Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-351-5400 www.haywardpool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
1
If the normal pump and filter system flow rate
exceeds 15 gpm then a manual bypass valve must
be installed as shown in Figure 1. Damage caused
by flow rates outside this range will void the
manufacturer’s warranty.
The installation is as follows:
1. Install a flow meter on the outlet line of the
heater.
. Adjust the manual bypass valve until the
flow rate is within the flow rate range specified for the heater.
. Once the valve is set, note the position and remove the valve handle to prevent further adjustment.
ATTENTION:
Improperly adjusted manual bypass valves will result in damage to the heater if the
flow rates are not maintained as specified in Figure 20 under all operating conditions. The heat ex
-
changer will fail and this damage will not be covered under the Hayward warranty.
Figure illustrates a typical pool piping diagram and layout for the pool equipment.
Figure illustrates a multiple heater installation for very large pools with and without a manual
bypass valve.
Figure 20
Water Flow Rate, gallons/minute
Model
Minimum
flow rate
Maximum
flow rate
H50FD
5
15
H50FD
H00FD
0
15
Figure 21: Manual Bypass valve