Akw T301 설치, 서비스 및 사용자 지침 - 페이지 11

{카테고리_이름} Akw T301에 대한 설치, 서비스 및 사용자 지침을 온라인으로 검색하거나 PDF를 다운로드하세요. Akw T301 16 페이지. Basin mixer valve

In-Service Testing

The purpose of in-service testing is to regularly monitor the thermal performance

of the T301 mixing valve. Deterioration in performance can indicate the need for

service work to be carried out on the system.

If the authority concerned does not have a planned test and maintenance schedule

then the suggestions below should form the basis of a new system.

At intervals of 6-8 weeks and 12-15 weeks after commissioning:

1. Check supply parameters are still within the expected values if not check system

for faults.

2. Carry out commissioning procedures using the same test equipment, if the mixed

water temperature has changed a significant amount (by more than 1°C) check

to ensure in line filters are clean, that the check valves are working and all

isolation valves are fully open.

If no fault can be found check and record the mixed water temperatures

and re-adjust mixed water temperature to the values in table 3, complete the

commissioning procedure. If the mixed water temperature exceeds the values of

the maximum recorded temperature by more than 2°C the need for service work

is indicated.

Depending on the results of these two tests the following should be adopted

a) If a small change (e.g. 1°C to 2°C) occurs in one of these tests or there is no

significant change (e.g. 1°C maximum) then the next in service test should be 24

to 28 weeks after commissioning.

b) If small changes occur in both test or a larger change occurs in one test

(exceeding 2°C) then the next in service test should be carried out 18 to 21 weeks

after commissioning.

These results can then be used to set a service interval which tests have shown

can be used with no more than a small change in mixed water temperature. This

method of determining service intervals is used to take into account various

in–service conditions (i.e. water condition) that the valve may experience.