If this doesn’t resolve the problem, check the transformer by attaching one voltmeter lead to a terminal on the transformer. Another reason for heater failure is insufficient gas supply. Gas volume is low u0007Adjust the gas level/pipe sizing to ensure there is an adequate supply. View and Download Pentair MASTERTEMP 200 HD installation and user manual online. You have to determine where the problem is occurring within the heating system before you can determine how to repair it. Plus, they are certified for low NOx emissions, making them eco-friendly favorites. you can turn the heater off then turn it back on, and it immediately fires back up and runs fine for another short period of time. Measures 36 … When removing the manometer from the test port, replace the gas valve’s test plug before moving on to the next step. You’ll need to also keep an eye on the pool pH levels to extend the lifetime of the heat exchanger. If the manifold pressure is correct (per owner’s manual), the heater problem isn’t related to the gas supply. To increase, turn it clockwise with the heater running and manometer attached. Begin by checking the safety fuse, then the high limit switch and then the pressure switch. We have a Pentair MasterTemp 250, and the gas comes on perfectly. All gas valves have an adjustment screw. This test measures the gas pressure going to the burners. Amazon's Choice for pentair mastertemp 400. Also for: Mastertemp 300 hd, Mastertemp 400 hd. Make sure you turn the gas valve inside the heater cabinet to the “on” position.If the load reading is low, review the steps under the static test. View online or download Pentair MASTERTEMP 400 HD Installation And User Manual Symptom: Scale is forming in the heat exchanger. A noisy heater can also indicate that it is operating after the pump shuts off, and this is related to a faulty pressure switch that needs to be replaced. The valves in most heaters are 3/4-inch connections. Pentair MasterTemp 400 Pool and Spa Heater. 4.7 out of 5 stars 424. View online or download Pentair MASTERTEMP 300 HD Installation And User Manual John F. Ott is a consultant in Southern, Calif. It requires manual gas shut-off while servicing. If the static reading is too low based upon the manufacturer’s data plate found inside the heater cabinet, you will need to inspect the following possibilities: The household gas meter size may be too small. Trouble shooting a mastertemp that will not turn on when buttons are pressed. Service techs can try using three sequential gas pressure tests — static, load and manifold — to correctly identify insufficient gas pressure and its source. Problems and Corrective Action. If it is too small, it will not heat properly. Pool & Spa News: Trends, news, products, design and business strategies for pool and spa professionals. MASTERTEMP™ HEATER INSTALLATION AND USER’S GUIDE P/N 474131 Rev. Heater will not start. Pentair MasterTemp 400 natural gas heater won't ignite. Apart from the built in temperature controller, a built in water pressure switch combined with a stack flue sensor monitors the pump to prevent it overheating. Only used a few years , has many years left!! Attach the manometer to the outlet/ manifold side of the gas valve. Reset the timer to allow the heater to run for a longer period. The blower will go through a cooling cycle and not come on again. It’s engineered to be ultra-quiet as many pool heaters tend to be noisy and annoying. MasterTemp heaters offer all the efficiency, convenience and reliability features you want in a pool heater, plus a lot more. With the local gas cock and heater gas valve off, remove the manometer test fitting from the inlet tap and replace the test plug. If the meter rating is smaller than the heater’s Btu, contact your local gas company to get it upsized or consider downsizing the heater. Renee Miller began writing professionally in 2008, contributing to websites and the "Community Press" newspaper. Fault Condition: HIGH WATER TEMP Alarm: Water temperature above 108°F. Check the shut-off valve on gas heaters to ensure that the valve is open and thus supplying fuel to the heater. MASTERTEMP® Pool and Spa Heater Installation and User’s Guide Rev. There should be a dedicated gas supply line for the heater. service system & service heater lights are off … Manual gas shut-off when service is required; ... MasterTemp 400: Natural: 400: 21x23x28.2: 136: 460737: MasterTemp 400: Propane: 400: 21x23x28.2: 136: 460805: MasterTemp 400HD: ... *Pentair has a trained team of TradeGrade experts and third-party resources that will be scouring the internet 24/7 for TradeGrade violations. Mastertemp 400 Safety Features. Should you still encounter a supply problem, contact the local gas company. It will be able to handle an obstruction in the gas line or any problems with the gas-line regulator if it is damaged or not properly set. appliance. When your swimming pool heater malfunctions, troubleshooting the source of the problem can be more complex than working with filters or pumps. Once the manometer is connected, turn on the local gas cock outside the heater. A drop in static pressure indicates the control loop is closed and the gas valve is open — even if the heater doesn’t fire. (460736)-Compact, quiet, eco-friendly heater for pool or spa. Note: Turn off power to unit prior to attempting service or repair. just installed a Pentair MasterTemp 125 - burners fire and run but then shut off. $18.99 $ 18. Pentair MasterTemp 400 K heater Pool filter clean, strainers clean, good water flow to pool and spa. Make sure you turn the heater on (local gas cock and heater gas valve), along with all appliances attached to the same gas supply. Check the shut-off valve on gas heaters to ensure that the valve is open and thus supplying fuel to the heater. Other options New from $14.57. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. Pentair 42002-0024S Stack Flue Sensor Replacement Pool and Spa Heater Electrical Systems. Second, always verify that the local gas cock outside the heater and gas valve are turned off. If the reading is acceptable, proceed to the manifold test. I turn everything off and start over. Again it will light up, and then the flame will cut out agian. propane MASTERTEMP 200HD / 300HD / 400HD Front View There are two designators for each heater, one is the Model Number and the other is the Heater Identification Number (HIN). There are two designators for each heater, one is the Model Number and the other is the Heater Identification Number (HIN). Clean the filter and set the temperature switch to the ON position at a high enough setting that the heater turns on.