Venstar ACC0431 Dokumentacja Pobierz pdf (Strona 25)

CHECK OPERATION

Before starting the system to check operation of low ambient

temperature control, ensure that the power wiring and location of

control assembly are correct. To check operation of low ambient

temperature control:

1. Turn power on to system.

2. Set thermostat below room temperature.

3. Ensure that there is the standard 3 --minute time delay for the

microprocessor controlled high wall fan coil systems.

4. Check time delay of installed accessories:

Under--ceiling (40QAC/QAQ) fan coils using the duct-- free

24--v thermostat delay settings: 2 or 4 minute delay.

The outdoor-- fan motor will not operate until the condensing

pressure reaches the control set point of 295 psig for

38MVC/MVQ models or 362 psig for 38QRF-- 018--036 and

38QRR-- 018--060 models (± 10 psig). When the set point is

reached, the outdoor fan will cycle to maintain the set point

condensing pressure.

If the low ambient temperature control does not operate correctly:

S Ensure that power is being supplied to the system.

S Check condensing pressure: if condensing pressure is below 255

psig for 38MVC/MVQ models or 321 psig for 38QRF-- 018-- 036

and 38QRR -- 018-- 060 models, the outdoor--fan motor should be

off and there should be no voltage across the 2 blue fan power

leads coming out of the control. If condensing pressure is about

295 psig or greater for 38MVC/MVQ models or 362 psig for

38QRF--018 --036 and 38QRR-- 018--060 models, the

outdoor-- fan motor should be on and will cycle off at around

255 psig for 38MVC/MVQ or 321 psig for 38QRF -- 018--036

and 38QRR -- 018--060 models.

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: IIK--53DS900--06

Replaces: AG--53DS900--01

Printed in U.S.A. Edition Date: 0 2/08

53DS-- 900-- -- -- 086, 095

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 36 37

Brak uwag

Venstar ACC0431 Dokumentacja Strona 25