2
Hazard definitions
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels
or to important information concerning the life of the product.
DANGER
WARNING
CAUTION
CAUTION
NOTICE
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
avoided, may result in property damage.
NOTICE indicates special instructions on installation, operation, or maintenance that are important but not
related to personal injury or property damage.
HAZARD DEFINITIONS
.................................................... 2
PLEASE READ BEFORE PROCEEDING
........................ 3
1. GENERAL INFORMATION
Operating Restrictions ........................................................ 4
Single-Wall Heat Exchanger .............................................. 4
2. PRE-INSTALLATION
Locating the Tank ............................................................... 5
Recommended Clearances ................................................ 5
3. BOILER SIDE PIPING
Zone with Circulator to Aquastat ........................................ 6
Zone with Valve to Aquastat .............................................. 6
DHW Prioritization .............................................................. 6
Multiple Tank Connections (Boiler Side) ............................ 6
Table 3A - Pressure Drop Chart ................................... 6
Table 3B - Pressure Drop Values ................................. 6
Piping Diagrams ............................................................ 7-10
4. DOMESTIC SIDE (TANK) PIPING
Basic Domestic Piping ................................................. 11
Multiple Tank Domestic Water Piping .......................... 11
Domestic Water Piping for Distant Fixtures .................. 11
Anti-scald Valves (Mixing Valves) ............................. 12
Install Drain Valve ...................................................... 12
Temperature and Pressure (T&P) Relief Valve .......... 12
Table 4A - Minimum Relief Valve (AGA Rating) ... 13
5. WIRING
Indirect Water Heater Sensor Setup (Knight Boiler) ........ 15
Install and Connect Tank Sensor ............................... 15
Indirect Water Heater Controlled Using Aquastat and
Zone Circulator ................................................................. 16
6. START-UP AND CHECK-OUT
.................................. 17
7. MAINTENANCE
Maintenance Schedule ..................................................... 18
To Fill the Water Heater ............................................. 18
To Drain the Water Heater ......................................... 18
8. PERFORMANCE DATA
IBR Chart.......................................................................... 19
How to Properly Size Your Indirect Water Heater ........... 20
Performance Data Charts ........................................... 21-23
REVISION NOTES
............................................ Back Cover
Contents
