28
Grant Vortex Indoor/Utility, System and Boiler House Oil Boilers
5 - CONDENSATE DISPOSAL
Backfill both the soakaway tube, and the hole around
it, with 10 mm limestone chippings.
Only use a soakaway where the soil is porous and
drains easily. Do not use in clay soils or where the
soil is poorly drained.
Condensate trap
5.5
Fig. 17a - Condensate trap (Boiler House models)
If connecting the condensate discharge (either internally
or externally) into a waste system or soil stack - the
sealing cap MUST be fitted in the trap outlet.
On external discharge systems to a hopper, gully or
soakaway, the sealing cap should be removed from the
trap outlet.
If there is any discharge of condensate from the overflow
outlet, this could indicate a blockage (possibly due to
freezing). Turn off the boiler and investigate the cause. If
necessary contact your service engineer for assistance.
Care should be taken when siting the trap such that the
overflow outlet is readily visible and that any
condensate overflowing from the outlet cannot cause
either a hazard to persons or damage to surrounding
property or equipment.
The condensate trap outlet is at an angle of 48° below
the horizontal. This is to automatically give a 3° fall on
any 'horizontal' runs of condensate disposal pipe. Refer
to Fig.17.
The outlet of the trap will accept 21.5 mm to 23 mm
OD Polypropylene overflow pipe for the condensate
discharge pipe.
Condensate
drain from boiler
Minimum 2° fall
Overflow warning
outlet (with cap)
Condensate trap
Condensate
outlet to drain
Wall bracket
Fig. 17 - Condensate trap (Indoor/Utility)
Condensate
trap
Condensate
outlet to
drain
Overflow
warning
outlet
(with cap)
Condensate
drain pipe
from boiler
Condensate disposal pipework
5.6
WARNING: Any damage due to condensate backing
up into the boiler due to a high water table, in the case
of a soakaway, or flooded drains when the condensate
disposal is via a gulley or soil stack, is not covered by
the Grant product warranty.
Grant Vortex boilers are supplied with a factory-fitted
condensate trap to provide the required 75 mm water seal
in the condensate discharge pipe from the boiler.
The condensate trap for the Boiler House models is
supplied loose in the burner box and needs to be fitted as
shown in Fig. 17a.
This trap incorporates a float (which will create a seal
when the trap is empty) and an overflow warning
outlet (fitted with a plastic sealing cap), See Fig. 17.
The trap is factory-fitted inside the boiler casing
(mounted on the inside of the left side panel) in an
accessible position to allow for routine maintenance.
Note: If required, this condensate trap may be re-
located outside the boiler casing. Refer to procedure
given in Section 5.8. This procedure MUST be carried
out before the boiler is installed.
A flexible hose connects the outlet of the condensing
heat exchanger to the trap inlet. Ensure the straight
connector on the hose is fully pushed onto the 'top hat'
inlet connector of the trap.
With the trap fitted inside the boiler casing, the sealing
cap MUST be fitted. If the trap is re-located outside
the boiler then the following applies:
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