AERCO INN600, INN800, INN1060 User Manual
GF-128
OMM-0079_0B
INNOVATION Series
Gas-Fired Water Heaters
Installation, Operation, and Maintenance
Natural Gas Modulating,
Condensing Water Heater
Models:
• INN600
• INN800
• INN1060
Applicable to Serial Numbers
G-10-1350 to G-11-0563
Other documents for this product
include:
• GF-5030 INN Gas Supply Guide
• GF-5050 INN Venting Guide
• GF-5060 INN Elect. Power Guide
• GF-5080 INN Sizing Guide
Copies of these documents are
included in Appendices J thru M
of this Manual
Released: 07/21/2011
USER MANUAL
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
GF-128 Innovation Series Water He aters
Technical Support:
OMM-0079_0B USER MANUAL
(Mon–Fri, 8am-5pm EST)
1-800-526-0288
www.aerco.com
The information containe d in this manual is subject to c hange without notice from AERCO Inter national,
Inc. AERCO makes no warranty of any kind with respect to this material, including but not limited to
implied warranties of merchantability and fitness f or a particular application. AE RCO International is not
liable for errors appearing in this manual. Nor for incidental or consequential damages occurring in
connection with the furnishing, performance, or use of this material.
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Disclaimer
Innovation Series Water Heaters GF-128
Table of Contents USER MANUAL OMM-0079_0B
TABLE OF CONTENTS
FOREWORD ................................................................................................................... 7
CHAPTER 1. SAFETY PRECAUTIONS .................................................................. 9
1.1 WARNINGS & CAUTIONS ................................................................................................. 9
1.2 EMERGENCY SHUTDOWN ............................................................................................. 10
1.3 PROLONGED SHUTDOWN ............................................................................................. 10
CHAPTER 2. INSTALLATION ............................................................................... 13
2.1 INTRODUCTION ............................................................................................................... 13
2.2 RECEIVING THE UNIT ..................................................................................................... 13
2.3 UNPACKING .................................................................................................................... 13
2.4 SITE PREPARATION ....................................................................................................... 13
2.4.1 Installation Clearances ..............................................................................................14
2.4.2 Setting the Unit ..........................................................................................................15
2.5 WATER INLET AND OUTLET PIPING ............................................................................. 15
2.6 TEST HOSE BIB CONNECTION ...................................................................................... 16
2.7 PRESSURE & TEMPERATURE RELIEF VALVE INSTALLATION .................................. 17
2.8 SYSTEM RECIRCULATION LOOP .................................................................................. 17
2.9 CONDENSATE DRAIN & PIPING .................................................................................... 17
2.10 GAS SUPPLY PIPING .................................................................................................... 19
2.10.1 Gas Supply Specifications. ........................................................................................20
2.10.2 Manual Gas Shutoff Valve .........................................................................................20
2.10.3 External Gas Supply Regulator ..................................................................................20
2.11 AC ELECTRICAL POWER WIRING ............................................................................... 21
2.11.1 Electrical Power Requirements ..................................................................................21
2.12 FIELD CONTROL WIRING ............................................................................................. 22
2.12.1 Outdoor Air Sensor ....................................................................................................23
2.12.2 AUX SENSOR IN ......................................................................................................23
2.12.3 ANALOG IN ...............................................................................................................23
2.12.4 B.M.S. (PWM) IN .......................................................................................................24
2.12.5 SHIELD .....................................................................................................................24
2.12.6 mA OUT ....................................................................................................................24
2.12.7 EXHAUST SENSOR IN .............................................................................................24
2.12.8 INTERLOCKS............................................................................................................24
2.12.9 FAULT RELAY ..........................................................................................................25
2.12.10 AUXILIARY RELAY CONTACTS.............................................................................25
2.13 FLUE GAS VENT INSTALLATION ................................................................................. 25
2.14 COMBUSTION AIR ......................................................................................................... 25
2.14.1 Combustion From Outside the Building .....................................................................26
2.14.2 Combustion Air from Inside the Building ....................................................................26
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GF-128 Innovation Series Water He aters
OMM-0079_0B USER MANUAL Table of Contents
2.15 SEALED COMBUSTION ................................................................................................. 26
CHAPTER 3. OPERATION .................................................................................... 27
3.1 INTRODUCTION ............................................................................................................... 27
3.2 CONTROL PANEL DESCRIPTION .................................................................................. 27
3.3 CONTROL PANEL MENUS .............................................................................................. 31
3.3.1 Menu Processing Procedure ......................................................................................31
3.4 OPERATING MENU ......................................................................................................... 32
3.5 SETUP MENU ................................................................................................................... 33
3.6 CONFIGURATION MENU ................................................................................................. 34
3.7 TUNING MENU ................................................................................................................. 35
3.8 START SEQUENCE ......................................................................................................... 36
3.9 START/STOP LEVELS ..................................................................................................... 38
CHAPTER 4. INITIAL START-UP ......................................................................... 41
4.1 INITIAL STAR T-UP REQUIREM ENTS ............................................................................. 41
4.2 TOOLS AND INSTRUMENTATION FOR COMBUSTION CALIBRATION ....................... 41
4.2.1 Required Tools & Instrumentation..............................................................................41
4.2.2 Installing Gas Supply Manometer ..............................................................................42
4.2.3 Accessing the Analyzer Probe Port ............................................................................42
4.3 NATURAL GAS COMBUST ION CALIBRATION .............................................................. 43
4.4 REASSEMBLY ................................................................................................................. 45
4.5 TEMPERATURE CONTROL CALIBRATION ................................................................... 45
4.5.1 Setting the Outlet Water Temperature Setpoint .........................................................45
4.5.2 Minimum Load Adjustment ........................................................................................46
4.5.3 Maximum Load Adjustment .......................................................................................46
4.6 OVER-TEMPERATURE LIMIT SWITCHES ...................................................................... 47
CHAPTER 5. SAFETY DEVICE TESTING ............................................................ 49
5.1 TESTING OF SAFETY DEVICES ..................................................................................... 49
5.2 LOW GAS PRESSURE FAULT TEST .............................................................................. 49
5.3 HIGH GAS PRESSURE TEST .......................................................................................... 50
5.4 LOW WATER LEVEL FAULT TEST ................................................................................. 50
5.5 WATER TEMPERATURE FAULT TEST .......................................................................... 51
5.6 INTERLOCK TESTS ......................................................................................................... 52
5.6.1 Remote Interlock .......................................................................................................52
5.6.2 Delayed Interlock .......................................................................................................53
5.7 FLAME FAULT TESTS ..................................................................................................... 53
5.8 AIR FLO W FAULT TESTS ............................................................................................... 54
Page 4 of 200 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph.: 800-526-0288 07/21/11
Innovation Series Water Heaters GF-128
Table of Contents USER MANUAL OMM-0079_0B
5.9 SSOV PROOF OF CLOSURE SWITCH ........................................................................... 56
5.10 PURGE SWITCH OPEN DURING PURGE ..................................................................... 56
5.11 IGNITION SWITCH OPEN DURING IGNITION ............................................................... 57
5.12 SAFETY PRESSURE RELIEF VALVE TEST .................................................................. 58
CHAPTER 6. MAINTENANCE .............................................................................. 59
6.1 MAINTENANCE SCHEDULE ........................................................................................... 59
6.2 IGNITER-INJECTOR ........................................................................................................ 60
6.3 FLAME DETECTOR ......................................................................................................... 61
6.4 COMBUSTION CALIBRATION ........................................................................................ 62
6.5 SAFETY DEVICE TESTING ............................................................................................. 62
6.6 FIRESIDE INSPECTION ................................................................................................... 62
6.7 WATERSIDE INSPECTION .............................................................................................. 65
6.8 HEAT EXCHANGER CLEANING ..................................................................................... 67
6.8.1 Pumping System Set-Up Instructions ........................................................................67
6.8.2 Cleaning Procedure ...................................................................................................68
6.8.3 Testing HydroSkrub Effectiveness .............................................................................69
6.9 CONDENSATE DRAIN TRAP .......................................................................................... 69
6.10 AIR FILTER REPLACEMENT .......................................................................................... 70
6.11 SHUTTING THE WATER HEATER DOW N FO R AN EXTENDED PERI OD OF TIME ...... 71
6.12 PLACING THE HEATER BACK IN SERVICE AFTER A PROLONGED SHUTDOWN .... 71
CHAPTER 7. TROUBLESHOOTING GUIDE ........................................................ 73
7.1 INTRODUCTION ............................................................................................................... 73
7.2 ADDITIONAL FAULTS WITHOUT SPECIF IC FAULT MESSAGES ................................. 84
CHAPTER 8. RS232 COMMUNIC ATION .............................................................. 87
8.1 INTRODUCTION ............................................................................................................... 87
8.2 RS232 COMMUNICATION SETUP .................................................................................. 87
8.3 MENU PROCESSING UTILIZING RS232 COMMUNI CATION ......................................... 87
8.4 DATA LOGGING .............................................................................................................. 88
8.4.1 Fault Log ...................................................................................................................88
8.4.2 Operation Time Log ...................................................................................................89
8.4.3 Sensor Log ................................................................................................................89
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GF-128 Innovation Series Water He aters
OMM-0079_0B USER MANUAL Table of Contents
APPENDIX A: WATER HEATER MENU ITEM DESCRIPTIONS ............................... 91
APPENDIX B: STARTUP, STATUS AND FAULT MESSAGES ................................. 95
APPENDIX C 99TEMPERATURE SENSOR RESISTANCE/VOLTAGE CHART ........ 99
APPENDIX D: WATER HEATER DEFAULT SETTINGS .......................................... 101
APPENDIX E: PARTS LIST DRAWINGS .................................................................. 103
APPENDIX F: PIPING DRAWINGS ........................................................................... 113
APPENDIX G: C-MORE CONTROL PANEL VIEWS ................................................ 127
APPENDIX H: C-MORE WIRING DIAGRAMS .......................................................... 129
APPENDIX I: RECOMMENDED SPARES ................................................................ 137
APPENDIX J: GF-5030: GAS COMPONENTS & SUPPLY DESIGN GUIDE .......... 139
APPENDIX K: GF-5050: VENTING & COMBUSTION AIR GUIDE ......................... 151
APPENDIX L: GF-5060: ELECTRICAL POWER GUIDE ......................................... 175
APPENDIX M: GF-5080: COMMERCIAL LAUNDRY SIZING GUIDE ..................... 183
APPENDIX N: LIMITED WARRANTY ....................................................................... 195
Page 6 of 200 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph.: 800-526-0288 07/21/11
Innovation Series Water Heaters GF-128
Foreword USER MANUAL OMM-0079_0B
FOREWORD
The AERCO Innovation Series Water Heaters are modulating units which represent a true
industry advance that meets the needs of today's energy efficiency and environmental
concerns. Designed for use in any domestic water heating system, each Innovation model
provides precisely-controlled potable water within ±2°F of setpoint, regardless of flow rate.
Innovation’s compact size and varied venting capabilities allow maximum installation flexibility.
The Innovation Series Heaters, with their load tracking controls modulate over a 20:1 turn down
ratio to match the system demand and yield high thermal efficiencies.
When installed and operated on natural gas in accordance with this Instruction Manual, the
Innovation Series Models covered herein comply with the NOx emission standards outlined in:
• South Coast Air Quality Management District (SCAQMD), Rule 1146.2
• Texas Commission on Environmental Quality (TCEQ), Title 30, Chapter 117,
Rule 117.465
Whether used in singular or modular arrangements, the Innovation Heaters offer the maximum
flexibility in venting with minimum installation space requirements. Innovation’s advanced
electronic controls offer simplified integration with today’s Energy Management Systems.
For service or parts, contact your local sales representative or AERCO INTERNATIONAL.
NAME:
ORGANIZATION:
ADDRESS:
TELEPHONE:
INST ALLATION DATE: ___________________________________________________
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GF-128 Innovation Series Water He aters
OMM-0079_0B USER MANUAL Foreword
This P age Is Intentionally Blank
Page 8 of 200 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph.: 800-526-0288 07/21/11
Chapter 1 Innovation Series Water He ate rs GF-128
Safety Precautions USER MANUAL OMM-0079_0B
CHAPTER 1. SAFETY PRECAUTIONS
1.1 WARNINGS & CAUTIONS
Installers and operating personnel MUST, at all times, observe all safety regulations. The following
warnings and cautions are gener al and m ust be given the same attention as spec ific precautio ns included
in these instructions. In addition to all the requirements inc luded in this AERCO Instruction Manu al, the
installation of units MUST conform with local building codes, or, in the absence of local codes, ANSI
Z223.1 (National Fuel G as C ode Pub lica tio n No. NFPA-54) for gas-fired heaters and ANSI/ NFP AS B f or LP
gas-fired heaters. Where applicable, the equipment shall be installed in accordance with the current
Installation Code for Gas Burning Appliances and Equipment, CSA B149.1, and applicable Provincial
regulations for the class; which should be carefully followed in all cases. Authorities having jurisdiction
should be consulted before installations are made.
See pages 11 and 1 2 for important inf ormation re garding installation of units wit hin the Com monwealth of
Massachusetts.
IMPORTANT
This Instruction Manual is an integral part of the product and must be maintained
in legible condition. It must be given to the user by the installer and kept in a safe
place for future reference.
IMPORTANT
Read the following restrictions prior to installing the water heater:
1. The water heater can only be used for applications where the chlorine
concentrations Do Not Exceed 4 mg/L which is the Environmental Protection
Agency limit for chlorine concentrations in drinking water.
2. Do Not use this heater for a pool heating application.
WARNING
DO NOT USE MATCHES, CANDLES, FLAMES, OR OTHER SOURCES OF
IGNITION TO CHECK FOR GAS LEAKS.
WARNING
FLUIDS UNDER PRESSURE MAY CAUSE INJURY TO PERSONNEL OR
DAMAGE TO EQUIPMENT WHEN RELEASED. BE SURE TO SHUT OFF ALL
INCOMING AND OUTGOING WATER SHUTOFF VALVES. CAREFULLY
DECREASE ALL TRAPPED PRESSURES TO ZERO BEFORE PERFORMING
MAINTENANCE.
WARNING
ELECTRICAL VOLTAGES UP TO 120 VAC MAY BE USED IN THIS
EQUIPMENT. THEREFORE THE COVER ON THE UNIT’S POWER BOX
(LOCATED BEHIND THE FRONT PANEL DOOR) MUST BE INST ALL ED AT ALL
TIMES, EXCEPT DURING MAINT E NANCE AND SE RVICING.
WARNING
A DOUBLE-POLE SWITCH MUST BE INSTALLED ON THE ELECTRICAL
SUPPLY LINE OF THE UNIT. THE SWITCH MUST BE INSTALLED IN AN
EASILY ACCESSIBLE POSITION TO QUICKLY AND SAFELY DISCONNECT
ELECTRICAL SERVICE. DO NOT AFFIX SWITCH TO UNIT SHEET METAL
ENCLOSURES.
07/21/11 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 Page 9 of 200
GF-128 Innovation Series Water He aters Chapter 1
MANUAL GAS SHUTOFF VALVE
VALVE OPEN
VALVE CLOSED
OMM-0079_0B USER MANUAL Safety Precautions
CAUTIONS
Must be observed to prevent equipment damage or loss of operating
effectiveness.
CAUTION
Many soaps used for gas pipe leak testing are corrosive to metals. The piping
must
completed.
DO NOT use this heater if any part has been under water. Call a qualified service
technician to inspect and replace any part that has been under water.
1.2 EM ERGENCY SHUTDOWN
If overheati ng occurs or the gas suppl y fails to shut of f, close the manual gas shutof f valve (Figure 1-1)
located external to the unit.
The Installer mus t identify and indicate the locat ion of the emergency shutdo wn manual
gas valve to operating personnel.
be rinsed thoroughly with clean water after leak checks have been
CAUTION
IMPORTANT
1.3 PRO L ONGED SHUTDOWN
After prolonged shutdown, it is recommended that the startup procedures in Chapter 4 and the safety
device test procedures in Chapter 6 of this manual be performed, to verify all system-operating
parameters. If ther e is an em ergency, turn of f the ele ctrical power suppl y to the AERC O heater and close
the manual gas valve located upstream the unit. The installer must identify the emergency shut-off device.
Page 10 of 200 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph.: 800-526-0288 07/21/11
Figure 1-1. Manual Gas Shutoff Valve
Chapter 1 Innovation Series Water He ate rs GF-128
Safety Precautions USER MANUAL OMM-0079_0B
IMPORTANT – FOR MASSACHUSETTS I NSTALLATIONS
Water heater Installations within the Commonwealth of Massachusetts must
conform to the following requirements:
• Heater must be installed by a plumber or a gas fitter who is licensed within the
Commonwealth of Massachusetts.
• Prior to unit operation, the complete gas train and all connections must be leak
tested using a non-corrosive soap.
• The vent termination must be located a minimum of 4 feet above grade level.
If side-wall venting is used, the installation must conform to the following
requirements extracted from 248 CMR 5.08 (2):
(a) For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or
structure used in whole or in part for residential purposes, including those owned or operated by the
Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished
grade in the are a of the ventin g, inclu ding b ut not l im ited to deck s and porches , the f ollo wing requir em ents
shall be satisfied:
1. INSTALLAT ION OF CARBON MONOXID E DETECTORS
horizontal vented gas f ueled equipment, the installing plum ber or gasfitter sha ll observe that a har d wired
carbon monoxide detector with an alarm and battery back-up is installe d on the floor level where the gas
equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery
operated or hard wired car bon monox ide detec tor w ith an alar m is ins talled on each ad ditiona l level of the
dwelling, building or s tructure served by the sid e wall horizontal vented g as fueled equipment. It s hall be
the responsibility of the pr operty owner to secure the services of qual ified licensed professionals for the
installation of hard wired carbon monoxide detectors.
a. In the event that the side wall horizontally vented gas f ueled equipment is installed in a crawl
space or an attic, the har d wired carbon monoxide d etector with alarm and batter y back-up may be
installed on the next adjacent floor level.
b. In the event that the re quirements of this subdivision can not b e met at the tim e of completion of
installation, the owner shall have a period of thirt y (30) da ys to compl y with the abov e requirem ents;
provided, however, that during said thirty (30) day period, a battery operated carbon monoxide
detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS.
accordance with the a bove provisions sha ll comply with NFPA 72 0 and be ANSI/UL 2034 listed and IAS
certified.
3. SIGNAGE
building at a minim um height of eight (8) f eet abo ve grade d irectl y in line with the exhaus t vent t erm inal for
the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less
than one-half (1/2) inch in size, "GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL
OBSTRUCTIONS".
. A metal or plastic identif ication plate shall be permanently mount ed to the exterior of the
. At the time of installation of the side wall
Each carbon monoxide detector as required in
4. INSPECTION
equipment shall not approve the installation unless, upon inspection, the inspector observes carbon
monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5.08(2)(a)1
through 4.
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. The state or local gas inspector of the side wall horizontally vented gas fueled
GF-128 Innovation Series Water He aters Chapter 1
OMM-0079_0B USER MANUAL Safety Precautions
(b) EXEMPTIONS
1. The equipment listed in Chapter 10 ent itled "Equipm ent Not Required To Be Vented" in the m ost
current edition of NFPA 54 as adopted by the Board; and
2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or
structure separate from the dwelling, building or structure used in whole or in part for residential
purposes.
(c) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VEN TING SYSTE M PROVIDED.
manufacturer of Produc t Approved side wall horizonta lly vented gas eq uipment provi des a venting system
design or venting s ystem components with the equipm ent, the instructions provided b y the manufacturer
for installation of the equipment and the venting system shall include:
1. Detailed instructions for the installation of the venting system design or the venting system
components; and
2. A complete parts list for the venting system design or venting system.
(d) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED.
When the manufact urer of a Product Approved si de wall horizontally vented ga s fueled equipment does
not provide the parts for venting the flue gases, but identifies "special venting systems", the following
requirements shall be satisfied by the manufacturer:
1. The referenced "special venting system" instructions shall be included with the appliance or
equipment installation instructions; and
: The following equipment is exempt from 248 CMR 5.08(2)(a)1 through 4:
When the
2. The "special vent in g s ys tems" shall be Product Ap p roved by the Board, and the ins truc t ions f or th at
system shall include a parts list and detailed installation instructions.
(e) A copy of all ins tallation instr uctions for all Pr oduct Approved s ide wall horiz ontally vented g as fueled
equipment, all venting instructions, all parts lists for venting instructions, and/or all venting design
instructions shall remain with the appliance or equipment at the completion of the installation.
______________________________________
[End of Extracted Information From 248 CMR 5.08 (2)]
Page 12 of 200 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph.: 800-526-0288 07/21/11
Chapter 2 Innovation Series Water Heater s GF-128
Installation USER MANUAL OMM-0079_0B
CHAPTER 2. INSTALLATION
2.1 INTRODUCTION
This Chapter provides the descriptions and proc edures necess ary to unpack, inspec t and install AERCO
Innovation Water Heater Models INN 600, INN 800 and INN 1060.
2.2 RECEIVING THE UNIT
Each Innovation Water Heating System is shipped as a single crated unit. The shipping weight is
approximately 1200 pounds. The unit m ust be moved with the proper rigg ing equipment f or safety and to
avoid equipment dam age. T he unit should b e com pletely inspected f or evidenc e of s hipping dam age and
shipment completeness at the time of receipt from the carrier and before
NOTE
AERCO is not responsible for lost or damaged freight. Each unit has a Tip-N-Tell
indicator on the outside of the crate. This indicates if the unit has been turned on
its side during shipment. If the Tip-N-Tell indicator is tripped, do not sign for the
shipment. Note the information on the carrier’s paperwork and request a freight
claim and inspection by a claims adjuster before proceeding. Any other visual
damage to the packaging mater ials should also be made clear to the delivering
carrier.
the bill of lading is signed.
2.3 UNPACKING
Carefully unpack the unit taking care not to damage the unit enclosure when cutting away packaging
materials
After unpacking, a close inspection of the unit sh ould be made to ensure that there is no evidence of
damage not indicated b y the Tip-N-T ell indicator. The f reight carrier shou ld be notified imm ediately if an y
damage is detected.
The following access ories come standard with each un it and ar e e ith er packed separately within the unit’s
shipping container or are factory installed on the unit:
• Pressure/Temperature Gauge
• Spare Spark Igniter-Injector
• Spare Flame Detector
• ASME Pressure Relief Valve
• Condensate Drain Trap
• 1-1/2” Gas Supply Shutoff Valve
When optional access ories are order ed, they may be pack ed within the unit ’s shipping container , factory
installed on the unit, or pac ked and shipped in a separate c onta in er . Any standard or optional acces s ories
shipped loose should be identified and stored in a safe place until ready for installation or use.
2.4 SITE PREPARATION
Ensure that the site selected for installation of the Innovation Water Heater includes:
• Access to AC Input Power at 120 VAC, Single-Phase, 60 Hz @ 20 Amps.
• Access to Natural Gas line at a minimum pressure of 4 inches W.C.
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GF-128 Innovation Series Water He aters Chapter 2
OMM-0079_0B USER MANUAL Installation
2.4.1 Installation Clearances
Innovation Models 790 and 1060 are packaged in enclosur es having identical exterior dim ensions. The
unit must be installed with the prescribed clearances for service as shown in Figure 2-1. The minimum
clearance dimens ions, required by AERCO, are liste d below. However, if Local Building Codes require
additional clearances, these codes shall supersede AERCO’s requirements. Minimum acceptable
clearances required are as follows:
• Sides: 24 inches
• Front : 24 inches
• Rear: 30 inches
• Top: 18 inches
All gas piping, water pi ping and electric al conduit or c able must be ar ranged so that th ey do not interf ere
with the removal of any panels, or inhibit service or maintenance of the unit.
Figure 2-1 Innovation Water Heater Clearances
WARNING
KEEP THE UNIT AREA CLEAR AND FREE FROM ALL COMBUSTIBLE
MATERIALS AND FLAMMABLE VAPORS OR LIQUIDS
.
CAUTION
While packaged in the shipping container, the unit must be moved by pallet jack
or forklift from the FRONT ONLY.
FOR MASSACHUSSETTS ONLY:
For Massachusetts installations, the unit must be installed by a plumber or gasfitter who is licensed within the Commonwealth of Massachusetts. In addition, the
installation must comply with all requirements specified in Chapter 1 (Safety
Precautions), pages 11 and 12.
Page 14 of 200 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph.: 800-526-0288 07/21/11
Chapter 2 Innovation Series Water Heater s GF-128
Installation USER MANUAL OMM-0079_0B
2.4.2 Setting the Unit
The unit must be instal le d on a 4 inch to 6 inch h ous e k eeping p ad t o ensure proper condensate drainage.
If anchoring the unit, r ef er to the dimensional drawings in Appendix F f or anc hor l ocatio ns. Two lifting lugs
are provided at the top of the heat exchan ger as sho wn in Figure 2-2. USE THESE TWO LUGS T O LIFT
AND MOVE THE UNIT. Rem ove the top pane l from the unit to provide acc ess to the lif ting lugs. Rem ove
the four (4) lag screws s ecuring the unit to the s h ipp ing s kid. Lift the unit off the s hip ping s kid and position
it on the 4 inch to 6 inch housekeeping concrete pad (required) in the desired location.
Figure 2-2
Partial Top View Showing Lifting Tab Location
In multiple unit installations , it is im por tant to plan the position of each unit in advance. Sufficient space for
piping connections and fut ure service/maintenance requirem ents must also be taken into consideration.
All piping must include ample provisions for expansion.
2.5 WATER INLET AND OUTLET PIPING
The locations of the 2" NPT cold water inlet and hot water outlet p iping connections ar e shown in Figure
2-3. Flow rates through the unit are limited to 30 gpm continuous and 40 gpm intermittent.
Shut-off valves and union connections must be installed in the inlet and outlet lines for
maintenance. The use of dielectric unions is recommended.
NOTE:
All piping must be arranged so that it does not interfere with removal of any covers, inhibit
service or maintenance, or prevent access between the unit and walls, or another unit.
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GF-128 Innovation Series Water He aters Chapter 2
OMM-0079_0B USER MANUAL Installation
Figure 2-3. Water Inlet & Outlet Locations
2.6 TEST HOS E BIB CONNECTION
A Test Hose Bib connecti on, upstream of the s hut off valve on the hot water out let, is requir ed for star tup
and testing (Figure 2-4) . The pipe d iameter should be a m inimum of 3/4". The Test Hose Bib cannot be
omitted.
Figure 2-4. Test Hose Bib Location
Page 16 of 200 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph.: 800-526-0288 07/21/11
Chapter 2 Innovation Series Water Heater s GF-128
Installation USER MANUAL OMM-0079_0B
NOTE:
The maximum working pre ssure f or installations within t he Province of Alberta is 87 psig.
Therefore, a pressure & temperature relief valve with a setting of 75 psig/210°F is
supplied with Alberta shipments. See Drawing AP-A-863 in Appendix E.
2.7 PRESSURE & TEMPERATURE RELIEF VALVE INSTALLATION
An ASME rated Pressure & Temperature (P&T) Relief Valve is supplied with each Innovation Water
Heater. With the exc eption of Alberta insta llations (see above Note) , the v alve s etpoi nt is 150 psi g/210°F.
The P&T Relief V al ve is installed at the to p of th e R ec i r culati on Loo p As sembly as shown in F i gure 2-5. A
suitable pipe joint com pound should be used on the threaded c onnections. Any excess should be wiped
off to avoid getting an y into the valve body. The reli ef valve should be piped to within 12 inches of the
floor to prevent injury in the event of a discharge. The relief piping must be full size, 1-1/2”, without
reduction. No valves , restrictions, or other blockages are allowed in the discharge line. In m ultiple unit
installations the discharge lines must not
suitable discharge location.
be manifolded together. Each must be individually run to a
Figure 2-5. P&T Relief Valve Location
2.8 SYSTEM RECIRCULATION LOOP
The System Recirculati on Loop Assembly is located at the rear of the unit as shown in Fi gure 2-5. This
assembly contains a rec irculator pum p which c on nec t s bet ween the upper hot wat er o utl et and l o wer c o ld
water inlet of the unit’s heat exchanger. The purpose of this loop is to provide feed-forward (FFWD)
temperature control by mixing a portion of the hot water outlet with the cold water inlet of the unit.
Temperature sensors located in the hot water outlet and c old water inlet provide temperatur e data to t he
C-More Control System . The Control System utilizes this data to m odulate the fire rate (Air/Fuel Valve
position) to precisely maintain the hot water outlet temperature at the selected setpoint temperature.
2.9 CONDENSATE DRAIN & PIPING
The Innovation Water Heater is des igned t o condens e wat er vapor f rom the flue produc ts. T heref ore, the
installation must have provisions for suitable condensate drainage or collection.
The condensate drai n port, is located on the exhaust manifold at the rear of the unit (Figure 2-6). This
drain port must be connected t o the C ondensate T rap (part n o. 240 60) which is pack ed separate ly with in
the unit’s shipping conta iner. The Condensat e Trap inlet and o utlet connectio ns contain tappe d 3/4” NPT
ports.
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Figure 2-6. Condensate Drain Connection Location
A sample Condensate T rap inst allation is shown in Figure 2-7. However, the actual insta llation details f or
the trap will var y depend ing on the avai lable c learanc es , housek eepin g pad heig ht/ dim ens ions and other
prevailing conditions at the site. the following general guidelines must be observed to ensure proper
condensate drainage:
• The condensate trap inl et (Figure 2-6) must be level with, or lower than the exhaust m anifold drain
port.
• The base of the condensate trap must be supported to ensure that it is level (horizontal).
• The trap must be rem ovable for routine maintenance. AERCO rec ommends that a union be utilized
between the exhaust manifold condensate drain port and the trap inlet port.
While observing the above guidelines, install the condensate trap as follows,
1. Connect the condensate trap inlet to the exhaust manifold drain connection using the appropriate
piping components (nipples, reducers, elbows, etc.) for the heater installation site.
2. At the condensate trap outlet, install a 3/4” NPT nipple.
3. Connect a length of 1” I.D polypropylene hose to the trap outlet and secure with a hose clamp.
4. Route the hose on the trap outlet to a nearby floor drain.
If a floor drain is not a vailable, a condens ate pum p can be used to rem ove the c ondensate to drain . The
maximum condensate flow rate is 20 G PH. The condensate drain trap, associat ed fittings and dra in line
must be removable for routine maintenance.
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Installation USER MANUAL OMM-0079_0B
Figure 2-7. Sample Condensate Trap Installation
2.10 GAS SUPPLY PIPING
The AERCO Innovat ion Gas Com ponents and S upply Design Gu ide, GF-5030 (see Append ix J) must be
consulted prior to designing or installing any gas supply piping.
WARNING
NEVER USE MATCHES, CANDLES, FLAMES OR OTHER SOURCES OF
IGNITION TO CHECK FOR GAS LEAKS
.
CAUTION
Many soaps used for gas pipe leak testing are corrosive to metals. Therefore,
piping must be rinsed thoroughly with clean water after leak checks have been
completed.
All gas piping must be arranged so that it does not interfere with removal of any
covers, inhibit service/maintenance, or restrict access between the unit and
walls, or another unit.
Innovation units contain a 1 inch NPT gas inlet connection on the rear of the unit as shown in Figure 2-3.
NOTE
Prior to installation, all pip es should be d e-bur red an d inter nall y clear ed of an y scale, m etal ch ips or ot her
foreign particles. Do Not install any flexible connectors or unapproved gas fittings. Piping must be
supported from the floor, ceiling or walls only and must not be supported by the unit.
A suitable piping com pound, approved for use with natural gas, should be used. Any excess must be
wiped off to prevent clogging of components.
To avoid unit damage when pres s ure t esti ng gas p ip in g, isol ate t he u nit f r om the gas supply piping. A t no
time should the gas press u re applied to the unit exceed 14” W.C.. Leak tes t all e xter nal p ip ing thor o ugh ly
using a soap and water s olution or suitable equivalent. The gas piping used must meet all appl icable
codes.
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2.10.1 Gas Supply Specifications.
The gas supply input specifications to the unit for Natural Gas are as follows:
The maximum static pressure to the unit mus t not exceed 14” W .C. The gas supply pressur e to the unit
must be of suff icient capaci ty to pro vide 1060 cfh while m aintain ing the gas pressur e at 7 inches W .C. f or
FM gas trains.
2.10.2 Manual Gas Shutoff Valve
A manual shut-off valve must be installed in the gas supply line upstream of the Heater as shown in
Figure 2-8. Maximum allowable gas pressure to the Heater is 14” W.C.
NOTE
Paragraph 2.10.3 appl ies only to water heater install ations within the Commonweal th of
Massachusetts.
2.10.3 External Gas Supply Regulator
For Massachusetts ins tallations, a m andator y externa l gas supp ly regulator m ust be pos itioned as shown
in Figure 2-6. The gas suppl y re gulator must be pr operly vented to outdoor s. Consult the loca l gas utility
for detailed requirements concerning venting of the the supply gas regulator.
NOTE
The external regulator must be capable of regulating 40,000 – 1,060,000 BTU/HR of
natural gas while maintaining a gas pressure of 7.0” W.C. to the unit.
CAUTION
A lock-up style regulator MUST be used when gas supply pressure will exceed
14” W.C.
Figure 2-8. Manual Gas Shut-Off Valve Location
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2.11 AC ELECTRICAL POWER WIRING
The AERCO Innovation Electrical Power Wiring Guide, GF-5060 (see Appen dix L), must be consulted
prior to connecting an y AC po wer wiri ng to t he un it. E xternal AC po wer c onnec tions ar e m ade to t he un it
inside the Power Box on t he front panel of the un it. Remove the front do or of the unit to ac ces s the Po wer
Box mounted directly abov e the Contr ol Box. Loos en the f our Power Box cover screws and r em ove cover
to access the AC terminal connections inside the Power Box (Figure 2-9).
Figure 2-9. Power Box With Cover Removed
NOTE
All electrical condu it and hard ware must be ins talled so that it does not i nterfere with th e
removal of any unit covers , inhibit service/maintenance, or prev ent access between the
unit and walls or another unit.
2.11.1 Electrical Power Requirements
The AERCO Innovation He ater acc epts 120 V AC, s in g le-ph as e, 60 H z @ 20 A. The Power Box contains a
terminal block as shown in Figure 2-8. In addition, a wiring diagram showing the required AC power
connections is provided on the front cover of the Power Box.
Each unit must be connected t o a dedicated electrical circuit. NO OTHER DE VICES SHOULD BE ON
THE SAME ELECTRICAL CIRCUIT AS THE HEATER.
A double-pole switch must be installed on the electrical supply line in an easily accessible location to
quickly and safely discon nect electrical servic e. DO NOT attach the switch t o sheet metal enclosures of
the unit.
After placing the unit in s ervice, the ignit ion safety shutof f device must be tested. If an external elec trical
power source is used, the insta lled boiler must be electrically bonded to gro und in accordance with the
requirements of the authority having jurisdiction. In the absence of such requirements, the installation
shall conform to National Electrical Code (NEC), ANSI/NFPA 70 and/or the Canadian Electrical Code
(CEC) Part I, CSA C22.1 Electrical Code.
For electrical power wiring diagrams, see the AERCO Innovation Electrical Power Wiring Guide, (GF-
5060).
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2.12 FIELD CONTROL WIRING
Each unit is fully wired f rom the f actor y with an i ntern al operat ing co ntrol s ystem . No f ield contr ol wiri ng is
required for normal operation. Howe ver, th e C -More control s ystem us ed with all Innovation H eater s does
allow for some c ontrol and monitoring features. Wir ing connections f or these features are made in the
Input/Output (I/O) Box. T he I/O Box is located on the upper -left portion of the unit f ront panel (Figure 2-
11) behind the rem ovable front panel door. To acces s the I/O Box terminal strips shown in Figure 2-11,
loosen the four cover screws and rem ove the cover. All field wiring is ins talled from the rear of the panel
by routing the wires through one of the four bushings provided.
Figure 2-10. AC Terminal Block Configurations
Refer to the wiring diagra m provided on the cover of the I/O Box (F igure 2-12) when making all wiring
connections.
Figure 2-11. Input/Output (I/O) Box Location
Since identical I/O Boxes are used with both AERCO gas-fired boilers and water heater s, some of the
input and output connectio ns apply only to boilers while oth ers are common to both boilers and heaters.
These I/O Box connections are noted in the following paragraphs.
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CAUTION
DO NOT make any connections to the I/O Box terminals labeled “NOT USED”.
Attempting to do so may cause equipment damage.
Figure 2-12. I/O Box Terminal Strips
2.12.1 Outdoor Air Sensor
Not Applicable to Water Heaters.
2.12.2 AUX SENSOR IN
The AUX SENSOR IN terminals can be used to add an additional temperature sensor for monitoring
purposes. This input is always enabled and is a view onl y input that can be seen in the o perating menu.
The sensor must be wired to the AUX SENSOR IN and SENSOR COMMON and must be similar to
AERCO BALCO wire sensor P/N 12449. A resistance chart for this sensor is located in APPENDIX C.
2.12.3 ANALOG IN
The ANALOG IN + and – terminals are used when an external signal is used to change the setpoint
(Remote Setpoint Mode) of the heater.
Either a 4 to 20 mA /1 to 5 VDC or a 0 to 20 m A/ 0 to 5 VDC signal ma y be used to vary the setpoint or
air/fuel valve posi tion. The factory default setting is for 4 to 20 mA / 1 to 5 VD C, however this may be
changed to 0 to 20 mA / 0 to 5 VDC using the Configuration Menu described in Chapter 3.
If voltage rather than current is selected as the drive signal, a DIP s witch must be set on the PMC Board
located inside the Control Box. Contact the AERCO factory for information on setting DIP switches.
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All supplied signals must be floating (unground-ed) signals. Connections between the source and the
Heater’s I/O Box mus t be made using tw isted shielded pa ir of 18–2 2 AW G wire such as Belde n 9841(see
Figure 2-12). Polarit y must be maintai ned and the shield m ust be connecte d only at the source end and
must be left floating (not connected) at the Heater’s I/O Box.
Whether using voltage or current f or the drive si gnal, the y are linearl y mapped to a 40°F to 240°F setpoint
or a 0% to 100% air/fuel valve position. No scaling for these signals is provided
2.12.4 B.M.S. (PWM) IN
Not Applicable to Water Heaters
2.12.5 SHIELD
The SHIELD terminals are used to terminate any shields used on sensor wires connected to the unit.
Shields must only be connected to these terminals.
2.12.6 mA OUT
These terminals prov ide a 4 to 20 m A output that c an be used to m onitor setpoi nt ( 40°F to 24 0°F), outlet
temperature (30°F to 240°F), or air/f uel valve positio n (0% to 100% o pen). This function is enabled in the
Configuration Menu (Chapter 3, Table 3-4).
2.12.7 EXHAUST SENSOR IN
These terminals permit an exhaust sensor to be connected to the exhaust manifold of the heater.
2.12.8 INTERLOCKS
The unit offers two interlock circuits for interfacing with Energy Management Systems and auxiliary
equipment such as pumps or louvers or other accessories. These interlocks are called the Remote
Interlock and Dela yed Interlock (Figure 2-12). T he wiring terminals for these interlocks ar e located inside
the I/O Box on the left side of the unit. The I/O Box cover contains a wiring diagram which shows the
terminal strip locations for these interlocks (REMOTE INTL’K IN and DELAYED INTL’K IN). Both
interlocks, described below, are factory wired in the closed position.
NOTE:
Both the Delayed Interloc k and Remote Interlock must be in the clos ed pos iti on for the unit
to fire.
2.12.8.1 REMOTE INTERLOCK IN
The remote interlock circuit is provided to remotely start (enable) and stop (disable) the unit if desired. The
circuit is l abeled REMOTE INT L’K IN and is located inside t he I/O Box on the left s ide of the unit. The
circuit is 24 VAC and comes factory pre-wired closed (jumped).
2.12.8.2 DELAYED INTERLOCK IN
The delayed interlock is typically used in conjunction with the auxiliary relay described in paragraph
2.12.10. This interloc k circuit is located in t he purge sec tion of the star t string. It can be connec ted to the
proving device (end switch, flow switch etc.) of an auxiliary piece of equipment started by the unit’s
auxiliary relay. The delayed interlock must be closed for the heater to fire. If the delayed interlock is
connected to a proving device that requires time to close (make), a time delay (Aux Start O n Dly) that
holds the start sequence of the unit long enough for a proving switch to make (close) can be programmed.
Should the proving switch not prove within the programm ed time frame, the unit will shut down. T he Aux
Start On Dly can be programm ed from 0 to 120 seconds. This option is locate in the Configuration Men u
(Chapter 3).
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Installation USER MANUAL OMM-0079_0B
2.12.9 FAUL T RELAY
The fault relay is a single p ole double thr ow (SPDT ) relay having a nor mall y open and norm ally closed set
of relay contacts that are r ated for 5 amps at 120 VAC and 5 am ps at 30 VDC. T he relay energi zes when
any fault condition occurs and remains energized until the fault is cleared and the CLEAR button is
depressed. The fault relay connections are shown in Figure 2-12.
2.12.10 AU XILIARY RELAY CONT ACTS
Each unit is equipped with a single pole double throw (SPDT) relay that is energized when there is a
demand for heat a nd de-energized after the dem and for heat is satisfied. The relay is provided for the
control of auxiliary eq uipment, such as pumps and louvers, or c an be used as a unit status ind ictor (fir ing
or not firing). Its contacts are rated for 120 VAC @ 5 amps. Refer to Figure 2-12 to locate the AUX RELAY
terminals for wiring connections.
2.13 FLUE GAS VENT INSTALLATION
AERCO Gas Fired Venting and Combustion Air Guide, GF-5050 (see Appendix K) must be consulted
before any flue or combustion air venting is designed or installed. Suitable, U/L approved, positive
pressure, watertight vent materials MUST be used for safety and UL certification. Because the unit is
capable of dischargi ng low temperature exha ust gases, the flue must be p itched back towards the u nit a
minimum of 1/4" per foot to avoid any condensate pooling and to allow for proper drainage.
While there is a positive flue pressure during operation, the combined pressure drop of vent and
combustion air systems must not exceed 140 equiva lent feet of 1.9” W.C. Fittings as well as pipe lengt hs
must be calculated as part of the equivalent length. For a natural draft installation the draft must not
exceed - 0.10” W .C. These factors must be planned into the vent installation. If the m aximum allowable
equivalent lengths of piping are exceeded, the unit will not operate properly or reliably.
For Massachusetts installations, the Heatfab Division of the Selkirk Corporation provides vent systems
which conform to all applicabl e requirem ents for installations within the Comm onwealth of Mass achusetts.
Contact information for this supplier is as follows:
Selkirk Corporation
Heatfab Division
130 Industrial Blvd.
Turners Falls, MA 01376
Phone: 1-800-772-0739
www.heat-fab.com
2.14 COMBUSTION AIR
The AERCO Gas-Fired He ater Venting and Combustion Air Guide , GF-5050 MUST be consulted before
any flue or inlet air venting is designed or installed. Air supply is a direct requirement of ANSI 223.1,
NFPA-54, CSA B149. 1 and local codes. These codes should be consulted before a perm anent design is
determined.
The combustion air must be free of chlorine, halogenated hydrocarbons or other chemicals that can
become hazardous when used in gas-fired equipment. Common sources of these compounds are
swimming pools, degreas ing compounds, plast ic processing, and ref rigerants. Whene ver the environm ent
contains these t ypes of chemicals, com bustion air MUST be su pplied from a clean area outdoors for the
protection and longevity of the equipment and warranty validation.
The more common methods of combustion air supply are outlined in the following paragraphs. For
combustion air suppl y from ducting, cons ult the AERC O GF-5050, Gas F ired Ven ting and Combus tion Air
Guide.
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2.14.1 Combustion From Outside the Building
Air supplied from outside the building must be provid ed through two permanent openin gs. For each unit
these two openings m ust have a free area of not less than one squar e inch for each 4000 BTUs input of
the equipment or 250 s qu ar e inch es of f r ee area. T he f r ee area must take into account r es tr ic tio ns s uc h a s
louvers and bird sc reens. For Canada i nstallations , refer to the requirem ents specified in CSA B149.1-10,
8.4.1 and 8.4.3.
2.14.2 Combustion Air from Inside the Building
When combustion air is provided from within the building, it must be supplied through two permanent
openings in an interior wall. Each opening must have a free area of not less than one square inch per 1000
BTUH of total input or 1000 square inches of free area. The free area must take into account any
restrictions, such as louvers.
2.15 SEALED COMBUSTION
The AERCO Innovation Water Heater is UL listed for 100%-sealed combustion. For sealed combustion
installations, the screen inlet air ductwork must then be attached direc t l y to the unit’s air inlet.
In a sealed combustion air application, the combustion air ducting pressure losses must be taken into
account when calculat ing the total maximum allowable v enting run. See the AERCO Innov ation Venting
and Combustion Air Gui de, GF-5050. When using the heater in a sealed c ombustion air configuration,
each unit must have a minimum 6 inch diameter connection at the unit.
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Chapter 3 Innovation Series Water Heater s GF-128
Operation USER MANUAL OMM-0079_0B
CHAPTER 3. OPERATION
3.1 INTRODUCTION
The information in this Chapter provides a guide to the operation of the Innovation Water Heater using the
Control Panel mounted on the front of the unit. It is imperative that the initial startup of this unit be
performed by factor y trained personnel. Oper ation prior to initial startu p by factor y trained personnel will
void the equipment w arr ant y. In ad dit io n, th e f oll o wing WARNINGS and CAUT ION S must be observed at
all times.
CAUTION
All of the installation procedures in Chapter 2 must be completed before
attempting to start the unit.
WARNING
ELECTRICAL VOLTAGES IN THIS SYSTEM INCLUDE 120 AND 24 VOLTS AC.
IT MUST BE SERVICED ONLY BY FACTORY CERTIFIED SERVICE
TECHNICIANS
WARNING
DO NOT ATTEMPT TO DRY FIRE THE UNIT. STARTING THE UNIT
WITHOUT A FULL WATER LEVEL CAN SERIOUSLY DA MAGE THE UNIT AND
MAY RESULT IN INJURY TO PERSONNEL OR PROPERTY DAMAGE. THIS
SITUATION WILL VOID ANY WARRANTY.
3.2 CO NTROL PANEL DESCRIPTION
The Innovation Control Panel shown in Figure 3-1 contains all of the controls, indicators and displays
necessary to opera te, adjust and troubleshoot the I nnovation Water Heater. T hese operating controls,
indicators and displays are listed and described in Table 3-1. Additional information on these items is
provided in the individual operating procedures provided in this Chapter.
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Figure 3-1. Control Panel Front View
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FUNCTION
Operation USER MANUAL OMM-0079_0B
Table 3-1 Operating Controls, Indicators and Displays
ITEM
NO.
CONTROL, INDICATOR
OR DISPLAY
LED Status Indicators
1
COMM
MANUAL
REMOTE
DEMAND
OUTLET
2
TEMPERATURE
Display
3 VFD Display Vacuum Fluorescent Display (VFD) consists of 2 lines each
Four Status LEDs indicate the current operating status as
follows:
Lights when RS-232 communication is occurring
Lights when the unit is being controlled using the front panel
keypad.
Lights when the unit is being controlled by an external signal
from an Energy Management System
Lights when there is a demand for heat.
3–Digit, 7–Segment LED display continuously displays the
outlet water temperature. The °F or °C LED next to the
display lights to indicate whether the displayed temperature is
in degrees Fahrenheit or degrees Celsius. The °F or °C blinks
when operating in the Deadband Mode.
capable of displaying up to 16 alphanumeric characters. The
information displayed includes:
Startup Messages
Fault Messages
Operating Status Messages
Menu Selection
RS-232 Port
4
FAULT Indicator Red FAULT LED indicator lights when a heater alarm
5
CLEAR Key Turns off the FAULT indicator and clears the alarm message
6
READY Indicator
7
ON/OFF Switch
8
LOW WATER LEVEL
9
TEST/RESET Switches
Port permits a Laptop Computer or External Modem to be
connected to the unit’s Control Panel.
condition occurs. An alarm message will appear in the VFD.
if the alarm is no longer valid. Lockout type alarms will be
latched and cannot be cleared by simply pressing this key.
Troubleshooting may be required to clear these types of
alarms.
Lights ON/OFF switch is set to ON and all Pre-Purge
conditions have been satisfied.
Enables and disables heater operation.
Allows operator to test operation of the water level monitor.
Pressing TEST opens the water level probe circuit and
simulates a Low Water Level alarm.
Pressing RESET resets the water level monitor circuit.
Pressing the CLEAR key (item 6) resets the display.
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FUNCTION
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Table 3-1 Operating Controls, Indicators and Displays – Continued
ITEM
NO.
CONTROL, INDICATOR
OR DISPLAY
10
MENU Keypad
MENU
BACK
▲ (UP) Arrow When in one of the main menu categories (Figure 3-2),
▼ (DOWN) Arrow When in one of the main menu categories (Figure 3-2),
CHANGE
Consists of 6 keys which provide the following functions for
the Control Panel Menus:
Steps through the main menu categories shown in Figure 3-
2. The Menu categories wrap around in the order shown.
Allows you to go back to the previous menu level without
changing any information. Continuously pressing this key
will bring you back to the default status display in the VFD.
Also, this key allows you to go back to the top of a main
menu category.
pressing the ▲ arrow key will select the displayed menu
category. If the CHANGE key was pressed and the menu
item is flashing, pressing the ▲ arrow key will increment the
selected setting.
pressing this key will select the displayed menu category. If
the CHANGE key was pressed and the menu item is
flashing, pressing the ▼ arrow key will decrement the
selected setting.
Permits a setting to be changed (edited). When the
CHANGE key is pressed, the displayed menu item will begin
to flash. Pressing the ▲ or ▼ arrow key when the item is
flashing will increment or decrement the displayed setting.
ENTER
11
12
AUTO/MAN Switch
VALVE POSITIO N
Bargraph
Saves the modified menu settings in memory. The display
will stop flashing.
This switch toggles the heater between the Automatic and
Manual modes of operation. When in the Manual (MAN)
mode, the front panel controls are enabled and the
MANUAL status LED lights.
When in the Automatic (AUTO) mode, the MANUAL status
LED will be off and the front panel controls disabled.
20 segment red LED bargraph continuously shows the
Air/Fuel Valve position in 5% increments from 0 to 100%
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