Hayward GM140 User manual

Your GM Series high-rate sand filter is a high performance,
totally corrosion-proof filter that blends superior flow
characteristics and features with ease of operation. It
represents the very latest in high-rate sand filter technology.
It is virtually foolproof in design and operation and when
installed, operated and maintained according to
instructions, your filter will produce clear, sparkling water
with only the least attention and care.
HOW IT WORKS
Your filter uses special filter sand to remove dirt particles
from pool water. Filter sand is loaded into the filter tank and
functions as the permanent dirt removing media. The pool
water, which contains suspended dirt particles, is pumped
through your piping system and is automatically directed by
the patented filter control valve to the top of the filter tank.
As the pool water is pumped through the filter sand, dirt
particles are trapped by the sand bed, and filtered out. The
cleaned pool water is returned from the bottom of the filter
tank, through the control valve and back to the pool through
the piping system. This entire sequence is continuous and
automatic and provides for total recirculation of pool water
through your filter and piping system.
After a period of time, the accumulated dirt in the filter
causes a resistance to flow, and the flow diminishes. This
means it is time to clean (backwash) your filter. With the
control valve in the backwash position, the water flow is
automatically reversed through the filter so that it is directed
to the bottom of the tank, up through the sand, flushing the
previously trapped dirt and debris out the waste line. Once
the filter is backwashed (cleaned) of dirt, the control valve is
manually resequenced to Rinse, and then Filter, to resume
normal filtering.
INSTALLATION
Only simple tools (screwdriver and wrenches), plus pipe
sealant for plastic adapters, are required to install and/or
service your GM filter.
The filter system should be placed on very firm ground,
or equivalent, as recommended by your pool dealer.
Position filter so that the piping connections, control valve
and winter drain are convenient and accessible for
operation, service and winterizing.
Assemble pump and pump mounting base, if supplied, to
the filter according to instructions packed with the base.
Be sure standpipe is centered in the tank opening, and
that protective cap is in position as shown. Also make
sure that standpipe is seated in bottom of tank.
IMPORTANT: All threaded fittings should be wrapped with Teflon pipe
sealant tape before assembly. Wrap 3-4 turns in a clockwise direction,
then assemble the fittings as far as possible. Then tighten with a small
wrench one additional turn. (Tighten pressure gauge by hand only!)
Damage to any part caused by over-tightening or use of any sealant
other than Teflon tape, or approved plastic pipe sealant is not covered
under warranty.
1.
2.
3.
GM SERIES
ISGM140/152-99
GM140, GM142, GM152 SERIES

REF.
NO.
1
2a
2b
2c
3a
3b
4
----
5
----
----
6
----
----
----
7
8a
----
8b
9
10
11
12
13a
13b
14
15
16
17
18
19
20
NO.
REQ’D.
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
1
2
1
1
1
1
1
1
1
10
1
1
1
1
1
1
PART
NO.
ECX27081
SP0714T
SP0704
GM400
GMX600F
GMX400-F
GMX600N
GMX400K
SX202S
GMX142Z1
GMX152Z1
GMX152Z15
GMX140Z2
GMX142Z15
SX160Z4
SPX1091Z6
SPX1091Z3
ECX18028
SPX1091Z41
SPX1091Z4
SPX1091Z7
SPX1105Z3
-----
-----
-----
-----
GMX152DA
SX200Q
GMX152Z4
GMX152Z5
-----
EC1161
ECX1306
ECX1109
DESCRIPTION
Pressure Gauge
Multiport Valve (6-Way)
Multiport Valve (4-Way)
Multiport Valve (4-Way)
Valve/Tank O-Ring (SP0714T & SP0704)
Valve/Tank O-Ring (GM400)
Valve/Tank Flange Clamp
(SP0714T & SP0704)
Valve/Tank Flange Clamp
(GM400, Not Shown)
Sand Shield (GM152 Series)
Protector Cap 1-1/4”
Protector Cap 1-1/2”
Pump Connecting Hose 1-1/2”x 27”
(GM140HV, GM1426, GM152B,
GM1526)
Pump Connecting Hose 1-1/4”x 20”
(GM140B) - Not Shown
Pump Connecting Hose 1-1/4”x 24”
(GM142LB) - Not Shown
Pump Connecting Hose 1-1/2”x 26”
Clear (GM152K) - Not Shown
Hose Clamp
Hose Clamp (GM140) - Not Shown
Hose Clamp (GM152) - Not Shown
1-1/2”Straight Hose Adapter
(GM1426 & GM152)
1-1/2” Straight Hose Adapter
(GM140HV)
Combo Hose Adapter
(GM140B & GM142LB)
90˚ Elbow Hose Adapter (Only for
GM1426 & GM152 Series)
Standpipe (Part of Tank Ass’y.)
Filter Tank w/Underdrain & Pipe
(See below for specific Part No.)
.44 mm - .55 mm Filter Sand
Supplied Separately
Underdrain (Part of Tank Ass’y. for 140 &
142 Series).
Lateral Ass’y. w/Center Pipe (for
GM152 Series)
Lateral for GM152 Series
Tank Drain Plug (3/4”)
Drain Plug O-Ring
Hayward Above-Ground Pump
Platform Econo Base
Pump Mounting Screw
Washer
The chart below is an easy reference guide
to help distinguish the valve and tank
numbers for your specific filter.
SPECIFICATIONS
MODEL #
GM140 SERIES
GM142 SERIES
GM152 SERIES
EFFECTIVE
FILTRATION AREA AVERAGE
FLOW RATE MAXIMUM WORKING
PRESSURE SUGGESTED CLEARANCE SIDE ABOVE MEDIA REQUIRED TYPE* AMOUNT
FT2
1.07
1.07
1.23
M2
0.1
0.1
0.12
GPM
25-35
25-35
30-35
PSI
50
50
50
BAR
3.45
3.45
3.45
IN
18
18
18
IN
18
18
18
CM
46
46
46
KGS
18
23
23
LBS
40
50
50
MM
.45-.55
FILTER
SAND
CM
46
46
46
LPM
95-133
95-133
114-133
*Also known as #20 Silica Sand
GM SAND FILTER TANK & VALVE SELECTION
FILTER SERIES
GM140
GM142
GM152
TANK
GMX140AB1
GMX140ABK1
GMX142AB1
GMX142ABK1
GMX152AB1
a
b
a
a
a
bc
b
bVALVE
GM400
SP0704 or SP0714T
GM400
SP0704 or SP0714T
SP0704 or SP0714T

If you own a GM152 Series filter, fill the tank 1/2 way with
water to provide a cushioning effect when the filter sand is
poured in. Note: Check to confirm all laterals are in the
down position before loading with sand. (See Figure A
on Page 2).
Loading Sand Media. Sand Media (.45mm-.55mm) is
loaded through the top opening of the filter. Sand surface
should be leveled and the distance from the surface of the
sand top of the tank should be at least 12 inches. Use no
more than the recommended amount of sand.
Center the standpipe in the opening and remove the
protective cap. Place stainless steel flange clamp around
neck of tank. Check to be sure that O-ring is in place on
valve flange as shown.
Screw straight adapter, using Teflon pipe sealant or
Permatex No. 2, securely into pump discharge. (Do not
overtighten).
Screw elbow or straight adapter, using Teflon pipe sealant
tape or Permatex No. 2, securely into opening in control
valve marked PUMP. (Do not overtighten). For those with
elbow adapter, elbow should point toward pump at
approximately 45˚ angle.
NOTE: To prevent breakage and damage to pump and control
valve, use only pipe sealants specifically formulated for
plastics. Do not overtighten fittings or adapters.
Insert the valve into the tank neck taking care that
standpipe slips into hole in bottom of valve. Snap flange
clamp around valve flange and tank neck. Do not tighten.
Slip hose clamps on ends of plastic hose. Rotate valve so
that elbow or straight adapter and pump adapter are
aligned and connect the two by pushing the ends of the
plastic hose over the adapters and tightening the hose
clamps.
Tap all around stainless steel valve flange clamp and
tighten with screwdriver. Carefully screw pressure gauge
with pipe tape, into 1/4” tapped hole in the valve body, or
the tank body if using GM400 valve.
Make connections from valve opening marked RETURN to
the pool inlet. Connect skimmer and/or main drain to
suction side of pump.
Make electrical connections to pump per pump instructions.
To prevent water leakage, be sure winter drain cap is
securely in place and all pipe connections are tight.
INITIAL START-UP OF FILTER
Be sure correct amount of filter sand media is in tank and
that all connections have been made and are secure.
Depress valve handle and rotate to BACKWASH position.
Prime and start pump according to pump instructions (be
sure all suction and return lines are open), allowing the
filter tank to fill with water. CAUTION: All suction and
discharge valves must be open when starting the
pump. Failure to do so could cause severe personal
injury and/or property damage. Once water flow is
steady out the waste line, run the pump for at least
1 minute. The initial backwashing of the filter is
recommended to remove any impurities or fine sand parti-
cles in the sand media.
(This step only for those with 6-position valve). Turn
pump off and set valve to RINSE position. Start pump
and operate until water in sight glass is clear—about
1/2 to 1 minute.
Turn pump off, set valve to FILTER position and restart
pump. Your filter is now operating in the normal filter mode,
filtering particles from the pool water.
Adjust pool suction and return valves to achieve desired
flow. Check system and filter for water leaks and tighten
connections, bolts, nuts, as required.
Note the initial pressure gauge reading when the filter is
clean. (It will vary from pool to pool depending upon the
pump and general piping system).As the filter removes dirt
and impurities from the pool water, the accumulation in the
filter will cause the pressure to rise and flow to diminish.
When the pressure gauge reading is 8-10 PSI (0.55-0.69
BAR) higher than the initial “clean” pressure you noted, it
is time to backwash (clean) the filter (see BACKWASH
under Filter Control Valve Functions).
NOTE: During initial clean-up of the pool water it may be
necessary to backwash frequently due to the unusually
heavy initial dirt load in the water.
CAUTION: To prevent unnecessary strain on piping
system and valving, always shut off pump before
switching filter control valve positions.
To prevent damage to the pump and filter and for proper
operation of the system, clean pump strainer and skimmer
baskets regularly.
FILTER CONTROL VALVE FUNCTIONS
FILTER—Set valve to FILTER for normal filtering. Also use for
regular vacuuming.
BACKWASH—For cleaning filter. When filter pressure gauge
rises 8-10 PSI (0.55-0.69 BAR) above start-up (clean
pressure):
Stop the pump, set valve to BACKWASH. Start pump and
backwash approximately 2 minutes or less, depending on dirt
accumulation, until water in sight glass is clear. Proceed to
RINSE.
RINSE—After backwashing, with pump off, set valve to RINSE.
Start pump and operate for about 1/2 to 1 minute. This ensures
that all dirty water from backwashing is rinsed out of the filter to
waste, preventing possible return to the pool. Stop pump, set
valve to FILTER, and start pump for normal filtering. (Option
only available with 6-position valve).
WASTE—To bypass filter for draining or lowering water level
and for vacuuming heavy debris directly to waste.
RECIRCULATE—Water is recirculated through the pool
system, bypassing the filter.
CLOSED—Shuts off flow from pump to filter. (Option only
available with 6-position valve).
VACUUMING—Vacuuming can be performed directly into the
filter. When vacuuming heavy debris loads, set valve to
WASTE position to bypass the filter and vacuum directly out to
waste.
DRAIN—To lower water level or drain pool by gravity (pump
must be OFF).
4.
4a.
5.
6.
7.
8.
9.
10.
11.
12.
13.
1.
2.
3.
3a. *NOTE: For new concrete or gunite pools, or where there is a large amount of
plaster dust or debris—start filter in FILTER position (not BACKWASH) to prevent
clogging of underdrain laterals.
4.
5.
6.

PROBLEM SOLVING LIST
LOW WATER FLOW SHORT FILTER CYCLES POOL WATER WON’T CLEAR UP
Check skimmer and pump
strainer baskets for debris.
Check for restrictions in
intake and discharge lines.
Check for air leak in intake
line (indicated by bubbles
returning to pool).
Backwash filter.
Check for algae in pool and
superchlorinate as required.
Be sure chlorine and pH
levels are in proper range
(adjust as required).
Check surface of filter sand
for crusting or caking
(remove 1”of sand if
necessary).
Check chlorine, pH and total
alkalinity levels and adjust
as required.
Be sure flow rate through
filter is sufficient.
Operate filter for longer periods.
Be sure Vari-Flo valve is set
on “Filter” position.
1.
2.
3.
4.
1.
2.
3.
1.
2.
3.
4.
REMEDY
POOL CHEMISTRY GUIDELINES
ACTION REQUIRED TO CORRECT POOL CHEMISTRY
TO RAISE TO LOWER
SUGGESTED POOL CHEMISTRY LEVELS
pH
TOTAL ALKALINITY
CHLORINE (UNSTABILIZED)
CHLORINE (STABILIZED)
CHLORINE STABILIZER
(Cyanuric Acid)
7.2 to 7.6
100 to 130 ppm
0.3 to 1.0 ppm
1.0 to 3.0 ppm
40 to 70 ppm
Add Soda Ash
Add Sodium Bicarbonate
Add Chlorine Chemical
Add Chlorine Chemical
Add Stabilizer
Add Muriatic Acid or Sodium Bisulphate
Add Muriatic Acid
No action - chlorine will naturally dissipate
No action - chlorine will naturally dissipate
Dilution - partially drain & refill pool with water
that has not been treated with Cyanuric Acid.
©1999 Hayward Printed in U.S.A.
WINTERIZING
Completely drain tank by unscrewing drain cap at base of
filter tank. Leave cap off during winter.
Depress filter control valve handle and rotate so as to set
pointer on valve top between any two positions. This will
allow water to drain from the valve. Leave valve in this
“inactive” position.
Drain and winterize pump according to pump instructions.
SERVICE & REPAIRS
Consult your local authorized Hayward dealer or service
center. No returns may be made directly to the factory
without the expressed authorization of Hayward Pool
Products, Inc.
1.
2.
3.
PLEASE REALIZE . . .
Pure, clear swimming pool water is a combination of two
factors—adequate filtration and proper water chemistry
balance. One without the other will not give the clean water
you desire.
Your filter system is designed for continuous operation.
However, this is not necessary for most swimming pools.
You can determine your filter operation schedule based on
your pool size and usage. Be sure to operate your filtration
system long enough each day to obtain at least one
complete turnover of your pool water.
To properly sanitize your pool, maintain a free chlorine level
of 1 to 3 ppm and a pH range of 7.2 to 7.6. Insufficient
chlorine or an out of balance pH level will permit algae and
bacteria to grow in your pool and make it difficult for your
filter to properly clean the pool water.
2/99