HTP ELU Series Installation Instructions Manual
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HTP ELU Series Installation Instructions Manual

Cascade system, high efficiency condensing wall-hung gas boilers
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Cascade System
Installation Instructions
Included with Kit - Part #9800P-002:
Item #
Description
1
BUS Connectors (p/n 8200300015201)
2
SYS Connector (p/n 820300014600)
3
System Sensor (p/n 7250-324)
4
Instructions (p/n LP-743)
This document is provided in addition to other documentation and DOES NOT REPLACE the installation manual. This document must only be used
by a qualified installer / service technician. Read all instructions in the installation manual before installing. Then, if installing a Cascade System, read
these instructions. Only then proceed with installation. Perform steps in the given order. Failure to do so could result in substantial property damage,
severe personal injury, or death.
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.
The manufacturer reserves the right to make product changes or updates without notice and will not be held liable for typographical errors
in literature.
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.
NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
272 Duchaine Blvd.
ELU and EFTU
High Efficiency Condensing
Wall-Hung Gas Boilers
Quantity
8
1
1
1
DANGER
!
WARNING
!
NOTICE
New Bedford, MA 02745
Heat Exchanger Bears the ASME "H" Stamp
www.htproducts.com
LP-743 Rev. 000 Rel. 000 Date 8.25.20

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Summary of Contents for HTP ELU Series

  • Page 1 ELU and EFTU High Efficiency Condensing Wall-Hung Gas Boilers Cascade System Installation Instructions Included with Kit - Part #9800P-002: Item # Description Quantity BUS Connectors (p/n 8200300015201) SYS Connector (p/n 820300014600) System Sensor (p/n 7250-324) Instructions (p/n LP-743) Heat Exchanger Bears the ASME “H” Stamp DANGER This document is provided in addition to other documentation and DOES NOT REPLACE the installation manual.

  • Page 2: Table Of Contents

    Table of Contents Part 1 - Cascade Water Piping C. Technical Menu - Cascade Master Menu Structure Part 2 - Cascade Control Set-Up D. Technical Menu - Cascade Follower Menu Structure Part 3 - Cascade Wiring E. Complete Cascade Technical Menu Parameters Part 4 - Cascade Controls Part 5 - Troubleshooting A.
  • Page 3 LP-743 Rev. 000 Rel. 000 Date 8.25.20...
  • Page 4 LP-743 Rev. 000 Rel. 000 Date 8.25.20...

  • Page 5: Part 2 - Cascade Control Set-Up

    Part 2 - Cascade Control Set-Up When setting up a cascade system, one boiler must be configured as a Master and the other boilers must be configured as Followers. Establishing Boilers as Master and Followers: NOTE: Disconnect the WiFi PCB on each Follower boiler prior to setting up the cascade system. Only the Master boiler should be connected to WiFi.
  • Page 6 Parameter Description Value Default Setting 68-122°F (when 4.2.0 = 0) 120 (4.2.0 = 0) Maximum CH Temperature Setting (Zone 1 – TT1) 86-179°F (when 4.2.0 = 1) 179 (4.2.0 = 1) 4.2.5 Sets the maximum allowable boiler operating temperature for CH Zone 1, limiting Automatic Temperature Control and manual adjustment from the User Menu.

  • Page 7: Part 3 - Cascade Wiring

    Parameter Description Value Default Setting Emergency Setpoint 68-179°F 113°F 34.10.3 Sets Follower boiler operating temperature when communication with Master is lost. Can also be adjusted via the CH +/- buttons of the respective boiler, while operating in Emergency mode. Table 3 - Critical cascade parameters to be configured at each Follower boiler. See E. Complete Cascade Technical Menu Parameters for a complete list of parameters.
  • Page 8 BUS Network - Communication between cascaded boilers BUS “T” connection to the next BUS “T” connection, and BUS “B” (up to 8) and/or HTP Room Sensors (up to 3) and/or one connection to the next BUS “B” connection. “T” to “T”; “B” to “B”.

  • Page 9: Part 4 - Cascade Controls

    Part 4 - Cascade Controls This screen displays if the master boiler is turned off with the ON/ A. Master Boiler Homescreen Overview OFF button. When viewing the Cascade Master Homescreen, the following screens will appear on the display and alternate every three (3) seconds. Master Homescreen 1 - Overall System Details This screen signifies that this is a master boiler with two (2) followers: A three (3) boiler cascade system.

  • Page 10: Follower Boiler Homescreen Overview

    Follower Homescreen 3 - Boiler Operating Power Level B. Follower Boiler Homescreen Overview This screen displays the current operating power level percentage of When viewing the display on a specific follower boiler the follow- the follower boiler. A power level of 40% is displayed below. ing homescreens will appear and alternate every three (3) seconds.

  • Page 11: Technical Menu - Cascade Master Menu Structure

    Free parameters Only applicable with 0-10V / 4-20mA Reset Factory Settings Clip-In Board installed Other - 1 Other - 2 11 HTP Zone Controller Parameters 0 General 1 Diagnostics Figure 21 - Menu Structure LP-743 Rev. 000 Rel. 000 Date 8.25.20...

  • Page 12: Technical Menu - Cascade Follower Menu Structure

    D. Technical Menu - Cascade Follower Menu Structure Quick Access Menus NETWORK User Interface 34...40 Cascade Follower 1 - 7 Parameters Direct Access to the Parameters: 0 General 34…40.19, 34…40.20, 34…40.28, 1 Free Parameters 34…40.29, 34…40.31-34, 34…40.47, 2 Settings 34…40.53 3 Central Heating-1 4 Central Heating-2 ERR - Fault...

  • Page 13: Complete Cascade Technical Menu Parameters

    E. Complete Cascade Technical Menu Parameters Description Value ACCESS the Complete Menu “+” and “-” buttons for 5 seconds. T 222. Simultaneously press the he display shows 2. Press the “+” button to select 234 , the service code. 3. Press the OK button. PCB.
  • Page 14 Description Value 2 DOMESTIC HOT WATER - Applicable for Downstream / System IWH DHW Setpoint Temperature WCN Models 97 - 140°F DHW Setpoint Temperature WBN Models 104 - 140°F Establishes DHW temperature for the entire cascade system, including WCN boilers and Upstream IWH connected to individual boilers.
  • Page 15 Description Value 1 = Stand-by, 2 = Meeting CH Demand, 5 = CH Temperature Reached, 8 = System Storage Loading, 9 = System Storage Loading Temp Reached, 20 = Pump Antifreeze, 21 = Burn Antifreeze, 27 = Plant Frost Protection with Burner Blocked, 28 = System Tank Frost Protection, 29 = System Antile- 4 Cascade Manager Status gionella Function, 30 = Chimney, 31 = Air Purge, 51 = Lockout Volatile,...
  • Page 16 Description Value Absolute Min boiler power percentage 0 - 100 CANNOT BE MODIFIED 34 - 40 3 Must be set in accordance with parameter 2.3.3 - see boiler Installation Manual. Absolute Max CH percentage 0 - 100 CANNOT BE MODIFIED 34 - 40 3 Must be set in accordance with parameter 2.3.4 - see boiler Installation Manual.
  • Page 17 Description Value 0 = OFF 1 = Functional Heating 2 = Curing Heating 34 - 40 7 Floor drying cycle 3 = Functional Heating + Curing Heating 4 = Curing Heating + Functional Heating 5 = Manual 34 - 40 7 Floor dry Supply setpoint temperature 77 - 140°F Burning Hours Harmonization...
  • Page 18 Description Value 34 - 40 51 4 Average CH Cycle Length (min) 34 - 40 51 6 Number of times the Priority Timer (2.10.4) has elapsed, switching priority from DHW to CH (or vice versa). 34 - 40 52 BOILER STATISTICS - 3 - READ ONLY 34 - 40 52 1 Fan Status 0 = OFF, 1 = ON...

  • Page 19: Part 5 - Troubleshooting

    Repeated Lockout Error conditions could indicate a serious error with the boiler or installation. Failure to contact a qualified service technician to troubleshoot the error could result in substantial property damage, serious personal injury, or death. *Error is resettable remotely via HTP Tele-Diagnostic Service, HTP Remote Contractor. LP-743 Rev. 000 Rel. 000 Date 8.25.20...

  • Page 20: Maintenance Notes

    Maintenance Notes LP-743 Rev. 000 Rel. 000 Date 8.25.20...

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