Roberts Gorden Blackheat BH15 UT Installation & Servicing Instructions Manual page 29

S S e e c c t t i i o o n n 1 1 0 0 . . G G a a s s C C o o n n v v e e r r s s i i o o n n I I n n s s t t r r u u c c t t i i o o n n s s
It is the installer's responsibility to follow these instructions and
to insure that all local and national codes are followed. Insure
that you are capable of performing all steps and read the
entire section before beginning this procedure.
NOTE: For conversion between G20 and G25, or Propane and
Butane, no change in jet size is necessary; remove (2)
screws from control side door, open and proceed to step
10.3.5.
1 1 0 0 . . 1 1 G G A A S S C C O O N N V V E E R R S S I I O O N N K K I I T T S S I I N N C C L L U U D D E E : :
- Jet as required; see burner specifications (pg. 4)
* - Governor spring. (Propane/Butane: Green)
- Valve/governor label.
- Burner unit label for gas conversion (to natural G20,
G25, propane or butane).
(*) TEKNIGAS valves only
1 1 0 0 . . 2 2 R R E E Q Q U U I I R R E E D D T T O O O O L L S S : :
- Spanner 13 mm (1/2") - to remove jet.
- Manometer - minimum 0-28 mBar (0-11" W.G.)
- Phillips screwdriver (#2)
-or-
- 1/4" Nut Driver
- Flat blade screwdriver.
- Spanner 8mm - to adjust Governor (SIT valve only)
1 1 0 0 . . 3 3 C C O O N N V V E E R R S S I I O O N N P P R R O O C C E E D D U U R R E E : :
10.3.1 Isolate gas and electric supply; remove fresh air duct
if necessary.
10.3.2 Remove cover screws; withdraw the edge connector
and the ignition lead from the automatic control unit;
set cover aside.
10.3.3 This step is for the TEKNIGAS model valve only.
Remove governor screw and spring; replace with
spring included in kit and refit governor screw. See
Figure 21 - Governor Spring Replacement.
10.3.4 Remove burner cup and jet; replace with the jet pro-
vided in the kit. Reinstall the burner cup. See Figure
24 for proper position of cup relative to the air plate.
10.3.5 Attach valve/governor label to side of valve body.
(Natural: Silver)
10.3.6 Attach gas conversion label indicating gas type to
burner housing adjacent to data plate; fill in governor
pressure setting.
10.3.7 Replace door assembly and refit edge connector and
ignition lead to the automatic control unit; do not
attach screws to control side door at this time.
NOTE: For propane/butane pressure couple (TEKNI-
GAS valve, Italy only): turn governor screw down
(clockwise) until the regulator is at the bottom;
replace the plastic capscrew over the governor spring;
proceed to step 10.3.12.
10.3.8 Attach one end of hose to the governor pressure tap
and the other end to the pressure side of a manome-
ter.
10.3.9 Turn on gas and electrical supply, operate unit.
10.3.10 Set governor pressure according to the burner specifi-
cations (pg. 4) by turning the governor screw until the
proper pressure is read on the manometer.
10.3.11 Shut off unit and remove manometer. Return the shut
off screw in the governor pressure tap to the off posi-
tion and replace the screw cap over the governor
spring (TEKNIGAS valve only).
10.3.12 Reinstall screws to the control side door and refit the
fresh air duct if necessary.
10.3.13 Review section 9.1 servicing instructions: annual pro-
cedure. Return unit to service.
1 1 0 0 . . 4 4 A A D D J J U U S S T T M M E E N N T T O O F F S S T T E E P P -O O P P E E N N I I N N G G F F L L O O W W R R A A T T E E
( ( S S I I T T V V A A L L V V E E O O N N L L Y Y ) ) : :
10.4.1 To adjust, gradually turn screw marked "I Step" until
ignition is prompt and silent. Clockwise rotation: start
flow decreases. (see Figure 22). The step-open flow
rate should allow 2.5 mbar (1.0 in wg) gas pressure to
the jet. After proper adjustment of the step-open flow
rate, the valve will fully open within a few seconds and
the governor pressure may then be set.
10.4.2 Wait at least 40 seconds after deenergization of sole-
noids before checking for proper ignition.
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