nVent.com | 29
5.4 Checklist for problem-free installation and safe operation
5.4.1 Typical installation schedule for hot water temperature
maintenance
General order of events:
The system is designed and the installation planned.
The pipework is pressure tested or otherwise checked for leaks.
The HWAT-L/R/M cable is tested and then installed on the
designated pipes.
The components are installed and each circuit is tested.
The correct thermal insulation is applied, without delay, labelled and
system test repeated.
The supply voltage cables and circuit breakers are installed to
each circuit.
The system is commissioned (see “System start-up” on page 30).
5.4.2 Circuit protection, testing and operation for all systems
Circuit protection
Supply voltage 230 VAC, 50 Hz
The required protective measures of the relevant regulations must
be complied with.
C type circuit-breaker (anti-surge fuse)
Residual current device (rcd 30 mA) required. Maximum approx.
500 m of self-regulating heating cable can be monitored per rcd.
Testing
Visual inspection for damage and fault-free installation of the
accessories
Proper installation of the system
Heating cable affixed to all necessary pipes
No mechanical damage to heating cable (e.g. cuts, cracks, etc.)
No thermal damage
Proper connection of all components including power supplies
Insulation resistance measurement when heating cable is received
and before and after installation of the thermal insulation. The test
voltage should be 2500 VAC, but it must not be lower than 500 VAC.
The insulation resistance, irrespective of the cable length, must not
be less than
10 MΩ. If the resistance falls below this value, the source of the fault
must be investigated, eliminated, and re-tested.
Measurement : Phase and neutral to the braid
After switching on, the cable ends must be warm after 5 to
10 minutes.
Содержание Raychem HWAT-ECO V4
Страница 2: ...2 nVent com 3 148 mm 1 2 A B C...
Страница 36: ......
Страница 70: ......
Страница 104: ......
Страница 129: ...nVent com 129 as oh evu potrub 2 50 54 SS okoln teplota 20 C as ud van v hodin ch as ud van v hodin ch Obr 12...
Страница 137: ...nVent com 137...
Страница 138: ......
Страница 139: ......