Flexible Water Pipes; Technical Specification For The Heating/Cooling Changeover Switch - Carrier Atmosphera 42EM Series Manual

7.2 - Flexible water pipes

7.2.1 - Materials
• Pipes: MEPD-based elastomer (modified ethylene-
propylene-diene)
• Braid: 304L stainless steel
• Insulation: cellular foam rubber with M1 fire rating
(9 mm thick, chilled water pipes only).
7.2.2 - Characteristics
• Minimum bending radius: non-insulated 35 mm,
insulated 75 mm
• Ten-year guarantee
• The flexible water pipes are designed for treated or
untreated water (maximum 40% ethylene glycol or
propylene glycol).
• Maximum hot water temperature 90°C
• Maximum operating pressure: 16 bar
• Test pressure: 24 bar
• 1/2" flat gas connections
• Length: 1 m.
7.3 - Technical specification for the heating/cooling
changeover switch
The heating/cooling changeover switch is designed to be
installed straight onto the couplings of the 3-way valves on the
thermostat. It detects temperature changes in the fluid
circulating in the primary water circuit. A changeover switch
operates according to the water temperature in accordance
with the diagram below.
Cable length 1 m
When a heating/cooling changeover switch is connected
between the room thermostat and the water flow control valve,
the changeover between heating and cooling modes takes
place automatically in accordance with the following diagram.
HM
CM
∆: Differential 11.1 K ± 3.3
CM: Cooling mode
HM: Heating mode
T°: Water temperature in °C
Brown
Black
FM
Red
Blue
Brown
AB B
Changeover
T°
A
25