IDEAL EXALT Solo 110 Instruction Manual

• To maintain the safety & longevity of
your appliance, read and follow the
maintenance schedule information
throughout this manual.
• If the information in this manual
is not followed exactly, a fire or
explosion may result causing
substantial property damage, serious
injury, or death.
FOR YOUR SAFETY
• Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
• WHAT TO DO IF YOU SMELL GAS
- Do not try to light any appliance
- Do not touch any electrical switch;
do not use any phone in your
building.
- Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
- If you cannot reach your gas supplier,
call the fire department.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
WARNING
- Customer must register unit within thirty (30)
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.
NOTICE
INSTALLATION &
MAINTENANCE MANUAL
EXALT Solo 110-155-199 & EXALT Combi 155-199
225296 A02 - August 2020
2019-28

INTENTIONALLY LEFT BLANK

iii
TABLE OF CONTENTS
PRODUCT AND SAFETY INFORMATION.......................................................................... XI
CHAPTER 1 - PRE-INSTALLATION REQUIREMENTS ........................................................ 1
1.1. EXALT Boilers - Code Compliance ................................................................................................ 1
1.1.1 Code Restrictions .................................................................................................................. 1
1.1.2 Operating Restrictions.......................................................................................................... 1
1.2. Determining Product Location.......................................................................................................2
1.3. Boiler Freeze Protection Feature ...................................................................................................2
1.4. Boiler Replacement.........................................................................................................................2
1.5. Recommended Clearances............................................................................................................3
1.6. Residential Garage Installations ....................................................................................................3
CHAPTER 2 - COMBUSTION AIR & VENTING ................................................................... 5
2.1. Combustion Air Contamination.....................................................................................................5
2.2. Ventilation and Combustion Air Requirements - Direct Vent......................................................6
2.3. Ventilation and Combustion Air Requirements - Category IV.....................................................6
2.4. Methods of Accessing Combustion Air Into A Space - Category IV ...........................................7
2.4.1. Indoor Combustion Air.......................................................................................................... 7
2.4.2. Outdoor Combustion Air.......................................................................................................7
2.4.3 Combination of Indoor and Outdoor Combustion Air ......................................................8
2.5. Combustion Air and Vent Piping....................................................................................................8
2.6. Removal of an Existing Boiler from a Common Vent System......................................................9
2.7. Carbon Monoxide Detector Installation ......................................................................................10
2.8. Commonwealth of Massachusetts Installation Requirements .................................................10
2.8.1 Installation of Carbon Monoxide Detectors. ......................................................................10
2.8.2 Approved Carbon Monoxide Detectors. ...........................................................................10
2.8.3 Signage .................................................................................................................................11
2.8.4 Inspection. ............................................................................................................................11
2.8.5 Manufacturer Requirements - Gas Equipment Venting System Provided. ....................11
2.8.6 Manufacturer Requirements - Gas Equipment Venting System Not Provided. .............11
CHAPTER 3 - UNIT PREPARATIONS ................................................................................ 13
3.1. Handling Instructions ...................................................................................................................13
3.2. Wall Mounting Installation ............................................................................................................ 13
3.3. Accessories ...................................................................................................................................13
3.4. Wall Mounting Guidelines ............................................................................................................. 14
3.5. Stud Walls - Installation ............................................................................................................... 14
3.6. Wall Bracket Installation - Solid Walls.......................................................................................... 14
3.7. Boiler Mounting............................................................................................................................. 14

iv
TABLE OF CONTENTS
CHAPTER 4 - BOILER PIPING ........................................................................................... 15
4.1. General Piping Requirements ...................................................................................................... 15
4.2. Pressure Relief Valve .................................................................................................................... 15
4.3. Boiler Air Vent................................................................................................................................ 16
4.4. Low Water Cutoff Device .............................................................................................................. 16
4.5. Additional Limit Control................................................................................................................ 17
4.6. Backflow Preventer....................................................................................................................... 17
4.7. EXALT Solo Boiler System Piping................................................................................................ 17
4.7.1 Expansion Tank and Makeup Water................................................................................... 18
4.7.2 Diaphragm Expansion Tank................................................................................................ 18
4.7.3 Closed-Type Expansion Tank .............................................................................................. 18
4.7.4 Circulator.............................................................................................................................. 19
4.7.5 Sizing Primary Piping .......................................................................................................... 19
4.7.6 Domestic Hot Water System Piping................................................................................... 19
4.7.7 System Piping – Zone Circulators...................................................................................... 19
4.7.8 System Piping – Zone Valves ............................................................................................. 19
4.7.9 System Piping – Through Boiler ........................................................................................ 19
4.7.10 System Piping – Radiant Heating ...................................................................................... 19
4.7.11 System Piping – Special Application ................................................................................. 21
4.7.12 System Piping – Multiple Units Installation ...................................................................... 21
4.8. EXALT Combi Boiler System Piping ............................................................................................ 21
4.8.1 Expansion Tank and Makeup Water...................................................................................22
4.8.2 Diaphragm Expansion Tank................................................................................................22
4.8.3 Circulator..............................................................................................................................22
4.8.4 Sizing Primary Piping..........................................................................................................23
4.8.5 System Piping – Zone Circulators......................................................................................23
4.8.6 System Piping – Zone Valves .............................................................................................23
4.8.7 System Piping – Through Boiler ........................................................................................23
4.8.8 System Piping – Radiant Heating ......................................................................................23
4.8.9 System Piping – Special Application .................................................................................23
4.9. Optional System Piping and Cascading ..................................................................................... 23

v
TABLE OF CONTENTS
CHAPTER 5 - EXALT COMBI UNITS - DOMESTIC PIPING ............................................. 27
5.1. Domestic Piping Pressure Relief Valve........................................................................................27
5.1.1 Standard Installation...........................................................................................................27
5.1.2 Pressure Relief Valve - Standard Installations ..................................................................27
5.1.3 Pressure Relief Valve Discharge Piping .............................................................................27
5.2. Thermal Expansion ...................................................................................................................... 28
5.3. Water Hammer............................................................................................................................. 29
5.4. Vacuum Breaker........................................................................................................................... 29
5.5. Hydro-Block.................................................................................................................................. 29
5.6. General Piping .............................................................................................................................. 29
5.7. Thermostatic Mixing Valve.......................................................................................................... 29
CHAPTER 6 - INSTALLING VENT/COMBUSTION AIR & CONDENSATE DRAIN .......... 37
6.1. Installing Vent and Combustion Air .............................................................................................37
6.2. Installing Condensate Drain Assembly into EXALT Solo Units .................................................37
CHAPTER 7 - GAS PIPING .................................................................................................39
7.1. Gas Supply Piping Connection.................................................................................................... 39
7.2. Natural Gas................................................................................................................................... 40
7.2.1 Pipe Sizing........................................................................................................................... 40
7.2.2 Supply Pressure Requirements ........................................................................................ 40
7.3. Propane Gas .................................................................................................................................. 41
7.3.1 Pipe Sizing............................................................................................................................ 41
7.3.2 Supply Pressure Requirements ......................................................................................... 41
CHAPTER 8 - WIRING ........................................................................................................45
8.1. Internal Wiring .............................................................................................................................. 45
8.1.1 General Requirements ....................................................................................................... 45
8.1.2 Fuse Locations.................................................................................................................... 45
8.2. External Wiring............................................................................................................................. 48
8.2.1 General Requirements ....................................................................................................... 48
8.2.2 Line Voltage Connections.................................................................................................. 48

vi
TABLE OF CONTENTS
8.3. External Wiring - EXALT Solo Units ............................................................................................ 48
8.3.1 Circulator Wiring................................................................................................................. 48
8.3.2 Low Voltage Connections .................................................................................................. 49
8.3.3 Thermostat Wiring ............................................................................................................. 49
8.3.4 Outdoor Sensor Wiring ...................................................................................................... 49
8.3.5 Domestic Hot Water Wiring ............................................................................................... 49
8.3.6 Additional Boiler Limits...................................................................................................... 49
8.3.7 External Modulation Control ............................................................................................. 50
8.3.8 System Sensor Wiring........................................................................................................ 50
8.3.9 Cascade Wiring - Optional ................................................................................................. 50
8.3.10 Modbus................................................................................................................................ 50
CHAPTER 9 - CTRLMAX OPERATION .............................................................................. 51
9.1. CTRLMax Navigation .................................................................................................................... 51
9.2. CTRLMax Menu Structure........................................................................................................... 52
9.3. Home Screen................................................................................................................................ 53
9.4. Status Line Messages.................................................................................................................. 54
9.5. Main Menu .................................................................................................................................... 55
9.6. EZ Setup ....................................................................................................................................... 55
9.7. Heating EZ Setup ................................................................................................................ 56
9.7.1 Select CH Demand (No outdoor sensor connected) ...................................................... 56
9.7.2 Select CH Demand (Outdoor sensor connected).............................................................57
9.8. Domestic Hot Water EZ Setup - EXALT Solo Units.......................................................... 58
9.9. Domestic Hot Water EZ Setup - EXALT Combi Units ...................................................... 59
9.10. Altitude Setup............................................................................................................................... 59
9.11. EZ Setup Reset ................................................................................................................... 60
9.12. Display EZ Setup .................................................................................................................. 60
9.13. CH/DHW Operation .............................................................................................................61
9.14. Boiler Information ................................................................................................................. 61
9.14.1 Information Items............................................................................................................... 62
9.14.2 Lockout Screen................................................................................................................... 63
9.14.3 Manual Reset Lockouts...................................................................................................... 64
9.14.4 Automatic Reset Blocking Lockouts................................................................................. 65

vii
TABLE OF CONTENTS
CHAPTER 10 - START-UP PREPARATION ........................................................................67
10.1. Boiler System Fluid Requirements ..............................................................................................67
10.1.1 Boiler Fluid pH Level 6.0 to 8.0 ..........................................................................................67
10.1.2 Boiler Fluid Hardness Less Than 7 Grains.........................................................................67
10.1.3 Chlorinated Water ...............................................................................................................67
10.1.4 Flush Boiler to Remove Sediment......................................................................................67
10.1.5 Cleaning of Old Boiler/System: .........................................................................................67
10.1.6 Cleaning of New Boiler/System: .......................................................................................67
10.1.7 Check and Test Antifreeze................................................................................................. 68
10.1.8 Use of Antifreeze in the Boiler System ............................................................................. 68
10.2. Filling the Boiler System .............................................................................................................. 69
10.3. EXALT Combi Water Heater - Water Requirements.................................................................. 69
10.3.1 Filling the Domestic Circuit................................................................................................ 69
10.4. Check Low Water Cut-Off Device................................................................................................ 69
10.5. Check For Gas Leaks ................................................................................................................... 70
10.6. Check Thermostat Circuit ........................................................................................................... 70
10.7. Inspect Condensate Drain Assembly ......................................................................................... 70
CHAPTER 11 - START-UP PROCEDURES ..........................................................................71
11.1. Final Checks Before Start-Up....................................................................................................... 71
11.2. EXALT Start-Up ............................................................................................................................. 71
11.3. Check the EXALT and System ..................................................................................................... 71
11.3.1 Check Boiler Piping. ............................................................................................................ 71
11.3.2 Check Vent and Combustion Air Piping............................................................................. 71
11.3.3 Check Gas Piping................................................................................................................. 71
11.3.4 Verify Flame Pattern and Combustion ..............................................................................73
11.3.5 Measure Input - Natural Gas Only......................................................................................74
11.3.6 Test High Temperature Limit..............................................................................................74
CHAPTER 12 - OUTDOOR RESET CONTROL................................................................... 75
12.1. Mounting the Outdoor Sensor .....................................................................................................75
12.2. Wiring the Sensor..........................................................................................................................75
CHAPTER 13 - EXTERNAL MODULATING CONTROL ..................................................... 77
13.1. Wiring the Modulating Controller.................................................................................................77
13.2. CTRLMax Programming...............................................................................................................77
13.3. Programming of External Modulating Control............................................................................77
CHAPTER 14 - CHECK-OUT PROCEDURES .....................................................................79
CHAPTER 15 - INSTALLATION RECORD .......................................................................... 81

viii
TABLE OF CONTENTS
CHAPTER 16 - MAINTENANCE SCHEDULES...................................................................83
16.1. Service Technician ....................................................................................................................... 83
16.2. Owner Maintenance..................................................................................................................... 83
CHAPTER 17 - MAINTENANCE PROCEDURES ............................................................... 84
17.1. Service Technician Maintenance Procedures ........................................................................... 84
17.2. Reported Problems...................................................................................................................... 84
17.3. Check Surrounding Area ........................................................................................................... 84
17.4. Inspect Burner Area..................................................................................................................... 84
17.5. Check System Piping ................................................................................................................... 84
17.6. Clean Condensate Drain Assembly ............................................................................................ 84
17.7. Check Ventilation Air Openings .................................................................................................. 85
17.8. Inspect Vent and Combustion Air Piping ................................................................................... 85
17.9. Check Boiler System.................................................................................................................... 85
17.10. Check Expansion Tank................................................................................................................. 85
17.11. Check Boiler Relief Valve ............................................................................................................. 85
17.12. Inspection of Ignitor..................................................................................................................... 85
17.13. Check Ignition Cable and Ground Wiring ................................................................................... 86
17.14. Check Control Wiring................................................................................................................... 86
17.15. Check Control Settings ............................................................................................................... 86
17.16. Perform Start-up and Checkout Procedures............................................................................. 86
17.17. Check Burner Flame .................................................................................................................... 86
17.18. Check Flame Signal...................................................................................................................... 86
17.19. Check Combustion Levels............................................................................................................87
17.20. Check Flue Gas Temperature.......................................................................................................87
17.21. Clean Heat Exchanger ..................................................................................................................87
17.22. Check Carbon Monoxide Detectors ............................................................................................87
17.23. Review With Owner .......................................................................................................................87
17.24. Torque Specifications Table .........................................................................................................87
CHAPTER 18 - REPLACEMENT PARTS.............................................................................88
CHAPTER 19 - PRODUCT SPECIFICATIONS.................................................................. 101

ix
INDEX OF ILLUSTRATIONS AND TABLES
Fig. 1 - All Combustion Air from Adjacent Indoor Spaces through Indoor Combustion Openings ......7
Fig. 2 - All Combustion Air from Outdoors Through One Permanent Air Opening ...............................7
Fig. 3 - All Combustion Air from Outdoors Through Ventilated Attic .....................................................8
Fig. 4 - All Combustion Air from Outdoors Through Horizontal Ducts...................................................8
Fig. 5 - Accessories................................................................................................................................... 13
Fig. 6 - EXALT Pressure Relief Valve, Drain Valve, T&P Gauge Installation.......................................... 15
Fig. 7 - Piping Component Legend .......................................................................................................... 16
Fig. 8 - EXALT Solo Near Boiler Piping - Hydraulic Separator............................................................... 17
Fig. 9 - Near Boiler Piping - Closely Spaced Tees...................................................................................18
Fig. 10 - 3 Boiler Cascade, 1 System Pump, 1 CH Pump and 1 DHW Pump......................................... 20
Fig. 11 - EXALT Combi Near Boiler Piping - Hydraulic Separator.......................................................... 21
Fig. 12 - EXALT Combi Near Boiler Piping -Timesaver Manifold .......................................................... 22
Fig. 13 - EXALT Combi System Piping - Zoning w Valves..................................................................... 24
Fig. 14 - EXALT Combi - System Piping - Multi Zone Valve - Single Circulator................................... 25
Fig. 15 - EXALT Combi - System Piping - Single Zone with Single Circulator ................................... 26
Fig. 16 - Standard Installation of the Domestic Pressure Relief Valve..................................................27
Fig. 17 - EXALT Combi - Hydro-block Flow Diagram ............................................................................. 28
Fig. 18 -
EXALT Combi Domestic Piping - Single Zone System with Single System/Boiler Circulator ... 30
Fig. 19 - Multiple Zones - Panel Wiring with Circulators........................................................................ 31
Fig. 20 - EXALT Combi System Piping - Multiple Zones - Panel Wiring with Valves.......................... 32
Fig. 21 - EXALT Solo System Piping - Multi Zone Valves - Single Circulator....................................... 33
Fig. 22 - EXALT Solo System Piping - Single Zone System - Single Circulator .................................. 34
Fig. 23 - EXALT Solo - Cascade Piping .................................................................................................. 35
Fig. 24 - Condensate Drain Assembly ................................................................................................... 38
Fig. 25 - Recommended Gas Supply Piping .......................................................................................... 39
Fig. 26 - Gas Valve / Venturi Assembly - EXALT Solo 110 ................................................................... 42
Fig. 27 - Gas Valve / Venturi Assembly - EXALT Solo/Combi 155 ....................................................... 42
Fig. 28 - Gas Valve / Venturi Assembly - EXALT Solo/Combi 199....................................................... 43
Fig. 29 - CTRLMax Control Module Fuse Location ............................................................................... 45
Fig. 30 - EXALT Solo Boiler Factory Wiring ........................................................................................... 46
Fig. 31 - EXALT Combi Boiler Factory Wiring..........................................................................................47
Fig. 32 - Terminal Strip Location............................................................................................................ 48
Fig. 33 - Low Voltage Connections ......................................................................................................... 49
Fig. 34 - CTRLMax User Interface ........................................................................................................... 51
Fig. 35 - Throttle Screw Location ............................................................................................................73
Fig. 36 - EXALT Solo Jacket Components ............................................................................................ 88
Fig. 37 - EXALT Combi Jacket Components.......................................................................................... 89
Fig. 38 - EXALT Solo 110 Internal Components.................................................................................... 90

x
INDEX OF ILLUSTRATIONS AND TABLES
Fig. 39 - EXALT Solo 155 Internal Components .....................................................................................91
Fig. 40 - EXALT Combi 155 Internal Components ................................................................................ 92
Fig. 41 - EXALT Solo 199 Internal Components.................................................................................... 93
Fig. 42 - EXALT Combi 199 Internal Components ............................................................................... 94
Fig. 43 - EXALT Solo 110 Burner Components ................................................................................... 95
Fig. 44 - EXALT Solo/Combi 155 Burner Components...................................................................... 96
Fig. 45 - EXALT Combi 199 Burner Components..................................................................................97
Fig. 46 - EXALT Control & Display Enclosures...................................................................................... 98
Fig. 47 - EXALT Combi Hydro-block ..................................................................................................... 99
Fig. 48 - Front View EXALT Solo 110 ....................................................................................................102
Fig. 49 - Right Side View EXALT Solo 110 ............................................................................................103
Fig. 50 - Front View EXALT Solo 155....................................................................................................104
Fig. 51 - Right Side View EXALT Solo 155 ............................................................................................105
Fig. 52 - Front View EXALT Solo 199....................................................................................................106
Fig. 53 - Right Side View EXALT Solo 199 ...........................................................................................107
Fig. 54 - Front View EXALT Combi 155 ................................................................................................108
Fig. 55 - Right Side View EXALT Combi 155........................................................................................109
Fig. 56 - Front View EXALT Combi 199................................................................................................ 110
Fig. 57 - Right Side View EXALT Combi 199.........................................................................................111
Graph 1 - EXALT Solo - Pressure Loss Through Boiler ........................................................................ 112
Graph 2 - EXALT Combi - Pressure Loss Through Boiler.................................................................... 112
Table 1 - Natural Gas Venturis................................................................................................................. 40
Table 2 - Gas Piping Sizing - Natural Gas............................................................................................... 40
Table 3 - Propane Conversion Venturis................................................................................................... 41
Table 4 - Outdoor Reset Preset Selections.............................................................................................57
Table 5 - Throttle Screw Adjustment ......................................................................................................73
Table 6 - Acceptable Combustion Levels................................................................................................74

xi
SAFETY
PRODUCT AND SAFETY INFORMATION
This manual contains important information with respect to
the installation, starting up and maintenance of the appliance.
This manual must be provided to the Homeowner, who will
keep it in a safe place for future reference.
Ideal accepts no liability for any damage, injury, or loss
of life resulting from incorrect installation, alteration
of any factory supplied parts, or the use of parts or
ttings not specied by Ideal. If there is a conict or
doubt about the proper installation of the unit or any
factory supplied replacement parts please contact
Ideal Technical Support.
DEFINITIONS
The following terms are used throughout this manual
to bring attention to the presence of potential hazards
or to important information concerning the product.
Indicates the presence of a hazardous situation
which, if ignored, will result in substantial
property damage, serious injury, or death.
Indicates a potentially hazardous situation
which, if ignored, can result in substantial
property damage, serious injury, or death.
Indicates a potentially hazardous situation
which, if ignored, can result in minor property
damage, or injury.
Indicates special instructions on installation,
operationormaintenance,whichareimportant
to the equipment but not related to personal
injury hazards.
Indicates recommendations made by Ideal for
the installers, which will help to ensure optimum
operation and longevity of the equipment.
DANGER
WARNING
CAUTION
NOTICE
BEST PRACTICEBEST PRACTICE
• Do not use this appliance if any part has been
under water. Immediately call a qualified service
technician to inspect the appliance and to replace
any part of the control system which has been
under water.
• Avoid electrical shock when servicing the
appliance, by disconnecting the electrical supply
prior to performing maintenance.
• Failure to comply with these instructions will
result in substantial property damage, serious
injury, or death.
• What to do if you smell gas:
- Do not try to light any appliance
- Do not touch any electrical switch; do not use
any phone in your building.
- Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
- If you cannot reach your gas supplier, call the
fire department.
• Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
• Prior to installing this product, the qualified
installer must read all instructions included in
this manual and all accompanying manuals/
documents with this appliance.
• All installation steps required in these manuals
must be performed in the proper order given.
• This product must be maintained / serviced and
inspected annually by a qualified service technician.
• A byproduct of any gas fired appliance is carbon
monoxide. Ideal follows the recommended
advice of CPSC and requires the installation of a
minimum of two (2) carbon monoxide detectors
with an alarm and battery back-up if hard wired;
one in the mechanical room where the boiler
is located and another installed in the area
outside each sleeping area for all installations.
Consult the local authority having jurisdiction
for any additional carbon monoxide detector
requirements in your area. See Section 2.8 on
page 10 for additional carbon monoxide detector
requirements in Massachusetts.
• Failure to comply with these instructions can
result in substantial property damage, serious
injury, or death.
WARNING
IMPORTANT SAFETY INFORMATION FOR
THE HOMEOWNER AND THE INSTALLER DANGER

• It is prohibited to carry out any modifications to the appliance
without prior written consent from Ideal.
• Faulty parts must only be replaced by genuine Ideal factory
parts.
• Failure to comply with these instructions can result in minor
property damage, or injury.
The EXALT appliance is supplied with an acoustic
dampening foam rubber insert located in the appliance
air inlet. DO NOT remove this on installation.
• The homeowneris onlypermittedto carry outthebasic
set-up operations (EZ Setup) after he has received all
relevant instructions from the installer. Any other set-
up must be carried out by a qualified installer.
• In case of any anomaly, please call your qualified
service technician.
• Make sure to reference the unit’s model number and
serial number from the rating label when inquiring
about service or troubleshooting.
• Ideal reserves the right to change the technical
characteristics, components and features of its
products without prior notice. Check for an updated
version of this manual at www.idealusa.com.
CAUTION
NOTICE
• Should overheating occur or if the gas supply fails
to shut off, turn OFF the manual gas control valve
external to the appliance.
• Do not add cold make up water when the
appliance is hot. Thermal shock can potentially
cause cracks in the heat exchanger.
• Failure to comply with these instructions can
result in substantial property damage, serious
injury, or death.
Protection must be taken against excessive pressure!
TO PROTECT AGAINST EXCESSIVE PRESSURE:
• Verify that a field supplied 150 psi pressure relief
valve is installed in the recommended location
for Combi models using the domestic hot water
function (DHW Side).
• Verify the 30 psi relief valve supplied is installed
in the location provided (CH Side). In installations
where the CH pressure exceeds 30 psi, a 50 psi
relief valve (not included) can be installed in lieu of
the 30 psi relief valve.
• To avoid injury, install the relief valves in
compliance with local code requirements.
Failure to comply with these instructions can
result in substantial property damage, serious
injury, or death.
WARNING
WARNING
HOT WATER CAN SCALD!
Water temperature over 125ºF can cause severe
burns instantly or death from scalds.
• Children, disabled and elderly are at highest
risk of being scalded.
Ū Never leave them unattended in or near
shower, bathtub or sink.
Ū Never allow small children to use a hot wa-
ter faucet or draw their own bath.
• To avoid any potential scald hazard or if codes
require specific water temperatures at the hot
water faucet, the installer must:
Ū Install a thermostatic mixing valve at
this appliance and ensure it is working
property AND
Ū Set the domestic hot water temperature
to the lowest temperature which satisfies
your hot water needs.
Ū Feel and adjust water temperature before
bathing or showering.
Ū Water drained from the system drain
valves may be extremely hot.
TO AVOID INJURY:
• Make sure all connections are tight.
• Direct water flow away from any person.
• Failure to comply with these instructions will
result in substantial property damage, serious
injury, or death.
Bacteria can develop in the domestic water
system if certain minimum water temperatures
are not maintained. Failure to maintain at least
140°F [60°C] domestic hot water temperature
or use the Antilegionella function can result in
bacteria development, which can result in serious
injury, or death.
DANGER
WARNING
xii
SAFETY
PRODUCT AND SAFETY INFORMATION

1
CHAPTER 1
CHAPTER 1 - PRE-INSTALLATION REQUIREMENTS
1.1. EXALT Boilers - Code Compliance
The EXALT units must be installed by a qualied installer
in accordance with the following:
• All applicable local, state, national and provincial
codes, ordinances, regulations and laws.
• For installations in Massachusetts, code requires
the EXALT to be installed by a licensed plumber
or gas tter, and if antifreeze is utilized, the
installation of a reduced pressure back-ow
preventer device is required in the boiler’s cold
water ll or make up water supply line.
• For installation in Massachusetts, all direct vented
appliances must comply with the guidelines as
outlined in Section 2.8 on page 10.
• The National Fuel Gas Code (NFPA54/ ANSI Z 223.1).
• National Electric Code (ANSI/NFPA 70).
• For installations in Canada - Installation Code
for Gas Burning Equipment (CAN/CSA B149.1),
Canadian Electrical Code Part 1 (CSA C22.1).
• Standards for Controls and Safety Devices for
Automatically Fired Boilers (ANSI/ASME CSD-1),
when required.
The EXALT gas manifold and gas controls
meet the safe lighting and other performance
requirements as specified in ANSI Z21.13.
Where recommendations in this manual dier from
local or national codes, the local or national codes take
precedence.
1.1.1 Code Restrictions
The single wall heat exchanger in the EXALT Combi
water heater complies with National Standard Plumbing
Code, provided that:
• Boiler water (including additives) is practically non-
toxic, having toxicity rating or class of 1, as listed in
Clinical Toxicology of Commercial Products, and
• Boiler water pressure is limited to maximum 30
psig by approved relief valve.
Single wall heat exchangers are permitted under the
Uniform Plumbing Code - Paragraph L3.2. and L3.3 if
they satisfy all of the following requirements.
• The heat transfer medium is potable water or
contains only substances which are recognized
as safe by the U.S. Food and Drug Administration.
• The pressure of the heat transfer medium is
maintained less than the normal minimum
operating pressure of the potable water system.
NOTICE
• The equipment is permanently labeled to
indicate that only additives recognized as safe
by the FDA shall be used in the heat transfer
medium.
Other heat exchanger designs may be permitted where
approved by the Administrative Authority.
1.1.2 Operating Restrictions
• Maximum EXALT Combi DHW outlet
temperature is 149ºF, when mixing valve is
installed.
• Maximum boiler water temperature rating is 210ºF.
• Maximum DWH working pressure is 150 psig.
• Maximum boiler (CH) working pressure is
50 psig.
• Waterquality limitations (based on E.P.ANational
Secondary Drinking Water Regulations):
ŪChloride, less than 150 ppm or mg/l
ŪpH value min. 6, max. 8
ŪTotal hardness 3 - 7 grains/gallon or 50-120
ppm or mg/l.
ŪTotal Dissolved Solids (TDS), less than 120
ppm or mg/l.
ŪIron less than 0.3 ppm or mg/l.
ŪAluminum, less than 0.2 ppm or mg/l.
ŪCopper, less than 1 ppm or mg/l.
ŪManganese, less than 0.05 ppm or mg/l.
ŪZinc, less than 5 ppm or mg/l.
BEST PRACTICEBEST PRACTICE
In hard water areas (more than 7 grains of
hardness) soften the cold domestic supply
water to the appliance to prevent scaling.
• Any water conditioning system must be
installed and maintained in accordance
with manufacturer’s specifications.
• Do not install the EXALT Combi in any
application if the boiler piping contains
non-oxygen barrier tubing or if the boiler
piping is considered an “open system”.
Exposing the internal circulator to oxygen
contamination will lead to premature
failure and denial of the warranty.
NOTICE

2
CHAPTER 1
CHAPTER 1 - PRE-INSTALLATION REQUIREMENTS
1.2. Determining Product Location
The EXALT is certified for indoor,
conditioned space installations ONLY.
Before locating the EXALT check for convenient
locations to:
• Heating system piping
• Venting
• Gas supply piping
• Electrical service
Ensure the EXALT location allows the combustion air/
vent piping to be routed directly through the building
and terminate properly outside with a minimum amount
of length and bends.
Ensure the area chosen for the installation of the EXALT
is free of any combustible materials, gasoline, or other
ammable liquids.
Failure to remove or maintain the area free
of combustible materials, gasoline, or other
flammable liquids or vapors can result in
substantial property damage, serious injury,
or death.
Ensure the EXALT and its controls are protected from
dripping or spraying water during normal operation or
service.
The EXALT should be installed in a location so that any
water leaking from the boiler, piping connections, or
relief valve will not cause damage to the surrounding
area or any lower oors in the structure.
NOTICE
WARNING
1.3. Boiler Freeze Protection Feature
The CTRLMax boiler management system has a freeze
protection feature built in. This feature monitors the
boiler water temperature and responds as follows when
no call for heat is present:
• 46ºF [8ºC] Pump outputs congured to respond to
a CH1 Call are enabled.
• 42ºF [6ºC] Pump outputs congured to respond to
a CH1 or CH2 Call are enabled, Burner operates at
low re.
• 60ºF [15ºC] Freeze protection ends. Burner & all pumps
turn o after completing CH Post Pump Time.
• The boiler freeze protection feature is
disabled during a hard lockout. The burner
will not fire, but the circulators will operate.
• The boiler freeze protection feature is
designed to protect the boiler, not the
heating system. The boiler should be
installed in a primary/secondary piping
arrangement if it is installed in an unheated
space or exposed to water temperatures of
46ºF or less. Refer to Chapter 4 for primary/
secondary piping and Chapter 10 for
antifreeze guides.
• Failure to comply can result in minor
property damage, or injury.
1.4. Boiler Replacement
If the EXALT is replacing an existing boiler, the following
items should be checked and corrected prior to
installation:
• Boiler piping leaks and corrosion.
• Proper location and sizing of the expansion
tank on the boiler heating loop.
• The existing vent system is appropriate for the
EXALT and it is correctly installed. Refer to the
EXALT Vent Supplement for the vent system
requirements.
• Amount and quality of propylene glycol within
the system, if applicable.
CAUTION

3
CHAPTER 1
CHAPTER 1 - PRE-INSTALLATION REQUIREMENTS
1.5. Recommended Clearances
The EXALT is approved for zero clearance to combusti-
bles, excluding vent and boiler piping.
• Boiler piping must be a minimum 1/4 inch from
combustible materials.
• Reference the EXALT Vent Supplement for vent
pipe clearance requirements.
It is recommended that the following clearances
be maintained for serviceability:
• Top boiler jacket - 24 inches [610 mm].
• Front - 24 inches [610 mm].
• Bottom boiler piping - 24 inches [610 mm].
• Rear - 0 inches
• Sides - 6 inches [153 mm]
When maintaining less than recommended
service clearances, some product labeling,
including the rating label, may become hidden
and unreadable.
• If the recommended clearances listed above
cannot be maintained or the enclosure in
which the boiler is installed is less than 70
cubic feet, the space must be ventilated.
See Section 2.2 on page 6.
• When installing the EXALT in a confined space,
sufficient air must be provided to allow, under
normal operating conditions, proper air flow
around the product to maintain ambient
temperatures within safe limits to comply with
the National Fuel Gas Code (NFPA 54 / ANSI
Z223.1)
• Failure to comply with these instructions
can result in substantial property damage,
serious injury, or death.
BEST PRACTICEBEST PRACTICE
NOTICE
WARNING
1.6. Residential Garage Installations
When installing the EXALT in a residential garage, the
following special precautions per NFPA 54/ANSI Z223.1
must be taken:
• Mount the unit a minimum 18 inches [458 mm]
above the oor level of the garage. Ensure the
burner and ignition devices / controls are no less
than 18 inches [458 mm] above the oor level.
• Locate or protect the unit in a manner so it
cannot be damaged by a moving vehicle.

INTENTIONALLY LEFT BLANK

5
CHAPTER 2
CHAPTER 2 - COMBUSTION AIR & VENTING
2.1. Combustion Air Contamination
If the EXALT combustion air inlet is located in an
area likely to cause or contain contamination,
or if products which could contaminate the air
cannot be removed, the combustion air must
be repiped and terminated at another location.
Contaminated combustion air will damage the
unit and its burner system, and can result in
substantial property damage, serious injury, or
death.
• Do not operate the EXALT if the combustion
air inlet is located near a laundry room or
pool facility. These areas will always contain
hazardous contaminants.
• Pool, laundry, common household, and
hobby products often contain fluorine
or chlorine compounds. When these
chemicals pass through the burner and
vent system, they can form strong acids.
These acids will corrode the heat exchanger,
burner components, and vent system,
causing serious damage and possible
flue gas spillage or water leakage into the
surrounding area.
• Please read the information listed below.
If contaminating chemicals are located
near the area of the combustion air inlet,
the installer must pipe the combustion air
inlet to an area free of these chemicals, as
indicated in Chapter 6 on page 39.
• Failure to comply with these instructions
will result in substantial property damage,
serious injury, or death.
• The EXALT boiler is classified as a Category
IV appliance. This utilizes uncontaminated
indoor or outdoor air for applicance
combustion. A direct vent installation uses
the outdoor air. Air supply, combusiton
chamber, heat exchanger and evacuation
of POC (products of combustion) for this
type of appliance is sealed with respect to
the room in which the appliance is installed.
WARNING
DANGER
• Anin-directinstallationusesuncontaminated
indoor air for appliance combustion.
• When the air for combustion is taken from
the room air grilles must be installed by
the contractor. The air grilles should be
sized in accordance with ANSI Z223.1/
NFPA54 and/or Natural Gas and Propane
Installation Code CAN/CSA B149.1.
• The grille providing air when taking air
directly from the room should be clearly
labelled; "AIR SUPPLY, DO NOT COVER OR
RESTRICT. FAILURE TO PROVIDE ADEQUATE
AIR FOR COMBUSTION COULD RESULT IN
SERIOUS INJURY, OR DEATH."
Potential contaminating products
• Spray cans containing chloro/uorocarbons
• Permanent Wave Solutions
• Chlorinated wax
• Chlorine based swimming pool chemicals /
cleaners
• Calcium Chloride used for thawing ice
• Sodium Chloride used for water softening
• Refrigerant leaks
• Paint or varnish removers
• Hydrochloric acid / muriatic acid
• Cements and glues
• Antistatic fabric softeners used in clothes dryers
• Chlorine-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
• Adhesives used to fasten building products and
other similar products
Areas likely to contain these products
• Dry cleaning / laundry areas and establishments
• Beauty salons
• Metal fabrication shops
• Swimming pools and health spas
• Refrigeration Repair shops
• Photo processing plants
• Auto body shops
• Plastic manufacturing plants
• Furniture renishing areas and establishments
• New building construction
• Remodeling areas
• Garages with workshops

6
CHAPTER 2
CHAPTER 2 - COMBUSTION AIR & VENTING
2.2. Ventilation and Combustion Air
Requirements - Direct Vent
A Direct Vent appliance utilizes uncontaminated
outdoor air piped directly to the appliance for
combustion.
For Direct Vent installations involving only the EXALT, in
which the minimum service clearances are maintained
aslistedinSection 1.5onpage3,noventilationopenings
are required, but may be necessary to equalize the air
pressure with the outside.
For Direct Vent installations involving only the EXALT,
in which the minimum service clearances are not
maintained as listed in Section 1.5 on page 3, the space
/ enclosure must provide two openings for ventilation.
The openings must be sized to provide 1 square inch of
free area per 1,000 BTUH of boiler input. The openings
shall be placed 12 inches from the top of the space and
12 inches from the oor of the space.
For installations in which the EXALT shares the space
with air movers (exhaust fan, clothes dryers, replaces,
etc.) and other combustion equipment (gas or
oil) the space must be provided with adequate air
openings to provide ventilation and combustion air
to the equipment. To properly size the ventilation /
combustion air openings, the installer must comply
with the National Fuel Gas Code (NFPA 54 / ANSI
Z223.1) for installations in the U.S. or CAN/CSA B149.1
for installations in Canada.
The space must be provided with ventilation /
combustion air openings properly sized for all
make-up air requirements (exhaust fans, clothes
dryers, fireplaces, etc.) and the total input of
all appliances located in the same space as the
EXALT, excluding the input of a Direct Vent EXALT
which uses combustion air directly from the
outside, thus additional free area for the openings
is not required. Failure to provide or properly size
the openings can result in substantial property
damage, serious injury, or death.
WARNING
2.3. Ventilation and Combustion Air
Requirements - Category IV
A Category IV appliance utilizes uncontaminated
indoor or outdoor air surrounding the appliance for
combustion.
In order to reduce the potential risks associated
with indoor contaminates (see list in Section
2.1 on page 5), flammable vapors and tight
housing construction with little or no infiltration
air, it is recommended to pipe uncontaminated
combustion air directly from the outdoors to the
appliance. This practice also promotes higher
system efficiency by reducing heated indoor
air from being exhausted from the house and
replaced by cold infiltration air into the house.
For installations in which the EXALT sharesthespace with
air movers (exhaust fan, clothes dryers, replaces, etc.)
and other combustion equipment (gas or oil) the space
must be provided with adequate air openings to provide
ventilation and combustion air to the equipment. To
properly size the ventilation / combustion air openings,
the installer must comply with the National Fuel Gas
Code (NFPA 54 / ANSI Z223.1) for installations in the U.S.
or CAN/ CSA B149.1 for installations in Canada.
The space must be provided with ventilation /
combustion air openings properly sized for all
make-up air requirements (exhaust fans, clothes
dryers, fireplaces, etc.) and the total input of all
appliances, including the EXALT when located in
the same space. Failure to provide or properly size
the openings can result in substantial property
damage, serious injury, or death.
BEST PRACTICEBEST PRACTICE
WARNING

DHWDemand
DHW
186°F
156°F
Target=186°F
Gas Vent
Alternate
opening
location
Opening
Fig. 2 - All Combustion Air from Outdoors
Through One Permanent Air Opening
7
CHAPTER 2
CHAPTER 2 - COMBUSTION AIR & VENTING
2.4. Methods of Accessing Combustion Air
Into A Space - Category IV
2.4.1. Indoor Combustion Air
• The methods listed in this chapter for accessing
IndoorCombustionAirassumethattheinfiltration
rate is adequate and not less than .40 ACH.
• For infiltration rates less than .40 ACH,
reference the National Fuel Gas Code (NFPA
54 / ANSI Z223.1) for additional guidance.
• Indoor combustion air vent supply must be
installed with a minimum equivalent vent
length of 10 feet. Refer to Vent Supplement
for further guidance.
Opening Size and Location
Openings used to connect indoor spaces shall be sized and
located in accordance with the following, see Fig. 1 below :
• Combining spaces on the same story. Each opening
shall have a minimum free area of 1 sq. in./1000 Btu/hr
of the total input rating of all gas utilization equipment
in the space, but not less than 100 sq. inches. One
opening shall commence within 12 inches of the top,
and one opening shall commence within 12 inches
of the bottom of the enclosure. The minimum dimen-
sion of air openings shall be not less than 3 inches.
NOTICE
2.4.2. Outdoor Combustion Air
Isolating the combustion appliance room
from the rest of the building and bringing in
uncontaminated outside air for combustion
and ventilation is always preferred.
Opening Size and Location
The minimum dimension of air openings shall be not
less than 3 inches
Openings used to supply combustion and ventilation
air shall be sized and located in accordance with the
following:
• One Permanent Opening Method . One permanent
opening, commencing within 12 in. of the top of
the enclosure, shall be provided as shown in Fig.
2 below. The equipment shall have clearances of
at least 1 inch from the sides and 6 in. from the
front of the appliance. The opening shall directly
communicate with the outdoors or shall commu-
nicate through a vertical or horizontal duct to the
outdoors or spaces that freely communicate with
the outdoors and shall have a minimum free area
of the following:
• 1sq. in./3000 Btu/hr of the total input rating of
all equipment located in the enclosures, and
• Not less than the sum of the areas of all vent
connectors in the space.
BEST PRACTICEBEST PRACTICE
• Combining spaces in dierent stories. The volumes
of spaces in dierent stories shall be considered
as communicating spaces where such spaces are
connected by one or more openings in doors or oors
having a total minimum free area of 2 sq. in./1000 Btu/
hr of total input rating of all gas utilization equipment.
DHWDemand
DHW
186°F
156°F
Target=186°F
Openings
Fig. 1 - All Combustion Air from Adjacent Indoor
Spaces through Indoor Combustion Openings

DHWDemand
DHW
186°F
156°F
Target=186°F
Fig. 3 - All Combustion Air from Outdoors Through
Ventilated Attic
DHWDemand
DHW
186°F
156°F
Target=186°F
Fig. 4 - All Combustion Air from Outdoors Through
Horizontal Ducts
Gas Vent
Gas Vent
Outlet air
Inlet air duct
(ends 1ft (30 cm)
above oor)
Ventilation louvers
(each end of the attic)
Outlet air duct
Inlet air duct
8
CHAPTER 2
CHAPTER 2 - COMBUSTION AIR & VENTING
• Two Permanent Opening Method. Two permanent
openings, one commencing within 12 in. of the top
and one commencing within 12 in. of the bottom
of the enclosure, shall be provided. The openings
shall communicate directly, or by ducts, with the
outdoors or spaces that freely communicate with
the outdoors, as follows:
• Where directly communicating with the
outdoors or where communication to the
outdoors is through vertical ducts, each
opening shall have a minimum free area of 1
sq. in./4000 Btu/hr of total input rating of all
equipment in the enclosure. See Fig. 3 below.
• Where communicating with the outdoors is
through horizontal ducts, each opening shall have
a minimum free area of not less than 1 sq.in./2000
Btu/hr of total input rating of all equipment in the
enclosure. See Fig. 4 below.
2.4.3 Combination of Indoor and Outdoor
Combustion Air
Indoor Openings. Where used, openings connecting the
interior spaces shall comply with Section 2.4.1 on page 7.
Outdoor Opening(s) Location. Outdoor opening(s) shall
be located in accordance with Section 2.4.2 on page 7.
Outdoor Opening(s) Size. Outdoor opening(s) shall be
calculated in accordance with the following:
• The ratio of the interior spaces shall be the available
volume of all communicating spaces divided by
the required volume.
• The outdoor size reduction factor shall be 1 minus
the ratio of interior spaces.
• The minimum size of outdoor opening(s) calculated
in accordance with the above outdoor air chapter
multiplied by the reduction factor. The minimum
dimension of air openings shall not be less than 3
in.
2.5. Combustion Air and Vent Piping
The EXALT requires a Category IV venting system, which
is designed for pressurized venting and condensate.
The EXALT is certied as a Category IV or Direct
Vent (sealed combustion) appliance. A Category IV
appliance utilizes uncontaminated indoor or outdoor air
surrounding the appliance for combustion. A Direct Vent
appliance utilizes uncontaminated outdoor air piped
directly to the appliance for combustion.
Do not install the EXALT into a common vent with
any other gas or oil appliances. This will cause flue
gas spillage or appliance malfunction, which will
result in substantial property damage, serious
injury, or death.
It is essential that the supply of air for combustion
is not blocked or restricted - this could result in
serious injury, or death.
DANGER
DANGER