42
3.
Overpressure
(1)
Install a properly sized expansion tank.
(2)
Do not exceed the boiler’s specific
requirements for maximum allowable
working pressure.
(3)
Do not plug or block the relief valve.
4.
Freezing
(1)
Run all portions of the system piping
inside a heated space unless the system
is properly protected with an inhibited
antifreeze solution.
5.
Overheating
(1)
Comply with the boiler’s specific
requirement for minimum water flow
through the boiler. See the
Specifications
Section of this manual.
(2)
Install a low-water cutoff device
whenever the boiler is installed above
the level of the lowest heat emitter
or radiator. Also add a low-water
cutoff when required by local code
requirements.
It is recommended that the LWCO control
is installed above the boiler to provide
the highest level of protection. However,
where the LWCO control is approved
by the LWCO control manufacturer for
installation in a high boiler tapping of a
water boiler, the use of the listed LWCO
control is permitted when it is installed
according to the LWCO manufacturer's
instructions.
6.
Thermal shock
(1)
Do not over-pump. Adhere to the design
flow requirements for each zone.
(2)
Install a boiler bypass, system bypass,
or primary-secondary loop when needed
to avoid returning large volumes of cold
water directly to a hot boiler.
7.
Condensation
(1)
Do not over-pump. Adhere to the design
flow requirements for each zone.
(2)
Adhere to the boiler’s specific
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 flows
within the specified 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.
9.
Combination Heating and Cooling Systems
If this boiler is used in connection with
refrigeration systems, the boiler must be
installed so that the chilled medium is piped
in parallel with the heating boiler using
appropriate valves to prevent the chilled
medium from entering the boiler, see Figure
D-W1. Also consult Residential Hydronic
Heating Installation and Design I=B=R
Guide.
If this Boiler is connected to heating coils
located in air handling units where they may
be exposed to refrigerated air, the boiler
piping must be equipped with flow control
valves to prevent gravity circulation of boiler
water during the operation of the cooling
system.
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.
APPENDIX D – System Piping (continued)
Figure D-W1: Recommended Piping for
Combination heating & Cooling
(Refrigeration) Systems
Содержание SERIES 3
Страница 5: ...5 Figure S 1 Minimum Clearances to Combustibles and Alcove Dimensions SPECIFICATIONS continued...
Страница 31: ...31 INTERNAL WIRING Figure IW 1 Wiring Diagram...
Страница 32: ...32 INTERNAL WIRING continued Figure IW 2 Wiring Schematic...
Страница 43: ...43 APPENDIX D System Piping continued Figure D W2 Recommended Water Piping for Zone Valve Zoned heating Systems...
Страница 44: ...44 APPENDIX D System Piping continued Figure D W3 Recommended Water Piping for Circulator Zoned heating Systems...
Страница 53: ...53 SERVICE RECORD DATE SERVICE PERFORMED...
Страница 54: ...54 SERVICE RECORD DATE SERVICE PERFORMED...
Страница 55: ...55 SERVICE RECORD DATE SERVICE PERFORMED...
Страница 56: ...56 U S Boiler Company Inc P O Box 3020 Lancaster PA 17604 1 888 432 8887 www usboiler net...
