andrews CSC39 Installation Manual, Operation And Service Manual page 19

SECTION 3
FLUE
SYSTEMS
Fig 7.
g) The last pipe section may be cut to fit the distance required to reach the water heater
IMPORTANT! In order for the condensate trap to collect and dispose of the
condensate from the flue pipe, the flue system must have a downward slope
of 21mm per metre (0.25in/ft) towards the condensate trap. The condensate trap
must be installed as close as possible to the flue adaptor to prevent condensate
from accumulating and draining into the flue adaptor or blower.
h) Carefully measure the length of straight flue pipe needed, allowing for about 50mm
i) Use the large clamp supplied in the flue kit with the stepped gasket to seal the elbow
j) Condensate disposal: Connect either a 32mm (1.25in) slip joint drain connection or a
Note: On all flue installations, for distances over 1.5 metres, we recommend that a
Fig. 8.
16
INSTALLATION
Gasket End
flue connections. First, install the supplied condensate trap with crimped end into the
gasketed end of the elbow (horizontal flue installations) and clamp the condensate tee
and elbow together. Then install the crimped end of the elbow into the flue
connection of the water heater. On vertical installations, install the the crimped end of
the condensate trap directly onto the water heater flue connection. The 58.7kWh
models require the installation of a flue reducer (supplied) into the water heater flue
assembly before attaching the elbow or condensate trap (vertical flue).
(2in) insertion into the elbow. Mark the ungasketed end of the pipe to be cut and
carefully make a straight cut on the outside pipe to the desired length. Make sure the
inside tube is not cut. Then cut the inside flue pipe about 50mm (2in) more than the
outside pipe so that the flue pipe protrudes slightly beyond the outside pipe. Connect
the flue pipe and clamp at each end.
or condensate trap to the blower flue connector. The larger step of the gasket seals
the flue pipe to the cast flue adaptor.
25mm (1in) PVC compression coupling from the condensate trap nipple to 25mm
(1in) PVC piping to a drain or condensate disposal pump. Install a drain trap after the
condensate fitting to seal the flue system.
condensate trap is fitted.
Straight End
(Ungasketed)
Ribs Locked Beneath
Gasketed Clamp
Condensate Trap Nipple
1"(25mm) Compression
Coupling or 1
Slip joint Connection
1"(25mm) PVC Piping
Drain Trap
To Suitable Drain or
Condensate Disposable Pump
1
⁄ " (32mm)
4