Install Instructions
49
APPENDIX D – System Piping (continued)
7. Condensation
(1) Do not over-pump. Adhere to the design
ow requirements for each zone.
(2) Adhere to the boiler’s specic
minimum return water and supply water
temperature requirements. Install a
boiler bypass, system bypass, or
primary-secondary loop when needed to
maintain water temperatures and ows
within the specied limits.
(3) Do not allow chilled water to enter the
boiler during the heating cycle, or heated
water to enter chilled water coils during
the cooling cycle.
8. Dry Fire
Install a low-water cutoff when the boiler
is installed above the level of the lowest
radiator and when required by local code.
i
The following system diagrams are intended to provide a minimum level of guidance for a
successful and trouble-free installation of the boiler in common applications. They do not substitute
for proper design, evaluation, and installation by a trained and qualified installer using the proper
tools, techniques, and design expertise. Not all options are available with every boiler.
Hot Water Boilers, Non-Condensing
Indirect Tank?
Two or more
zones of
the same
temperature?
Two or more
zones of
different
temperatures?
Two or
more
boilers?
See
Diagram
D-W1
D-W2
D-W3 Tankless Coil
D-W4
D-W5
D-W6