SBS-800 Series Operator & Planned Maintenance Handbook
Chapter 5
: Anti-Condensation Heater (ACH)
KH-1601-2 Issue 6
Page 33 of 80
5
Anti-Condensation Heater (ACH)
CONNECTION
The Anti-Condensation Heater is not connected as standard.
The ACH should only be connected where the SBS-800 system is to be switched OFF and left in an
un-powered state when high humidity levels are anticipated.
Please consult with Kelvin Hughes Ltd for advice on when to connect the anti-condensation heater
supply.
AC POWER
The Anti-Condensation Heater (ACH) is located within the SBS-800 transceiver/gearbox housing.
It is strongly recommended that the AC power to the heater is connected via an independent
source of single phase AC power controlled by a dedicated lockable breaker.
Where no separate AC supply is available, the AC mains to the transceiver can be moved
temporarily to the ACH supply
terminals.
Note
NOTICE
The Anti-Condensation Heater is NOT controlled, switched or monitored by the SBS-800 system.
ACH USAGE
It is not necessary to have the ACH switched ON when the system is in normal use.
When operating in areas of high humidity and the transmission system is to be left switched OFF
for any length of time, it is recommended that the ACH heater supply is left switched ON to avoid
condensation forming within the unit.
The ACH supply should be switched OFF when the system is made operational/is switched back
ON.
ACH SWITCH ON
Switch ON the ACH AC supply to the transceiver/gearbox using a dedicated AC mains breaker or
temporarily move the AC mains supply from the transceiver to the ACH.
Note
The heater switches ON
The heater is self-regulating using a built-in resistive temperature controller.
The heater level is factory set and needs no operator or maintainer adjustment. Once AC power
is applied no further operator intervention is required.
A red
neon marked ‘ACH’ within the gearbox/turning unit illuminates when the ACH AC Power is
switched on however this neon is NOT accessible to the operator.
Suitable warning must be put in place to advise users and maintenance teams that ACH AC
mains supply is present within the transceiver/gearbox.
ACH SWITCH OFF
Switch OFF the AC supply to the transceiver/gearbox using the dedicated AC mains breaker.
This removes power and switches the anti-condensation heater OFF.
SYSTEM ISOLATION
Please refer to section 4.5 for details on isolating the system from all sources of AC power.
Note:
All termination of the AC supply to the system must be carried out by a suitably qualified
technician observing the AC termination requirements and health & safety system isolation
requirements as described in the systems installation handbook reference KH-1601-1.
