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HTP SSC-20TC - User Manual

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Superstor
Contender
Indirect Fired Water Heaters
Use and Care Manual
Installation
Start-Up
Maintenance
Parts
Warranty
For Residential and Commercial Use
SSC-20TC, SSC-32TC, SSC-40TC, SSC-50TC Models
The surfaces of these products contacted by potable (consumable) water contain less than 0.25% lead by weight as required by
the Safe Drinking Water Act, Section 1417.
272 Duchaine Blvd New Bedford, MA 02745 www.htproducts.com
lp-770 Rev. 000 Rel. 000 Date 6.21.21
NOTICE
HTP reserves the right to make product changes or updates without notice and will not be held liable for typographical errors
in literature.
NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
WARNING
!
Improper installation, adjustment, alteration, service, or maintenance could void product warranty and cause property
damage, severe personal injury, or death.
California Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer, birth
defects, or other reproductive harm.

Table of Contents

Questions and Answers

Overview

  1. Function Description
  2. Important Technical Specifications
  3. Usage Features
  4. Maintenance Features
  5. Warranty Information

This document is the "Use and Care Manual" for the HTP Superstor Contender Indirect Fired Water Heaters, specifically models SSC-20TC, SSC-32TC, SSC-40TC, and SSC-50TC, intended for both residential and commercial use. The manual provides comprehensive instructions for installation, start-up, maintenance, parts, and warranty information.

Function Description:

The HTP Superstor Contender is an indirect fired water heater designed to provide potable hot water. Unlike direct-fired water heaters that have their own burner, indirect fired water heaters use a heat exchanger coil connected to an external heating source, typically a boiler, to heat the domestic water stored in the tank. This design allows for efficient hot water production by leveraging an existing heating system. The unit is certified for indoor installation only and is not intended for use as a pool heater. It features a durable construction with an emphasis on safety and efficiency, including the use of anode rods to counteract corrosion and a temperature and pressure relief valve for safety. The system is designed to integrate with a boiler's heating loop, using a circulator or zone valve to move heated fluid through the internal coil, which then transfers heat to the domestic water.

Important Technical Specifications:

The manual provides detailed specifications for the different models (SSC-20TC, SSC-32TC, SSC-40TC, SSC-50TC).

  • Tank Capacity:
    • SSC-20TC: 21.2 Gallons
    • SSC-32TC: 31.7 Gallons
    • SSC-40TC: 42.3 Gallons
    • SSC-50TC: 52.9 Gallons
  • Minimum Recommended Power (Boiler Heating Capacity in BTU/Hr Output): Ranges from 75,000 BTU/Hr for the SSC-20TC to 140,000 BTU/Hr for the SSC-50TC to achieve listed first hour ratings.
  • Maximum Working Pressure: 150 PSI for all models.
  • Maximum Temperature: 200°F for all models.
  • Weight (Empty): Ranges from 74.8 lbs (SSC-20TC) to 136.4 lbs (SSC-50TC).
  • Weight (Full): Ranges from 251.4 lbs (SSC-20TC) to 577 lbs (SSC-50TC).
  • Dimensions (Approximate):
    • All models have a diameter (A) of 22".
    • Height (B): Ranges from 28.7" (SSC-20TC) to 54" (SSC-50TC).
    • Circumference (C): Ranges from 27" (SSC-20TC) to 52.25" (SSC-50TC).
  • Heat Exchanger Pressure Drop (ft. hd.):
    • SSC-20TC (5 GPM): 1.2 ft. hd.
    • SSC-32TC (8 GPM): 3.8 ft. hd.
    • SSC-40TC (12 GPM): 7.6 ft. hd.
    • SSC-50TC (12 GPM): 8.8 ft. hd.
  • Water Quality Specifications:
    • Total Hardness: 200 mg/l (12 grains/gallon) for residential use (below 140°F), 120 mg/l (7 grains/gallon) for commercial use (above 150°F).
    • Aluminum: 0.05 to 0.2 mg/l or PPM.
    • Chloride: 100 mg/l or PPM.
    • Copper: 1 mg/l or PPM.
    • Iron: 0.3 mg/l or PPM.
    • Manganese: 0.05 mg/l or PPM.
    • pH: 6.5 - 8.5.
    • Sulfate: 205 mg/l or PPM.
    • Total Dissolved Solids (TDS): 500 mg/l or PPM.
    • Zinc: 5 mg/l or PPM.
    • Dissolved Carbon Dioxide (CO2): 15 mg/l or PPM.
  • Lead-Free Certification: The product surfaces contacted by potable water contain less than 0.25% lead by weight, complying with the Safe Drinking Water Act, Section 1417.

Usage Features:

  • Installation: The water heater must be installed indoors, upright, and on a level surface. Clearances for service access are specified: 24" minimum front clearance and 6" minimum side clearance. A drain pan is required for installations where leakage could cause damage. All plumbing must comply with local codes, using dielectric fittings on water connections and thread tape/pipe dope on mechanical connections. A backflow preventer and a potable expansion tank are often required.
  • Boiler Connections: The heat exchanger is designed for closed-loop boiler systems. A minimum 3/4" nominal pipe size is recommended for piping with zone valves or circulators. The circulator must be sized to meet flow rate requirements, and the boiler supply connects to the circulator outlet, while the boiler return connects to the tank's return side.
  • Hot Water Outlet: A shut-off valve is recommended for ease of service. Installing a heat trap can improve energy efficiency.
  • Domestic Piping Inlet: A shut-off valve is recommended. If replacing a tankless coil, the coil plumbing should be disconnected, and the cold inlet/hot outlet pipes used for the water heater.
  • Temperature and Pressure Relief Valve (T&P Valve): A factory-installed T&P valve is included for safety. The discharge line must be connected to a safe disposal location, be as short as possible, pitch downward, and terminate at least 6" above a floor drain. No valves or obstructions are allowed in the discharge line.
  • Control and Wiring: The control element is installed in a control well. Wiring must comply with local codes, and a disconnect switch is recommended between the boiler control and the water heater. Wiring diagrams are provided for tankless coil boiler applications with circulators and zone valves.
  • Start-Up and Operation:
    1. Fill the water heater by opening the cold water shut-off valve and purging air from the system through a hot water outlet.
    2. Check for leaks and fix them before proceeding.
    3. Flush the system to remove soldering residue.
    4. Initiate a call for hot water and ensure zone valves/circulators operate correctly, purging air from each zone.
    5. Set the water heater aquastat to the desired temperature (factory set to 125°F). A lower temperature (120°F) is recommended to prevent scalding, especially in households with children, disabled, or elderly persons. A thermostatic mixing valve is highly recommended to protect against scalding.
    6. Turn on the boiler and observe operation, ensuring it shuts down once the set point is satisfied.
  • Scalding Risk: Water temperatures over 125°F can cause severe burns. The manual provides a table detailing approximate time/temperature relationships in scalds (e.g., 120°F: >5 minutes; 155°F: ~1 second). A temperature limiting or mixing valve (ASSE 1017 or ASSE 1070 certified) is recommended.

Maintenance Features:

  • Annual Maintenance Activities (Checklist provided):
    • Piping: Check for leaks and proper support.
    • System (Visual): Inspect all components (boilers, water treatment, mixing valves, circulators) for proper operation and maintenance.
    • System (Functional): Test all system functions, verify system pressure, and perform any required maintenance per local codes.
    • Temperatures: Check control for accuracy and verify mixing valve settings.
    • Electrical: Verify smoke/CO detectors are installed and working, change batteries. Check circuit breakers and wire connections.
    • Anode Rod: Inspect annually. To remove: shut off power, close cold water supply, open hot water taps, drain heater, unscrew anodes. Replace if diameter is less than 0.40 inches. Use PTFE tape for watertight connection. More frequent inspection may be needed for certain water conditions. Failure to inspect can lead to premature heater failure and void warranty.
    • Relief Valve: Lift and release the lever annually to ensure it operates properly and discharges freely. Replace if blocked or inoperative. Exercise caution due to scald risk.
    • Drain Valve: Open annually to flush hard water deposits from the tank. Exercise caution due to scald risk.
    • Final Inspection: Check for combustible materials near the heater. Verify completion of the checklist and review with the homeowner.
  • Troubleshooting: A table is provided for common issues like "No Hot Water," "Not Enough Hot Water," "T&P Valve Discharges," and "Hot Water Has Rotten Egg Odor," along with possible solutions. For example, "No Hot Water" could be due to a zone valve not opening, circulator not operating, or control settings being too low. "Not Enough Hot Water" might be caused by a restricted zone valve, reversed circulator, undersized boiler/tank, or air trap in the loop. "T&P Valve Discharges" could indicate high tank temperature, water expansion, or high water pressure. "Rotten Egg Odor" suggests high sulfate or mineral content in the water supply, requiring water quality analysis.

Warranty Information:

  • Standard Residential Use Warranty: 7 years for the tank, 6 years for components. Applies to single-family dwellings where the owner resides permanently and operating temperatures do not exceed 140°F.
  • Extended Residential Use Warranty (Lifetime - Tank, 6 years - Components): Requires online registration with HTP within six months of installation.
  • Standard Commercial Use Warranty: 5 years for the tank, 1 year for components.
  • Coverage: HTP will repair or replace defective/malfunctioning components or the water heater itself. Replacement components are warranted for 90 days. If a replacement is needed, HTP will provide a comparable model.
  • Owner Responsibilities: Install a T&P valve (ASME listed), a vacuum relief valve (ANSI Z21.22 certified), maintain the water heater per instructions, maintain system components, use in an open or closed system with an expansion tank, operate within specified water pressures, keep free of scale, make provisions for leakage, and inspect/replace anode rods.
  • Exclusions: Warranty does not cover units from unauthorized dealers, improper installation, service trips for instruction, workmanship of installer, electricity/fuel costs, water damage from defects, incidental/consequential damages, failure to locate in a safe area, non-HTP components, unauthorized alterations, improper operation/maintenance, vacuum conditions, or use with modified/unapproved components. Water chemistry issues (e.g., lime scale, low pH) and freeze-related damage are also excluded.

HTP SSC-20TC Specifications

General IconGeneral
BrandHTP
ModelSSC-20TC
CategoryWater Heater
LanguageEnglish

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