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Instructions for DEX2420MAR2 Manual Air Relief Valve
Basic safety precautions should always be followed, including the following: Failure to follow instructions can cause severe injury and/or
death.
This is the safety-alert symbol. When you see this symbol on your equipment or in this manual, look for one of the following signal
words and be alert to the potential for personal injury.
warns about hazards that could cause serious personal injury, death or major property damage and if
ignored presents a potential hazard.
warns about hazards that will or can cause minor or moderate personal injury and/or property damage and
if ignored presents a potential hazard. It can also make consumers aware of actions that are unpredictable and unsafe.
The NOTICE label indicates special instructions that are important but not related to hazards.
READ, UNDERSTAND AND FOLLOW ALL SAFETY AND OPERATION
INSTRUCTIONS
PRESSURE HAZARD
Pool and spa water circulation systems operate under
hazardous pressure during start up, normal operation, and after
pump shut off.
Stand clear of filter during pump start up.
Failure to follow safety and operation instructions could result
in violent separation of the upper filter body and / or manual air
relief valve assembly due to pressure in system, which could
cause property damage, severe personal injury or death.
STEPS TO PREVENT EXCESSIVE PRESSURE BUILDUP IN
SYSTEM
Before servicing pool and spa water circulation system all
system and pump controls must be in off position and filter
manual air relief valve must be in open position.
Before starting system pump all system valves must be set in a
position to allow system water to return back to the pool. Do
not change filter control valve position while system pump is
running.
Before starting system pump fully open filter manual air relief
valve, do not close manual air relief valve until a steady stream
of water (not air or air and water) is discharged.
FILTER COMPONENT
SEPARATION HAZARD
Failure to follow safety and operation instructions could result
in violent separation of filter components.
Upper and lower filter bodies must be properly secured with
filter body clamp.
Before servicing pool and spa circulation system, manual air
relief valve must be in open position. Do not operate pool and
spa circulation system if a system component is not assembled
properly, damaged or missing.
HAYWARD POOL PRODUCTS, INC. 620 Division St., Elizabeth, NJ 07207 TEL: 908-351-5400 WWW.HAYWARDPOOL.COM
ISDE2420MAR2
Do not operate pool and spa circulation system unless filter air
relief valve body is in locked "LOCK" position in filter upper
body.
Instructions
REMOVING THE MANUAL AIR RELIEF VALVE
Your Filter comes with the Manual Air Relief Valve (MAR) pre-
installed from the factory. Only qualified pool professionals
should service your filter's Manual Air Relief Valve. For
Qualified pool professionals only: If filter MAR valve needs to
be re-installed, follow this instruction carefully.
1.
Shut off Pump
2.
Open MAR Valve to open position to relieve pressure.
3.
Grasp the MAR body at the flats, turn the MAR
counterclockwise (as the arrow indicated) until the notch on the
on the MAR flange is aligned with the "UNLOCK" position as
shown on the filter head.
4.
Pull out the MAR carefully.
RE-INSTALLATION
1.
Align the notch in the MAR Flange with notch on the MAR part
of the filter head.
2.
Turn the MAR clockwise (as the arrow indicates) until the notch
is aligned with the "LOCK" position as shown on the filter head.
3.
Close filter drain.
4.
Open all system valves to allow water flow from filter to pool
and pool to pump / filter system prior to starting system.
5.
Open filter manual air relief valve to full open position to allow
air evacuation from filter during system start up.
6.
Stand Clear of system during system start-up.
7.
Close filter manual air relief valve when a steady stream of
water, not air and water mix, is discharged from filter manual air
relief valve.
REPLACEMENT PARTS
MANUAL AIR RELIEF
1
DEX2420MAR2
ASSEMBLY
MANUAL AIR RELIEF VALVE
2
CCX1000V
WITH O-RING
MANUAL AIR RELIEF VALVE
3
CCX1000N
NUT
4
DEX2420Z8A
O-RING KIT (SET OF 2)
5
ECX2712B1
PRESSURE GAUGE
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