Siemens LMS14 User Manual

177/617
Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 07.05.2014
6.6 Cooling circuit 1
For operation of a cooling circuit, the Cooling function must be activated via Operating
mode (901) and a multifunctional relay output QX for Refrigeration request K28 must be
configured. Cooling operation is started automatically when the room temperature
exceeds the Comfort setpoint for Cooling. That setpoint can be adjusted via Comfort
setpoint (710) of menu Heating circuit 1. Cooling operation is aborted when there is a
heat request from heating circuit 1.
The Cooling function is deactivated in the following cases:
 Room sensor not available
 Protection setpoint (904) set to OSV ( - - - )
6.6.1 Operating mode
Line no. Operating line
901 Operating mode
Off
Automatic
The operating mode for cooling can be selected via this operating line.
Note!
This selection is analogous to the operating mode selection for cooling via a cooling
mode button on a room unit.
Off
Cooling mode is deactivated.
Automatic
Automatic operation based on room temperature control.
Note!
In terms of function, the cooling mode button can be used as an On/Off button.
6.6.2 Setpoints
Line no. Operating line
904 Protection setpoint
The room temperature ensured by the Protection setpoint prevents the room from
overheating, provided the LMS14… is in Standby mode. Cooling is automatically
switched on when the room temperature exceeds this value by Room temp limitation
(932) and is switched off again when the room temperature drops below the protection
setpoint.
Operating mode
Protection setpoint

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English