Checklist For Problem-Free Installation And Safe Operation; Typical Installation Schedule For The Hwat-Plus System; Circuit Protection, Testing And Operation For All Systems - Raychem HWAT-ECO Handbuch

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 sys-
tem test repeated.
The supply voltage cables and circuit breakers are installed to each cir-
cuit.
The system is commissioned (see "System start-up" on page 31).

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 insula-
tion 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.
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