Lennox GWB84-262E User manual

PN 240013089, Rev. A [09/30/2020]
GAS FIRED BOILER
INSTALLATION
INSTRUCTIONS
PRODUCT LITERATURE
Lennox Industries Inc.
Dallas, Texas
This boiler cannot be used with all types of
chimneys. Read these instructions carefully
before installing.
GAS-FIRED HOT WATER BOILERS
These Gas-Fired Water boilers are low pressure,

     
Natural and Propane Gases. They are constructed
and hydrostatically tested for maximum working
        
     



Tested for 50 psi. ASME
Working Pressure
C.S.A. Certied for
Natural gas or Propane


Retain These Instructions for
Future Reference
These instructions must be axed on or
adjacent to the boiler.
WARNING


property damage. Refer to this manual. For
assistance or additional information consult
      
gas supplier.
!

2
Fully Assembled Boiler Vent Damper Pump (Optional) *Drain Valve
*ASME Safety Relief
Valve *Tridicator *Fuse Link w/ Instruction Tag *Nipple 3/4”x6-1/2 “

Documents and Warranty
11x17 Wire Diagrams
Document Package *Circulator Harness
Information and specications outlined in this manual in eect at the
time of printing of this manual. Manufacturer reserves the right to
discontinue, change specications or system design at any time without
notice and without incurring any obligation, whatsoever.

KEEP THIS MANUAL NEAR BOILER
RETAIN FOR FUTURE REFERENCE
For Parts lists see manual 240013151 included with your boiler literature package.
ITEMS INCLUDED WITH YOUR BOILER
PN 240013089 Rev. A [09/30/2020]

3
1 - Dimensions................................................................................ 
 ...................................................... 5
 ..................................................................... 7

 .......................................................

 ..............................................................17
 ......................................................................
.........................................................................
10 - Wiring Diagram........................................................................
 .................................................................
.................................................................
................................................................
 ...........................................................................
 .............................................................
.....................................................
 ..........................................................
 ............................................................30
................................................

TABLE OF CONTENTS
PN 240013089 Rev. A [09/30/2020]

4
1 - DIMENSIONS
Figure 1 - Dimensions

*
PN 240013089 Rev. A [09/30/2020]
Table 1 - Dimensions
BOILER
MODEL
NUMBER
DIMENSIONS (INCH.)
FLUE
DIAMETER
“A”
WIDTH
 7½
 7 30¾


5
2 - SAFETY SYMBOLS AND WARNINGS
CAUTION


!!
WARNING


!
DANGER


!


safety messages following this symbol to avoid



2.1. Safety Information
WARNING
Do not tamper with or use this boiler for any
purpose other than its intended use. Failure to follow
these instructions could result in death or serious

and accessories.
!
CAUTION


appropriate personal protection equipment to
include safety glasses and gloves when installing
or servicing this boiler. Failure to follow these

!!
NOTICE


WARNING
Fire, explosion, asphyxiation and electrical shock


all requirements before beginning installation.
!
FOR YOUR SAFETY READ BEFORE OPERATING
Hot Water Can Scald!
Water heated to temperature for clothes washing,




hot water. Never leave them unattended in bathtub or
shower. Never allow small children to use a hot water
tap or draw their own bath.

description, or if state laws or local codes require
certain water temperatures at hot water taps, you
must take special precautions:
• 
• 
an automatic mixing valve, at hot water tap or

selected and installed according to manufacturer's
recommendations and instructions.
• Water passing out of drain valves may be

• 
• 
DANGER
!
Water
Temperature
Seng
1st Degree Burn
Exposure Time For
An Adult
2nd and 3rd Degree Burn
Exposure Time For An
Adult
120° F 1 minute 5 minutes
130° F 5 seconds 30 seconds
140° F 2 seconds 5 seconds
150° F 1 second 1.5 seconds
160° F Instantaneous 0.5 seconds
Note:
Great care must be taken when exposing the
aforementioned groups to warm or hot water as they
can be badly burned in exposure times less than half
of the time for an adult.
PN 240013089 Rev. A [09/30/2020]

6
WARNING
Keep boiler area clear and free from combustible

liquids.






When this product is installed in the Commonwealth

by a Licensed Plumber or Licensed Gas Fitter.
!
WARNING
Combustion chamber insulation in this product

can be converted to cristobalite in very high



or cristobalite from occupational sources is




for cristobalite at the time this document was



 https://www.cdc.gov/niosh/topics/
silica/.
and phone numbers are also listed on this website.


combustion chamber lining to prevent dust. Wash
potentially contaminated clothes separately from
other clothing. Rinse clothes washer thoroughly.


!
2.2 For Your Safety 2.2 For Your Safety




WARNING


electrical problems, corrosion, inoperative parts,
mold and other unforeseen issues which can


excess of water or other liquid, shall be replaced.
Failure to follow these directions will result in a

!
2 - SAFETY SYMBOLS AND WARNINGS

reference.
PN 240013089 Rev. A [09/30/2020]

7
3 -LOCATING THE BOILER
Table 2 - MINIMUM CLEARANCE DIMENSIONS
 
Top  
Rear  
  
  
Front  
  
  

protection clearances.


front of appliance to leading edge of side walls as shown
below.
1. 




2. 



3. 





provisions of the local building codes.
4. 
criteria with the gas manifold and control assembly on


5. 
are protected from water (dripping, spraying, rain,

replacement, condensate trap, control replacement,

6. Locate boiler on level, solid base as near chimney as
possible and centrally located with respect to heat
distribution system as practical.
7. 
servicing and cleaning.
8. When installed in utility room, door should be wide
enough to allow largest boiler part to enter, or to
permit replacement of another appliance such as water
heater.
Minimum Clearances to Combustible
Construction (as seen from above)

BOILER


Front
7"
Control

9. FOR INSTALLATION ON NON-COMBUSTIBLE
FLOORS ONLY - For installation on combustible


envelope provided with boiler and outlined in National
Fuel Gas CodeDo Not Install
Boiler on carpeting.
3.1 Installation Requirements
CAUTION

lift boiler without assistance.
!!
WARNING



!
PN 240013089 Rev. A [09/30/2020]

8
3.3 Boiler Location Considerations
• 

• 
boiler service or from safety relief valve discharge.
• 
electrical service.
• 
capable of supporting the weight of the boiler, water,
and equipment.
• 
wet.
3 - LOCATING THE BOILER
Items to Avoid Products Which May Contain These
Items Areas Where These Items May Be Found
Chlorine, Fluorine, and Compounds

Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing


De-icing salts or chemicals
Carbon Tetrachloride




Drywall dust
Road or gravel dust
Dryer lint
Cat litter






Cements, adhesives and glues
Photo processing plants
Garages with workshops

establishments
Laundry Chemicals
Laundry detergents, bleaches, fabric
softeners, etc.

Dry cleaning/laundry areas and
establishments

Permanent wave solutions

the refrigerant may be leaking from the


Refrigeration repair shops
Notes:








Table 3-1: CONTAMINANTS
• 
• 

manufacturer for use with closed water heating system.
Do not use automotive or ethylene glycol.
PN 240013089 Rev. A [09/30/2020]

9
4 - CONNECTING SUPPLY AND RETURN PIPING
RELIEF VALVE
DISCHARGE
LINE
Check local
codes for
maximum
distance
from oor
or allowable
safe point of
discharge.
Figure 2 - Safety Relief Valve
1. 



2. 
position.
3. 
relief valve.
4. 

• 
• 
or greater.
• 
of other discharge piping.
• 
safety relief valve relieving capacity below minimum
relief valve capacity stated on rating plate.
• Run pipe as short and straight as possible to location
protecting user from scalding and properly drain
piping.
• 
• 

• 
• Terminate freely to atmosphere where discharge is

WARNING

discharge steam or hot water during operation.

!
WARNING

installed with spindle in upright position only,


!
PN 240013089 Rev. A [09/30/2020]

10
4.3 Flush and Rinse System
Flush the entire system and rinse thoroughly to ensure no
sludge will be introduced into the heating body of the boiler.
WARNING
• 
use ethylene glycol.
• Never use automotive or standard glycol

systems.
• 
in hydronic systems.
• Do not use petroleum based cleaning or sealing
compounds boiler system.
• 
water.
• 

use with closed water heating system.
• 

• 

NOTICE

appropriate safeguards and alarms on the heating

and burst pipes should the boiler heating system
become inoperative due to a power outage, safety
lockout or component failure.
4.4 Water Treatment


based on the analysis results. For extremely hard water or



based on the analysis results.

local water treatment company.
• I

or malfunction could be caused. Recommended water
quality is :
  
  
  
• 
water treatment specialist for recommendations.
•          
products or products containing mineral oil or hydrocarbons
in order to avoid likely damage to parts made from rubber

4 - CONNECTING SUPPLY AND RETURN PIPING
!
PN 240013089 Rev. A [09/30/2020]