Gulfstream GS A-Class 12/OV, Инструкции по проектированию, установке и обслуживанию

Страница: 23 / 44

Supplied By www.heating spares.co Tel. 0161 620 6677
Page 23
GULFSTREAM
A-CL
ASS
5. COMMISSIONING
(a) It is essential that the system functions properly for optimum performance. To
achieve this, the heating and the hot water system should be commissioned in
accordance with good practice and generally with the requirements of BS 6798,
BS 5449 and BS 7593. Full details of the requirements are given in PAS 33:1999
under section 10 Commissioning.
(b) An automatic air vent is built into the top of the appliance and the red cap should
be open during commissioning to ensure all air has been removed from the
system. After a suitable commissioning period the cap should be tightened for
long term safety.
IMPORTANT: To enable the appliance/system to fill easily please follow the
instructions on the appliance and remove the 3 port valve actuator.
(c) WARNING: Do not attempt to start this appliance unless the appliance and the
heating system have been filled with water and thoroughly vented.
5.1 INITIAL SYSTEM FILLING
(a) Open the cold water stop cock on the inlet to the appliance and allow water to
flow through the appliance to the domestic hot water taps. Ensure all air is vented
and there are no leaks.
(b) Open the central heating flow and return isolating valves.
5.1.1 Open Vented System
(a) Fill the open vented system in the normal way through the feed and expansion
(F & E) cistern.
(b) When the system is full check if the water level in the F & E cistern is correct and
adjust the ballvalve if necessary.
(c) Check the functioning of the overflow/warning pipe and regulate the service valve
so that in a fault condition, the warning/overflow pipe can carry the maximum
water supply into the F&E cistern.
COMMISSIONING
5.1.2 Sealed System
(a) The sealed system model is fitted with an
automatic filling device (CA-Valve) and
the system is filled directly from the mains
supply to a nominal operating pressure of
1.0 bar (when cold).
(b) Before filling check the air pressure in the
expansion vessel is 1.0 bar and if necessary
adjust it to 1.0bar or the recommended
system design pressure.
(c) Open isolating valves ‘A’ and ‘B’ (figure 4.3)
and fill and vent the system in the normal
way.
(d) If draining down is necessary, first release
any internal pressure by opening the
pressure relief valve, then after ensuring that
all system and boiler vents are open, open
the drain valve.
5.2 PRELIMINARY ELECTRICAL AND GAS
SYSTEM CHECKS
(a) These electrical checks must be carried out
prior to attempting to start the appliance.
They are; Earth Continuity, Short circuit,
Resistance to Earth and Polarity.
The gas installation including the gas
meter must be inspected and tested for gas
soundness and purged in accordance with
the recommendations of the current issue
of BS 6891 before attempting to start the
appliance.
Appliance terminal Programmer & room thermostat terminal
L-P Programmer ‘L’ supply in
N Programmer ‘N’ supply in
E Programmer ‘ E’ supply in
SL-h1 HTG switched live ‘SL’ out from programmer
SL-W HW switched live ‘SL’ out from programmer
L-R Room thermostat ‘L’ supply in
N Room thermostst ‘N’ supply in
E Room thermostat ‘E’ supply in
SL-h2 Switched live ‘SL’ out from room thermostat
4.2.6 Frost Thermostat
(a) The appliance has built in frost protection which will prevent the appliance
temperature dropping below about 5 o C.
(b) However if a frost thermostat is required and fitted to protect other parts of
the system, then it should be wired in to the appliance control panel across
terminals L-P and SL-h1 and SL-h2. For further details please contact our technical
department.