Biddle CITY Series - Connecting the Unit to the Central Heating Installation

INSTALLATION COMFORT AIR CURTAIN
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2. Fit a lock plate 3 to each suspension bracket.
Warning:
w The unit may fall down if you do not secure
the suspension.
3. Check whether the unit is suspended firmly:
- Try to push the unit from its suspension.
- Shake the unit for a few seconds.
Warning:
w Ensure you do not run any risk, should the
unit drop down.
2.5 Connecting the unit to the central heating installation
2.5.1 Particulars
Caution:
c The supply and return pipes of the central heating
system must be connected to the correct
corresponding connections 1. The directions are
indicated on the unit using arrows.
• The maximum permissible operating pressure of the hot
water circuit is specified on the type plate. It is based on a
water temperature of 110°C.
Caution:
c Biddle recommends the inclusion of a valve in each
pipe.
• The bleed valve 2 of the heat exchanger is located at the
left in the top of the unit.
2.5.2 Frost protection
Take the following precautions if you install the unit in a room
wher
e frost may occur:
• Provide for constant circulation o
f the water at the right
temperature;
• Add up to 20% glycol to the water when the unit is not in
operation during the winter
time;
• Or drain the system and the unit.