Tarm Biomass Bonus Plus 30, Инструкция по установке и эксплуатации, Страница: 21 / 55

Bonus Plus Instructions Tarm Biomass 1-800-782-9927 Version 11/14 Page 21
Boiler Installation & Start-up > Connections to the Boiler
 The chimney connector sections must be attached to the boiler and to each other with the
crimped (male) end pointing away from the boiler. All joints, including the connection at the
boiler collar, must be secured with at least three sheet metal screws. All joints need to be
sealed with a hi-temperature (>500º F) silicone.
3.4.2 Safety Plumbing
OVERHEAT LOOP: NO ELECTRICITY: The piping and controls must be connected to the boiler
in such a way that in the event of a power failure there is one loop of radiation available for gravity
circulation. This loop must not be obstructed by any valves or other accessories which would prevent
gravity circulation during a power failure. The piping is plumbed in such a way that excessive pressure
will not be developed in any portion of the boiler or system. The loop must be large enough to dissi-
pate at least 10% of the boiler’s maximum rated heat output, assuming an ambient temperature of
65
°
F (18 ºC) and a mean water temperature of 180 ºF (82 ºC)
.
The minimum pipe size for this loop is ¾” (1” is recommended) and if possible, the loop should be
located and pitched to maximize natural thermal convection of the water. The loop must be positioned
above the boiler. The design of the loop must be such that it can be made inoperative only in a deliber-
ate manual action. If large enough, an existing heating radiation zone may be used for the over-heat
loop. The loop must be equipped with zone valves which will open automatically during a power fail-
ure. We recommend AUTOMAG zone valves for this application (offered as an accessory).
OVERHEAT LOOP: WITH ELECTRICITY: The HONEYWELL L4008B aquastat provided with
this boiler must be wired in parallel with the thermostat on the zone with the most heating capacity in
the main living area (dump zone). Upon reaching the aquastat set point, the dump zone will be acti-
vated, pulling heat away from the boiler. The home owner is alerted to a potential problem with the
boiler by an overly warm living space.
Do not use self contained, non electric zone valves in the zone controlled by the overheat control!
Such valves would prevent the overheat control system from the cooling the boiler when necessary.
NOTE
SYSTEM DESIGN: Consider provisions for handling excess heat produced by an overheating
boiler both with electricity and during a power failure.
NOTE
THE THERMAL STORAGE SYSTEM MAY NOT BE USED AS A DUMP ZONE!