1.1.4 YKN2 Open Control Circuit
YKN2 Open YKN2 Open control board
The control circuit is 24 V and can operate with the
standard DPC-1 thermostat (communication) or with
a 24 V thermostat with control signals (Y1, G, O/B,
W).
A YKtoolsystem analyser can be used for easier start-
up and to locate and solve any installation or operat‐
ing faults.
1.1.5 Service and Maintenance Access
The units are fitted with access panels with 1/4 turn closures on the control panel and levers offering fast,
safe access to all components requiring service or maintenance.
Access to the control circuit is independent to the cooling system of the unit.
The unit is fitted with connections for specific manometers for easier reading of cooling circuit pressures.
1.2 Intended use of the unit
The VITALITY series of units is exclusively designed for the air conditioning of buildings and properties.
Therefore, the unit has a cold generating system, a heat pump and, as optional, auxiliary electrical re‐
sistors and hot water coil. Depending on the version that forces air to circulate through ducts to adjust
the temperature of the building or property where it is installed. The air conditioning unit has a start-up
and setting mechanism (by means of a thermostat) to manage its operations.
The unit should only be used for the purposes for which it was designed and built. Johnson Controls Inc.
shall not be considered responsible for any damage caused by inappropriate use or maintenance of the
unit that is any way inconsistent with that described in this document or others specifically provided with
the unit.
Any use other than air conditioning will be considered inconsistent.
1
User manual
1.2
Intended use of the unit
6
