Alpha Tool.Com.HK Limited Polisher WDP120 User Manual

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	 Failure	to	do	so	may	cause	an	injury	due	to	high	impact	at	initial	start	up.
4.	 Stop	using	the	polisher	immediately	when	noticing	any	malfunctions	or	any			suspicious	abnormal	noises.
	 Turn	 the	power	 switch	 OFF	and	contact	 your	dealer	 or	Alpha	 Professional	 Tools
®
for	repair.
5.	 Handle	the	polisher	with	care.
	 If	you	accidentally	drop	the	polisher,	do	not	use	it	until	checking	that	it	is	not	 cracked,	deformed,	or	damaged	in	any	way.
6.	 Do	not	pour	water	or	any	liquids	onto	or	inside	the	polisher.
	 It	may	cause	electric	shocks.
7.	 Do	not	hold	the	polisher	in	a	vice.
8.	 Do	not	touch	any	rotating	parts.
	 Never 		touch	 the	polishing	 disc	of	the	 polisher 	during	 operation	 with	your	hands.
9.	 Do	not	leave	the	disc	while	spinning	on	the	bench,	floor	or	surface	of	your	
	 workpiece.
	 It	may	cause	an	accident	or	injury.
  WARNING!
10.	 Attach	the	backer	pad	and	polishing	disc	correctly	by	following	the	procedure	 in	this	instruction	manual.
	 Attaching	the	polishing	discs	incorrectly	may	cause	an	accident.
11.	 Observe	any	suspicious	abnormal	noises	when	a	polishing	disc	is	attached	for	 the	first	time	and	polisher	is	turned	ON.
	 It	may	cause	bodily	injury	if	the	polishing	disc	flies	off.
12.	 Do	not	touch	the	polishing	disc	while	spinning.
	 The	polishing	disc	spins	very	fast	and	you	may	hurt		yourself.
13.	 Be	careful	of	your	surroundings	when	working	in	high	places.	
	 When	 working	 in	 high	 places,	 make	 sure	 there	 are	 no	 people	 below.	 Do	 not	 trap	the	power	supply	cord	on	anything	or	drop	the	polisher	or	any	materials,	
otherwise,	It	may	cause	an	accident.	
		LAWS	AND	REGULATIONS	OF	NOISE	LEVELS
Please	 observe	 local	 laws	 and	 regulations	 regarding	 noise	 level	 in	 order	 to	 avoid	
disturbing	surrounding	areas.		Install	a	soundproof	wall	if	required	to	comply	with	
the	local	laws	and	regulations.	 
						

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GUARD INSTALLATION
Figure-4Figure-5 
						

							13
ATTACHING RUBBER CAP TO WDP-120
ATTACHING A BACKER PAD TO WDP-120
Rubber	Cap
Rubber	Cap
WET
DRY
Figure-6
Figure-7 
						

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WDP-120 WET OPERATION
WDP-120 DRY OPERATION
Rubber	Cap
Insert	the	rubber	cap	to	the	dust	gage	of	the	main	cover.
Rubber	Cap
Rubber	Hose	Adapter
Stainless	 Steel	
Hose	Band
Flexible	Connector	Hose
(optional	/	sold	separately) Figure-8
Figure-9 
						

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POLISH RIGHT UP TO THE WALL
Change	the	front	cover	to	the	sub	cover	
Loosen	 the	screws	 on	both	 sides	 of	the 	
C-handle	 and	move	 it	upward	 as	shown 	
in	Figure	11.
STEP 1
STEP 2
STEP 3
Figure-10
Figure-11
Figure-12 
						

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WDP-120	WET/DRY	CONCRETE	POLISHER	OPERATION
  CAUTION!
Always	be	sure	 that	the	tool	 is	switched	 off	and	 unplugged	 before	adjusting	 or	
checking	function	on	tool.
 MAIN	CONNECTION
Connect	only	to	single-phase	AC	current	supply	and	only	to	the	main	voltage	speci -
fied	on	the	rating	plate.	
 SWITCHING	ON	AND	OFF
  CAUTION!
Before 	plugging 	in 	the 	tool, 	always 	check 	the 	working 	voltage 	be 	sure 	that 	the 	voltage 	
specified	is	on	the	name	plate.		 Before	plugging	in	the	tool,	always	check	to	see	that	
the	slide	switch	actuates	properly	and	returns	to	the	“OFF”	position	when	the	rear	
of	the	slide	switch	is	depressed.
	 Switching	on:		
	 Switch	can	be	locked	in	“	ON”	position	for	 ease	 of	 operator	 comfort	 during	 extended	
use.		 Apply	 caution	 when	locking	 tool	in	
“ON”	 position	 and	 maintain	 firm	 grasp	 on	
tool.		Push	 power	switch	 to	the	 forward 	
position	 until	it	locks	 into	position	 as	shown 	
in	Figure	13.		
	 Switching	off:		
	 Push	down	on	power	switch	to	release	to	 the	rear	position	as	shown	in	Figure	14.
OFF POSITION
Figure-14Figure-13
ON POSITION 
						

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 GROUND	FAULT	CIRCUIT	INTERRUPTER	(GFCI)
	A	Ground	Fault	Circuit	Interrupter	is	built	in-line	with	the	power	supply	cord	to	
protect	the	operator	from	electric	shock.
1.	 GFCI	Information. –	 Alpha
®	Wet 	Polisher	is	provided	with	an	in-line	GFCI	as	a	standard	acces -
sory	for	your	safety,	and	to	prevent	possible	electric	shocks.		 It	is	strongly	
advised	to	test	the	GFCI	on	a	regular	basis.
  DANGER!
Never	attach	a	damaged	extension	cord	to	the	polisher.
	 NOTE:		Use	the	appropriate	extension	cord,	see	table	on	page	9.
  CAUTION!
When	the	GFCI	trips,	this	could	be	the	result	of	water	entering	the	polisher	housing.
1.	Turn	OFF	the	power	switch,	disconnect	polisher	from	power	supply	and	blow	dry	air	inside	the	motor	cover	through	the	air	vents.
2.	Re-connect	 power	 supply	 and	 press	 the	 GFCI	 reset	 button.	 The	 polisher	 is	 ready	to	start	working	once	the	reset	button	is	pressed	down.	
  DANGER!
Always	check	that	the	GFCI	unit	is	working	correctly	(reset,	test,	and	reset)	before	
using	 this	tool.		Do	 not	use	 the	tool	 if	the	 GFCI	 is	not	 working	 correctly.		Do	 not	bypass 	
the	GFCI	if	this	condition	occurs,	a	real	shock	hazard	may	exist.
  WARNING!
If	the	GFCI	fails	to	trip	when	the	test	button	is	pressed,	or	fails	to	reset,	the	device	
is	defective	and	should	replaced.
  CAUTION!
1.  The	GFCI	is	a	safety	device,	do	not	use	as	an	on/off	switch.
2.  The	 GFCI	 on	 the	 tool	 will	 not	 protect	 you	 if	 you	 cut	 into	 another	 current	
carrying	conductor.
3.  Do	not	use	where	water	may	enter	GFCI	case. 
						

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 TESTING	IN-LINE	GFCI	UNIT	(Before	Each	Use	Of	The	Polisher)
1.	Connect	polisher	to	a	single	phase	AC	power	supply.
2.	Verify	that	the	indicator	lens	shows	red	(indicating	output	voltage).
3.	Press	the	test	button	to	verify	that	the	red	in	the	indicator	lens	disappears.
4.	Press	the	reset	button	to	verify	the	red	indicator	is	visible.
5.	The	GFCI	is	now	ready	for	use.
  WARNING!
DO	NOT	USE	IF	ABOVE	TEST	FAILS!
 VARIABLE	SPEED	ADJUSTMENT
This	polisher	is	equipped	with	a	Variable	Speed	control	
that	will	allow	the	spindle	speed	to	be	adjusted	from	
500	 RPM	 to	2800	 RPM.	 Speed	 adjustment	 is	controlled 	
by	rotation	of	the	wheel	as	shown	in	the	Figure	14.
NOTE-	Wheel	numbers	are	for	reference	point	of	mo -
tor	speed	(#1	is	500	RPM	and	#6	is	2800	RPM).
	 Adjust	 the	 RPM	 of	 the	 tool	 to	 match	 the	 recom -
mended	RPM	of	the	product	being	used.
Indicator	viewing	lens.
RED	 lens	shows	 power	to	
polisher.
CLEAR	lens	shows	no	pow -
er	to	polisher.
RESET	BUTTON
TEST	BUTTON
Figure-15 Figure-16
INCREASE SPEEDDECREASE	SPEED
Figure-17 
						

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 SPEED	POT	FEEDBACK	SENSOR
This	polisher	is	equipped	with	a	Closed	Loop	Feedback	sensor	that	is	attached	to	
the	speed	pot.		When	a	load	is	applied	to	the	tool,	the	sensor	will	re-adjust	the	RPM	
to	maintain	a	constant	speed.
 WATER	CONTROL	VA LV E
  CAUTION!
Adjust	the	water 	flow	 to	wet	 the	stone	 and	remove	 waste,	excessive	 spray	and	mist	 will	
get	 inside	 the	tool	 and	cause	 premature	 failure	of	the	 tool	 and/or	 cause	the	GFCI	 to	trip.
This	polisher	is	equipped	with	a	center	water-feed	system.	Water	flow	to	the	spindle	
shower	 bolt	 can	 be	 controlled	 by	 throttling	 the	 valve	 stem	 as	 seen	 in	 Figure	 18,	
Figure	19	and	Figure	20.
Water	Valve	in
closed	position Water	Valve	in
half	open	position
Water	Valve	in	full	open	position
Figure-18 Figure-19
Figure-20 
						

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 WATER-FEED	ATTACHMENT
Attach	the	polisher	water-line	fitting	to	any	garden	hose	connection.
OPERATION
  WARNING!
To	reduce	the	risk	of	electric	shock,	check	the	tool’s	water	supply	system	to	ensure	
there	 is	no	 damage	 to	the	 seals	 or	hoses.	A	 damaged	 water	supply	 system	 may	result 	
in	abnormal	water	flow	to	the	tool	which	could	be	dangerous.
  CAUTION!
Always	wear	safety	goggles	or	a	face	shield	during	operation.	Never	switch	on	the	
tool	 when	 it	is	 in	 contact	 with	the	workpiece,	 it	may	 cause	 an	injury	 to	operator.	 Never	
run	the	tool	without	properly	installed	accessories.
Make	 sure	that	the	water	 valve	is	closed.	 Connect	 the	garden	 hose	adapter	 to	the	 water 	
source.	Make	sure	that	water	comes	out	when	the	water	valve	is	opened.		Hold	the	
tool	firmly.	Turn	the	tool	on	and	begin	your	application.		 Apply	slight	pressure	only.	
Excessive	pressure	will	result	in	poor	performance	and	premature	wear.
MAINTENANCE	
  CAUTION!
Always	 be	 sure	 that	 the	 tool	 is	 switched	 off	 and	 unplugged	 before	 attempting	 to	
perform	inspection	or	maintenance.
		DAILY
1.  Before	 daily	 start-up	 inspect	 tool,	 power	 cord,	 GFCI,	 and	 backer	 pad	 or	 other	
spindle	attachments.
2.  If	damage	has	occurred,	repair	affected	areas	before	use.
3.  Connect	the	tool	to	the	correct	power	source	and	test	the	Ground	Fault	Circuit	
Interrupter	(GFCI)	before	using	the	tool.		Push	the	RESET	button	and	confirm	
that	the	red	light	is	on,	push	the	TEST	button	and	confirm	that	the	red	run	light	
is	off	and	push	the	RESET	button	to	use	the	tool.
4.  Turn	 the	unit	 on	and	 run	in	a	 no-load	 condition	 to	ensure	 that	backer 	pad	 or	other 	
spindle	attachment	is	balanced.
5.  After	daily	use	of	the	tool,	clean	and	blow	off	the	exterior	of	tool	and	around	the	
rear	air	intake	vents	to	remove	any	standing	water	or	dust.		Failure	to	do	this	
will	shorten	the	life	of	your	tool,	and	could	void	your	warranty.