6
D. INDIRECT-FIRED WATER HEATER
1. If a Partner indirect fired water heater or other,
refer to Figure 3.4 for typical piping. Also refer to
additional instructions supplied with the Partner.
E. CONTROLS
1. For complete information on servicing and
adjustment of controls, refer to the attached control
specification sheets.
2. This boiler is equipped with a water temperature
limit control which includes a low water cut-off
function.
3. For installations subject to UL726, a second operating
control that senses water temperature
is also required (not provided). Use an L4080B
or equivalent. Install in the supply piping near
the boiler.
4. For complete information on servicing and
adjustment of controls, refer to the attached control
specification sheets.
Figure 3.4
PIPING & CONTROLS
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy
Policy and Conservation Act, water boilers are
equipped with a feature that saves energy by
reducing the boiler water temperature as the heating
load decreases. This feature is equipped with an
override which is provided primarily to permit the
use of an external energy management system that
serves the same function.
THIS OVERRIDE MUST NOT BE USED UNLESS AT
LEAST ONE OF THE FOLLOWING CONDITIONS IS
TRUE:
• An external energy management system
is installed that reduces the boiler water
temperature as the heating load decreases.
• This boiler is not used for any space heating.
• This boiler is part of a modular or multiple boiler
system having a total input of 300,000 BTU/hr or
greater.
• This boiler is equipped with a tankless coil.
Figure 3.3
12" MIN.
3/4" CONTROL
TAPPING
TANKLESS
HEATER
HIGH TEMPERATURE
HOT WATER
MIXED
WATER
WATER
MIXER
COLD WATER INLET
FLOW CONTROL
