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Technical Specifications
Installation &
Maintenance Manual
30 - 4 0 - 50 - 6 0 - 80 - 10 0
INDI RECT FI RE D WATER HEATE R
WARNING
This document is intended to be used
by a factory trained and qualified
heating contractor or service technician
only. Read all Instructions within this
document and within the relevant Boiler
Installation and Maintenance Manual
before proceeding. It is recommended
to follow the procedures in the steps
given. Skipping or missing procedural
steps could result in substantial property
damage, serious injury, or death.
•
When receiving the CARDINAL unit, any claims for damage or shortage in shipment must be filed
immediately against the transportation company by the consignee.
•
Customer must register unit within sixty (60) days of installation in order to gain warranty coverage.
See Warranty Card for details.
•
Leave all documentation received with appliance with the owner for future reference.
•
Installation and service should only be performed by a qualified installer or service technician.
•
Installations and service should be performed by a licensed plumber or gas fitter in the Common-
wealth of Massachusetts.
A1009090-661A0500_EN ■ A - 2023
CTMAN02
Low Lead Content
NSF/ANSI 372
•
The heat transfer medium must be
water or other nontoxic fluid hav-
ing a toxicity rating or class of 1, as
listed in Clinical Toxicology of Com-
mercial Products, 5th edition.
•
The pressure of the heat transfer
medium must be limited to a max-
imum of 30 psig by an approved
safety or relief valve.
NOTICE
CAUTION
O R I G I N A L
I N N O V A T O R S
T H E
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Table of Contents
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Summarization of Contents
Product and Safety Information
Important Safety Information for Homeowner and Installer
Critical safety instructions for installation, operation, and maintenance of the appliance.
Definitions
Clarifies terminology used in the manual to highlight hazards and important information.
Pre-Installation Guidelines
Codes Compliance and Restrictions
Adherence to local, state, and national codes, including heat transfer medium and pressure limits.
Operating and Water Quality Restrictions
Defines operational limits and requirements for domestic and boiler water quality.
Glycol Usage and System Considerations
Guidelines for using glycol, including type, concentration, and potential effects on performance.
Water Heater Location and Clearances
Recommendations for optimal placement and necessary space around the unit for service.
Installation - Piping
Pressure Relief and Safety Devices
Installation of T&P relief valve and vacuum breaker for system safety.
Water Supply and Drainage
Procedures for drain valve installation and managing thermal expansion.
Piping and System Integrity
Preventing water hammer, general piping practices, domestic connections, and boiler piping.
System Configuration and Control
Setup for mixing valves, recirculation, and multiple water heater systems.
Installation - Wiring
Temperature Sensor and Drywell Installation
Steps for installing the temperature sensor and its protective drywell for accurate readings.
Thermostat (Aquastat) Setup
Instructions for installing and setting the aquastat to control tank temperature.
Water Heater Start-Up Procedures
Filling the Coil and Tank
Comprehensive steps for filling both the boiler (coil) and domestic water sides of the unit.
Adjusting Water Temperature Settings
How to set and verify the desired water temperature using controls.
Water Heater Maintenance
Annual and Monthly Maintenance Schedules
Outlines required annual service by technicians and monthly checks for homeowners.
Draining Procedures
Detailed instructions for draining domestic water and boiler water sides of the unit.
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