5
Specifications
Model
TDX-90
TDX-100
TDX-110
TDX-125
Input BTU/HR
126,000
140,000
154,000
175,000
Heat Capacity BTU/HR
110,000
121,000
132,000
148,000
Net Output BTU/HR
95,000
105,000
115,000
129,000
Firing Rate GPH
0.90
1.00
1.10
1.25
Supply
1 1/4”
1 1/4”
1 1/4”
1 1/4”
Return
1 1/4”
1 1/4”
1 1/4”
1 1/4”
Coil Capacity (WC Model)
5 GPM
5 GPM
5 GPM
5 GPM
Steady State
87.0
86.5
86.0
85.5
AFUE
87.0
86.5
86.0
85.5
Burner Model
Carlin EZ-1 PRO
Carlin EZ-1 PRO
Carlin EZ-1 PRO
Carlin EZ-1 PRO
Burner Model
Beckett NX
Beckett NX
Beckett NX
Beckett NX
A. Installation Instructions
1) Place the boiler on a level floor, preferably raised and as close to the chimney as possible.
Refer to the installers label to determine if the boiler may be installed on combustible flooring or
if non-combustible flooring is required. The minimum clearances for installation are shown
below. Reduced clearance installations must follow NFPA-31 guidelines. If the boiler is a Knock
Down (not packaged for ease of installation), install the jacket in accordance with the directions
provided in the jacket package, prior to piping.
Standard Clearances
Front
24”
Sides
6”
Rear
12”
Top
18”
Chimney Connector
18”
Floor Non-Combustible
2) Install the boiler piping. For location of piping refer to the Installation Drawing.
DANGER:
Boilers with tankless coils must be piped in accordance with the piping diagram
including installation of a tempering or mixing valve. Domestic hot water temperatures exceed-
ing 125°F will cause severe burns instantly or death by scalding.
WARNING:
Relief valve discharges and drain valve piping must be piped to a safe place of
discharge.
NOTICE:
TDX Series Boilers are provided with a built-in air scoop feature. This feature allows
quiet, air free operation of the hot water system by eliminating air pockets without installation of
air scoops. The supply line tapping in the top of the boiler extends approximately 1 inch below
the top of the boiler, allowing only air-free water to enter the heating system supply. Any air
trapped in the top of the boiler is purged through the 3/4” vent tapping. The 3/4" vent tapping
should be connected to an automatic float vent, a manual vent or piped to a conventional
expansion tank.
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