Series WTH
Page 5
LT105 Feb. 2019
Gas Supply Lines
Gas supply pipe sizing must be in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 in the USA
and CSA B149.1 and B149.2 Installation Codes in Canada.
A 1/8
” NPT plugged tap must be installed in the gas line connection immediately upstream of the burner farthest
from the gas supply meter to allow checking of system gas pressure.
Electrical
All heaters must be electrically grounded in accordance with the National Electric Code, ANSI/NFPA 70 in the USA,
and the Canadian Electric Code, CSA C22.1 in Canada, and must comply with all local requirements.
Venting
Refer to the National Fuel Gas Code, ANSI Z223.1/NFPA 54 in the USA and CSA B149.1 and B149.2 Installation
Codes in Canada for proper location, sizing and installation of vents as well as information on clearance
requirements when penetrating combustible walls for venting purposes.
General Specifications
Gas Supply
Inlet Pressure
Natural Gas:
Minimum
Maximum
5.0
” W.C.
14.0
” W.C.
Propane Gas:
Minimum
Maximum
11.5
” W.C.
14.0
” W.C.
Manifold Pressure
Natural Gas:
3.5
” W.C.
Propane Gas:
10.5
” W.C.
Inlet Connection
Natural Gas or Propane:
½” female NPT
Electric Supply
120 VAC, 60 HZ, 1 Amp: 36
” cord with grounded 3 prong plug
Flue and Outside Air Connection
4
” O.D. male connection for flue adapter and outside air (optional) provided at the heater