entire pump. Foundation area should have adequate space for future
inspection and maintenance activities and should be sufficient enough to provide a solid footing. The foundation must
be capable of absorbing any vibration, normal strain or shock. It should have enough strength to support the complete
weight of the pump including driver related components and weight of the water passing through the pump during
operation.
As a rule of thumb, the weight of the raised concrete foundation should be 2.5times the total weight of these components.
If structural foundations are provided instead of concrete foundation then it should be constructed properly after a
detailed structural strength analysis. The concrete foundation must have an absolutely level and even surface. Make sure
the concrete foundation has set before mounting the pump discharge head and driver base frame by allowing a curing
time of at least 48 hours.
The raised concrete base should be 200 mm larger than the mounting flange and driver base frame on all sides. (See Fig.
Nos. 02 and 03). Pipe sleeves of the foundation bolt should be 2.5times the bolt diameter embedded in the concrete.
Foundation bolt locations should be exactly as shown on the assembly drawing (showing pump, gearbox, drive shaft,
location of bolt holes for discharge head mounting flange and driver base frame) provided by manufacturer.

Fig. No. 04
Fig. No. 05
foundation bolt
grout
dam for grout
sleeve
wedge
foundation
discharge head
mounting flange
dam for grout
precision level
discharge head
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INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
frame (dam) on the foundation enclosing an area around the discharge head base that includes all alignment wedges to
retain the grout between the base mounting flange and the foundation (refer Fig. No. 05). Recommended dam height
is approximately 1/2inch (12 mm). Follow grout manufacturer’s instructions for other grouting procedures and pour
the grouting material into the dammed-in area up to the level of dam and force it between the discharge head and the
mounting flange align with the foundation bolts. Continue to lower the pump assembly until the bolts enter the holes
in the base. Place wedges under the discharge head base mounting flange adjacent to the bolt holes, one under the each
of the four sides. For structural foundations use shims under the corners. Lower the hoist until the full weight of the
pump assembly is resting on the wedges or shims on the foundation.
Remove the slings. Hand tighten the anchor bolt nuts. By adjusting the wedges or shims and nuts on the anchor bolts,
adjust the discharge head flange center line to the correct elevation. While maintaining the correct elevation adjust the
nuts and wedges or shims to achieve the required levelness. Level the pump in two directions at 90° on the machined
top surface of the discharge head (refer Fig. No. 04). The levelness tolerance is 0.005 inches per foot. Build a barrier or

discharge head
Fig. No. 06
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INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
Hollow shaft drive(r) refer to hollow shaft motors or hollow shaft gear drives. Clean the top end thread of the middle
line shaft, and the threads of the coupling. Apply a thin film of oil to the threads. Screw the coupling onto shaft for
half its distance. A fine wire inserted in the drilled hole at the center of the coupling can be used as a gage to
determine when the coupling is correctly positioned.
Be sure to remove the wire after installing the coupling. Upon completion of the installation pump run out should be
checked at the positions indicated in the Fig. No. 6. Attach the base of the dial indicator on the discharge head or driver
support. Place the stylus on the shaft at the locations indicated in Fig. No. 06. Rotate the shaft slowly 360°. Check that
the shaft run out is within 0.06". (1.5 mm) TIR.
5.3. Mounting hollow shaft drive(r)
After finishing the installation of the coupling, inspect the driver mounting flange of the discharge head and clean the
surface thoroughly. Remove the driver top cover cap screws and lift off the cover. Remove the top drive coupling or
clutch and the hold down bolts.
Attach a sling to the lifting lugs of the driver and hoist the driver up. Inspect the mounting surface register and clean
these surfaces thoroughly. Any burrs found on the mounting surface should be removed using a smooth mill file and
clean afterwards. Position the driver above the discharge head. Orient the terminal box of the motor or input shaft of
the right angle gear in the desired position.
Align the driver mounting holes with the respective holes on the top surface of the discharge head. Lower the driver
until the registers engage and the driver firmly rests on the discharge head and secure the driver with the provided cap
screws. Now take top shaft and position it properly over the motor quill shaft. Lower it through the motor quill shaft
to meet the middle line shaft top coupling. Apply a thin film of oil to the threads of the top shaft.
Screw the top shaft into the coupling manually until the resistance is felt. Completely tighten the joint using a pair of
pipe wrenches. Follow the alignment checking procedure described in the section 5.3and ensure the proper alignment.
Lubricate the driver bearings and make the necessary cooling line connections for gear drives. With the motor in place
and top shaft projecting through the driver quill shaft make temporary electrical connections. After removing the
foundation all around. Remove the air bubbles from grout as it is poured by puddling, using a vibrator, or pumping
the gout into place. Level off the grout flush with the top of the dam. Allow the grout to cure at least 48 hours and
after that tighten the foundation bolts.

Fig. No. 07-a
nut cap screw
cover cap screw
adjusting nut
drive coupling
top cover
hold down bolts
gib key
top shaft
rotating ratchet
ratchet ball
stationary ratchet
ball retaining ring
Fig. No. 07-b
nut cap screw
cover cap screw
adjusting nut
clutch
top cover
hold down bolts
gib key
top shaft
ratchet plate
ratchet pin
Hollow Shaft Motor Mounting Components Assembly
Hollow Shaft Gear Mounting Components Assembly
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INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
Disconnect the temporary electrical conncetions before proceeding further. Install the top drive coupling or clutch over
the top shaft. Insert the ratchet pins. In case of ball type ratchet place the ratchet balls and install the rotating half of
the ratchet on top of that and place the ball retaining ring. Match the coupling lugs with corresponding holes in the
motor. Tighten the hold down bolts evenly, ensuring that the driver coupling is properly seated in the register fit.
Insert the gib key into the keyway. Key must fit snugly but with a sliding fit and should have a slight clearance with the
ratchet pin or balls (with rotating half of the ratchet) check the motor rotation. Motor must rotate counter-clockwise
when viewed from the top end. Refer Fig. No. 07-a and 07-b for the details of general arrangement of the driving
mechanism for hollow shaft driver.

Fig. No. 08
l
o
w
e
r
i
m
p
e
l
l
e
r
adjusting nut
r
a
i
s
e
i
m
p
e
l
l
e
r
drive coupling / clutch
r
o
t
a
t
i
o
n
shim liquid level gauge
shim
800 mm (max.)
Fig. No. 09
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INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
Line-up one of the holes in the adjusting nut with the nearest hole in the driver coupling (Fig. No. 08). Insert the cap
screw in the hole and tighten it.
bottom of the keyway. Care should be taken to ensure that the gib key is not too
high so as to hold up the adjusting nut from seating on the drive coupling. Install
adjusting nut to a hand tight.
Shaft adjustment up or down is accomplished by turning the adjusting nut. Before
any adjustment is made, the impellers will be resting on the lateral bowl wear
rings, and considerable resistance due to friction can be felt when turning the
shaft by hand.
To set impellers to the mid position proceed as follows: Turn the adjusting nut in
counter clockwise direction, thus lifting the shaft, until the impellers just clear their
seats and the shaft/motor/gear drive turns freely by hand. This position at which
the shaft begins to rotate is the starting position of the adjustement. 1/36 to 1/48
turns per unit length (m) of pump shaft should be made for pump models NVT
6-22 & NVT 4-60 and 1/36 to 1/54 turns per unit length (m) of pump shaft, should
be made for pump models NVT 6-115, NVT 8-170, NVT 8-230, NVT 10-285 & NVT 10-
340 further after the starting position of adjustement. Further adjustements may
be necessary after starting the pump if a high power consumption by the pump is
observed with caused diagnosed as too small impeller clearance.
5.4. Mounting Horizontal Driver (Engine or Horizontal Motor)

9
0
°
COMPANION FLANGE
DRIVER OR GEAR SHAFT
FLANGE FACE SHOULD BE
SQUARE WITH SHAFT TO
WITHIN 0.003 TIR
PILOT SHOULD BE CONCENTRIC TO BORE TO WITHIN 0.003 TIR
Fig. No. 10
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INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
The horizontal drivers are mounted on the base frame while shipping from the factory. Use the lifting arrangement
shown in the Fig. No. 01-a for hoisting the driver assembly. Lift the driver assembly and orient it so that the holes
in the base frame align with the foundation bolts. Lower the pump assembly until the bolts enter the holes in the base.
Fit shims to left and right of the foundation bolts, between the base frame and the foundation. If the shims are more
than 800 mm apart, position extra shims equal distant between them. Lower the hoist until the full weight of the
horizontal driver assembly is resting on the shims on the foundation.
Align the driver assembly using a precision spirit level (on the base frame) as shown in the Fig. No. 9. All shims must
be perfectly flush and uniformly tighten up using securing means. Base plates have to be grouted with non-shrinking
mortar up to the upper edge of the frame after having been fixed in position.
Check flange bores and shaft diameters for proper fit. Clean all mating surfaces, bores and faces removing grease, oil,
dirt, nicks, paint and other contaminants to insure proper fit and function of mating parts. Companion flanges are
bored for a slip fit over driver and gear shafts.
Align flange key with shaft key and gently tap flange on to shaft with extreme care to avoid any damage for flange or
flange face. Tighten the set screw provided over keyway to lock flange into position.
Makes sure that the shaft at both driven end and driver end are not extended out beyond the flange face or pilot bore
boss. Check the run-out of flange face and pilot diameter. Ensure that the total indicated run out is below 0.003" (see
Fig. No. 10). In cases where fly wheel adapter disc is used for connecting drive shaft to diesel engines, instead of fitting
companion flanges on the stub shaft, this disc should be properly aligned and tightly bolted onto the engine flywheel.
5.5. Mounting Drive Shaft