IBC SL 26-260 G3 - 1 Installation; General

1-1
INSTALLATION
SL 26-260 G3, SL 40-399 G3 MODULATING GAS BOILERS
1.0 INSTALLATION
1.1 GENERAL
The gas-red modulating boilers are low pressure, fully condensing units having a variable
input range. Approved as “Category IV” vented appliances, the boilers use either Direct
Vent (sealed combustion) or indoor combustion air, providing a great degree of installation
exibility.
The following table displays the required connection specications for each model.
Figures 1A and 1B show outer case dimensions, piping and electrical holes. Refer to
these gures to help with nding a suitable location for the boiler. See also Section 1.3
Location.
DESCRIPTION SL 26-260 G3 SL 40-399 G3
A Flue Outlet 3” Schedule 40 4" Schedule 40
B Combustion Air Inlet 3” Schedule 40 4" Schedule 40
C Safety Relief Valve and Air Vent 3/4" NPT - F 3/4" NPT - F
D Touchscreen display 2-1/4” x 4” 2-1/4" x 4"
E Water Outlet 1-1/2” NPT-M 1-1/2" NPT - M
F Water Inlet 1-1/2” NPT-M 1-1/2" NPT - M
G Knock-outs (8) 1/2” 1/2"
H Gas Inlet 3/4” NPT-F 3/4" NPT - F
I Condensate Outlet 3/4” Hose 3/4" Hose
Table 1: Connections