Timeguard TRT044 - Manual (Page 2)

1. Introduction
TRT products are a cost effective
comprehensive range of thermostats and
controllers designed for internal use only.
The TRT044 is cylinderstat, with an easily
adjustable dial. It is designed to be
mounted to a domestic hot water
cylinder using a spring wire, and allows
the user to economically control the
temperature of the hot water. It can
be fitted to all hot water cylinders, or
alternatively it can be used as a pipestat
using the alternative wire strap supplied.
The TRT044 can be used to switch
a circulating pump, boiler, or most
common motorised zone valves. It can
also be used for switching domestic 13A
immersion heaters if required.
The electrical supply must be isolated
before attempting to install the TRT044.
.
80
70
1
C
2
60
50
40
°C
Easy
set dial
Cable
entry
Cylinder/Pipe
contact
Fig. 1a
TRT044 Cylinder/Pipe Thermostat
Side View
A cylinder thermostat switches on and off
the heat supply from the boiler to the
hot-water cylinder. It works by sensing the
temperature of the water inside the cylinder,
switching on the water heating when the
temperature falls below the thermostat
setting, and switching it off once this set
temperature has been reached.
Turning a cylinder thermostat to a higher
setting will not make the water heat up
any faster. How quickly the water heats
up depends on the design of the heating
system, for example, the size of boiler and
the heat exchanger inside the cylinder.
The water heating will not work if a
time switch or programmer has switched
it off. And the cylinder thermostat will
not always switch the boiler off,
because the boiler sometimes
needs to heat the radiators.
Cylinder thermostats are usually fitted
between one quarter and one third of the
way up the cylinder. The cylinder thermostat
will have a temperature scale marked on it,
and it should be set at between 60ºC and
65ºC, then left to do its job. This temperature
is high enough to kill off harmful bacteria
in the water, but raising the temperature
of the stored hot water any higher will
result in wasted energy and increase
the risk of scalding.
If you have a boiler control thermostat,
it should always be set to a higher
temperature than that of the cylinder
thermostat. In most boilers, a single boiler
thermostat controls the temperature of
water sent to both the cylinder and
radiators, although in some there are
two separate boiler thermostats.
®
What is a cylinder thermostat?
...an explanation for householders
80
70
1
C
2
60 50
40
°C
Earth
terminal
Wiring
terminals
Fig. 1c
Rear View of TRT044
80
70
1
C
2
60
50
40
°C
Stylish
design
Temperature
adjustment
knob
Cover
retaining
screw
Clearly
marked
dial
Fig. 1b
Front View of TRT044