K4C COMPACT-MULTI – INSTALLATION/OPERATION MANUAL
K4C Compact-multi
Feb
-06
7
3.8 CHANGING NOZZLE
NOZZLE CHANGE
If a new nozzle of a different size is installed, change the
heating blower speed according to the specifications table.
3.9 SET BURNER FOR EFFICIENT OPERATION
SET END CONE
Set turbulator to furnace operating decal settings.
Particularly if you change nozzles.
PUMP PRESSURE
Refer to “BURNER SPECIFICATIONS” or operating decal.
BURNER AIR
Set air damper as settings on operating decal.
SAMPLING HOLE
On smoke/vent pipe, between appliance breech and draft
control, punch or drill a 1/4” round opening. Not applicable
to Direct Vent.
DRAFT PRESSURE
Using an accurate draft meter, adjust the draft control to
obtain -0.04” wc draft pressure at the breech sampling hole.
Use two barometric dampers if necessary. Not applicable to
Direct Vent.
BURNER SETTING
Set the burner to give a stable symmetrical flame. After 15
minutes of normal operation, check SMOKE for #0-trace
reading and measure CO
2
.
Re adjust the burner controls as
required.
EFFICIENCY
Always leave burner set with CO
2
reading about 1% of CO
2
lower than the peak efficiency achieved with a #0-trace
smoke (e.g. a #0-trace reading of 12.5% CO
2
should be set
back 1% to 11.5%). This gives better allowance for fuel and
draft variations and maintains a better seasonal efficiency.
When the burner is set, lock the adjustments with the locking
nuts.
FLAME CHECK
Look through view port to check the flame after setting the
burner. If the flame is not clean and symmetrical, reset the
burner or replace the nozzle, use only nozzle types specified
on settings label.
Always set flame with proper draft, smoke and CO
2
measurements.
DO NOT START BURNER UNTIL ALL FITTINGS AND COVERS ARE IN PLACE.
