13
2.
For the Installer
2.3 System
These boilers/heaters are designed and approved as heat generators for hot water heating systems
with permissible fl
ow temperatures of up to 194 °F / 90 °C.
The maximum flow temperature is factory-set at 185 °F / 85°C. They may be installed
only in sealed systems
.
2.3.1 Standards
The following UL listed components must be completely unobstructed on the boiler/heater:
– Pressure Relief Valve with 30 psi opening pressure Article no.: 003493
– Low Water Cut-Off with Manual Reset for 110–120 V 15 A Article no.: 003495
– Pressure Gauge Article no.: 003494
– Expansion Tank with at least 15% total system water volume capacity Article no.: 003496, 003497, 003498
– Automatic Air Vent Article no.: 003499
READ and FOLLOW installation instructions for proper flue sizing and flue design!
All flue systems must meet UL103. All flue systems must be water resistant (stainless steel) and insulated (double
wall system).
DO NOT INSTALL BAROMETRIC DAMPER OR PRESSURE RELIEF VALVE IN LIVING OR SLEEPING AREA!
2.3.2 Operation with external control and buffer only
The following requirements must be met.
– an acumulatorr tank (min 100 gal) is mandatory
– a return hold up group = boiler protection group (113 °F / 45 °C) is mandatory
– To ensure the boiler minimum temperatures and the pump lag time, the transfer/hot water tank circuit pump
and the external heat requirement must be connected on the electrical panel to the intended terminals.(see
BioWIN XL connection diagram).
2.3.3 Heating water
CAUTION
The chemical composition of the heating water must conform with local legislation
and meet the directives, guidelines and standards.
Applicable for Austria (e
xcerpt from ÖNORM H 5195):
a) According to ÖNORM M 5195 (2010 edition), the condition of the heating water must be checked every 2 years
by a heating technician in order to avoid corrosion and sediment accumulation in the heating system.
b) The pipe lines and heating appliances should be thoroughly rinsed before the boiler is connected.
c) To protect the boiler from contamination from the heating system,
installation of a dirt trap
is required in old
or existing systems 5 with maintenance cocks installed in the return line.
d) If oxygen diffusion or sludge build-up cannot be prevented, the system must be segregated by means of a heat
exchanger.
e) If antifreeze is used, a
minimum volume of 25 % antifreeze
is required, otherwise corrosion prevention is not
guaranteed.