INSTALLATION AND OPERATION INSTRUCTIONS
3
SL 26-260 G3, SL 40-399 G3 MODULATING GAS BOILERS
SPECIFICATIONS
SPECIFICATION
SL 26-260 G3
SL 40-399 G3
CSA Input (Natural Gas or Propane) - MBH
CSA Input (Natural Gas or Propane) - kW
CSA Output - MBH
CSA Output - kW
26 - 260
7.6 - 76.2
24.9 - 239
7.30 - 70.0
40 - 399
11.7 - 117
38.4 - 383
11.2 - 112
A.F.U.E
95%
Combustion Efficiency BTS-2000
Thermal Efficiency
96%
96%
Minimum gas supply pressure (Natural Gas or
Propane) - inch w.c.
4
4
Maximum gas supply pressure (Natural Gas or
Propane) - inch w.c.
14
14
Ambient temperature - Low °F / °C
High °F / °C
32°F / 0°C
122°F / 50°C
32°F / 0°C
122°F / 50°C
Max. relative humidity (non-condensing)
90%
90%
Minimum water temp.
34°F / 1°C
34°F / 1°C
Maximum water temp. (electronic hi-limit)
190°F/ 88°C
190°F/ 88°C
Max. ΔT - supply/return (electronic fence)
40°F
40°F
Power use (120Vac/60Hz) @ full fire - Watts
127 (less pumps)
345 (less pumps)
Weight (empty) - lbs/Kg
162 / 74
240 / 110
Heating Surface Area - ft
2
/ m
2
22.71 / 2.11
36.56 / 3.40
Pressure vessel water content - USG/Litres
5 / 19
7 / 26
Maximum boiler flow rate - USgpm
25
45
Minimum boiler flow rate - USgpm
6
20
Maximum operating water pressure* - psig
30
80
Minimum water pressure - psig
8
8
Approved installation altitude - ASL
0 - 12,000’
0 - 12,000’
Maximum equivalent vent length
Each side (Vent & Air Intake))
(Natural Gas or Propane)
Air intake options: either direct vent or indoor
supply
200’ (3")
200’ (4")
* boilers are shipped with 30 psig pressure relief valve.
