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Doc653/30CV02A
1.5 General restrictions
Stokvis products should always be used, installed and maintained in accordance with the statu-
tory requirements, specifi cations and standards applicable to these installations.
All the data, information and suggestions concerning its products provided by Stokvis are based
on careful study.
However, the use, installation and operation of the same are outside the control of Stokvis, and
neither Stokvis nor any other organisations associated with it, accept any liability for the same.
Changes may be incorporated without prior notice. Stokvis accepts no obligation to adapt previ-
ously delivered products to incorporate such changes.
2 Description
2.1 General
The Rendamax R30 wall mounted boilers are environmentally friendly gas fi red heating boilers
with a modulation range between approximately 14% and 100% of their maximum output (types
85, 100 and 120: 20% to 100%). The R30 series consists of three models of boiler with an output
range of 43 to 120 kW. The appliances have low NO
x
and CO emission, which satisfy the most
stringent environmental requirements.
The R30 series has received CE Approval for all relevant European countries and has been regis-
tered under the Product Identifi cation Number 0063BO3192.
The boilers may be used on both open (category B23) as well as room sealed (category C13, C33,
C43, C53, C63 or C83) systems.
As standard, the boiler is delivered fully wired, fully assembled, and tested.
Working principle and design
Air is drawn in as required, via a speed controlled fan. The zero pressure controller of the gas
valve measures the under pressure in the venturi and modulates the gas in response to this pres-
sure from the fan. The gas/air is then thoroughly mixed in the correct ratio and fi red directly into
the burner.
A temperature controller compares the actual water fl ow temperature to the desired water tem-
perature. The controller interprets the load required and adjusts the fan speed. The fan sends a
speed feed-back signal, and the controller re-adjusts the speed as required.
The mixture of gas and air that is formed is then conveyed through the cylindrical stainless steel
burner for combustion.
The heat exchange takes place in a double heat exchanger block. The fi rst heat exchanger is lo-
cated immediately next to the burner, while the second heat exchanger is connected downstream
(condenser). Both heat exchangers consist of several smooth pipes in the form of a coil. The two
heat exchangers are connected to each other using water distribution manifolds. The water is
circulated by the boiler pump. This pump will be in the boiler for types 45, 65 and 85 and external
for the types 100 and 120 (separate delivered).
The R30 boiler has a low water capacity. Due to this, rapid changes of the water temperature can
be achieved. It can be used without any return temperature protection. The installed pump pro-
vides the water fl ow rate required. This pump has three-stage modulation (types 45, 65 and 85).
Содержание ECONOFLAME R30
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