Biddle Innovair School, Инструкция по установке, эксплуатации и обслуживанию, Страница: 19 / 27

Page 19 v2.1
Section 3. ELECTRICAL CONNECTIONS -
continued
CONNECTING THE UNIT TO A BMS
Please refer to the Innovair Engineering Guide for details on how the unit can be
connected to a BMS network.
CONNECTING THE UNIT TO A TIMER CLOCK OR P.I.R. Sensor
Unless using a BMS (or other supervisory system) to enable the unit, the unit is
controlled by linking across the Timer terminals on the main terminal strip in the
unit where linked = ‘on/occupied’.
Connections should be made on site to either a PIR, low water temperature stat
(used in conjunction with a Summer/Winter switch) or other volt free contacts.
When connecting a low water stat, follow the below instructions. You should
include a summer/winter switch in the design to allow the unit to operate in
Summer when there is no hot water available.
 Using the typically supplied Siemens RAM1 – connect terminals 1 and 3 to
the Timer connections (note polarity doesn’t matter).

Connect the summer/winter switch in parallel across the T4. It is
recommended that in public spaces, this switch is located discretely so it
isn’t tampered with.
 Fix the RAM1 to the supply side of the pipework - not the unit side.

Tidy all wiring up
When connecting a PIR sensor:
 Please refer to the PIR sensor manufacturer’s documentation – the
contacts MUST be volt free.