Camus Hydronics MICOFLAME GRANDE Series, Installation, Operation And Service Manual

Page: 19 / 56

15
e. Check the inlet temperature after
5 minutes and make final
adjustments.
7.6
INSTANTANEOUS WATER HEATER
An instantaneous appliance is designed to deliver
hot water without the use of a storage tank. It is
suitable for applications with variable load such
as restaurants, condominiums, apartments and
motels. (See figure 9) Call manufacturer for
recommendations.
7.7 HOT WATER SYSTEM PIPING
Piping and components connected to the
appliance must be suitable for use with potable
water. The appliance should not be connected to
any heating system piping or components
previously used with non-potable water. Hot
water storage tanks used in potable water system
must be equipped with temperature and pressure
relief valve. Figure 10 and 11 illustrates typical
water heating piping arrangement for single
appliance and multiple appliances.
The storage tanks must be located as close as
possible to the appliance to prevent excessive
pressure drop. The required flow through the
appliance is based on normal water hardness.
Water hardness above normal levels will require
higher flow rates to prevent scaling and Copper
Nickel heat exchanger tubes to prevent
erosion. Choose a pump for the local water
hardness conditions. Alternatively soften the
water to normal hardness level.
The appliance could be fitted with an
economizer (secondary heat exchanger) to
achieve nominal efficiency of 95%. This heat
exchanger is fabricated from stainless steel and
can accept inlet water temperature as low as
40ºF.
7.8 SELECTING A PUMP
For hydronic heating and DHW applications
with normal water hardness choose a pump
which will result in temperature rise across the
main heat exchanger of 20ºF to 35 ºF (11.1ºC-
19.4ºC) depending on the size of the heater. If
necessary, use a flow setter valve to achieve
the desired temperature rise.
For DHW applications with other than normal
water hardness choose a pump for the local
water hardness
conditions. Alternatively run the pump
continuously and soften the water to normal
levels. Damage to the heat exchanger as a
result of scaling or corrosive water conditions is
non-warrantable.