Service And Repairs - Hayward Pro-Grid Owner's Manual

RE-INSTALLATION OF THE MANUAL AIR RELIEF VALVE
In areas where subfreezing temperatures can be expected, the filter should be drained to protect the filter from damage.
1. The filter should be disassembled and the filter elements cleaned or replaced.
2. Follow directions under FILTER DISASSEMBLY INSTRUCTIONS
3. Then REMOVING ELEMENT CLUSTER and CLEANING ELEMENT CLUSTER per instructions
4. Reassemble per the instructions on Page 7.
5. Be sure to leave the drain plug unattached during the winter season to avoid cracking the filter body.
Consult your local authorized Hayward dealer or service center. No returns may be made directly to the factory without the
expressed written authorization of Hayward Pool Europe.
Remedy Low water flow
1. Check skimmer and pump strainer
baskets for debris.
2. Check for restrictions in intake and
discharge lines
3. Check for air leak in intake line
(indicated by bubbles returning to pool).
4. Backwash (Clean) Filter
Model Effective filtration rate
DE2420EURO
DE3620EURO
DE4820EURO
DE6020EURO
DE7220EURO
Page 8 of 8

SERVICE AND REPAIRS

CHEMICAL
Combined chlorine
Chlorine (Stabilized)
pH
Cyanuric Acid
(Stabilizer)
Total Alkalinity
Calcium Hardness
PROBLEM SOLVING LIST
CHARACTERISTICS
Ft² M²
24 2.2
36 3.4
48 4.5
60 5.6
72 6.7
Maximum working pressure for all models 3.5 Bar (50 PSI)
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
IDEAL LEVELS
0.2 ppm Maximum
1.0 to 3.0 ppm
7.2 to 7.6
20 to 30 ppm
80 to 120 ppm
200 to 300 ppm
Short filter cycles
1. Check for algae in pool and super-
chlorinate as required.
2. Be sure chlorine and pH levels are in
proper range (adjust as required).
Design flow rate
GPM
48
72
96
120
144
Pro-Grid
Pool water won't clear up
1. Check chlorine, pH and total alkalinity
levels and adjust as required.
2. Be sure flow rate through filter is
sufficient.
3. Operate filter for longer periods.
Recommended amount of D.E.
3
M /h LBS
11 3.0
16 4.5
22 6.0
27 7.5
33 9.0
Kg
1.4
2.0
2.7
3.4
4.0
Rev. A