COMET 145 – INSTALLATION/OPERATION MANUAL
5IM-OB-COM0-00
Mar/11
6
VENT PIPE 5”
Keep short with minimum of fittings. For chimney systems allow 1/4”
per foot rise to assist gas flow. See B139 Code and section
2.4
PLACEMENT & VENTING
. Must not pass through ceiling.
PIPING
1 1/4” pipe for supply and return unless otherwise specified. Select L
or R as required. See Figure - 4.
2.7 DOMESTIC HOT WATER COIL
Use a K25m coil only. For best performance always connect cold water supply to RHS fitting
on coil.
ACTUAL FLOW & TEMPERATURE RATES MAY VARY FROM COIL SPECIFICATION
2.8 ASSEMBLE & INSTALL BURNER
ASSEMBLE
Follow assembly and mounting instructions supplied by the burner
manufacturer.
END CONE
See burner insertion settings in section
7.0 BURNER
SPECIFICATIONS
or Figure – 1.
SELECT NOZZLE
Select oil input, nozzle required and burner configuration to correspond
with boiler settings table shown on operating decal or section
7.0
BURNER SPECIFICATIONS
.
INSTALL NOZZLE
Install selected nozzle and make sure it is tight in the nozzle adapter.
ELECTRODES
See burner manufacturer’s instructions.
INSERTION
See operating decal or Figure – 1.
MOUNT BURNER
Mount the burner and gasket on the boiler, inserting the burner head
through the opening in the front of the boiler. Tighten top nut first to
ensure burner tips slightly towards chamber.
WIRING
See Figure – 3 or wiring decal.
2.9 SET BURNER FOR EFFICIENT OPERATION
END CONE
See settings in section
7.0 BURNER SPECIFICATIONS
.
BURNER AIR
See settings in section
7.0 BURNER SPECIFICATIONS
.
PUMP PRESSURE
See settings in section
7.0 BURNER SPECIFICATIONS
.
SAMPLING HOLE
In vent pipe between boiler breech and draft control punch or drill a
1/4” diameter hole. Not applicable for Direct Vent.
DRAFT 0.04” WC
Using an accurate draft meter; adjust the draft control to obtain 0.04”
wc of draft at the breech sampling hole. Not applicable for Direct Vent.
