EasyManua.ls Logo

HTP Hydra Smart RT-199 - User Manual

HTP Hydra Smart RT-199
73 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
Hydra Smart
Tankless Water Heaters
Installation
Start-Up
Maintenance
Parts
Warranty
RT-150 / 199* Models
* “LP” Denotes Propane Gas
This manual must only be used by a qualied installer / service technician. Read all instructions in this manual before installing.
Perform steps in the given order. Failure to do so could result in substantial property damage, severe personal injury, or death.
The manufacturer 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.
272 Duchaine Blvd. New Bedford, MA 02745 www.htproducts.com
lp-505 Rev. 000 Rel. 015 Date 1.7.20
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.
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

Other manuals for HTP Hydra Smart RT-199

Preview: Service Manual
Service Manual48 pages
Preview: User's Information Manual
User's Information Manual12 pages

Questions and Answers

  • S
    sheltonangelicaNov 23, 2025
    What to do if ignition has failed multiple times on my HTP Hydra Smart RT-199 Water Heater?
    • T
      Timothy ButlerNov 23, 2025
      If the ignition has failed 10 times on your HTP Water Heater, try the following: First, press the Power button to clear the Error Code (it will also automatically reset after one hour, up to three times). If the error happens again: 1. Monitor the gas pressure to the water heater while in operation, ensuring it's between 3.5 and 14” WC. 2. Check the gas valve wire and flame detection sensor, ensuring connections are secure; normal operating settings for the flame detection sensor are more than 2.5DC before ignition, less than 2.5DC after ignition. 3. Check the igniter transformer for proper connection. 4. Clean the spark igniter with steel wool to remove oxides and ensure proper separation (3-4 mm). Replace the spark igniter if damaged. 5. Assure that the flame is stable when lit. I...
  • D
    Daniel ShawAug 23, 2025
    How to fix HTP Hydra Smart RT-199 if the flame has extinguished multiple times?
    • K
      kimberly24Aug 25, 2025
      If the flame has extinguished 8 times on your HTP Water Heater, try the following: First, press the Power button to clear the Error Code (it will also automatically reset after one hour, up to three times). If the error happens again: * Monitor the gas pressure to the water heater while in operation, ensuring it's between 3.5 and 14” WC. * Check the gas valve wire and flame detection sensor, ensuring connections are secure; normal operating settings for the flame detection sensor are more than 2.5DC before ignition, less than 2.5DC after ignition. * Check vent terminations to ensure there are no blockages. * Assure that the flame is stable when lit. If the problem persists, replace the main control.
  • D
    durhammichaelAug 26, 2025
    Why is my HTP Hydra Smart RT-199 overheating?
    • T
      Tina WilsonAug 27, 2025
      If your HTP Water Heater displays an error due to the operating temperature sensor or DHW sensor detecting water temperature greater than 199oF (93oC), the error code will disappear when the DHW temperature decreases. If the error happens again: * Check if the dip switch High Fire setting is ON (switches 6 and 7 should be OFF for normal operation). * Check if the DHW inlet pipe is blocked, ensuring enough water flows to the water heater. * Check the DHW sensor at the DHW outlet and the Operating Temperature sensor at the heat exchanger; if resistance is zero, replace the sensor. If the problem persists, replace the main control.
  • E
    Emily BlakeAug 27, 2025
    How to troubleshoot high exhaust temperature on HTP Hydra Smart RT-199 Water Heater?
    • M
      Michael GrossAug 27, 2025
      If the exhaust NTC on your HTP Water Heater detects a vent temperature greater than 149oF (65oC) (or 190oF [87.8oC] when the High Temp set point is selected), the Error Code will disappear when the condition is remedied. If the error happens again: 1. Check if the dip switch High Fire setting is ON (switches 6 and 7 should be OFF for normal operation). 2. Check the exhaust temperature sensor, ensuring connections are secure. 3. Check the sensor resistance; if resistance is zero, replace the sensor. 4. Check the exhaust vent for blockage. If the problem persists, replace the control or the heat exchanger.
  • N
    Nicole GarciaAug 28, 2025
    What does 'Fan Speed Feedback Signal Abnormal' mean on my HTP Hydra Smart RT-199?
    • D
      Dennis MitchellAug 28, 2025
      If your HTP Water Heater displays a 'Fan Speed Feedback Signal Abnormal' error, the Error Code will disappear when the condition is remedied. If the error happens again: * Check the connections to the fan, ensuring all are secure. * If the fan does not rotate during the ignition sequence, check for 120V power at the fan connection. If 120V power is present at the control, replace the fan. If the blower does not have 120V power, check power at the control. If 120V power is not present at the control, replace the control. If the problem persists, replace the main control.
  • K
    kingjacobSep 18, 2025
    What does Exhaust Sensor Open or Short mean on HTP Water Heater?
    • T
      tracynelsonSep 19, 2025
      If your HTP Water Heater displays an 'Exhaust Sensor Open or Short' error, this Error Code will disappear when the exhaust temperature decreases. If the error happens again: * Check the exhaust temperature sensor, ensuring connections are secure. * Check sensor resistance; if resistance is zero, replace the sensor. * Check the exhaust vent for blockage. If the problem persists, replace the main control.
  • R
    Ryan LewisSep 16, 2025
    What does Water Outlet Sensor Open or Short mean on HTP Hydra Smart RT-199 Water Heater?
    • M
      mjohnsonSep 16, 2025
      If your HTP Water Heater displays a 'Water Outlet Sensor Open or Short' error, this Error Code will disappear when the outlet water temperature decreases. If the error happens again: * Check the DHW outlet temperature sensor, ensuring connections are secure. * Check sensor resistance; if resistance is zero, replace the sensor. If the problem persists, replace the main control.
  • W
    whitegailSep 18, 2025
    How to troubleshoot H/X Temperature Sensor error on HTP Hydra Smart RT-199?
    • B
      beckbrittneySep 18, 2025
      If your HTP Water Heater displays an 'H/X Temperature Sensor Open or Short' error, this Error Code will disappear when the outlet water temperature decreases. If the error happens again: * Check the operating temperature sensor, ensuring connections are secure. * Check sensor resistance; if resistance is zero, replace the sensor. If the problem persists, replace the main control.
  • S
    salaskennethSep 8, 2025
    How do I fix a Flue APS fault on my HTP Hydra Smart RT-199?
    • M
      Madison MccoySep 8, 2025
      If your HTP Water Heater displays a 'Flue APS - Closed is Normal, Open is Fault (Condensate Drain Trap)' error, press the Power button to clear the Error Code. Then: * Check FLUE APS and main controller connections, ensuring all are secure. * Check FLUE APS resistance; if resistance is zero, replace the switch. * Check the FLUE APS hose, ensuring it is connected and in good condition. * Check the exhaust vent for blockages. If the problem persists, replace the main control.
  • A
    Antonio ThompsonSep 5, 2025
    What to do if my HTP Hydra Smart RT-199 Water Heater shows a 'Poor Communication' error?
    • A
      Austin BishopSep 5, 2025
      If your HTP Water Heater displays a 'Poor Communication' error, the Error Code will disappear when the condition is remedied. If the error happens again: * Check connections from the main control to the display panel. If the problem persists, replace the display and/or the main control.

Summary

Foreword

For the Installer

Installations Must Comply With

Lists codes, laws, and regulations for installation.

Part 1 - General Safety Information

A. Operation and Installation Warnings

Crucial safety precautions for operation and installation.

B. Improper Combustion

Information on consequences of improper combustion and air supply.

C. Gas

Instructions for gas supply issues and shut-off valve operation.

D. When Servicing the Water Heating System

Safety guidelines and precautions when servicing the unit.

E. Water Chemistry Requirements

Details on water quality and its impact on appliance function.

F. Freeze Protection

Information on the water heater's freeze protection system.

G. Water Temperature Adjustment and Scalding

Guidance on setting temperature to prevent scalding injuries.

H. High Elevation Installations

Specific considerations for installing the unit at high altitudes.

Part 2 - Before You Start

A. Whats in the Box

Lists all components included with the water heater.

B. Optional Equipment

Details optional accessories available for purchase.

Part 3 - Prepare the Water Heater Installation

A. Locating the Water Heater

Guidelines for selecting a suitable and safe installation location.

B. Leveling

Instructions on ensuring the water heater is installed level.

C. Clearances for Service Access

Specifies minimum clearances required for maintenance.

D. Residential Garage and Closet Installations

Specific precautions for garage and closet installation locations.

E. Exhaust Vent and Intake Pipe

Requirements for the direct vent system and its components.

F. Carbon Monoxide Detectors

Mandates and recommendations for CO detector installation.

G. Prevent Combustion Air Contamination

Guidance on ensuring clean combustion air intake.

H. Removing a Heater from a Common Vent System

Procedures for safely removing an old heater from a shared vent.

J. Wall-Mounting

Instructions and warnings for securely mounting the unit to a wall.

I. Technical Specifications

Part 4 - Water Piping

A. General Plumbing Guidelines

Basic principles and best practices for water piping connections.

B. Backflow Preventer

Requirements and installation of a backflow preventer.

C. Potable Expansion Tank

Explains the need for and installation of an expansion tank.

D. Piping the Water Heater

Specifics on connecting water lines to the heater.

E. Applications

Illustrates various piping configurations and symbols.

F. Circulator Sizing

Tables and charts for sizing circulators based on pressure drop.

G. Pressure Relief Valve

Guidelines for installing and testing the pressure relief valve.

Part 5 - Venting

A. General

Overview of venting requirements for Category IV appliances.

B. Approved Materials for Exhaust Vent and Intake Pipe

Lists acceptable materials and standards for vent systems.

C. Additional Requirements for Installation in Canada

Specific venting regulations applicable to Canada.

D. Exhaust Vent and Intake Pipe Location

Details on required clearances for vent termination points.

E. Exhaust Vent and Intake Pipe Sizing

Guidance on calculating vent pipe diameter and length.

F. Tightening Water Heater Collar to Exhaust Vent and Intake Pipe

Instructions for securely connecting vent pipes to the appliance.

G. Exhaust Vent and Intake Pipe Installation

Procedures and precautions for installing vent and intake piping.

H. Applications

Illustrates various vent termination configurations and kits.

2. Venting Through an Existing System

Methods for venting through existing systems like concentric or chase.

3. Power Venting, Indoor Combustion Air in Confined or Unconfined Space

Requirements for using indoor air for combustion.

I. Common Vent Piping - 199 Model in Cascade Applications Only!

Guidelines for common venting multiple 199 model units.

2. Recommended Exhaust Pipe Transitions

Proper methods for transitioning vent pipes between components.

3. Two (2) Pipe Common Direct Vent Systems

Typical direct venting configurations for common systems.

Part 6 - Installing the Condensate Drain

Part 7 - Connecting Electrical Service

A. Wiring

Guidelines for safe and correct electrical wiring connections.

B. Dip Switches

Configuration of DIP switches for normal operation.

C. Wiring a Cascaded System

Instructions for connecting multiple units in a cascade system.

Part 8 - Gas Connections

A. Gas Pipe Sizing Tables

Charts for determining appropriate gas pipe sizes based on capacity.

B. Gas Connection Requirements

Essential steps and safety checks for gas line connections.

C. Additional Precaution for Excess Flow Valve (EFV)

Important considerations for installing and using an EFV.

D. Checking Gas Pressure at the Water Heater for Proper Operation

Procedures for verifying correct gas pressure levels.

E. Setting and Verifying the Combustion Setting

Steps for adjusting and verifying combustion parameters.

Part 9 - Controls

A. Control and Display Overviews

Explanation of control panel layout and display functions.

B. Start-Up Sequence

Describes the initial power-up sequence and display indicators.

C. Changing the DHW Set-Point

How to adjust the domestic hot water temperature setting.

D. Changing the Temperature Indicator

Method to switch temperature display between Celsius and Fahrenheit.

E. Status Display

Information on accessing and interpreting various operational statuses.

F. Installer Mode

Accessing and using the installer-specific settings and diagnostics.

G. Setting Up a Cascaded System

Steps for configuring multiple water heaters to work together.

Part 10 - Troubleshooting

A. Error Code

Lists error codes and their possible causes and remedies.

B. Error Tree Analysis

Flowcharts to diagnose specific error conditions like flame detection.

C. Suggested Corrective Actions

Provides solutions for common operational problems and symptoms.

Part 11 - Installation Checklist

Part 12 - Maintenance

Part 13 - Replacement Parts

Limited Warranty for Tankless Water Heaters

Customer Installation Record Form

HTP Hydra Smart RT-199 Specifications

General IconGeneral
BrandHTP
ModelHydra Smart RT-199
CategoryWater Heater
LanguageEnglish

Related product manuals