LAARS EDN Series - Installation, Operation and Maintenance Instructions - Manual (Page 27)

Endurance Page 27
6.6.8 Field-Supplied Outdoor Reset
Controls
When a stand-alone outdoor reset control is used
with the Endurance, it will only have the ability to
reset the system water temperature, and start/stop a
call for heat. Although this will work, be aware that
this will likely cut into the modulation range that the
boiler control is calculating, because the boiler control
is not changing its temperature settings. This may
result in an Endurance that works like an on/off boiler,
rather than the modulating boiler, and may cycle on
and off more frequently than desired.
Endurance units have built-in outdoor reset
capability, with the addition of the outdoor reset
sensor. This will reset the boiler supply temperature,
while ensuring that the temperature is not dropped
enough to affect the EBP’s domestic water output, and
keeping the return temperature to the Endurance high
enough to prevent condensation on the heat exchanger.
IMPORTANT NOTE: The Endurance outdoor reset
is limited, to ensure that internal water temperature
is high enough to prevent heat exchanger
condensation. EBP units are limited further, to keep
the temperature of the water in the 20 gallon transfer
tank high enough to serve the domestic water plate
heat exchanger at all times.
SECTION 7.
Boiler Start Up
7.1 Removal of Boiler From
Common Vent
NOTE: This section does not describe a method for
common venting Endurance boilers. It describes
what must be done when a unit is removed from a
common vent system. Endurance boilers are not
permitted to be common vented with any other
appliance(s), including other Endurance appliances.
At the time of removal of an existing boiler, the
following steps shall be followed with each appliance
remaining connected to the common venting system
placed in operation, while the other appliances
remaining connected to the common venting system
are not in operation.
1. Seal any unused opening in the common venting
system.
2. Visually inspect the venting system for proper
size and horizontal pitch and determine there is
no blockage or restriction, leakage, corrosion and
other deficiencies which could cause an unsafe
condition.
3. Insofar as is practical, close all building doors
and windows and all doors between the space in
which the appliances remaining connected to the
common venting system are located and other
spaces of the building. Turn on clothes dryers
and any appliance not connected to the common
venting system. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, so they
will operate at maximum speed. Do not operate a
summer exhaust fan. Close fireplace dampers.
4. Place in operation the appliance being
inspected. Follow the lighting instructions.
Adjust thermostat so appliance will operate
continuously.
5. Test for spillage at the draft hood relief opening
after 5 minutes of main burner operation. Use
the flame of a match or candle, or smoke from a
cigarette, cigar or pipe.
6. After it has been determined that each appliance
remaining connected to the common venting
system properly vents, when tested as outlined
above, return doors, windows, exhaust fans,
fireplace dampers and any other gas burning
appliance to their previous conditions of use.
7. Any improper operation of the common venting
system should be corrected so the installation
conforms with:
1. The applicable venting requirements of the
National Fuel Gas Code (ANSI Z223.1/
NFPA 54), latest edition; or
2. in Canada, The Natural Gas and Propane
Installation Code (CSA B149.1), latest
edition.
All applicable provisions of local building codes
should also be adhered to.
When re-sizing any portion of the common
venting system, the common venting system should be
re-sized to approach the minimum size as determined
using the applicable section of the latest editions of the
above-referenced installation codes.
7.1 Enlèvement de la chaudière du
système de ventilation commun
REMARQUE : Cette partie ne décrit pas une
méthode pour les chaudières Endurance à ventilation
commune. Elle décrit ce qui doit être fait lorsqu’une
unité est enlevée d’un système de ventilation
commun. Il n’est pas autorise aux chaudières
Endurance d’avoir un système de ventilation
commun avec tout autre appareils, y compris d’autres
appareils Endurance.
Au moment du retrait d’une chaudière existante,
les mesures suivantes doivent être prises pour chaque
appareil toujours raccordé au système d’evacuation
commun et qui fonctionne alors que d’autres appareils
toujours raccordés au système d’évacuation ne
fonctionnent pas:
1. Sceller toutes les ouvertures non utilisées du
système d’évacuation.
2. Inspecter de façon visuelle le système
d’évacuation pour déterminer la grosseur