User Guide

5
Table 2.3: Vent Lengths
MODEL
NOMINAL
VENT/INTAKE
SIZE (in)
MIN VENT
LENGTH (in)
MAX VENT
LENGTH
APPROX.
DERATE AT
MAX VENT
(%)
GHE80 2 12 60ft 9
GHE80* 3 12 135ft 2
GHE100 2 12 60ft 15
GHE100* 3 12 135ft 3
GHE120 3 12 135ft 7
GHE150 3 52 135ft 7
GHE180 3 52 135ft 9
See Part VII (Venting) for additional requirements and details.
*Vent/Intake size increased from 2” to 3” at boiler connections.
III Before Installing
1) Safe, reliable operation of this boiler depends upon installation by a professional heating contractor in strict accordance
with this manual and the requirements of the authority having jurisdiction.
 • Intheabsenceofanauthorityhavingjurisdiction,installationmustbeinaccordancewiththismanual 
and the National Fuel Gas Code, ANSI Z223.1. In Canada, installation must be in accordance with the B149.1
Installation Code.
 • Whererequiredbytheauthorityhavingjurisdiction,thisinstallationmustconformtotheStandard for Controls
and Safety Devices for Automatically Fired Boilers (ANSI/ASME CSD-1).
2) Read Section VII to verify that the maximum combustion air and exhaust pipe lengths will not be exceeded in the
planned installation. Also verify that the vent terminal can be located in accordance with Section VII.
3) Make sure that the boiler is correctly sized:
• Forheatingsystemsemployingconvectionradiation(baseboardorradiators),useanindustryacceptedsizing
method such as the I=B=R Guide RHH published by the Air-Conditioning, Heating and Refrigeration Institute
(AHRI).
• Fornewradiantheatingsystems,refertotheradianttubingmanufacturer’sboilersizingguidelines.
• Forsystemswhichincludeanindirectwaterheater,makesuretheboilerhastheoutputcalledforbytheindirect
waterheatermanufacturer’sinstructions.
Table2.2:Specications
GHE Series
AHRI Ratings
OtherSpecications
MODEL*
MAXIMUM
INPUT
(MBH)
MINIMUM
INPUT
(MBH)
HEATING
CAPACITY
(MBH)
NET AHRI
RATING*
(MBH)
AFUE
(%)
WATER
VOLUME
(Gal.)
VENT
COLLAR
DIA.
SUPPLY &
RETURN
CONNECTION
SIZE (NPT)
GAS
CONNECTION
SIZE (NPT)
APPROX.
NET
WEIGHT
(lb)
GHE80 80 16 74 64 94.0 0.36 2” 1” 1/2” 81
GHE100 100 20 92 80 93.3 0.44 2” 1” 1/2” 83
GHE120 120 24 112 97 94.0 0.53 3” 1” 1/2” 86
GHE150 150 30 142 123 95.0 0.79 3” 1” 1/2” 111
GHE180 180 36 170 148 94.0 0.79 3” 1” 1/2” 111
* The Net AHRI Water Ratings shown are based on a piping and pickup allowance of 1.15. The manufacturer should be consulted before
selecting a boiler for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping
systems, etc.