Guide

4. Check carefully for gas leaks immediately after the control
has been installed and the gas turned on. Do this before
attempting to operate the appliance or other gas
burning device. Use a rich soap solution (or other accepted
leak tester) to check all flanges, knobs, joints, and piping
connections. Wipe clean with a damp rag. It is a good practice
to periodically check for leakage during use of the appliance.
Absolutely no leakage should occur, otherwise there is a
danger of fire or explosion depending upon conditions.
Never use if leakage is detected.
5. Adjustments and Final Checkout
Removing cover
a. Unscrew the cover at the side of the thermostat knob.
b. Put a small screw driver in the slotted hole at the side of
the operation knob and lift the cover.
Pilot flame adjustment
c. Combination control is shipped with pilot flow at maximum.
d. Refer to the pilot burner manufacturer’s instruction for
recommended size of pilot flame.
e. If adjustment is required, turn the pilot adjustment screw
clockwise to decrease or counterclockwise to increase pilot
flame.
Outlet pressure adjustment (a gauge capable of reading
inches w.c. is required for any outlet pressure adjustments)
f. Remove cover to expose pressure regulator adjustment
screw.
g. Bring unit to high fire (all burners on maximum).
Slowly turn adjustment screw with a small screwdriver until
the required burner pressure is recorded on the pressure
gauge. Turn adjustment screw clockwise to increase or
counterclockwise to decrease gas pressure to main burner.
*Side-outlet manual valve minimum flow adjustment
h. Combination control is shipped
with the side-outlet manual
valve set at maximum flow. If
adjustment is required perform
step g., and then set the manual
valve knob (knob-C, Figure 2) to
the minimum positon.
Turn side-outlet manual valve
minimum adjustment screw
(Figure 2) clockwise to decrease
flow.
Main gas NPT connections (inlet or outlet)
e. Use joint compound/thread
sealant, properly threaded
pipes and careful assembly
procedure so that there is
no cross threading, etc.,
which can cause damage or
leakage.
f. Apply light pressure only at
wrench flats (see Figure 1)
to avoid damage to control
body, which can result in
leakage or malfunction of
control. Do not apply pressure
to top casting or plastic cover.
Main gas (outlet only)
and/or *side outlet tubing connection
g. Square off end of tubing and remove burrs.
h. Slip gland and ferrule over tubing.
I. Insert tubing into the outlet until it bottoms, slide ferrule
and gland into place and turn finger tight. Do not use joint
compound.
j. Use a wrench to tighten gland about one turn beyond finger
tight. (*if side outlet model, do not rotate outlet in its threads
to avoid possible leakage.)
Pilot gas connection (tubing only)
k. Square off the end of tubing and remove burrs.
l. Slip compression fitting over tubing. Insert tubing into pilot
outlet connection until it bottoms, slide fitting into place and
turn finger tight.
Do not use joint compound.
m. Use a wrench to tighten fitting about 1-1/2 turn beyond
finger tight.
n. Connect other end of tubing to pilot burner according to the
manufacturer’s instructions.
Thermocouple connection
o.
The gas control has an electrical themocouple connection
and must therefore be kept clean and dry; joint compound
should never be applied to it. Tighten only 1/4 turn beyond
finger tight in order to make a good electrical connection.
When mounting the themocouple tubing, do not bend it too
sharply (min.radius 25 mm).
Bulb Location and Mounting
p. Temperature sensing element is to be located and mounted
by the OEM and is not to be changed without consulting
factory or qualified serviceman. The temperature sensing
element should be placed in a location representative of
desired temperature. Never place directly in flame.
10
NEVER CONNECT CONTROL DIRECTLY TO THE
PROPANE SUPPLY SOURCE. LP APPLICATIONS
REQUIRE AN EXTERNAL REGULATOR (NOT SUPPLIED).
INSTALL THE EXTERNAL REGULATOR BETWEEN THE
PROPANE SUPPLY SOURCE AND
MERTIK MAXITROL CONTROL.
!
CAUTION
ADJUSTMENTS MUST BE MADE BY QUALIFIED
PERSONS ONLY. BEFORE ADJUSTMENTS CAN BE
MADE, THE COVER SHOULD BE REMOVED.
IF THE APPLIANCE MANUFACTURER SUPPLIES
CHECKOUT AND/OR SERVICE AND MAINTENANCE
INSTRUCTIONS, CAREFULLY FOLLOW THEM.
IF THESE INSTRUCTIONS ARE NOT PROVIDED THEN
USE THE FOLLOWING PROCEDURE.
!
WARNING
Figure 1
!
CAUTION
DO NOT BEND TUBING AT GAS CONTROL AFTER
COMPRESSION FITTING HAS BEEN TIGHTENED,
AS THIS MAY RESULT IN GAS LEAKAGE
AT THE CONNECTION.
11
Figure 2
(Shown with cover)