What to do if water pressure is too high in my HTP SSC-35?
- TTimothy Taylor MDAug 22, 2025
If the water pressure is too high, install a pressure reducing valve.
What to do if water pressure is too high in my HTP SSC-35?
If the water pressure is too high, install a pressure reducing valve.
What to do if my HTP SSC-35 has no hot water?
If your HTP Water Heater isn't producing any hot water, several factors could be the cause. These include a zone valve not opening (check or replace), a circulator not operating (check or replace), a tank control set too low (raise tank temperature), a boiler control set too low (raise boiler temperature), incorrect wiring (recheck wiring), a tank control failure (replace control), or an air trap in the loop (purge air).
Why is my HTP SSC-35 Water Heater not producing enough hot water?
There could be several reasons why your HTP Water Heater isn't providing enough hot water. These include a zone valve restriction (replace zone valve with a 1” full bore), a reversed circulator arrow (reverse the circulator), or a boiler temperature that is too low (raise the boiler temperature). Other potential causes are: the boiler or tank being too small (check sizing chart), a demand flow rate that is too high (check sizing chart), an air trap in the loop (purge to remove air), the heat and tank coming on together (recheck wiring or coincidence), not enough space heat (boiler sized too small - consult chart), or a slow recovery (circulator head capacity too low).
How to solve zone valve not opening in my HTP Water Heater?
To solve the issue of the zone valve not opening, open it manually to replace it.
What to do if circulator fails in my HTP SSC-35?
If the circulator fails, replace the circulator.
What to do if tank control fails in my HTP SSC-35?
If the tank control fails, replace the control.
What to do if zone valve fails in my HTP Water Heater?
If the zone valve fails, replace the valve.
What to do if water expands when heated in my HTP SSC-35 Water Heater?
If water expands when heated, install an expansion tank.
How to fix air trap in loop of my HTP SSC-35?
To fix an air trap in the loop, purge the air.
What to do if circulator is not operating in my HTP SSC-35?
If the circulator is not operating, check or replace it.
This manual describes the HTP Superstor Contender Indirect Fired Water Heater, a device designed for residential and commercial hot water applications. It is intended for indoor installation only and must be installed by a qualified and licensed professional. The water heater operates by utilizing a boiler's heat to warm domestic water, offering an efficient way to provide hot water.
The HTP Superstor Contender is an indirect-fired water heater, meaning it uses a heat exchanger to transfer heat from a boiler's closed-loop hydronic system to the potable domestic water supply. This design allows the water heater to leverage an existing heating system, such as a boiler, to produce hot water without requiring its own dedicated burner. The boiler's hot water circulates through a coil within the water heater tank, heating the domestic water stored inside. A surface-mounted control, factory-set at 120°F (with a fixed differential of 3-5°F), regulates the water temperature. This control ensures that the water heater calls for heat from the boiler when the domestic water temperature drops below the set point. The system is designed to be integrated with various boiler setups, including those with zone valves or circulators, as illustrated in the wiring diagrams. It can also be installed in multiple tank configurations for high-demand applications. The water heater is equipped with a temperature and pressure (T&P) relief valve, which is a critical safety device designed to discharge water if either the temperature or pressure within the tank exceeds safe limits. A magnesium anode rod is also included, serving as a sacrificial component to protect the tank from corrosion caused by water chemistry.
The water heater is designed for continuous hot water supply, making it suitable for various domestic and commercial needs. When filling the water heater, it is crucial to open a hot water tap to release air from the tank and piping to ensure proper operation and prevent damage. The control allows for temperature adjustment, though users are cautioned about scalding risks at higher temperatures. For settings above 120°F, an ASSE 1017 rated mixing valve is mandatory to prevent severe burns, especially in households with small children, disabled, or elderly persons. The manual emphasizes that the water heater should only be used for its intended purpose, as described, to avoid voiding the product warranty. It is also important to ensure that the boiler's high limit is set at least 20°F higher than the water heater's desired temperature to allow for proper heat transfer. The low limit of the boiler control should be set to its minimum to ensure the burner only activates when the tank control calls for heat. The system should be flushed after installation to remove any soldering residue, which can corrode stainless steel components.
Regular maintenance is crucial for the safe and efficient operation of the HTP Superstor Contender. The manual outlines an annual maintenance checklist that should be performed by a qualified service technician. This includes:
The manual also provides troubleshooting guidance for common issues such as no hot water, not enough hot water, T&P valve discharges, and rotten egg odor in hot water, offering possible solutions for each. It emphasizes that failure to adhere to maintenance guidelines can result in property damage, severe personal injury, or death.
| Brand | HTP |
|---|---|
| Model | SSC-35 |
| Category | Water Heater |
| Language | English |








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