Heater Operation - Hayward H150FD Owner's Manual

4. CHLORINATOR INSTALLATION
Chlorinators must be installed downstream of the heater, and a check valve must be installed between the
heater and chlorinator to prevent high chemical concentrations from back flowing into the heater. Make sure your
piping arrangement meets the chlorinator installation requirements shown in the installation manual on page 26.
5. BYPASS
Until water chemistry is properly balanced, and if your piping has a bypass valve installed for the heater,
open the bypass so that corrosive and potentially damaging water will not flow through the heater and there-
fore the heat exchanger. Close the bypass valve once the water is properly balanced. Failure to close the
bypass valve when attempting to operate the heater will result in extensive damage to the heat exchanger.
Ensure water flow through the heater is restored before operating the heater. A bypass feature is also advanta-
geous for service needs and for the ability to remove the heater from the water path when not heating. Refer
to page 25 in the installation manual for further information.

HEATER OPERATION:

Full lighting and shutdown instructions are included on the lighting & operating instructions label affixed
to the inside of the front access panel. See Figure 1 for the location of this label and the keypad. See Figure 2
for the label.
New Figure 1 for UHS owner manual page 9:
Figure 1: Keypad and label locations
Figure 1
User Interface
Keypad
Front Access
Panel
WARNING: If you smell gas in the appliance area or near the floor (PROPANE IS
New text for UHS owner manual page 11:
HEAVIER THAN AIR AND HENCE SETTLES ON THE FLOOR), stop and follow
TEMPERATURE ADJUSTMENT
the instructions on the front cover of this manual. Since propane can accumulate in con-
This pool heater is equipped with a digital thermostat which allows the user to select the desired
fined areas, extra care should be taken when lighting propane heaters.
water temperature. The heater will then function automatically to maintain the desired
temperature. The heater has 3 modes of operation:
ATTENTION: Do not use the heater below 40°F (4°C) temperature without adequate temperature protection.
1. STANDBY: in this mode, the heater will not function to heat the water.
2. SPA: in this mode, the heater will automatically function to maintain the water
WARNING: Do not ingest alcohol or drugs during use or prior to using pool, spa, or hot tub. Ingestion of such
intoxicants can cause drowsiness, which can lead to unconsciousness, and subsequently result in drowning. 3. POOL: in this mode, the heater will automatically function to maintain the water
Use the MODE button to change modes. The indicator lights will illuminate to show which mode
the heater is currently in. Each mode has its own temperature setting, allowing the user to have
2 individual pre-set temperature settings. To adjust the temperature while in SPA or POOL
mode, use the UP and DOWN buttons. The numeric display will flash to indicate the
temperature setting is being displayed / adjusted. When the numeric display is not flashing, the
actual water temperature is being displayed. The temperature settings for both SPA and POOL
modes are initially set at the factory to 65°F. The minimum allowed settings for SPA and POOL
temperature setting for SPA mode.
temperature setting for POOL mode.
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-351-5400 www.haywardpool.com
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