Patterson-Kelley SOLIS SL-1500 Operating instructions

&
P-K SOLIS
™
GAS FIRED BOILER
w/ NURO
®
CONTROL SYSTEM
Natural Gas
SL- 500/SL-2000/SL-2500/SL-3000
Part # 2701000090
C.S.A Design-Certified
Complies with ANSI Z21.13/CSA 4.9
Gas-Fired Low Pressure Steam and Hot Water Boilers
ASME Code, Section IV
C.S.A Design-Certified
Complies with ANSI Z21.13/CSA 4.9
Gas-Fired Low Pressure Steam and Hot Water Boilers
Model Number:
Serial Number:
Start-Up Date:
Patterson-Kelley
155 Burson Street
East Stroudsburg, PA 18301
Telephone: [phone]
Toll Free: 877.728.5351
Fax: 570.476.724 www.pattersonkelley.com
Released: March 15, 2021
INS T ALL A TION
& O W N E R ’ S
MAN U A L
INS T ALL A TION
& O W N E R ’ S
MAN U A L
INS T ALL A TION
& O W N E R ’ S
MAN U A L
INS T ALL A TION
& O W N E R ’ S
MAN U A L
INS T ALL A TION
& O W N E R ’ S
MAN U A L
INS T ALL A TION
& O W N E R ’ S
MAN U A L
INS T ALL A TION
& O W N E R ’ S
MAN U A L


 Patterson-Kelley 2021: All Rights Reserved.
The information in this manual is the property of Patterson-Kelley. The descriptions and specifications contained in this manual were in
effect at the time this manual was approved for publication. While Patterson-Kelley will continue to support earlier model boilers to
within a reasonable time limit, we reserve the right to discontinue models and replacement parts at any time or change specifications or
design without notice and without incurring any obligation.
- 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: If the information in these instructions is not followed
exactly, a fire or explosion may result causing property damage,
personal injury or death.

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Safety
General
P-K SOLIS
™
SL-1500, SL-2000, SL-2500 and SL-3000
All P-K SOLIS
™
SL-1500, SL-2000, SL-2500 and SL-3000
Gas-Fired Boilers must be:
•Installed, operated, and serviced in accordance with
instructions contained in this manual and other supplemental
manuals.
•Installed by qualified personnel in accordance with designs
prepared by qualified facility engineers including: structural,
mechanical, electrical, and other applicable disciplines.
•Operated and serviced in accordance with a comprehensive
safety program determined and established by the customer.
Do not attempt to operate or service until such a program
has been established.
•Operated and serviced by experienced, qualified, and
properly trained personnel in accordance with all applicable
codes, laws, and regulations.
Safety Precautions
Provide a suitable location for the boiler, away from normal
personnel traffic, with adequate working space, adequate
clearances, proper ventilation and lighting, with a structure
sufficiently strong and rigid to support the weight of the boiler, all
piping, and accessories.
N OTICE !
Each safety device must be
maintained and checked per the
recommended schedule. Refer to
Maintenance.
S AFETY F EATURES
It is the responsibility of the
customer to ensure external
safety provisions, such as but not
limited to: guards, safety labels,
safety controls, interlocks, lockout
devices are in place and operable.
S AFETY L ABELS
The following words are used in
this manual to denote the degree
of seriousness of the individual
hazards.
Indicates an imminently
hazardous situation which,
if not avoided, will result in
death or serious injury. This
signal word is to be limited
to the most extreme
situations.
Indicates a potentially
hazardous situation which, if
not avoided, could result in
death or serious injury.
Indicates a potentially
hazardous situation which, if
not avoided, may result in
minor or moderate injury. It
may also be used to alert
against unsafe practices.
N OTICE /N OTE - N OTICE
The preferred signal word to
address practices not related to
personal injury. The safety alert
symbol is not used with this signal
word.

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
N OTICE !
The safety labels shown below are
affixed to your boiler. Although the
labels are of high quality, they may
become dislodged or unreadable
over time. Contact Patterson-Kelley
at 570.476.7261 or toll-free at
877.728.5351 for replacements.
Gas may lose its odor. Proper gas
sensing equipment and procedures
should be used for leak checks.
Failure to detect gas leaks could
result in injury or death.
Training
Proper training is the best protection against accidents. It is
essential to read, understand, and follow the recommendations
of this manual before installing, operating, or servicing this
equipment. Failure to do so could result in fire or explosion and
serious injury, death, and/or property damage.
Operating and service personnel must be thoroughly familiar with
the basic construction of the P-K SOLIS 1500, 2000, 2500, &
3000 boilers, the use and locations of the controls, the operation
of the boilers, adjustment of their various mechanisms, and all
applicable safety precautions. If any of the provisions of this
manual are not fully and completely understood, contact
Patterson-Kelley Technical Service at 570.476.7261 or toll free at
877.728.5351.
Hazard Warnings
Electrical Hazards
Shock Hazard! Properly Lockout/Tagout the
electrical service and all other energy sources
before working on or near the boiler.
Shock Hazard! Do not spray water directly on
this boiler or any electrical components.
Electrical Hazard! Do not alter wiring
connections.
Crush Hazards
Lifting Hazards! Use properly rated lifting
equipment to lift and position the boiler. The
load is unbalanced. Test the balance before
lifting off the floor. Do not allow personnel
beneath the lifted load. Refer to the
approximate weights in the table below .
Boiler Model Weight in
Pounds
SL-1500 2,445 lbs.
SL-2000 2,445 lbs.
SL-2500 2,650 lbs.
SL-3000 2,650 lbs.
Bump Hazard from Overhead Ductwork and Piping
Injury Hazard! Install components with adequate vertical clearance.
Pressure Hazards
Pressure Hazard! Hot fluids. Install isolation valves on boiler water inlet and outlet.
Make sure isolation valves are closed before servicing boiler.
Pressure Hazard! Hot fluids. Annually test safety relief valve(s) for proper operation.
Do not operate boiler with faulty relief valve(s).

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Slip, Fall Hazards
Tripping Hazard! Do not install piping on floor surfaces. Maintain a clear path around
the boiler.
Slip and Fall Hazard! Use a drip pan to catch water while draining the boiler. Maintain
dry floor surfaces.
Slip and Fall Hazard! Do not locate intake or exhaust terminations above a walkway;
dripping of condensate can cause icing of the walking surface. Refer to 2.5.5 for more
information.
Fall Hazard! Do not stand on boiler.
Chemical Hazards
Chemical Hazards from Cleaning Products. Use
caution when cleaning the system. The use of
professional assistance is recommended. Use safe
procedures for the disposal of all cleaning solutions.
Combustion Condensate – An acidic pH of
approximately 3.0 to 5.0 can be expected. Use PVC,
CPVC, or other corrosion resistant piping for drainage. Collection and disposal must be in accordance
with all applicable regulations. A condensate neutralization kit is available. Please contact your local
Patterson-Kelley representative for more information.
Burn, Fire and Explosion Hazards
Burn, fire, and explosion hazards! Installation must be in strict conformance to all applicable codes
and standards including NFPA 54, ANSI Z223.1 and CAN/CSA B.149. Install all required
vent lines for gas devices. Refer to 3.4 and 3.5 for more information.
Hazard from Incorrect Fuels! Possible fire, explosion, overheating, and damage. Do not
use any fuels except the design fuels for the unit.
Overfire Hazards! High pressure in gas supply could result in overfiring of this or other
devices supplied from the same source.
Fire and Explosion Hazards! Close the main gas shutoff before servicing boiler.
Fire and Explosion Hazards! Do not store or use gasoline or other flammable vapors or
liquids in the vicinity of this or any other gas fired appliance.
Burn hazard! Possible hot surfaces. Do not touch gas vent during firing operation. Use
only factory recommended vent components.
Burn Hazard! Pipes, vents, and boiler components could be hot. Do not touch piping or stack surfaces
during operation or immediately after shutdown of the boiler.
Burn Hazard! Hot flue! Use caution when servicing or draining boiler.
Fire and Explosion Hazards! Use caution when servicing burner. Propane (LPG) is heavier than air
and may linger in the combustion chamber, vent lines, or elsewhere.
Gas Leak Hazard! Make sure the burner is installed correctly and blower/transition is securely fastened
following any maintenance performed on them. These connections may leak gas if assembled
incorrectly.
Gas Leak Hazard! All threaded gas connections must be made using a pipe compound that is resistant
to liquefied petroleum gas. Do not use Teflon™ tape on threaded gas piping.
Gas Leak Hazard! Check entire gas train for leaks after installation. If there is a smell of gas, shut down
the boiler and obtain immediate assistance from trained service personnel and/or your local fire
department.
Overfire Hazard! Possible fire and explosion from excess gas pressure. Make sure that gas inlet
pressure does not exceed 14 inches W.C.
Overfire Hazard! Possible fire and explosion. Possible malfunction of regulators and/or gas safety shut
off/control valves. Maintain all gas train components in good condition. Do not alter wiring connections.
Annual inspection by factory-trained personnel for proper set-up and operation is recommended.
Overfire and Underfire Hazards! Possible fire, explosion, overheating, and component failure. Do not
attempt to adjust firing rate of the boiler. The firing rate must be adjusted only by factory trained personnel.

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: March 15, 2021
Released: March 15, 2021

Patterson
-
Kelley 202
All Rights Reserved.
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Owners Manual (Rev A).docx
Page v
Table of Contents
1 INTRODUCTION ................................................................................................................................. IX
1.1 P URPOSE OF THIS D OCUMENT ......................................................................................................... 1
1.2 C OMMON A BBREVIATIONS ............................................................................................................... 1
2 SITE PREPARATION ........................................................................................................................... 2
2.1 I NITIAL I NSPECTION UPON R ECEIVING ............................................................................................... 2
2.2 S TORAGE P RIOR TO I NSTALLATION ................................................................................................... 2
2.3 C OMPLIANCE WITH C ODES ............................................................................................................... 3
2.4 L OCATION S ETUP ............................................................................................................................ 4
Foundation ................................................................................................................................ 4
Clearances ................................................................................................................................ 5
2.5 I NLET A IR AND E XHAUST V ENTING C ONSIDERATIONS ......................................................................... 6
Applicable Codes and Standards............................................................................................... 6
Combustion Air Inlet Planning (United States and Canada Considerations) .............................. 6
Category II/IV Flue Gas Exhaust Vent Planning ........................................................................ 7
Venting Materials for Flue/Exhaust Systems .............................................................................. 8
Required Clearances ................................................................................................................. 9
2.6 G AS P IPING C ONSIDERATIONS ....................................................................................................... 11
2.7 W ATER Q UALITY S TANDARD .......................................................................................................... 11
3 INSTALLATION.................................................................................................................................. 11
3.1 O VERVIEW .................................................................................................................................... 11
3.2 A PPLIANCE C ONNECTIONS ............................................................................................................. 11
Appliance Connections (SL-1500 & SL-2000).......................................................................... 12
Appliance Connections (SL-2500 & SL-3000).......................................................................... 13
3.3 E LECTRICAL C ONNECTIONS ........................................................................................................... 14
Power Requirements (SL-1500 & SL-2000)............................................................................. 14
Single Phase Power Supply Connection (SL-1500 & SL-2000) ............................................... 14
Power Requirements (SL-2500 & SL-3000)............................................................................. 15
Three Phase Power Supply Connection (SL-2500 & SL-3000) ................................................ 15
High Voltage (TB2) Terminal Block (SL1500 & SL2000) .......................................................... 17
High Voltage (TB2) Terminal Block (SL2500 & SL3000) .......................................................... 19
Low Voltage (TB1) Terminal Block ........................................................................................... 21
3.4 C OMBUSTION A IR .......................................................................................................................... 23
Air Inlet Requirements – United States .................................................................................... 23
Air Inlet Requirements - Canada.............................................................................................. 24
P-K SOLIS™ Combustion Air Requirements ........................................................................... 25
Direct Vent / Sealed Combustion Installations ......................................................................... 25
Motorized Combustion Air Dampers ........................................................................................ 26
3.5 F LUE G AS / E XHAUST V ENTING ...................................................................................................... 28
Category II or IV Venting Installation........................................................................................ 28
Vent Termination...................................................................................................................... 29
Venting for Multiple Boilers....................................................................................................... 30
Sealed Combustion/Direct Vent Systems................................................................................. 31
Inlet Duct Connection to Boiler................................................................................................. 35
Intake Duct Materials and Sizes .............................................................................................. 35
Category II Installations ........................................................................................................... 35
Category IV Installations.......................................................................................................... 36

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: March 15, 2021
Released: March 15, 2021
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Owners Manual (Rev A).docx
Page vi
Stainless Steel Venting............................................................................................................ 36
CPVC Vent System Installation............................................................................................ 36
CONDENSATE DRAIN, TRAP & DISPOSAL ...................................................................... 37
3.6 R EMOVING AN E XISTING B OILER .................................................................................................... 39
3.7 P IPING .......................................................................................................................................... 41
Gas Piping Overview ............................................................................................................... 41
Natural Gas Piping .................................................................................................................. 42
Pressure Testing the Gas Piping ............................................................................................. 42
Boiler Water Piping.................................................................................................................. 43
Boiler Inlet and Outlet Connections.......................................................................................... 44
Boiler Water Piping (for Installer) ............................................................................................. 44
3.8 W ATER Q UALITY ........................................................................................................................... 45
3.9 P RE -S TART C HECKLIST ................................................................................................................. 46
3.10 S AFETY C HECKS ........................................................................................................................... 46
Ignition Safety System Test ................................................................................................. 46
Low Water Cut-Out Test ...................................................................................................... 46
Manual Reset High Temperature Limit Test............................................................................ 47
Gas Pressure Switch Tests.................................................................................................. 47
3.11 F UEL /A IR A DJUSTMENTS ............................................................................................................... 48
Gas Pressure Adjustment.................................................................................................... 49
Manual Control Mode for High and Low Fire Adjustment ..................................................... 49
Adjusting High Fire .............................................................................................................. 50
Adjusting Low Fire ............................................................................................................... 50
Checking Flame Signal........................................................................................................ 50
3.12 I NITIAL NURO C ONTROL S ETUP AND A DJUSTMENT ......................................................................... 51
Startup................................................................................................................................. 51
Home Screen....................................................................................................................... 52
Information Screen .............................................................................................................. 52
Setup Wizard....................................................................................................................... 53
3.13 T
YPICAL B OILER O PERATING C ONDITIONS ...................................................................................... 53
4 OPERATIONS .................................................................................................................................... 54
4.1 NURO
®
C ONTROL P ANEL .............................................................................................................. 54
NURO Touch Screen Interface................................................................................................ 54
Factory Tests........................................................................................................................... 54
4.2 N ORMAL L IGHTING AND S HUT - DOWN P ROCEDURES ........................................................................ 55
Normal Lighting Procedures .................................................................................................... 55
Normal Shut Down Procedures................................................................................................ 55
4.3 E MERGENCY S HUT -O FF ................................................................................................................ 55
5 MAINTENANCE ................................................................................................................................. 56
5.1 P REVENTATIVE M AINTENANCE ....................................................................................................... 56
Daily Preventative Maintenance .............................................................................................. 56
Weekly Preventative Maintenance........................................................................................... 56
Monthly Preventative Maintenance.......................................................................................... 56
Semi-Annually ......................................................................................................................... 57
Annually .................................................................................................................................. 57
5.2 M AINTENANCE AND I NSPECTION S CHEDULE .................................................................................... 58
5.3 C LEANING THE B URNER & C OMBUSTION C HAMBER ......................................................................... 58
5.4 A FTER R EPAIRS OR M AINTENANCE ................................................................................................. 62
5.5 S EQUENCE OF O PERATIONS .......................................................................................................... 63

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: March 15, 2021
Released: March 15, 2021
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-
Kelley 202
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Page vii
5.6 T ROUBLESHOOTING ...................................................................................................................... 63
Loss of Power.......................................................................................................................... 64
Loss of Water Level................................................................................................................. 64
Low Gas Pressure ................................................................................................................... 64
High Gas Pressure .................................................................................................................. 64
High Water Temperature.......................................................................................................... 64
Low Air .................................................................................................................................... 64
Flame Failure .......................................................................................................................... 65
Flame Error ............................................................................................................................. 65
Flue Problem ........................................................................................................................... 65
6 PARTS/TECHNICAL SUPPORT ........................................................................................................ 66
6.1 T ERMINAL B LOCK A SSIGNMENTS .................................................................................................... 67
Terminal Block Assignments — Low Voltage (TB1) Terminal Block ......................................... 67
Terminal Block Assignments — High Voltage (TB2) Terminal Block......................................... 68
6.2 W IRING D IAGRAMS ........................................................................................................................ 69
SL-1500 & SL-2000 Natural Gas ............................................................................................. 69
SL-2500 & SL-3000 (208-240V) .............................................................................................. 71
SL-2500 & SL-3000 (480V) ..................................................................................................... 73
Wiring Diagram – Power Box 240V (SL-2500 & SL-3000 Only) ............................................... 75
Wiring Diagram – Power Box 480V (SL-2500 & SL-3000 Only) ............................................... 75
6.3 B OILER P ARTS I DENTIFICATION (SL-1500 & SL-2000) .................................................................... 76
Main Boiler Assembly (SL-1500 & SL-2000)............................................................................ 76
NURO Control Panel (SL-1500 & SL-2000)............................................................................. 77
Heat Exchanger Assembly (SL-1500 & SL-2000) .................................................................... 78
Natural Gas Train (SL-1500 & SL-2000).................................................................................. 79
Burner & Blower Assembly (SL-1500 & SL-2000).................................................................... 80
6.4 B OILER P ARTS I DENTIFICATION (SL-2500 & SL-3000) .................................................................... 81
Main Boiler Assembly (SL-2500 & SL-3000)............................................................................ 81
NURO Control Panel (SL-2500 & SL-3000)............................................................................. 82
Main Power Box (SL-2500 & SL-3000) .................................................................................... 83
Heat Exchanger Assembly (SL-2500 & SL-3000) .................................................................... 84
Natural Gas Train (SL-2500 & SL-3000).................................................................................. 85
Burner & Blower Assembly (SL-2500 & SL-3000).................................................................... 86
7 P-K SOLIS™ SPECIFIC LIMITED WARRANTY................................................................................. 87
8 BOILER FIRE-TEST REPORT ........................................................................................................... 89
APPENDIX A – MAINTENANCE LOG ....................................................................................................... 90
APPENDIX B – BOILER ALTITUDE DERATE SCHEDULE ...................................................................... 91
APPENDIX C – WATER QUALITY STANDARDS QUALITY STANDARDS FOR HYDRONIC BOILERS IN
MULTI-METAL SYSTEMS ......................................................................................................................... 92
APPENDIX D – BEST PRACTICES FOR NEW & RETROFIT SYSTEMS ................................................. 93
APPENDIX E – INSTALLATION AND QUICK REFERENCE .................................................................... 95
F UEL /G AS S UPPLY ................................................................................................................................... 95
E LECTRICAL /P OWER S UPPLY .................................................................................................................... 95
E XHAUST V ENTING ................................................................................................................................... 95
A PPLIANCE C ONNECTIONS (SL-1500 & SL-2000) ...................................................................................... 96
A PPLIANCE C ONNECTIONS (SL-2500 & SL-3000) ...................................................................................... 97

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: March 15, 2021
Released: March 15, 2021

Patterson
-
Kelley 202
All Rights Reserved.
2701000090 P-K SOLIS NURO Installation and
Owners Manual (Rev A).docx
Page viii
H YDRONICS /W ATER F LOW ........................................................................................................................ 98
P ROPYLENE G LYCOL F LOW ....................................................................................................................... 99

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: March 15, 2021
Released: March 15, 2021
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Patterson
-
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All Rights Reserved.
2701000090 P-K SOLIS NURO Installation and
Owners Manual (Rev A).docx
Page ix
1 Introduction
This manual describes the installation and operation of the
following P-K SOLIS™ boilers featuring NURO
®
controls.
SL-1500, SL-2000:
•Natural Gas, 208-240V (Single Phase)
SL-2500, & SL-3000:
•Natural Gas, 220-480V (Three Phase)
Individual differences between boiler models will be called out
and defined in separate sections and the titles of these
sections will include the boiler model number. If the boiler
model numbers are not listed in the section title, that section
is common to all boiler models.
If you have any questions on the information contained within,
or do not fully and completely understand the content, please
contact Patterson-Kelley Technical Service at 570.476.7261
or toll free at 877.728.5351.
The P-K SOLIS
™
gas-fired boiler is fully modulating using a
variable speed combustion blower, sophisticated
microprocessor controls, modulating gas safety shut off /
control valves and a unique stainless steel heat exchanger
capable of operating in a fully condensing mode to provide
maximum efficiency in a minimum amount of space. The
high-quality materials and design of the boiler should provide
years of trouble-free service if the instructions in this manual
are followed carefully.
The boiler is only a part of the complete heating system. This
boiler may be fully operational but because of poor
circulation, improper control, or other site related
characteristics, not deliver heat to the desired location.
Additional equipment such as temperature sensors, pumps,
flow switches, balancing valves, and check valves will be
required for satisfactory operation of any system. Patterson-
Kelley cannot be responsible for the design or operation of
such systems and a qualified engineer or contractor must be
consulted.
While details may differ slightly, basic operation is the same
for all models. Check the rating plate for correct fuel usage
and gas pressures.
If the information in this manual is not
followed, fire or explosion may result causing
property damage, personal injury, or loss of
life.
Do not store or use gasoline or other
flammable vapors or liquids in the vicinity of
this or any other appliance. Installation and
service must be performed by a qualified
installer, service agency, or the gas supplier.
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.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR
DE GAZ:
•Ne pas tenter d’allumer d’appareils.
•Ne touches à aucun interrupteur. Ne pas
vous server des téléphones dans le
bâtiment où vous vous trouvez.
•Appelez immédiatement votre
fournisseur de gaz depuis un voisin.
Suivez les instructions du fournisseur.
•Si vous ne pouvez rejoinder le
fournisseur de gaz, appelez le service
des incendies.
It is essential to read, understand, and follow
the recommendations of this manual before
installing, operating or servicing this
equipment. Failure to do so could result in
personal injury or death.
Installation and service must be performed
by a qualified and knowledgeable individual
who has been certified on the P-K STORM
™
boiler. The features which permit this boiler
to achieve high-efficiency performance can
be misused which could result in personal
injury or death.
NOTICE!
This manual covers single fuel P-K
SOLIS™ boilers.

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: March 15, 2021
Released: March 15, 2021
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2701000090 P-K SOLIS NURO Installation and
Owners Manual (Rev A).docx
Page x
PRECAUTIONS ASSOCIATED WITH HANDLING REFRACTORY LINING MATERIAL
• This Patterson-Kelley product contains a Combustion Area lined with REFRACTORY
CERAMIC FIBERS (RCFs) similar to many other devices produced in this industry.
• RCFs have been identified by the International Agency for Research on Cancer (IARC)
as possibly being carcinogenic to Humans.
• AVOID breathing particles or dust from RCFs and avoid contact with Skin or Eyes.
• The National Institute for Occupational Safety and Health (NIOSH) recommends the use
of a respirator meeting current standards, to avoid inhalation of dust. Also recommended is
loose fitting, long sleeved clothing, eye protection and gloves whenever handling RCFs.
Current NIOSH Recommendations are listed on their website at
http://www.cdc.gov/niosh/homepage.html, which should be viewed before the handling or
removal of Refractory Lining Materials on this or any similar device.
• Using a SPRAY BOTTLE, saturate with WATER; but not dripping, the combustion chamber
lining to prevent dust from becoming airborne.
• Place removed RCFs into a plastic bag for disposal with normal trash.
• Wash exposed clothing (if not disposable), TWICE and DRY separately from other laundry.

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: March 15, 2021
Released: March 15, 2021
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Patterson
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All Rights Reserved.
2701000090 P-K SOLIS NURO Installation and
Owners Manual (Rev A).docx
Page 1
1.1 Purpose of this Document
It is the purpose of this Installation and Owner’s Manual is to provide complete documentation support
for P-K SOLIS™ boilers featuring NURO controls. Patterson-Kelley is constantly seeking ways to
produce high quality HVAC products. Our operation is based on the premium quality control program
and insures that Patterson Kelley manufactures quality products.
The primary concern of all Patterson-Kelley equipment installation procedures is Safety. Safety
instructions and considerations are presented and repeated throughout the document as needed. If
you have any questions on the information contained within, or do not fully and completely understand
the content, please contact Patterson-Kelley Technical Service at 570.476.7261 or toll free at
877.728.5351.
1.2 Common Abbreviations
Abbreviation Description
AMP Ampere or Amperage
ANSI American National Standards Institute
ASME American Society of Mechanical Engineers
AWG American Wire Gauge
BTU British Thermal Unit
CH Comfort Heat
CO
2
Carbon Dioxide
CSA Canadian Standards Association
CSD-1 Controls and Safety Devices
CPVC Chlorinated Polyvinyl Chloride
DHW Domestic Hot Water
HWR Heating Water Return / Hot Water Return (From Building)
HWS Heating Water Supply / Hot Water Supply (To Building)
ID Inside Diameter
MBH Thousands of BTU / Hour
MODBUS A serial communication protocol (not an abbreviation)
NFPA National Fire and Protection Agency
NTC Negative Temperature Coefficient
O
2
Oxygen
OD Outside Diameter
OEM Original Equipment Manufacturer
SCFM Standard Cubic Feet per Minute
SMACNA Sheet Metal and Thermoplastic Duct Construction Manual Air Conditioning
Contractors National Association
TB<#> Terminal Block (1, 2, 3 etc.)
VAC Volts Alternating Current
VDC Volts Direct Current

P-K SOLIS™ Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: March 15, 2021
Released: March 15, 2021
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All Rights Reserved.
2701000090 P-K SOLIS NURO Installation and
Owners Manual (Rev A).docx
Page 2
2 Site Preparation
2.1 Initial Inspection upon Receiving
Upon receiving the boiler, inspect it for signs of shipping
damage. Some damage may be hidden. Unpack the boiler,
open the front and side doors and inspect the boiler. Verify
that the total number of pieces shown on the packing slip
agrees with those actually received.
2.2 Storage Prior to Installation
If the boiler is not installed immediately, it must be stored in a
location adequately protected from the weather, preferably
indoors. If this is not possible, then it should remain in the
shipping container and be covered by a tarpaulin or other
waterproof covering.
Installation and service must be
performed by a qualified installer,
service agency, or gas supplier.
Failure to install the equipment in
accordance with this manual
could result in an unsafe
operating condition.
L’installation et l’entretien doivent
être assures par un installateur ou
un service d’entretien qualifié ou
par le fournisseur de gaz.
N OTICE !
Controls and other equipment that
are damaged or fail due to weather
exposure are not covered by
warranty.
The boiler is heavy and requires
additional technicians to support
and move the unit(s) during
installation. Use extreme caution
to avoid dropping the boiler or
cause any bodily injury while
lifting or handling. When
positioning this boiler, maintain
positive control of it at all times.
Do not attempt to move the boiler
on surfaces that are not level.
Failure to heed this warning could
result in personal injury or death.
N OTICE !
The boiler may be installed on a
combustible floor; however, the
boiler must never be installed on
carpeting.
Bumping hazard from overhead
ducts! Install all components with
adequate vertical clearances.
Insufficient clearance can restrict
the service access, increasing the
possibility of injury.
NOTICE!
Note any damage, suspected potential damage,
or shortage of materials on the freight bill and immediately
notify the carrier. File all claims for shortage or damage
with the carrier. Claims for hidden damages must be filed
with your carrier within 7 days. The carton is equipped
with a “Tip (N) Tell”. If the “Tip (N) Tell” arrow point is
blue, that indicates the package has been on its side or
tipped over in transit.
NOTICE!
Controls and other equipment that are damaged
or fail due to weather exposure are not covered by warranty.
If the information in these instructions are not followed
exactly, a fire or explosion may result causing property
damage, personal injury, or death.
AVERTISSEMENT
Assurez-vous de bien suivre les instructions données
dans cette notice pour réduire au minimum le risqué
d’incendie ou d’explosion ou pour éviter tout dommage
materiel, toute blessure ou la mort.
Should overheating occur or the gas supply fail to shut
off, do not turn off or disconnect the electrical supply to
the pump. Instead, shut off the gas supply at a location
external to the appliance.
En cas de surchauffe ou si l’admission de gaz ne peut
être coupée, ne pas couper ni debrancher l’alimentation
électrique de la pompe. Fermer plutôt le robinet
d’admission de gaz à l’extérieur de l’appareil.

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2.3 Compliance with Codes
Each P-K SOLIS™ boiler with standard components complies with American National Standard/CSA
Standard ANSI Z21.13/CSA 4.9, latest edition for Gas-Fired Low Pressure Steam and Hot Water
Boilers.
The P-K SOLIS™ SL-1500, SL-2000, SL-2500, and SL-3000 heat exchangers are constructed and
stamped in accordance with ASME Boiler and Pressure Vessel Code, Section IV for 160 psig maximum
pressure and 210°F maximum temperature. Other codes or approvals which apply will be labeled on
the boiler.
SL-1500, SL-2000, SL-2500, & SL-3000
Code of Construction
(Boiler) ASME Section IV – “H” (Latest Edition)
Maximum Allowable Working
Pressure 160 PSIG
Maximum Allowable Design
Temperature 210°F
Hi-Limit Setpoint 200°F
Maximum Setpoint 185°F
Installation of the boiler must conform to all the requirements of all national, state and local codes
established by the authorities having jurisdiction or, in the absence of such requirements, to the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 latest edition in the U.S. In Canada, the equipment
shall be installed in accordance with the current Installation Code for Gas Burning Appliances and
Equipment, CAN/CSA-B.149, latest edition, and applicable Provincial Regulations for the class, which
should be carefully followed in all cases. Authorities having jurisdiction should be consulted before
making any installation.
Where required by local codes, the installation must conform to American Society of Mechanical
Engineers Safety Code for Controls and Safety Devices for Automatically Fired Boilers (ASME CSD-1).
In the Commonwealth of Massachusetts (a) this unit must be installed by a licensed pipe fitter/plumber,
(b) field installed gas cocks must be “T” handle type, (c) piping of condensate shall conform to the State
Plumbing Code, and (d) refer to the Massachusetts Supplement for further details.

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2.4 Location Setup
Foundation
Provide a firm, level foundation, preferably made of concrete. The P-K SOLIS™ boilers must be level
and upright to function properly. There are six leveling pads on the bottom of the boiler. Once the
boiler is installed on the foundation, use a bubble level and adjust the leveling pads until the appliance
is secure and level.
NOTICE! The appliance may be installed on a combustible floor; however, the appliance must
NEVER be installed on carpeting.
NOTICE! This appliance is certified for INDOOR use only!
QTY 6: Leveling
Pads (3 on Right
and 3 on Left)

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Clearances
If the boiler is to be installed near combustible surfaces, the minimum clearances are shown in the
illustration below. Failure to provide adequate service clearances, even with non-combustible surfaces,
may present problems during routine maintenance of the boiler. Maintain a clearance from the vent to
combustible surfaces of 24” or as specified in the vent manufacturer’s listed installation instructions.
The boiler must be installed in a space large in comparison to the boiler as described in the National
Fuel Gas Code, NFPA 54/ANSI Z223.1, Latest Edition.
Type of Surface Dimensions (inches)
A B C† D E
CSA Minimum Clearances to Combustibles 022* 000
Clearance to Non-Combustible Surfaces 0 0 0 0 0
Recommended Service Clearances 30 22* 24† 0** 12
* “B” Clearance depends upon exhaust vent configuration.
† “C” Space required for pipes, ducts, etc. in this area above the boiler.
** Do not put pipes, ducts, vents, etc. in this space. Electrical conduit must be installed vertically so that
the side doors can be opened.
N
ote:
Failure to provide recommended service clearances may make it difficult to perform service
on the boiler(s).

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2.5 Inlet Air and Exhaust Venting Considerations
Applicable Codes and Standards
United States Installation Codes:
Canada Installation Codes:
Flue Gas Exhaust Vent Standards:
These codes and standards contain information for the venting of
gas fired appliances, including, but not limited to vent sizing,
location, clearance to combustibles, and safe installation practices.
The installation must comply with both the above Federal Codes
and with state, provincial, and local codes.
Combustion Air Inlet Planning (United States and
Canada Considerations)
•Air inlet requirements for the U.S. are established by NFPA
54/ANSI Z223.1 & NFPA/ANSI 211.
•Air inlet requirements for Canada are established by
CAN/CSA B149.1.
Refer to see section 3.4, for more details on combustion air inlet
requirements in the United States and Canada.
Design and installation of
venting systems should be
done only by qualified and
knowledgeable venting systems
personnel and in accordance
with vent system
manufacturer’s installation
instructions. Installing a boiler
or vent system using improper
installation methods or
materials can result in serious
injury or death due to fire or
asphyxiation.
Before connecting a boiler to a
venting system, it must be
determined whether the boiler
is to be installed in a
conventional or direct vent
configuration. In the US,
provisions for combustion air
must be in accordance with
NFPA 54/ANSI Z223.1, National
Fuel Gas Code, latest edition, or
applicable provisions of local
building codes. In Canada,
combustion and ventilation air
openings shall comply with
CAN/CSA B-149.1 Natural Gas
and Propane Installation Code.
For correct installation of a vent
system, read all of these
instructions and refer to the
vent manufacturer’s
instructions.
Failure to use a proper vent
system (types and materials), as
described in this manual will
void the boiler warranty and
may result in rapid deterioration
of the venting system, creating
a health or life safety hazard.
Faulty vent installation can
allow toxic fumes to be released
into living areas. This may
cause property damage, injury,
or death.
NBIC – Part I National Board Inspection Code -
Installation
NFPA 54/ANSI Z223.1 National Fuel Gas Code
NFPA/ANSI 211
Chimneys, Fireplaces, Vents and Solid
Fuel Burning Appliances
CAN/CSA B149.1 Installation Codes for Gas Burning
Equipment
UL 441 / ULC S605 Standard for Gas Vents
UL 1738 Venting Systems for Gas-Burning
Appliances, Categories II, III and IV
ULC S636-95
Standard for Type BH Venting System
Sheet Metal and Thermoplastic Duct
Construction Manual Air Conditioning
Contractors National Association
(SMACNA)

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Category II/IV Flue Gas Exhaust Vent Planning
Several codes and standards have categorized appliances in accordance with the flue gas temperature
and pressure produced by the appliance. The applicable categories are defined as follows:
•Category II: An appliance that operates with a non-positive vent static pressure and with a vent
temperature that may cause excessive condensate production in the vent.
•Category IV: An appliance that operates with a positive vent static pressure and with a vent
temperature that may cause excessive condensate production in the vent.
•Direct Vent: An appliance that is constructed and installed so that all air for combustion is
derived directly from outdoors and all flue gases are discharged to the outdoors.
All P-K SOLIS™ boilers are dual-certified as Category II or IV appliances, as defined in ANSI
Z21.13/CSA 4.9, latest edition. The P-K SOLIS™ series boilers are capable of operating with slightly
negative to slightly positive exhaust pressure. It is critical to ensure the flue vent material is certified for
Category II or IV operation.
N OTE : For Category II installations, ensure the flue venting system is designed to maintain a
slightly negative exhaust pressure between -0.01” W.C. and -0.05” W.C.
N OTE : For Category IV installations, ensure the flue venting system is designed to maintain a
slightly positive exhaust pressure which MUST BE in the following ranges:
•+0.01” W.C. and +0.22” W.C. (Direct Vent / Sealed Combustion)
•+0.01” W.C. and +0.4” W.C. (Exhaust Only)
The vent material to be used for US and Canada is listed in the Table of Acceptable Materials for
Venting Systems located in 2.5.4.
Vent installations shall be in accordance with NFPA 54/ANSI Z223.1, the National Fuel Gas Code, or
CAN/CSA-B149.1, the Natural Gas and Propane Installation Code, or applicable provisions of the local
building codes.
Vent Sizing for Category II / IV Operation
The vent must be sized in accordance with the ASHRAE Systems and Equipment handbook (Chapter
30) or according to the vent manufacturer’s recommendations. When using manufactured venting
systems, consult your vent supplier for correct sizing and structural support requirements.
P-K SOLIS™ Boiler Model Draft Stack Temperature CO
2
Natural Gas
SL-1500, SL-
2000,
SL-2500, SL-3000
Category II
-0.01” to -0.05” W.C. 220 °F (gross) 9.3%
SL-1500, SL-
2000,
SL-2500, SL-3000
Category IV
(Sealed Combustion)
+0.01” to +0.22” W.C.
220 °F (gross) 9.3%
SL-1500, SL-
2000,
SL-2500, SL-3000
Category IV
(Exhaust Only)
+0.01” to +0.4” W.C.
220 °F (gross) 9.3%

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Venting Materials for Flue/Exhaust Systems
The P-K SOLIS™ boilers are dual certified as a Category II and
Category IV appliances, which vents with a temperature that is likely to
cause condensation in the vent. Therefore, any venting system used
with the P-K SOLIS™ boiler must comply with the requirements for
either Category II or Category IV venting systems as specified in the
latest edition of NFPA 54/ANSI Z223.1 in the US or the latest edition of
CAN/CSA B-149.1 in Canada.
CPVC Venting
US: CPVC pipe conforming to ASTM F441. Sch. 80 fittings
conforming to ASTM F439. Joints are to be sealed with
solvent conforming ASTM 493.
Canada: CPVC Pipe, Fitting and Sealant listed and
labeled to ULC S-636 Standard for Type BH Venting
Systems.
Polypropylene Venting
US and Canada: Polypropylene such as InnoFlue
®
from
Centrotherm or PolyPro
®
from DuraVent or Z-DENS from Z-
Flex
®
or other listed manufacturers. When used, the same
manufacturer's material must be used throughout the
system. It is not permissible to use material from different
manufacturers within the same system.
As per ANSI Z21.13b-2012 * CSA 4.9b-2012:
•The use of cellular core PVC, CPVC, and Radel
®
as venting materials is prohibited.
•The use of external insulation on plastic vent pipe is prohibited.
Acceptable Venting Materials
Model Country AL29-4C 316L SS PVC CPVC POLYPROPYLENE
SL-1500 US Yes Yes No Yes Note 2
SL-2000 US Yes Yes No Yes Note 2
SL-2500 US Yes Yes No Yes Note 2
SL-3000 US Yes Yes No Yes Note 2
SL-1500 Canada Yes Yes No Note 1 Note 1
SL-2000 Canada Yes Yes No Note 1 Note 1
SL-2500 Canada Yes Yes No Note 1 Note 1
SL-3000 Canada Yes Yes No Note 1 Note 1
NOTE 1: When this material is used for venting, it must be listed to ULC-S636.
NOTE 2: When this material is used for venting, it must be listed to either UL-
1738 or ULC-S636 (depending on the local requirements). Consult the local
boiler codes for more information.
The venting materials listed are
intended for the venting of gas
burning appliances only. Do
not use these venting materials
for venting liquid or solid fuel
(such as oil, kerosene, wood,
or coal) appliances.
Maintain clearances to
combustibles as listed in the
vent manufacturer’s
installation instructions or as
set forth in the codes and
standards listed in this section.
Do not use these vent pipes for
incinerators of any sort!
This boiler is not certified for
use with PVC venting. Use of
PVC venting may result in vent
failure and possible serious
injury or death.

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Required Clearances
Conventional Vent Systems Clearances
The following termination clearance requirements are for conventional non direct vent installations:
•The vent system shall terminate at least 3 ft. above a forced air inlet located within 10 ft.
horizontally.
•The vent system shall terminate at least 4 ft. below, 4 ft. horizontally from, or 1 ft. above any
door, operable window or gravity inlet into any building. The bottom of the vent terminal shall be
at least 12 in. above grade or highest expected snow line (if applicable).
•Through the wall terminations shall not terminate over public walkways or over an area where
condensate or vapor could create a nuisance or hazard or could be detrimental to the operation
of regulators, relief valves, or other equipment.
Direct Vent (Sealed Combustion) Systems Clearances
•The vent terminal shall be located at least 12 in. from any air opening into a building. The
bottom of the vent terminal shall be at least 12 in. above grade. Both the vent and air intake
terminals must be at least 12 in. above the highest expected snow line.
•Through the wall terminations shall not terminate over public walkways or over an area where
condensate or vapor could create a nuisance or hazard or could be detrimental to the operation
of regulators, relief valves, or other equipment.
•When multiple direct vent appliances are adjacent, the exhaust must terminate at least 10 ft.
horizontally or 3 ft. vertically from the air intake of another appliance.
The boiler vent should not be
connected into any portion of
another mechanical draft system
without consulting the vent
manufacturer. The boiler shall
not be connected to any part of
a vent system serving a
Category I appliance, nor shall a
Category I appliance be
connected to any part of the
vent system serving this
appliance. For Category II
common venting, refer to local
venting codes. Improper
interconnection of venting
systems may result in leakage of
flue gases into occupied spaces.

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Mark Description US Installations Canadian Installations
A Clearance to each side of center line
extended above meter/regulator 3 ft. (91 cm) within a height of 15 ft. (4.6 m) above the meter/regulator assembly
B Clearance to service regulator vent outlet 3 ft. (91 cm)
C Clearance above grade, porch, deck,
veranda, or balcony 12 in
D Clearance to window or door that may be
opened
4 ft. (1.2 m) below or to side
of opening
1 ft. (300 mm) above
opening
6 in (15 cm) for appliances ≤10,000
Btuh (3 kW)
12 in (30 cm) for appliances > 10,000
Btuh (3 kW) and ≤100,000 Btuh (30
kW)
36 in (91 cm) for appliances > 100,000
Btuh (30 kW)
E
Clearance to non-mechanical air supply inlet
to building or the combustion air inlet to any
other appliance
4 ft. (1.2 m) below or to side
of opening
1 ft. (300 mm) above
opening
6 in (15 cm) for appliances ≤10,000
Btuh (3 kW)
12 in (30 cm) for appliances > 10,000
Btuh (3 kW) and ≤100,000 Btuh (30
kW)
36 in (91 cm) for appliances > 100,000
Btuh (30 kW)
F Clearance to a mechanical air supply inlet 3 ft. (91 cm) above if within
10 ft. (3 m) horizontally 6 feet (1.83 m)
For clearances not specified maintain clearance in accordance with local installation codes and the requirements of the gas supplier
Interior Component Clearances
All vent system components shall be installed so as to maintain the following minimum clearances:
Material
Combustible Non-Combustibles
Unlisted single wall metal pipe Do NOT Use Do NOT Use
Single wall PVC pipe Do NOT Use Do NOT Use
UL 1738 listed Category IV vent Per manufacturer’s listing Per manufacturer’s listing
Flue Connection
The connection from the appliance to the vent should be as direct as possible and the upward slope of
any horizontal breaching for Category I and IV boilers should be at least 1/4 inch per linear foot (21
mm/m). Examples of the complete exhaust system with drain is in 3.5. The appliance connector
should incorporate provisions to drain condensate formed in the vent system. The connector should
include an appropriate drain section (not provided).
Les instructions d'installation du système d'évacuation doivent préciser que les sections horizontales
doivent être supportées pour prévenir le fléchissement. Les méthodes et les intervalles de support
doivent être spécifiés. Les instructions doivent aussi indiquer les renseignements suivants: les
chaudières de catégories I et IV doivent présenter des tronçons horizontaux dont la pente montante est
d'au moins ¼ po par pied (21 mm/m) entre la chaudière et l'évent; les chaudières de catégories II et IV
doivent être installées de façon à empêcher l'accumulation de condensat; et si nécessaire, les
chaudières de catégories II et IV doivent être pourvues de dispositifs d'évacuation du condensate.