Lochinvar CGL075075 Installation Manual
COMMERCIAL GAS WATER HEATERS
300 Maddox Simpson Parkway
Lebanon, TN 37090
Phone: 615-889-8900 • Fax: 615-547-1000
Technical Service email: 2tech@lochinvar.com
www.Lochinvar.com
Instruction Manual
MODELS CG(N,L)075075, CG(N,L)075100
Series 300, 301
• For Your Safety •
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS
PURCHASED. IF YOU ARE UNSUCCESSFUL, PLEASE WRITE TO THE COMPANY LISTED ON THE RATING PLATE ON THE WATER HEATER.
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
PRINTED 1011 322874-000
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
1
SAFE INSTALLATION, USE AND SERVICE
Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater.
Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and
others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual. It is very important
that the meaning of each safety message is understood by you and others who install, use or service this water heater.
This is the safety alert symbol. It is used to alert you
to potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
DANGER indicates an imminently
DANGER
WARNING
CAUTION
hazardous situation which, if not avoided,
will result in death or injury.
WARNING indicates a potentially hazardous
situation which, if not avoided, could result
in death or injury.
CAUTION indicates a potentially hazardous
situation which, if not avoided, could result
in minor or moderate injury.
CAUTION used without the safety alert
CAUTION
All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message and
how to avoid the risk of injury.
The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of substances
known to the State of California to cause cancer, birth defects, or other reproductive harm, and requires businesses to warn of
potential exposure to such substances.
This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm. This
appliance can cause low level exposure to some of the substances included in the act.
• Qualied Installer or Service Agency: Installation and service of this water heater requires ability equivalent to that of a Qualied Agency
(as dened by ANSI below) in the eld involved. Installation skills such as plumbing, air supply, venting, gas supply, electrical supply are
required in addition to electrical testing skills when performing service.
• ANSI Z223.1 2006 Sec. 3.3.83: “Qualied Agency” - “Any individual, rm, corporation or company that either in person or through a
representative is engaged in and is responsible for (a) the installation, testing or replacement of gas piping or (b) the connection, installation,
testing, repair or servicing of appliances and equipment; that is experienced in such work; that is familiar with all precautions required; and
that has complied with all the requirements of the authority having jurisdiction.”.
symbol indicates a potentially hazardous
situation which, if not avoided, could result
in property damage.
IMPORTANT DEFINITIONS
• Gas Supplier: The Natural Gas or Propane Utility or service who supplies gas for utilization by the gas burning appliances within this
application. The gas supplier typically has responsibility for the inspection and code approval of gas piping up to and including the Natural
Gas meter or Propane storage tank of a building.
2
GENERAL SAFETY
3
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE............................2
GENERAL SAFETY..................................................................3
TABLE OF CONTENTS ............................................................4
INTRODUCTION ......................................................................4
Preparing for the New Installation .....................................4
GET TO KNOW YOUR WATER HEATER ................................5
INSTALLATION CONSIDERATION .......................................6,7
Rough In Dimensions........................................................6
Mixing Valve Usage ..........................................................7
Thermometers...................................................................7
LOCATING THE NEW WATER HEATER ........................... 8-10
Facts to Consider About Location ..................................8,9
Insulation Blankets ............................................................9
Combustion Air and Ventilation for Appliances
Located in Unconned Spaces .........................................9
Combustion Air and Ventilation for Appliances
Located in Conned Spaces ........................................9,10
INSTALLING THE NEW WATER HEATER .......................11-15
Water Piping ...................................................................11
Closed Water Systems ...................................................11
Thermal Expansion ....................................................11,12
Circulating Pump.............................................................12
Temperature-Pressure Relief Valve ................................12
Filling the Water Heater ..................................................13
Venting ...................................................................... 13-14
Gas Piping .................................................................14,15
Sediment Traps ...............................................................15
LIGHTING & OPERATING INSTRUCTIONS ....................16,17
TEMPERATURE REGULATION ............................................18
FOR YOUR INFORMATION ............................................. 18-20
Start Up Conditions ................................................... 18-19
Operational Conditions ..............................................19,20
PERIODIC MAINTENANCE ............................................. 20-23
Venting System Inspection..............................................20
Burner Inspection ............................................................20
Burner Cleaning .........................................................20,21
Housekeeping .................................................................21
Anode Rod Inspection.....................................................21
Temperature-Pressure Relief Valve Operation ...............21
Recommended Procedure for Periodic
Removal of Lime Deposits from Tank
Top Commercial Water Heaters ......................................21
Deliming Solvent ........................................................21,22
Tank Cleanout Procedure ...............................................22
Draining...........................................................................23
Drain Valve Washer Replacement ..................................23
Service ............................................................................23
LEAKAGE CHECKPOINTS ....................................................24
TROUBLESHOOTING GUIDELINES .....................................25
NOTES ...................................................................................26
WARRANTY ...........................................................................27
INTRODUCTION
Thank You for purchasing this water heater. Properly installed and
maintained, it should give you years of trouble free service.
Abbreviations Found In This Instruction Manual:
• UL - Underwriters Laboratories Inc.
• ANSI - American National Standards Institute
• NFPA - National Fire Protection Association
• ASME - American Society of Mechanical Engineers
• GAMA - Gas Appliance Manufacturer’s Association
• CAN - Canada
• EPACT - Energy Policy Act
• CSA - Canadian Standards Association
This gas-fired water heater is design certified by Underwriters
Laboratories Inc. under American National Standard/CSA Standard
for Gas Water Heaters ANSI Z21.10.3 • CSA 4.3 (current edition).
PREPARING FOR THE INSTALLATION
1. Read the “General Safety” section, page 3 of this manual rst and
then the entire manual carefully. If you don’t follow the safety rules,
the water heater will not operate properly. It could cause DEATH,
SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE.
This manual contains instructions for the installation, operation, and
maintenance of the gas-red water heater. It also contains warnings
throughout the manual that you must read and be aware of. All
warnings and all instructions are essential to the proper operation of
the water heater and your safety. Since we cannot put everything
on the rst few pages, READ THE ENTIRE MANUAL BEFORE
ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER.
2. The installation must conform with these instructions and the local
code authority having jurisdiction. In the absence of local codes,
the installation must comply with the current editions of the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 and the National Electrical
Code, NFPA 70 or CAN/CSA-B149.1 the Natural Gas and Propane
Installation Code and CSA C22.1. All documents are available from
the Canadian Standards Association, 8501 East Pleasant Valley
Road, Cleveland, OH 44131. NFPA documents are also available
from the National Fire Protection Association, 1 Batterymarch Park,
Quincy, MA 02269.
3. If after reading this manual you have any questions or do not
understand any portion of the instructions, call the local gas utility
or the manufacturer whose name appears on the rating plate.
4. Carefully plan the place where you are going to put the water
heater. Correct combustion, vent action, and vent pipe installation
are very important in preventing death from possible carbon
monoxide poisoning and res, see Figures 3 and 8.
Examine the location to ensure the water heater complies with
the “Locating the New Water Heater” section in this manual.
5. For California installation this water heater must be braced,
anchored, or strapped to avoid falling or moving during an
earthquake. See instructions for correct installation procedures.
Instructions may be obtained from California Ofce of the State
Architect, 400 P Street, Sacramento, CA 95814.
6. Massachusetts Code requires this water heater to be installed in
accordance with Massachusetts 248-CMR 2.00: State Plumbing
Code and 248-CMR 5.00.
7. Complies with SCAQMD rule #1146.2 and districts having
equivalent NOx requirements.
4
GET TO KNOW YOUR WATER HEATER - GAS MODELS
TYPICAL INSTALLATION
A Vent Pipe
B Drafthood
C Anode
D Hot Water Outlet
E Outlet
F Insulation
G Gas Supply
H Manual Gas Shut-off Valve
I Ground Joint Union
J Drip Leg (Sediment Trap)
K Inner Door
L Outer door
M Union
N Inlet Water Shut-off Valve
O Cold Water Inlet
P Inlet Dip Tube
REPLACEMENT PARTS AND DELIMING PRODUCTS
Replacement parts and recommended delimer may be ordered through authorized servicers or distributors. When ordering parts, provide
complete model and serial numbers (see rating plate), quantity and name of part desired. Standard hardware items may be purchased locally.
Q Temperature-Pressure Relief Valve
R Rating Plate
S Flue Bafe(s)
T Gas Control Valve/Thermostat
U Drain Valve
V Pilot and Main Burner
W Flue
X Metal Drain Pan
* INSTALL IN ACCORDANCE WITH
LOCAL CODES.
* DRIP LEG AS REQUIRED BY
LOCAL CODES.
* ALL PIPING MATERIALS TO BE
SUPPLIED BY CUSTOMERS.
TO VENT TERMINATION
ON ROOF
(T) GAS CONTROL VALVE/THERMOSTAT
(V) PILOT & MAIN BURNER - NATURAL GAS
**CLOSED WATER SYSTEMS ARE THOSE
WITH BACK FLOW PREVENTION DEVICES
INSTALLED IN THE WATER SERVICE LINE.
FIGURE 1.
5
(V) PILOT & MAIN BURNER - PROPANE GAS
THERMOCOUPLE
PILOT
BURNER
MAIN
BURNER
INSTALLATION CONSIDERATION
ROUGH IN DIMENSIONS
DIMENSIONS
Model
CG*075075
Natural & LP
CG*075100
Natural & LP
RECOVERY RATINGS
Model
CG*075075
CG*075100
Recovery ratings based on 80% thermal efciency.
Units
Inches
CM
Inches
CM 174.3 168.9
Input
Rating
Btu/Hr
A B C D E F G H J K L M
61 1/8
155.25
68 5/8 66 1/2
Rating
kW
Approx.
Gal.
Cap.
58 1/2
148.6
Approx.
Liter
Cap.
75,100 22 74 280
75,100 22 98 371
29 11/16
75.4
30 15/16
78.59
Temp.
TABLE 1.
26 1/2
27 3/4
Rise
15 3/16
67.3
70.5
38.6 10.2
15 3/16
38.6 10.2
C° 17 22 28 33 39 44
4
4
14 1/2
39.4
15 3/4
40.0 40.6
40.6
16
16
1 1/4
3.2 NPT NPT
1 1/4
3.2 NPT NPT
50
1 1/2
1 1/4
1/2
56 61 67 72 78
11 15/16
11 15/16
F° 30 40 50 60 70 80 90 100 110 120 130 140
GPH 243 182 146 121 104 91 81 73 66 61 56 52
LPH 916 686 550 456 392 343 305 275 249 230 211 196
GPH 243 182 146 121 104 91 81 73 66 61 56 52
LPH 916 686 550 456 392 343 305 275 249 230 211 196
6
30.3
30.3
MIXING VALVE USAGE
FOR TWO TEMPERATURE WATER
CIRCULATING RETURN LINE CONNECTIONS
TEMPERED WATER LOOP, IF USED, CONNECT TO POINT “A”.
STORED TEMPERATURE WATER LOOP, IF USED, CONNECT
TO COLD WATER INLET.
CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACKFLOW PREVENTER, CHECK VALVE OR WATER METER WITH
CHECK VALVE, PROVISIONS FOR THERMAL EXPANSION OF
WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED.
SINGLE TEMPERATUREMIXING VALVE APPLICATION
INSTALL THERMAL EXPANSION
TANK OR DEVICE IF CHECK VALVE
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE
USE TEMPERATURE AT FIXTURES, SEE TEMPERATURE
REGULATION ON PAGE 12. IF HIGHER PREHEAT
TEMPERATURES ARE NECESSARY TO OBTAIN
ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD
VALVE FOR HOT WATER SUPPLIED TO FIXTURES.
INSERT B - VACUUM
RELIEF VALVE
*INSTALL PER
LOCAL CODES
OR PRESSURE REDUCING
VALVE IS USED IN SUPPLY
WARNING
FIGURE 2.
THERMOMETERS (Not Supplied)
Thermometers should be obtained and eld installed as shown, see
Figure 2.
Thermometers are installed in the system as a means of detecting
the temperature of the outlet water supply.
This appliance has been design certied as complying with ANSI Z21.10.3-
CSA 4.3 current edition for water heaters and is considered suitable for:
Water (Potable) Heating and Space Heating: All models are
considered suitable for combination water (potable) heating and
space heating and not suitable for space heating applications only.
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated to a
temperature which will satisfy space heating, clothes washing, dish
washing, and other sanitizing needs can scald and permanently injure
you upon contact. Some people are more likely to be permanently
injured by hot water than others. These include the elderly, children,
the inrm, or physically/mentally handicapped. If anyone using hot
water in your home ts into one of these groups or if there is a local
code requiring a certain temperature water at the hot water tap, then
you must take special precautions. In addition to using the lowest
possible temperature setting that satises your hot water needs,
a means such as a *Mixing Valve should be used at the hot water
taps used by these people or at the water heater. Mixing valves are
available at plumbing supply or hardware stores. Consult a qualied
installer or service agency. Follow mixing valve manufacturer’s
instructions for installation of the valves. Before changing the factory
setting on the thermostat, read the “Temperature Regulation” section
in this manual, see Figures 15 and 16.
7
LOCATING THE NEW WATER HEATER
FACTS TO CONSIDER ABOUT THE LOCATION
Carefully choose an indoor location for the new water heater, because
the placement is a very important consideration for the safety of the
occupants in the building and for the most economical use of the
appliance. This water heater is not for use in manufactured
(mobile) homes or outdoor installation.
Whether replacing an old water heater or putting the water heater
in a new location, the following critical points must be observed:
1. Select a location indoors as close as practical to the gas vent or
chimney to which the water heater vent is going to be connected,
and as centralized with the water piping system as possible.
2. Selected location must provide adequate clearances for servicing
and proper operation of the water heater.
Installation of the water heater must be accomplished in such a manner
that if the tank or any connections should leak, the ow will not cause
damage to the structure. For this reason, it is not advisable to install the
water heater in an attic or upper oor. When such locations cannot be
avoided, a suitable metal drain pan should be installed under the water
heater. Metal Drain pans are available at your local hardware store. Such
a metal drain pan must have a minimum length and width of at least 2”
(51 mm) greater than the water heater dimensions and must be piped
to an adequate drain. The pan must not restrict combustion air ow.
Water heater life depends upon water quality, water pressure and the
environment in which the water heater is installed. Water heaters are
sometimes installed in locations where leakage may result in property
damage, even with the use of a drain pan piped to a drain. However,
unanticipated damage can be reduced or prevented by a leak detector
or water shut-off device used in conjunction with a piped drain pan.
These devices are available from some plumbing supply wholesalers
and retailers, and detect and react to leakage in various ways:
• Sensors mounted in the drain pan that trigger an alarm or turn off
the incoming water to the water heater when leakage is detected.
• Sensors mounted in the drain pan that turn off the water supply
to the entire home when water is detected in the drain pan.
• Water supply shut-off devices that activate based on the water
pressure differential between the cold water and hot water pipes
connected to the water heater.
• Devices that will turn off the gas supply to a gas water heater
while at the same time shutting off its water supply.
INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQUIDS
(VAPORS) ARE LIKELY TO BE PRESENT OR STORED (GARAGES,
STORAGE AND UTILITY AREAS, ETC.): Flammable liquids (such as
gasoline, solvents, propane [LP or butane, etc.] and other substances
such as adhesives, etc.) emit ammable vapors which can be ignited
by a gas water heater’s pilot light or main burner. The resulting
ashback and re can cause death or serious burns to anyone in the
area, as well as property damage. If installation in such areas is your
only option, then the installation must be accomplished in a way that
the pilot ame and main burner ame are elevated from the oor at
least 18 inches. While this may reduce the chances of ammable
vapors, from a oor spill being ignited, gasoline and other ammable
substances should never be stored or used in the same room or area
containing a gas water heater or other open ame or spark producing
appliance. NOTE: Flammable vapors may be drawn by air currents
from other areas of the structure to the appliance.
Also, the water heater must be located and/or protected so it is not
subject to physical damage by a moving vehicle.
This water heater must not be installed directly on carpeting.
Carpeting must be protected by metal or wood panel beneath the
appliance extending beyond the full width and depth of the appliance
by at least 3” (76.2 mm) in any direction, or if the appliance is installed
in an alcove or closet, the entire oor must be covered by the panel.
Failure to heed this warning may result in a re hazard.
8
Minimum clearances between the water heater and combustible
construction are 0 inch at the sides and rear, 4” (102 mm) at the
front, and 6” (153 mm) from the vent pipe. Clearance from the top
of the jacket is 12” (305 mm) on most models.
FIGURE 3.
FIGURE 3.
INSULATION BLANKETS
Insulation blankets are available to the general public for external use
on gas water heaters but are not necessary with these products. The
purpose of an insulation blanket is to reduce the standby heat loss
encountered with storage tank heaters. Your water heater meets or
exceeds the EPACT standards with respect to insulation and standby
loss requirements, making an insulation blanket unnecessary.
Should you choose to apply an insulation blanket to this heater, you
should follow these instructions (For identication of components
mentioned below, see Figure 1). Failure to follow these instructions
can restrict the air ow required for proper combustion, potentially
resulting in re, asphyxiation, serious personal injury or death.
A gas water heater cannot operate properly without the correct amount
of air for combustion. Do not install in a conned area such as a closet,
unless you provide air as shown in the “Locating The New Water Heater”
section. Never obstruct the ow of ventilation air. If you have any doubts
or questions at all, call your gas supplier. Failure to provide the proper
amount of combustion air can result in a re or explosion and cause
death, serious bodily injury, or property damage.
FIGURE 4.
If this water heater will be used in beauty shops, barber shops, cleaning
establishments, or self-service laundries with dry cleaning equipment,
it is imperative that the water heater or water heaters be installed so
that combustion and ventilation air be taken from outside these areas.
Propellants of aerosol sprays and volatile compounds, (cleaners,
chlorine based chemicals, refrigerants, etc.) in addition to being highly
ammable in many cases, will also change to corrosive hydrochloric
acid when exposed to the combustion products of the water heater.
The results can be hazardous, and also cause product failure.
• Do not apply insulation to the top of the water heater, as this will
interfere with safe operation of the draft hood.
• Do not cover the outer door, thermostat or temperature & pressure
relief valve.
• Do not allow insulation to come within 2” (50.8 mm) of the oor to
prevent blockage of combustion air ow to the burner.
• Do not cover the instruction manual. Keep it on the side of the
water heater or nearby for future reference.
• Do obtain new warning and instruction labels from the manufacturer
for placement on the blanket directly over the existing labels.
• Do inspect the insulation blanket frequently to make certain it
does not sag, thereby obstructing combustion air ow.
COMBUSTION AIR AND VENTILATION FOR
APPLIANCES LOCATED IN UNCONFINED SPACES
UNCONFINED SPACE is space whose volume is not less than
50 cubic feet per 1,000 Btu per hour (4.8 m
input rating of all appliances installed in that space. Rooms
communicating directly with the space in which the appliances are
installed, through openings not furnished with doors, are considered
a part of the unconned space.
In unconned spaces in buildings, inltration may be adequate to provide
air for combustion, ventilation and dilution of ue gases. However, in
buildings of tight construction (for example, weather stripping, heavily
insulated, caulked, vapor barrier, etc.), additional air may need to
be provided using the methods described in “Combustion Air and
Ventilation for Appliances Located in Conned Spaces.”
3
per kW) of the aggregate
COMBUSTION AIR AND VENTILATION FOR
APPLIANCES LOCATED IN CONFINED SPACES
CONFINED SPACE is a space whose volume is less than 50 cubic
feet per 1,000 Btu per hour (4.8 m3 per kW) of the aggregate input
rating of all appliances installed in that space.
9
Loading...