Hayward H150FD Pool And SPA-Hot Tub Heaters

Introduction
This manual contains instructions for the operation and safe use of the swimming pool/spa/hot tub heaters. Hayward strongly recommends that the owner read the manual before using the swimming pool/spa/ hot tub heater. If, after reviewing the manual, any questions remain unanswered, contact the factory or local representative.
Safety Instructions
- Spa or hot tub water temperatures should never exceed 104°F [40°C]. A temperature of 100°F [38°C] is considered safe for a healthy adult. Special caution is suggested for young children. Prolonged immersion in hot water can induce hyperthermia.
- Drinking alcoholic beverages before or during spa or hot tub use can cause drowsiness, which could lead to unconsciousness and subsequently result in drowning.
- Pregnant women beware! Soaking in water above 100°F [38°C] can cause fetal damage during the
first three months of pregnancy (resulting in the birth of a brain-damaged or deformed child). Pregnant women should adhere to the 100°F [38°C] maximum rule. - Before entering the spa or hot tub, users should check the water temperature with an accurate thermometer; spa or hot tub thermostats may err in regulating water temperatures by as much as 4°F..
(2.2°C). - Persons taking medications, which induce drowsiness, such as tranquilizers, antihistamines, or anticoagulants, should not use spas or hot tubs.
- If the pool/spa is used for therapy, it should be done with the advice of a physician. Always stir pool/ spa water before entering the pool/spa to mix in any hot surface layer of water that might exceed healthful temperature limits and cause injury. Do not tamper with controls, because scalding can result if safety controls are not in proper working order.
- Persons with a medical history of heart disease, circulatory problems, diabetes, or blood pressure problems should obtain a physician’s advice before using spas or hot tubs.
- Hyperthermia occurs when the internal temperature of the body reaches a level several degrees above the normal body temperature of 98.6°F [37°C]. The symptoms of Hyperthermia include: drowsiness, lethargy, dizziness, fainting, and an increase in the internal temperature of the body.
If You Smell The Gas
- Do not try to light any appliance.
- Do not touch any electrical switch; do not use any phone in your building.
- Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
- If you cannot reach your gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer, service agency, or the gas supplier.
The effects of Hyperthermia include
- Unawareness of impending danger.
- Failure to perceive heat.
- Failure to recognize the need to leave the spa.
- Physical inability to exit the spa.
- Fetal damage in pregnant women.
- Unconsciousness resulting in danger of drowning
Definiations
- Suction Outlet
The term Suction Outlet is a fitting, fitting assembly, cover/grate, and related components that provide a means for water to exit the pool and into the pump circulating system. - Inches of Mercury (in Hg)
A unit for measuring pressure below atmospheric (“suction” or “vacuum”) (1.0 inch Hg = .491 PSI) - Main Drain
See Suction Outlet - PSI
An abbreviation for pounds per square inch.
Maintainance
WATER FLOW THROUGH THE HEATER
- Water must be flowing through the heater at the minimum rated flow rate during operation.
- Some installations may require an adjustment to the water pressure switch for proper low-flow protection. Test your system and, if necessary, adjust the water pressure switch as described in the installation manual on page 36.
POOL/SPA WATER CHEMISTRY
- The chemistry balance and mineral content of swimming pool water change daily due to the addition of pool and sanitizing chemicals, bather loads, rain, runoff, and the amount of sun, to name a few.
- Improper chemistry balance and mineral content can cause scaling and deposits to form on pool walls, in the filtration system, in the heat exchanger tubes, and additionally can promote corrosive action to all metals in the water path.
- Changing spa water regularly and maintaining the correct chemical balance in your pool/spa will keep the pool/spa safe and sanitary, and will help protect the heat exchanger. Use a 4-way pool/spa water test kit to check your water frequently (at least weekly). Use the following guidelines to help protect your heater’s heat exchanger.
| Recommended Level | Effect of Low Levels | Effect of High Levels | |
| Chlorine | 1 – 3 ppm | hazy water, algae growth, bacteria causing infections | swimmer irritation, bleaching of clothes/hair, corrosive to the heat exchanger |
| Bromine | 2 – 4 ppm | ||
| pH | 7.4 – 7.6 | corrosive to the heat exchanger, swimmer irritation | cloudy water, scaling of the heat exchanger, and reduced sanitizer effectiveness |
| Total Alkalinity | 80 – 120 ppm | corrosive to the heat exchanger, and large fluctuations in pH | scaling of the heat exchanger |
| Calcium Hardness | 200 – 400 ppm | corrosive to the heat exchanger | scaling of the heat exchanger |
| Salt | 2700 – 5000 ppm | Poor salt chlorinator performance |
SKIMMER CHLORINATION
- Placing chlorine or bromine tablets directly into the skimmer may result in high chemical concentrations flowing through the heater. DO NOT place chlorine or bromine tablets in the skimmer.
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 backflowing into the heater.
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 therefore 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 advantageous for service needs and for the ability to remove the heater from the water path when not heating. Refer to page 26 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.
Keypad and label locations
- If you smell gas in the appliance area or near the floor (PROPANE IS HEAVIER THAN AIR AND HENCE SETTLES ON THE FLOOR), stop and follow the instructions on the front cover of this manual. Since propane can accumulate in confined areas, extra care should be taken when lighting a propane heater.: Do not use the heater below 40°F (4°C) temperature without adequate temperature protection.
Lighting & Operating Instructions
- This appliance does not have a pilot. It is equipped with an ignition device that automatically lights the burners. Do not try to light the burners by hand.
- BEFORE LIGHTING, smell all around the appliance area for gas. Be sure to smell next to the floor because some gases are heavier than air and will settle on the floor.
Operation Instructions
- STOP! Read the safety information on this label.
- Change the “MODE” on the control panel to “STANDBY”.
- Remove the heater’s front access panel.
- This appliance is equipped with an ignition device that automatically lights the burner. Do not try to light the burners by hand.
- Turn gas control knob clockwise • to “OFF”
- Wait five (5) minutes to clear out any gas. If you then smell ne CTODI Callo 4D9 in the safety information on this label. If you don’t smell gas, go to the next step.
- Turn the gas control knob counterclockwise to”ON”.
- Replace the heater’s front access panel.
- Set the “MODE” on the control panel to “SPA” or “POOL”.
- Set the set point temperature on the control panel to the desired setting.
TEMPERATURE ADJUSTMENT
This pool heater is equipped with a digital thermostat, which allows the user to select the desired water
temperature. The heater will then function automatically to maintain the desired temperature. The heater has 3 modes of operation:
- STANDBY
In this mode, the heater will not function to heat the water. - SPA
In this mode, the heater will automatically function to maintain the water temperature setting for
SPA mode. - POOL
In this mode, the heater will automatically function to maintain the water temperature setting
for POOL mode.

TEMPERATURE LOCK-OUT
- Use the MODE button to put the heater in STANDBY mode.
- Press and hold both the UP and DOWN buttons at the same time.
- After 3 seconds, the thermostat enters maximum temperature lock adjustment mode.
- The SPA indicator light illuminates, and the numeric display shows the current SPA mode maximum
temperature lock setting. - Use the UP and DOWN buttons to set the desired maximum temperature lock setting.
- When finished, press the MODE button.
- The POOL indicator light illuminates, and the numeric display shows the current POOL mode maximum
temperature lock setting. - Use the UP and DOWN buttons to set the desired maximum temperature lock.
- When finished, press the MODE button.
- The heater will return to STANDBY mode.
Fahrenheit Versus Celsius
- TO change the display, use the “MODE” button to place the heater in “STANDBY”.
- Then press and hold the “UP” and “MODE” buttons until the display shows the °F/°C selection.
- Press the “DOWN” button to toggle between selections. To accept the selection, press the “MODE” button.
Winterization
In moderate climates, the heater can continue to operate during short-term cold spells. Do not use the heater to maintain the water temperature just above freezing or for freeze protection. Care must be taken to avoid freeze-up in the heater. When it is used during freezing weather, the pump must run continuously.
SPRING START-UP
- Inspect and clean the heater, being sure the heater is free of leaves and debris prior to startup.
- Turn the filtration system pump “ON” and allow the system to run long enough to purge all the air from the lines.
- Turn the gas supply to the heater “ON”.
- Set the temperature control using the keypad to “POOL” or “SPA” and adjust the set point to the desired temperature setting.
ERROR CODES
| Code | Description | Information |
| bD | Internal fault/power-up error | On initial trial for ignition. Automatic reset is immediate once the gas valve relay check results are acceptable. |
| bD | Gas valve sensed as “ON” error | If the valve is open when it should be closed, he heater will shut down and go into lockout. |
| bD | Gas valve sensed as “OFF” error.. | If an error occurs 10 times during a call for heat, the control will go into lockout. Automatic reset is 60 minutes. |
| bD | Data retrieval error | If the control input ta is corrupted, the heater turns down and goes to lockout. |
| HF | Flame present with gas valve “OFF” error | If flame is sensed with the gas valve, the lockout is triggered. The blower will run until it is or. When corrected, control will run for 5 seconds, automatically restart after 2 minutes. |
| PF | Electrical supply wiring error | This code will display if 120V polarity is ever low voltage detected, the path is insufficient. Reset is immediate after the error is corrected |
| over the vafor switch open error. | If the blower prover switch does not close, the er starts the con l ignition t into lockout. The blower will continue to run. Immediately after the switch closes. | |
| AO | Blower vacuum switch opens when expected to be closed error | If the blower prover switch opens unexpectedly during operation, the control will shut down and pt re-lig e stch does close or the ts, he control will o locut wiwith ower running. |
| AO | Blower vacuum switch open during post-purge error.. | If the blower prover switch opens during the postpurge cycle (heater is not firing), he control will display the code. |
| AC | Blower vacuum switch closed when expected to open error.. | Automatic reset is immediate when the switch opens. |
Limited Warranty (effective 03/01/12)
Hayward warrants its Pro Logic, OnCommand, and E-Command pool automation products as well as its AquaRite, AquaRite Pro, Aqua Plus, and SwimPure chlorination products to be free of defects in materials and workmanship, under normal use and service, for a period of three (3) years. Hayward also warrants its Aqua Trol chlorination products to be free of defects in materials and workmanship, under normal use and service for a period of one (1) year. These warranties are applicable from the initial date of purchase on private residential swimming pools in the US and
Hayward warrants all accessories and replacement parts for the above-identified pool automation and chlorination products for a period of one (1) year. Accessories also include remotes, actuators, base stations, temperature sensors, flow switches, and chemistry probes. Each of these warranties is not transferable and applies only to the original owner.
Hayward shall not be responsible for cartage, removal, repair, or installation labor, or any other such costs incurred in obtaining warranty replacements or repair. If written proof of purchase is not provided, the manufacturing date code will be the sole determinant of the date of installation of the product. To obtain warranty service or repair, please contact the place of purchase or the nearest Hayward authorized warranty service center. For more information on authorized service centers, please contact the Hayward Technical Service Support Center (61 Whitecap Road, North Kingstown, RI, 02852).
Exclusions
- Material supplied or workmanship performed by others in the process of installation.
- Damage resulting from improper installation, including installation on pools larger than the product rating.
- Problems resulting from failure to install, operate, or maintain the product(s) in accordance with the
recommendations contained in the manual (s). - Problems resulting from failure to maintain pool water chemistry in accordance with the recommendations in the manual, problems resulting from tampering, accident, abuse, negligence, unauthorized repairs or alterations, fire, flood, lightning, freezing, external water, degradation of natural stone used in or immediately adjacent to a pool or spa, war, or acts of God.
- Use of a non-genuine Hayward replacement salt chlorination cell on any Hayward automation or chlorination product will void the warranty for that product.
In no event shall Hayward Pool products be responsible for any consequential, special, or incidental damages of any nature.
Some states do not allow a limitation on how long an implied warranty lasts, or the exclusion of incidental or consequential damages, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state.
Customer Service
- Ph: 1-800-657-2287
- Website: www.haywardcommercialpool.com
FAQs
Is the H150FD compatible with both natural gas and propane?
Indeed. There are two types of the H150FD: the H150FDN for natural gas and the H150FDP for propane. Make sure the model you choose matches the type of fuel you use.
What is the heating capacity of the H150FD?
With its 150,000 BTU/hr output, this model is perfect for rapidly warming small to medium-sized pools or spas.
How quickly will it heat my pool or spa?
The size of the pool, the initial temperature, and the temperature of the surrounding air all affect heating time. It can increase the temperature in spas by a few degrees per hour. Pools take longer.
Is it compatible with pool automation systems?
Yes, you can remotely control heating with the H150FD since it interfaces with the majority of Hayward and third-party automation systems.
How do I turn the heater on and set the temperature?
Turn the machine on, choose between pool and spa mode, then adjust the temperature using the LED digital control panel.



