Halstead Eden CBX, Installation And Servicing Instructions

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21
COMMISSIONING & TESTING
5
5.1
FILLING THE WATER SYSTEM
Before commissioning the appliance, the whole gas installation
including the meter MUST be purged and tested for gas tightness
in accordance with BS 6891: 1988.
Open all doors and windows, extinguish naked lights,
and DO NOT SMOKE whilst purging the gas line.
It is recommended, where possible, to flush the CH
system without the appliance fitted, to avoid debris
and flux blocking the waterways within the
appliance.
Do not use the pressure relief valve to drain the
system, because dirt or debris could prevent the
valve seating correctly. If the valve leaks or sticks
closed, then replace it.
Before commencing the commissioning procedure, ensure that the
gas service cock is turned on, the electricity supply is isolated, and
that the CH and DHW pipe-work (where fitted) is complete. A
special feature of the CBX appliances is that the water systems can
be completely filled prior to fitting the appliance. It is
recommended that this procedure be followed even when the
appliance is to be fitted immediately after filling the system. Fill the
water systems by following the procedure detailed below steps 1
to 5, and referring to Figure 17.
17
COMMISSIONING THE WATER SYSTEM
1) Check that the CH flow, return, (and DHW return on SBX
appliance if used), isolating valves are in the open position.
2) Fill the system with water using one of the approved methods
described in section 3.7 to about 2.0 bar, (filling loop provided
on CBX appliances). Vent the system via the radiator valves and
system air vents in accordance with normal practice. Ensure that
all system air vents are closed.
To aid venting, a manual air vent is provided on the
LHS of the heat exchanger, and an automatic air
vent on the pump assembly.
3) Check the system for soundness.
4) Check the operation of the pressure relief valve (Figure 18) by
lifting the lever on the valve gently to ease the valve of its seat.
Checking that water is discharged, release the lever and ensure
that the valve seats correctly and does not leak.
18
5) Drain the entire system to flush out any debris, and refill to 0.2
bar above the system design pressure (between 0.5 and 1.5 bar)
by repeating the above procedure. Follow the commissioning
procedure described below, and then repeat this instruction with
the system hot. It is recommended that the system be cleaned with
a recognised system cleaner such as Fernox or Sentinel.
6) On CBX appliances, open the DHW inlet valve and operate
each hot water tap in turn to clear all the air from the pipes and
the appliance.
7) Remove the pump cap; use a screwdriver to rotate the pump
shaft. Replace the cap.
8) Disconnect the filling loop from the system.
9) Prior to lighting the appliance to check the gas rates, the
central heating system should be checked for circulation by
operating the appliance with the gas turned off, this is to ensure
that no air locks occur. The appliance may go into ignition lockout
and require resetting.
!
CH
RETURN
FILLING
LOOP
VALVE
DHW
FLOW
CH
FLOW
FILLING
LOOP
VALVE
COLD
WATER IN
GAS
SUPPLY
CH
DRAIN
FILLING
LOOP
CONDENSATE WASTE OUTLET
(NOTE: TRAP PARTS FITTED
INSIDE BOILER NOT ON
PLUMBING JIG)
CH
RETURN
CH
FLOW
SECONDARY
RETURN FROM
TANK (OPTIONAL)
GAS
SUPPLY
CH
DRAIN
CONDENSATE WASTE OUTLET
(NOTE: TRAP PARTS FITTED
INSIDE BOILER NOT ON
PLUMBING JIG)
PRESSURE GAUGE
CAPILLARY
PRESSURE RELIEF VALVE