Williamson Series 2 - Ratings

47
Part Number 550-142-785/0812
GWI Series 2 Gas-Fired Water Boilers – Boiler Manual
15 Ratings
Notes
1. See information at rightformodelnumbersufxes.
2. BasedonstandardtestproceduresprescribedbytheUnitedStatesDepartmentof
Energy.
3. NetAHRIratingsarebasedonnetinstalledradiationofsufcientquantityforthe
requirementsofthebuildingandnothingneedbeaddedfornormalpipingandpickup.
Ratingsarebasedonapipingandpickupallowanceof1.15.Anadditionalallowance
shouldbemadeforunusualpipingandpickuploads.
4. VentsizeshownisforCategoryIIIventing(pressurizedvent).Seepage 8forrequired
ventsizingwhenchimneydraft(CategoryI)venting.
5. Contactyourlocaldealerregardinginformationandpartsforhighaltitudeapplica-
tions.
 InstallGWIboilersforresidentialradiantpanelsystems,convertedgravity
heating systems or other low water temperature applications per instruc-
tions in this manual to avoid damage due to condensation.
 GWIboilersareCSAdesigncertiedforinstallationoncombustibleooring.
 GWIboilersareASMEratedfor50psigworkingpressure.
Boiler
model
number
0–2,000 feet altitude 2,000–4,500 feet altitude
(Canada)
Net
I=B=R
ratings
(Btuh)
Boiler
water
content
(gallons)
DOE
seasonal
efficiency
(% A.F.U.E)
Vent
size
Input
(Btuh)
DOE Heating Capacity
(Output)
(Btuh)
Input
(Btuh)
Output
(Btuh)
(Note 1) (Note 2) (Note 5) (Note 3)
(Note 4)
GWI-047 47,500 39,900 42,750 35,910 37,000 1.5 83.0 3”
GWI-063 63,000 52,700 56,700 47,430 49,000 1.5 83.3 3”
GWI-095 95,000 79,800 85,500 71,820 73,000 2.1 83.0 3”
GWI-127 127,000 106,000 114,300 95,400 97,000 2.7 82.7 3”
GWI-158 158,000 131,500 142,200 118,350 121,000 3.3 82.4 3”
GWI-190 190,000 157,700 171,000 141,300 144,000 3.8 82.1 3”
DOE