Biddle DF Series - Connecting the Unit to the Central Heating System

INSTALLATION COMFORT AIR CURTAIN
en-16
en
2. Screw a lock nut 1 onto each threaded rod.
3. Attach the unit to the threaded rods.
4. Secure the unit by tightening the lock nuts 1.
2.5 Connecting the unit to the central heating system
Only for water-heated units (type W)
See also:
6.2.2 "Opening the unit" on page 40
2.5.1 Particulars
Caution:
c The central heating system’s supply and return pipes
must be attached to the correct connectors 1. On
the unit, the directions are indicated using arrows.
• Keep the connectors 1 in place by using pliers when con-
necting the pipes.
• Biddle recommends inserting a valve and a venting valve on
both pipes close to the unit.
Application limitations for units with water heating
Heating medium water with max. 20% glycol
Max. water supply
temperature
90°C(194°F)
Max. discharge tem-
perature
70°C(158°F)
Maximum operating
pressure
8 bar(116 psi)