Technical information

28
MTS (GB) Limited support the initiative. In Sections 11
and 12 of this manual you will find the commissioning
checklist (page 78) and the service interval record (Page 79), It
i
s important the commissioning checklist is completed
in the presence of your customer, they are shown how to use it,
a
nd it is signed by them. Please instruct your customer that they
must have this manual with them whenever they contact a
s
ervice engineer or us.
P
reliminary electrical system checks to ensure electrical safety
must be carried out by a competent person i.e. polarity, earth
continuity, resistance to earth and short circuit.
FILLING THE HEATING SYSTEM:
Lower the control panel and remove the case panels (see
SECTION 2.12 for further information).
O
pen the central heating flow and return cocks supplied with the
connection kit.
Unscrew the cap on the automatic air release valve one full turn
and leave open permanently.
Close all air release valves on the central heating system.
Gradually open valve(s) at the filling point (filling-loop) connection
to the central heating system until water is heard to flow, do not
open fully.
Open each air release tap starting with the lowest point and close
them only when clear water, free of air, is visible.
Purge the air from the pump by unscrewing the pump plug
anticlockwise, also manually rotate the pump shaft in the
direction indicated b
y the pump label to ensure the pump is
free.
Refit the pump plug.
Continue filling the system until at least 1.5 bar registers on the
pressure gauge.
Inspect the system for water soundness and remedy any leaks
discovered.
FILLING
OF
THE
D.H.W. SYSTEM:
Close all hot water draw-off taps.
Open the cold water inlet coc
k supplied with the connection kit.
Open slowly each draw-off tap and close them only when clear
water, free of bubbles, is visible.
GAS SUPPLY:
Inspect the entire installation including the gas meter
, test f
or
tightness and purge the supply as described in BS 6891:1988.
Open the gas cock (supplied with the connection kit) to the
appliance and chec
k the gas connections on the appliance f
or
leaks
.
WATER TREATMENT
The detailed recommendations f
or water treatment are given in
BS 7593:1992 (Treatment of water in domestic hot water central
heating systems); the following notes are given for general
guidance:
- If the boiler is installed in an existing system, any unsuitable
additiv
es m
ust be removed;
- Under no circumstances should the boiler be fired before the
system has been thoroughly flushed; the flushing procedure
must be in line with BS7593:1992.
Firstly fill the centr
al heating system and boiler with the po
wer off
and flush through cold, fill the centr
al heating system again, add
a flushing detergent, w
e highly recommend the use of a flushing
detergent appropriate for the metals used in the aluminium alloy
circuit. These include (Fernox Superfloc, BetzDearborn Sentinel
X300 or X400), whose function is to dissolve any foreign matter
that ma
y be in the system, and r
un the boiler on central heating
until it reaches its oper
ating temper
ature
, flush the system as
instructed by the manufacturer of the flushing detergent and refill
the system with a suitable corrosion inhibitor such as Fernox
3. COMMISSIONING
3.1 INITIAL PREPARATION